PostgreSQL Source Code  git master
copy.h File Reference
#include "nodes/execnodes.h"
#include "nodes/parsenodes.h"
#include "parser/parse_node.h"
#include "tcop/dest.h"
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Data Structures

struct  CopyFormatOptions
 

Typedefs

typedef enum CopyHeaderChoice CopyHeaderChoice
 
typedef struct CopyFormatOptions CopyFormatOptions
 
typedef struct CopyFromStateDataCopyFromState
 
typedef struct CopyToStateDataCopyToState
 
typedef int(* copy_data_source_cb) (void *outbuf, int minread, int maxread)
 
typedef void(* copy_data_dest_cb) (void *data, int len)
 

Enumerations

enum  CopyHeaderChoice { COPY_HEADER_FALSE = 0 , COPY_HEADER_TRUE , COPY_HEADER_MATCH }
 

Functions

void DoCopy (ParseState *pstate, const CopyStmt *stmt, int stmt_location, int stmt_len, uint64 *processed)
 
void ProcessCopyOptions (ParseState *pstate, CopyFormatOptions *opts_out, bool is_from, List *options)
 
CopyFromState BeginCopyFrom (ParseState *pstate, Relation rel, Node *whereClause, const char *filename, bool is_program, copy_data_source_cb data_source_cb, List *attnamelist, List *options)
 
void EndCopyFrom (CopyFromState cstate)
 
bool NextCopyFrom (CopyFromState cstate, ExprContext *econtext, Datum *values, bool *nulls)
 
bool NextCopyFromRawFields (CopyFromState cstate, char ***fields, int *nfields)
 
void CopyFromErrorCallback (void *arg)
 
uint64 CopyFrom (CopyFromState cstate)
 
DestReceiverCreateCopyDestReceiver (void)
 
CopyToState BeginCopyTo (ParseState *pstate, Relation rel, RawStmt *raw_query, Oid queryRelId, const char *filename, bool is_program, copy_data_dest_cb data_dest_cb, List *attnamelist, List *options)
 
void EndCopyTo (CopyToState cstate)
 
uint64 DoCopyTo (CopyToState cstate)
 
ListCopyGetAttnums (TupleDesc tupDesc, Relation rel, List *attnamelist)
 

Typedef Documentation

◆ copy_data_dest_cb

typedef void(* copy_data_dest_cb) (void *data, int len)

Definition at line 69 of file copy.h.

◆ copy_data_source_cb

typedef int(* copy_data_source_cb) (void *outbuf, int minread, int maxread)

Definition at line 68 of file copy.h.

◆ CopyFormatOptions

◆ CopyFromState

Definition at line 65 of file copy.h.

◆ CopyHeaderChoice

◆ CopyToState

typedef struct CopyToStateData* CopyToState

Definition at line 66 of file copy.h.

Enumeration Type Documentation

◆ CopyHeaderChoice

Enumerator
COPY_HEADER_FALSE 
COPY_HEADER_TRUE 
COPY_HEADER_MATCH 

Definition at line 26 of file copy.h.

27 {
CopyHeaderChoice
Definition: copy.h:27
@ COPY_HEADER_TRUE
Definition: copy.h:29
@ COPY_HEADER_FALSE
Definition: copy.h:28
@ COPY_HEADER_MATCH
Definition: copy.h:30

Function Documentation

◆ BeginCopyFrom()

CopyFromState BeginCopyFrom ( ParseState pstate,
Relation  rel,
Node whereClause,
const char *  filename,
bool  is_program,
copy_data_source_cb  data_source_cb,
List attnamelist,
List options 
)

Definition at line 1339 of file copyfrom.c.

1347 {
1348  CopyFromState cstate;
1349  bool pipe = (filename == NULL);
1350  TupleDesc tupDesc;
1351  AttrNumber num_phys_attrs,
1352  num_defaults;
1353  FmgrInfo *in_functions;
1354  Oid *typioparams;
1355  Oid in_func_oid;
1356  int *defmap;
1357  ExprState **defexprs;
1358  MemoryContext oldcontext;
1359  bool volatile_defexprs;
1360  const int progress_cols[] = {
1364  };
1365  int64 progress_vals[] = {
1367  0,
1368  0
1369  };
1370 
1371  /* Allocate workspace and zero all fields */
1372  cstate = (CopyFromStateData *) palloc0(sizeof(CopyFromStateData));
1373 
1374  /*
1375  * We allocate everything used by a cstate in a new memory context. This
1376  * avoids memory leaks during repeated use of COPY in a query.
1377  */
1379  "COPY",
1381 
1382  oldcontext = MemoryContextSwitchTo(cstate->copycontext);
1383 
1384  /* Extract options from the statement node tree */
1385  ProcessCopyOptions(pstate, &cstate->opts, true /* is_from */ , options);
1386 
1387  /* Process the target relation */
1388  cstate->rel = rel;
1389 
1390  tupDesc = RelationGetDescr(cstate->rel);
1391 
1392  /* process common options or initialization */
1393 
1394  /* Generate or convert list of attributes to process */
1395  cstate->attnumlist = CopyGetAttnums(tupDesc, cstate->rel, attnamelist);
1396 
1397  num_phys_attrs = tupDesc->natts;
1398 
1399  /* Convert FORCE_NOT_NULL name list to per-column flags, check validity */
1400  cstate->opts.force_notnull_flags = (bool *) palloc0(num_phys_attrs * sizeof(bool));
1401  if (cstate->opts.force_notnull)
1402  {
1403  List *attnums;
1404  ListCell *cur;
1405 
1406  attnums = CopyGetAttnums(tupDesc, cstate->rel, cstate->opts.force_notnull);
1407 
1408  foreach(cur, attnums)
1409  {
1410  int attnum = lfirst_int(cur);
1411  Form_pg_attribute attr = TupleDescAttr(tupDesc, attnum - 1);
1412 
1413  if (!list_member_int(cstate->attnumlist, attnum))
1414  ereport(ERROR,
1415  (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
1416  errmsg("FORCE_NOT_NULL column \"%s\" not referenced by COPY",
1417  NameStr(attr->attname))));
1418  cstate->opts.force_notnull_flags[attnum - 1] = true;
1419  }
1420  }
1421 
1422  /* Convert FORCE_NULL name list to per-column flags, check validity */
1423  cstate->opts.force_null_flags = (bool *) palloc0(num_phys_attrs * sizeof(bool));
1424  if (cstate->opts.force_null)
1425  {
1426  List *attnums;
1427  ListCell *cur;
1428 
1429  attnums = CopyGetAttnums(tupDesc, cstate->rel, cstate->opts.force_null);
1430 
1431  foreach(cur, attnums)
1432  {
1433  int attnum = lfirst_int(cur);
1434  Form_pg_attribute attr = TupleDescAttr(tupDesc, attnum - 1);
1435 
1436  if (!list_member_int(cstate->attnumlist, attnum))
1437  ereport(ERROR,
1438  (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
1439  errmsg("FORCE_NULL column \"%s\" not referenced by COPY",
1440  NameStr(attr->attname))));
1441  cstate->opts.force_null_flags[attnum - 1] = true;
1442  }
1443  }
1444 
1445  /* Convert convert_selectively name list to per-column flags */
1446  if (cstate->opts.convert_selectively)
1447  {
1448  List *attnums;
1449  ListCell *cur;
1450 
1451  cstate->convert_select_flags = (bool *) palloc0(num_phys_attrs * sizeof(bool));
1452 
1453  attnums = CopyGetAttnums(tupDesc, cstate->rel, cstate->opts.convert_select);
1454 
1455  foreach(cur, attnums)
1456  {
1457  int attnum = lfirst_int(cur);
1458  Form_pg_attribute attr = TupleDescAttr(tupDesc, attnum - 1);
1459 
1460  if (!list_member_int(cstate->attnumlist, attnum))
1461  ereport(ERROR,
1462  (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
1463  errmsg_internal("selected column \"%s\" not referenced by COPY",
1464  NameStr(attr->attname))));
1465  cstate->convert_select_flags[attnum - 1] = true;
1466  }
1467  }
1468 
1469  /* Use client encoding when ENCODING option is not specified. */
1470  if (cstate->opts.file_encoding < 0)
1472  else
1473  cstate->file_encoding = cstate->opts.file_encoding;
1474 
1475  /*
1476  * Look up encoding conversion function.
1477  */
1478  if (cstate->file_encoding == GetDatabaseEncoding() ||
1479  cstate->file_encoding == PG_SQL_ASCII ||
1481  {
1482  cstate->need_transcoding = false;
1483  }
1484  else
1485  {
1486  cstate->need_transcoding = true;
1489  }
1490 
1491  cstate->copy_src = COPY_FILE; /* default */
1492 
1493  cstate->whereClause = whereClause;
1494 
1495  /* Initialize state variables */
1496  cstate->eol_type = EOL_UNKNOWN;
1497  cstate->cur_relname = RelationGetRelationName(cstate->rel);
1498  cstate->cur_lineno = 0;
1499  cstate->cur_attname = NULL;
1500  cstate->cur_attval = NULL;
1501  cstate->relname_only = false;
1502 
1503  /*
1504  * Allocate buffers for the input pipeline.
1505  *
1506  * attribute_buf and raw_buf are used in both text and binary modes, but
1507  * input_buf and line_buf only in text mode.
1508  */
1509  cstate->raw_buf = palloc(RAW_BUF_SIZE + 1);
1510  cstate->raw_buf_index = cstate->raw_buf_len = 0;
1511  cstate->raw_reached_eof = false;
1512 
1513  if (!cstate->opts.binary)
1514  {
1515  /*
1516  * If encoding conversion is needed, we need another buffer to hold
1517  * the converted input data. Otherwise, we can just point input_buf
1518  * to the same buffer as raw_buf.
1519  */
1520  if (cstate->need_transcoding)
1521  {
1522  cstate->input_buf = (char *) palloc(INPUT_BUF_SIZE + 1);
1523  cstate->input_buf_index = cstate->input_buf_len = 0;
1524  }
1525  else
1526  cstate->input_buf = cstate->raw_buf;
1527  cstate->input_reached_eof = false;
1528 
1529  initStringInfo(&cstate->line_buf);
1530  }
1531 
1532  initStringInfo(&cstate->attribute_buf);
1533 
1534  /* Assign range table and rteperminfos, we'll need them in CopyFrom. */
1535  if (pstate)
1536  {
1537  cstate->range_table = pstate->p_rtable;
1538  cstate->rteperminfos = pstate->p_rteperminfos;
1539  }
1540 
1541  tupDesc = RelationGetDescr(cstate->rel);
1542  num_phys_attrs = tupDesc->natts;
1543  num_defaults = 0;
1544  volatile_defexprs = false;
1545 
1546  /*
1547  * Pick up the required catalog information for each attribute in the
1548  * relation, including the input function, the element type (to pass to
1549  * the input function), and info about defaults and constraints. (Which
1550  * input function we use depends on text/binary format choice.)
1551  */
1552  in_functions = (FmgrInfo *) palloc(num_phys_attrs * sizeof(FmgrInfo));
1553  typioparams = (Oid *) palloc(num_phys_attrs * sizeof(Oid));
1554  defmap = (int *) palloc(num_phys_attrs * sizeof(int));
1555  defexprs = (ExprState **) palloc(num_phys_attrs * sizeof(ExprState *));
1556 
1557  for (int attnum = 1; attnum <= num_phys_attrs; attnum++)
1558  {
1559  Form_pg_attribute att = TupleDescAttr(tupDesc, attnum - 1);
1560 
1561  /* We don't need info for dropped attributes */
1562  if (att->attisdropped)
1563  continue;
1564 
1565  /* Fetch the input function and typioparam info */
1566  if (cstate->opts.binary)
1567  getTypeBinaryInputInfo(att->atttypid,
1568  &in_func_oid, &typioparams[attnum - 1]);
1569  else
1570  getTypeInputInfo(att->atttypid,
1571  &in_func_oid, &typioparams[attnum - 1]);
1572  fmgr_info(in_func_oid, &in_functions[attnum - 1]);
1573 
1574  /* Get default info if needed */
1575  if (!list_member_int(cstate->attnumlist, attnum) && !att->attgenerated)
1576  {
1577  /* attribute is NOT to be copied from input */
1578  /* use default value if one exists */
1579  Expr *defexpr = (Expr *) build_column_default(cstate->rel,
1580  attnum);
1581 
1582  if (defexpr != NULL)
1583  {
1584  /* Run the expression through planner */
1585  defexpr = expression_planner(defexpr);
1586 
1587  /* Initialize executable expression in copycontext */
1588  defexprs[num_defaults] = ExecInitExpr(defexpr, NULL);
1589  defmap[num_defaults] = attnum - 1;
1590  num_defaults++;
1591 
1592  /*
1593  * If a default expression looks at the table being loaded,
1594  * then it could give the wrong answer when using
1595  * multi-insert. Since database access can be dynamic this is
1596  * hard to test for exactly, so we use the much wider test of
1597  * whether the default expression is volatile. We allow for
1598  * the special case of when the default expression is the
1599  * nextval() of a sequence which in this specific case is
1600  * known to be safe for use with the multi-insert
1601  * optimization. Hence we use this special case function
1602  * checker rather than the standard check for
1603  * contain_volatile_functions().
1604  */
1605  if (!volatile_defexprs)
1606  volatile_defexprs = contain_volatile_functions_not_nextval((Node *) defexpr);
1607  }
1608  }
1609  }
1610 
1611 
1612  /* initialize progress */
1614  cstate->rel ? RelationGetRelid(cstate->rel) : InvalidOid);
1615  cstate->bytes_processed = 0;
1616 
1617  /* We keep those variables in cstate. */
1618  cstate->in_functions = in_functions;
1619  cstate->typioparams = typioparams;
1620  cstate->defmap = defmap;
1621  cstate->defexprs = defexprs;
1622  cstate->volatile_defexprs = volatile_defexprs;
1623  cstate->num_defaults = num_defaults;
1624  cstate->is_program = is_program;
1625 
1626  if (data_source_cb)
1627  {
1628  progress_vals[1] = PROGRESS_COPY_TYPE_CALLBACK;
1629  cstate->copy_src = COPY_CALLBACK;
1630  cstate->data_source_cb = data_source_cb;
1631  }
1632  else if (pipe)
1633  {
1634  progress_vals[1] = PROGRESS_COPY_TYPE_PIPE;
1635  Assert(!is_program); /* the grammar does not allow this */
1637  ReceiveCopyBegin(cstate);
1638  else
1639  cstate->copy_file = stdin;
1640  }
1641  else
1642  {
1643  cstate->filename = pstrdup(filename);
1644 
1645  if (cstate->is_program)
1646  {
1647  progress_vals[1] = PROGRESS_COPY_TYPE_PROGRAM;
1648  cstate->copy_file = OpenPipeStream(cstate->filename, PG_BINARY_R);
1649  if (cstate->copy_file == NULL)
1650  ereport(ERROR,
1652  errmsg("could not execute command \"%s\": %m",
1653  cstate->filename)));
1654  }
1655  else
1656  {
1657  struct stat st;
1658 
1659  progress_vals[1] = PROGRESS_COPY_TYPE_FILE;
1660  cstate->copy_file = AllocateFile(cstate->filename, PG_BINARY_R);
1661  if (cstate->copy_file == NULL)
1662  {
1663  /* copy errno because ereport subfunctions might change it */
1664  int save_errno = errno;
1665 
1666  ereport(ERROR,
1668  errmsg("could not open file \"%s\" for reading: %m",
1669  cstate->filename),
1670  (save_errno == ENOENT || save_errno == EACCES) ?
1671  errhint("COPY FROM instructs the PostgreSQL server process to read a file. "
1672  "You may want a client-side facility such as psql's \\copy.") : 0));
1673  }
1674 
1675  if (fstat(fileno(cstate->copy_file), &st))
1676  ereport(ERROR,
1678  errmsg("could not stat file \"%s\": %m",
1679  cstate->filename)));
1680 
1681  if (S_ISDIR(st.st_mode))
1682  ereport(ERROR,
1683  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1684  errmsg("\"%s\" is a directory", cstate->filename)));
1685 
1686  progress_vals[2] = st.st_size;
1687  }
1688  }
1689 
1690  pgstat_progress_update_multi_param(3, progress_cols, progress_vals);
1691 
1692  if (cstate->opts.binary)
1693  {
1694  /* Read and verify binary header */
1695  ReceiveCopyBinaryHeader(cstate);
1696  }
1697 
1698  /* create workspace for CopyReadAttributes results */
1699  if (!cstate->opts.binary)
1700  {
1701  AttrNumber attr_count = list_length(cstate->attnumlist);
1702 
1703  cstate->max_fields = attr_count;
1704  cstate->raw_fields = (char **) palloc(attr_count * sizeof(char *));
1705  }
1706 
1707  MemoryContextSwitchTo(oldcontext);
1708 
1709  return cstate;
1710 }
int16 AttrNumber
Definition: attnum.h:21
List * CopyGetAttnums(TupleDesc tupDesc, Relation rel, List *attnamelist)
Definition: copy.c:722
void ProcessCopyOptions(ParseState *pstate, CopyFormatOptions *opts_out, bool is_from, List *options)
Definition: copy.c:405
void pgstat_progress_start_command(ProgressCommandType cmdtype, Oid relid)
void pgstat_progress_update_multi_param(int nparam, const int *index, const int64 *val)
@ PROGRESS_COMMAND_COPY
#define NameStr(name)
Definition: c.h:682
#define PG_BINARY_R
Definition: c.h:1211
bool contain_volatile_functions_not_nextval(Node *clause)
Definition: clauses.c:555
#define INPUT_BUF_SIZE
@ EOL_UNKNOWN
#define RAW_BUF_SIZE
void ReceiveCopyBinaryHeader(CopyFromState cstate)
void ReceiveCopyBegin(CopyFromState cstate)
@ COPY_FILE
Definition: copyto.c:52
@ COPY_CALLBACK
Definition: copyto.c:54
@ DestRemote
Definition: dest.h:91
struct cursor * cur
Definition: ecpg.c:28
int errmsg_internal(const char *fmt,...)
Definition: elog.c:993
int errcode_for_file_access(void)
Definition: elog.c:718
int errhint(const char *fmt,...)
Definition: elog.c:1153
int errcode(int sqlerrcode)
Definition: elog.c:695
int errmsg(const char *fmt,...)
Definition: elog.c:906
#define ERROR
Definition: elog.h:35
#define ereport(elevel,...)
Definition: elog.h:145
ExprState * ExecInitExpr(Expr *node, PlanState *parent)
Definition: execExpr.c:124
FILE * AllocateFile(const char *name, const char *mode)
Definition: fd.c:2383
FILE * OpenPipeStream(const char *command, const char *mode)
Definition: fd.c:2486
void fmgr_info(Oid functionId, FmgrInfo *finfo)
Definition: fmgr.c:126
Assert(fmt[strlen(fmt) - 1] !='\n')
bool list_member_int(const List *list, int datum)
Definition: list.c:701
void getTypeInputInfo(Oid type, Oid *typInput, Oid *typIOParam)
Definition: lsyscache.c:2832
void getTypeBinaryInputInfo(Oid type, Oid *typReceive, Oid *typIOParam)
Definition: lsyscache.c:2898
int GetDatabaseEncoding(void)
Definition: mbutils.c:1210
int pg_get_client_encoding(void)
Definition: mbutils.c:336
char * pstrdup(const char *in)
Definition: mcxt.c:1483
void * palloc0(Size size)
Definition: mcxt.c:1230
MemoryContext CurrentMemoryContext
Definition: mcxt.c:124
void * palloc(Size size)
Definition: mcxt.c:1199
#define AllocSetContextCreate
Definition: memutils.h:129
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:153
Oid FindDefaultConversionProc(int32 for_encoding, int32 to_encoding)
Definition: namespace.c:3753
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:135
int16 attnum
Definition: pg_attribute.h:83
FormData_pg_attribute * Form_pg_attribute
Definition: pg_attribute.h:207
static char * filename
Definition: pg_dumpall.c:119
static int list_length(const List *l)
Definition: pg_list.h:150
#define lfirst_int(lc)
Definition: pg_list.h:171
@ PG_SQL_ASCII
Definition: pg_wchar.h:226
Expr * expression_planner(Expr *expr)
Definition: planner.c:6151
CommandDest whereToSendOutput
Definition: postgres.c:85
#define InvalidOid
Definition: postgres_ext.h:36
unsigned int Oid
Definition: postgres_ext.h:31
#define PROGRESS_COPY_COMMAND
Definition: progress.h:141
#define PROGRESS_COPY_TYPE_FILE
Definition: progress.h:149
#define PROGRESS_COPY_COMMAND_FROM
Definition: progress.h:145
#define PROGRESS_COPY_TYPE
Definition: progress.h:142
#define PROGRESS_COPY_TYPE_PROGRAM
Definition: progress.h:150
#define PROGRESS_COPY_BYTES_TOTAL
Definition: progress.h:138
#define PROGRESS_COPY_TYPE_CALLBACK
Definition: progress.h:152
#define PROGRESS_COPY_TYPE_PIPE
Definition: progress.h:151
#define RelationGetRelid(relation)
Definition: rel.h:501
#define RelationGetDescr(relation)
Definition: rel.h:527
#define RelationGetRelationName(relation)
Definition: rel.h:535
Node * build_column_default(Relation rel, int attrno)
void initStringInfo(StringInfo str)
Definition: stringinfo.c:59
bool binary
Definition: copy.h:43
bool convert_selectively
Definition: copy.h:60
List * force_null
Definition: copy.h:58
List * convert_select
Definition: copy.h:61
bool * force_notnull_flags
Definition: copy.h:57
int file_encoding
Definition: copy.h:41
bool * force_null_flags
Definition: copy.h:59
List * force_notnull
Definition: copy.h:56
ExprState ** defexprs
copy_data_source_cb data_source_cb
StringInfoData line_buf
CopyFormatOptions opts
StringInfoData attribute_buf
MemoryContext copycontext
const char * cur_attval
const char * cur_attname
const char * cur_relname
Definition: fmgr.h:57
Definition: pg_list.h:52
Definition: nodes.h:118
List * p_rteperminfos
Definition: parse_node.h:187
List * p_rtable
Definition: parse_node.h:186
#define TupleDescAttr(tupdesc, i)
Definition: tupdesc.h:92
#define S_ISDIR(m)
Definition: win32_port.h:327
#define fstat
Definition: win32_port.h:285

References AllocateFile(), ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, Assert(), attnum, CopyFromStateData::attnumlist, CopyFromStateData::attribute_buf, CopyFormatOptions::binary, build_column_default(), CopyFromStateData::bytes_processed, contain_volatile_functions_not_nextval(), CopyFromStateData::conversion_proc, CopyFormatOptions::convert_select, CopyFromStateData::convert_select_flags, CopyFormatOptions::convert_selectively, COPY_CALLBACK, COPY_FILE, CopyFromStateData::copy_file, CopyFromStateData::copy_src, CopyFromStateData::copycontext, CopyGetAttnums(), cur, CopyFromStateData::cur_attname, CopyFromStateData::cur_attval, CopyFromStateData::cur_lineno, CopyFromStateData::cur_relname, CurrentMemoryContext, CopyFromStateData::data_source_cb, CopyFromStateData::defexprs, CopyFromStateData::defmap, DestRemote, CopyFromStateData::eol_type, EOL_UNKNOWN, ereport, errcode(), errcode_for_file_access(), errhint(), errmsg(), errmsg_internal(), ERROR, ExecInitExpr(), expression_planner(), CopyFormatOptions::file_encoding, CopyFromStateData::file_encoding, filename, CopyFromStateData::filename, FindDefaultConversionProc(), fmgr_info(), CopyFormatOptions::force_notnull, CopyFormatOptions::force_notnull_flags, CopyFormatOptions::force_null, CopyFormatOptions::force_null_flags, fstat, GetDatabaseEncoding(), getTypeBinaryInputInfo(), getTypeInputInfo(), CopyFromStateData::in_functions, initStringInfo(), CopyFromStateData::input_buf, CopyFromStateData::input_buf_index, CopyFromStateData::input_buf_len, INPUT_BUF_SIZE, CopyFromStateData::input_reached_eof, InvalidOid, CopyFromStateData::is_program, lfirst_int, CopyFromStateData::line_buf, list_length(), list_member_int(), CopyFromStateData::max_fields, MemoryContextSwitchTo(), NameStr, TupleDescData::natts, CopyFromStateData::need_transcoding, CopyFromStateData::num_defaults, OpenPipeStream(), CopyFromStateData::opts, ParseState::p_rtable, ParseState::p_rteperminfos, palloc(), palloc0(), PG_BINARY_R, pg_get_client_encoding(), PG_SQL_ASCII, pgstat_progress_start_command(), pgstat_progress_update_multi_param(), ProcessCopyOptions(), PROGRESS_COMMAND_COPY, PROGRESS_COPY_BYTES_TOTAL, PROGRESS_COPY_COMMAND, PROGRESS_COPY_COMMAND_FROM, PROGRESS_COPY_TYPE, PROGRESS_COPY_TYPE_CALLBACK, PROGRESS_COPY_TYPE_FILE, PROGRESS_COPY_TYPE_PIPE, PROGRESS_COPY_TYPE_PROGRAM, pstrdup(), CopyFromStateData::range_table, CopyFromStateData::raw_buf, CopyFromStateData::raw_buf_index, CopyFromStateData::raw_buf_len, RAW_BUF_SIZE, CopyFromStateData::raw_fields, CopyFromStateData::raw_reached_eof, ReceiveCopyBegin(), ReceiveCopyBinaryHeader(), CopyFromStateData::rel, RelationGetDescr, RelationGetRelationName, RelationGetRelid, CopyFromStateData::relname_only, CopyFromStateData::rteperminfos, S_ISDIR, stat::st_mode, stat::st_size, TupleDescAttr, CopyFromStateData::typioparams, CopyFromStateData::volatile_defexprs, CopyFromStateData::whereClause, and whereToSendOutput.

Referenced by copy_table(), DoCopy(), file_acquire_sample_rows(), fileBeginForeignScan(), and fileReScanForeignScan().

◆ BeginCopyTo()

CopyToState BeginCopyTo ( ParseState pstate,
Relation  rel,
RawStmt raw_query,
Oid  queryRelId,
const char *  filename,
bool  is_program,
copy_data_dest_cb  data_dest_cb,
List attnamelist,
List options 
)

Definition at line 357 of file copyto.c.

366 {
367  CopyToState cstate;
368  bool pipe = (filename == NULL && data_dest_cb == NULL);
369  TupleDesc tupDesc;
370  int num_phys_attrs;
371  MemoryContext oldcontext;
372  const int progress_cols[] = {
375  };
376  int64 progress_vals[] = {
378  0
379  };
380 
381  if (rel != NULL && rel->rd_rel->relkind != RELKIND_RELATION)
382  {
383  if (rel->rd_rel->relkind == RELKIND_VIEW)
384  ereport(ERROR,
385  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
386  errmsg("cannot copy from view \"%s\"",
388  errhint("Try the COPY (SELECT ...) TO variant.")));
389  else if (rel->rd_rel->relkind == RELKIND_MATVIEW)
390  ereport(ERROR,
391  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
392  errmsg("cannot copy from materialized view \"%s\"",
394  errhint("Try the COPY (SELECT ...) TO variant.")));
395  else if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
396  ereport(ERROR,
397  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
398  errmsg("cannot copy from foreign table \"%s\"",
400  errhint("Try the COPY (SELECT ...) TO variant.")));
401  else if (rel->rd_rel->relkind == RELKIND_SEQUENCE)
402  ereport(ERROR,
403  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
404  errmsg("cannot copy from sequence \"%s\"",
405  RelationGetRelationName(rel))));
406  else if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
407  ereport(ERROR,
408  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
409  errmsg("cannot copy from partitioned table \"%s\"",
411  errhint("Try the COPY (SELECT ...) TO variant.")));
412  else
413  ereport(ERROR,
414  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
415  errmsg("cannot copy from non-table relation \"%s\"",
416  RelationGetRelationName(rel))));
417  }
418 
419 
420  /* Allocate workspace and zero all fields */
421  cstate = (CopyToStateData *) palloc0(sizeof(CopyToStateData));
422 
423  /*
424  * We allocate everything used by a cstate in a new memory context. This
425  * avoids memory leaks during repeated use of COPY in a query.
426  */
428  "COPY",
430 
431  oldcontext = MemoryContextSwitchTo(cstate->copycontext);
432 
433  /* Extract options from the statement node tree */
434  ProcessCopyOptions(pstate, &cstate->opts, false /* is_from */ , options);
435 
436  /* Process the source/target relation or query */
437  if (rel)
438  {
439  Assert(!raw_query);
440 
441  cstate->rel = rel;
442 
443  tupDesc = RelationGetDescr(cstate->rel);
444  }
445  else
446  {
447  List *rewritten;
448  Query *query;
449  PlannedStmt *plan;
451 
452  cstate->rel = NULL;
453 
454  /*
455  * Run parse analysis and rewrite. Note this also acquires sufficient
456  * locks on the source table(s).
457  */
458  rewritten = pg_analyze_and_rewrite_fixedparams(raw_query,
459  pstate->p_sourcetext, NULL, 0,
460  NULL);
461 
462  /* check that we got back something we can work with */
463  if (rewritten == NIL)
464  {
465  ereport(ERROR,
466  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
467  errmsg("DO INSTEAD NOTHING rules are not supported for COPY")));
468  }
469  else if (list_length(rewritten) > 1)
470  {
471  ListCell *lc;
472 
473  /* examine queries to determine which error message to issue */
474  foreach(lc, rewritten)
475  {
476  Query *q = lfirst_node(Query, lc);
477 
479  ereport(ERROR,
480  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
481  errmsg("conditional DO INSTEAD rules are not supported for COPY")));
483  ereport(ERROR,
484  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
485  errmsg("DO ALSO rules are not supported for the COPY")));
486  }
487 
488  ereport(ERROR,
489  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
490  errmsg("multi-statement DO INSTEAD rules are not supported for COPY")));
491  }
492 
493  query = linitial_node(Query, rewritten);
494 
495  /* The grammar allows SELECT INTO, but we don't support that */
496  if (query->utilityStmt != NULL &&
498  ereport(ERROR,
499  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
500  errmsg("COPY (SELECT INTO) is not supported")));
501 
502  Assert(query->utilityStmt == NULL);
503 
504  /*
505  * Similarly the grammar doesn't enforce the presence of a RETURNING
506  * clause, but this is required here.
507  */
508  if (query->commandType != CMD_SELECT &&
509  query->returningList == NIL)
510  {
511  Assert(query->commandType == CMD_INSERT ||
512  query->commandType == CMD_UPDATE ||
513  query->commandType == CMD_DELETE);
514 
515  ereport(ERROR,
516  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
517  errmsg("COPY query must have a RETURNING clause")));
518  }
519 
520  /* plan the query */
521  plan = pg_plan_query(query, pstate->p_sourcetext,
522  CURSOR_OPT_PARALLEL_OK, NULL);
523 
524  /*
525  * With row-level security and a user using "COPY relation TO", we
526  * have to convert the "COPY relation TO" to a query-based COPY (eg:
527  * "COPY (SELECT * FROM relation) TO"), to allow the rewriter to add
528  * in any RLS clauses.
529  *
530  * When this happens, we are passed in the relid of the originally
531  * found relation (which we have locked). As the planner will look up
532  * the relation again, we double-check here to make sure it found the
533  * same one that we have locked.
534  */
535  if (queryRelId != InvalidOid)
536  {
537  /*
538  * Note that with RLS involved there may be multiple relations,
539  * and while the one we need is almost certainly first, we don't
540  * make any guarantees of that in the planner, so check the whole
541  * list and make sure we find the original relation.
542  */
543  if (!list_member_oid(plan->relationOids, queryRelId))
544  ereport(ERROR,
545  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
546  errmsg("relation referenced by COPY statement has changed")));
547  }
548 
549  /*
550  * Use a snapshot with an updated command ID to ensure this query sees
551  * results of any previously executed queries.
552  */
555 
556  /* Create dest receiver for COPY OUT */
558  ((DR_copy *) dest)->cstate = cstate;
559 
560  /* Create a QueryDesc requesting no output */
561  cstate->queryDesc = CreateQueryDesc(plan, pstate->p_sourcetext,
564  dest, NULL, NULL, 0);
565 
566  /*
567  * Call ExecutorStart to prepare the plan for execution.
568  *
569  * ExecutorStart computes a result tupdesc for us
570  */
571  ExecutorStart(cstate->queryDesc, 0);
572 
573  tupDesc = cstate->queryDesc->tupDesc;
574  }
575 
576  /* Generate or convert list of attributes to process */
577  cstate->attnumlist = CopyGetAttnums(tupDesc, cstate->rel, attnamelist);
578 
579  num_phys_attrs = tupDesc->natts;
580 
581  /* Convert FORCE_QUOTE name list to per-column flags, check validity */
582  cstate->opts.force_quote_flags = (bool *) palloc0(num_phys_attrs * sizeof(bool));
583  if (cstate->opts.force_quote_all)
584  {
585  int i;
586 
587  for (i = 0; i < num_phys_attrs; i++)
588  cstate->opts.force_quote_flags[i] = true;
589  }
590  else if (cstate->opts.force_quote)
591  {
592  List *attnums;
593  ListCell *cur;
594 
595  attnums = CopyGetAttnums(tupDesc, cstate->rel, cstate->opts.force_quote);
596 
597  foreach(cur, attnums)
598  {
599  int attnum = lfirst_int(cur);
600  Form_pg_attribute attr = TupleDescAttr(tupDesc, attnum - 1);
601 
602  if (!list_member_int(cstate->attnumlist, attnum))
603  ereport(ERROR,
604  (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
605  errmsg("FORCE_QUOTE column \"%s\" not referenced by COPY",
606  NameStr(attr->attname))));
607  cstate->opts.force_quote_flags[attnum - 1] = true;
608  }
609  }
610 
611  /* Use client encoding when ENCODING option is not specified. */
612  if (cstate->opts.file_encoding < 0)
614  else
615  cstate->file_encoding = cstate->opts.file_encoding;
616 
617  /*
618  * Set up encoding conversion info. Even if the file and server encodings
619  * are the same, we must apply pg_any_to_server() to validate data in
620  * multibyte encodings.
621  */
622  cstate->need_transcoding =
623  (cstate->file_encoding != GetDatabaseEncoding() ||
625  /* See Multibyte encoding comment above */
627 
628  cstate->copy_dest = COPY_FILE; /* default */
629 
630  if (data_dest_cb)
631  {
632  progress_vals[1] = PROGRESS_COPY_TYPE_CALLBACK;
633  cstate->copy_dest = COPY_CALLBACK;
634  cstate->data_dest_cb = data_dest_cb;
635  }
636  else if (pipe)
637  {
638  progress_vals[1] = PROGRESS_COPY_TYPE_PIPE;
639 
640  Assert(!is_program); /* the grammar does not allow this */
642  cstate->copy_file = stdout;
643  }
644  else
645  {
646  cstate->filename = pstrdup(filename);
647  cstate->is_program = is_program;
648 
649  if (is_program)
650  {
651  progress_vals[1] = PROGRESS_COPY_TYPE_PROGRAM;
652  cstate->copy_file = OpenPipeStream(cstate->filename, PG_BINARY_W);
653  if (cstate->copy_file == NULL)
654  ereport(ERROR,
656  errmsg("could not execute command \"%s\": %m",
657  cstate->filename)));
658  }
659  else
660  {
661  mode_t oumask; /* Pre-existing umask value */
662  struct stat st;
663 
664  progress_vals[1] = PROGRESS_COPY_TYPE_FILE;
665 
666  /*
667  * Prevent write to relative path ... too easy to shoot oneself in
668  * the foot by overwriting a database file ...
669  */
671  ereport(ERROR,
672  (errcode(ERRCODE_INVALID_NAME),
673  errmsg("relative path not allowed for COPY to file")));
674 
675  oumask = umask(S_IWGRP | S_IWOTH);
676  PG_TRY();
677  {
678  cstate->copy_file = AllocateFile(cstate->filename, PG_BINARY_W);
679  }
680  PG_FINALLY();
681  {
682  umask(oumask);
683  }
684  PG_END_TRY();
685  if (cstate->copy_file == NULL)
686  {
687  /* copy errno because ereport subfunctions might change it */
688  int save_errno = errno;
689 
690  ereport(ERROR,
692  errmsg("could not open file \"%s\" for writing: %m",
693  cstate->filename),
694  (save_errno == ENOENT || save_errno == EACCES) ?
695  errhint("COPY TO instructs the PostgreSQL server process to write a file. "
696  "You may want a client-side facility such as psql's \\copy.") : 0));
697  }
698 
699  if (fstat(fileno(cstate->copy_file), &st))
700  ereport(ERROR,
702  errmsg("could not stat file \"%s\": %m",
703  cstate->filename)));
704 
705  if (S_ISDIR(st.st_mode))
706  ereport(ERROR,
707  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
708  errmsg("\"%s\" is a directory", cstate->filename)));
709  }
710  }
711 
712  /* initialize progress */
714  cstate->rel ? RelationGetRelid(cstate->rel) : InvalidOid);
715  pgstat_progress_update_multi_param(2, progress_cols, progress_vals);
716 
717  cstate->bytes_processed = 0;
718 
719  MemoryContextSwitchTo(oldcontext);
720 
721  return cstate;
722 }
#define PG_BINARY_W
Definition: c.h:1212
DestReceiver * CreateDestReceiver(CommandDest dest)
Definition: dest.c:113
@ DestCopyOut
Definition: dest.h:97
#define PG_TRY(...)
Definition: elog.h:309
#define PG_END_TRY(...)
Definition: elog.h:334
#define PG_FINALLY(...)
Definition: elog.h:326
void ExecutorStart(QueryDesc *queryDesc, int eflags)
Definition: execMain.c:132
int i
Definition: isn.c:73
bool list_member_oid(const List *list, Oid datum)
Definition: list.c:721
int pg_database_encoding_max_length(void)
Definition: mbutils.c:1495
#define IsA(nodeptr, _type_)
Definition: nodes.h:168
@ CMD_INSERT
Definition: nodes.h:267
@ CMD_DELETE
Definition: nodes.h:268
@ CMD_UPDATE
Definition: nodes.h:266
@ CMD_SELECT
Definition: nodes.h:265
@ QSRC_NON_INSTEAD_RULE
Definition: parsenodes.h:47
@ QSRC_QUAL_INSTEAD_RULE
Definition: parsenodes.h:46
#define CURSOR_OPT_PARALLEL_OK
Definition: parsenodes.h:2934
#define lfirst_node(type, lc)
Definition: pg_list.h:174
#define linitial_node(type, l)
Definition: pg_list.h:179
#define NIL
Definition: pg_list.h:66
#define PG_ENCODING_IS_CLIENT_ONLY(_enc)
Definition: pg_wchar.h:284
#define is_absolute_path(filename)
Definition: port.h:103
List * pg_analyze_and_rewrite_fixedparams(RawStmt *parsetree, const char *query_string, const Oid *paramTypes, int numParams, QueryEnvironment *queryEnv)
Definition: postgres.c:638
PlannedStmt * pg_plan_query(Query *querytree, const char *query_string, int cursorOptions, ParamListInfo boundParams)
Definition: postgres.c:853
QueryDesc * CreateQueryDesc(PlannedStmt *plannedstmt, const char *sourceText, Snapshot snapshot, Snapshot crosscheck_snapshot, DestReceiver *dest, ParamListInfo params, QueryEnvironment *queryEnv, int instrument_options)
Definition: pquery.c:67
#define PROGRESS_COPY_COMMAND_TO
Definition: progress.h:146
void UpdateActiveSnapshotCommandId(void)
Definition: snapmgr.c:747
void PushCopiedSnapshot(Snapshot snapshot)
Definition: snapmgr.c:735
Snapshot GetActiveSnapshot(void)
Definition: snapmgr.c:805
#define InvalidSnapshot
Definition: snapshot.h:123
bool force_quote_all
Definition: copy.h:54
List * force_quote
Definition: copy.h:53
bool * force_quote_flags
Definition: copy.h:55
MemoryContext copycontext
Definition: copyto.c:97
Relation rel
Definition: copyto.c:84
copy_data_dest_cb data_dest_cb
Definition: copyto.c:89
bool encoding_embeds_ascii
Definition: copyto.c:81
CopyDest copy_dest
Definition: copyto.c:75
bool need_transcoding
Definition: copyto.c:80
bool is_program
Definition: copyto.c:88
FILE * copy_file
Definition: copyto.c:76
int file_encoding
Definition: copyto.c:79
CopyFormatOptions opts
Definition: copyto.c:91
uint64 bytes_processed
Definition: copyto.c:101
char * filename
Definition: copyto.c:87
List * attnumlist
Definition: copyto.c:86
QueryDesc * queryDesc
Definition: copyto.c:85
const char * p_sourcetext
Definition: parse_node.h:185
List * relationOids
Definition: plannodes.h:93
TupleDesc tupDesc
Definition: execdesc.h:47
List * returningList
Definition: parsenodes.h:170
QuerySource querySource
Definition: parsenodes.h:126
CmdType commandType
Definition: parsenodes.h:124
Node * utilityStmt
Definition: parsenodes.h:136
Form_pg_class rd_rel
Definition: rel.h:110
#define S_IWOTH
Definition: win32_port.h:318
#define S_IWGRP
Definition: win32_port.h:306

References AllocateFile(), ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, Assert(), attnum, CopyToStateData::attnumlist, CopyToStateData::bytes_processed, CMD_DELETE, CMD_INSERT, CMD_SELECT, CMD_UPDATE, Query::commandType, COPY_CALLBACK, CopyToStateData::copy_dest, COPY_FILE, CopyToStateData::copy_file, CopyToStateData::copycontext, CopyGetAttnums(), CreateDestReceiver(), CreateQueryDesc(), cur, CurrentMemoryContext, CURSOR_OPT_PARALLEL_OK, CopyToStateData::data_dest_cb, generate_unaccent_rules::dest, DestCopyOut, DestRemote, CopyToStateData::encoding_embeds_ascii, ereport, errcode(), errcode_for_file_access(), errhint(), errmsg(), ERROR, ExecutorStart(), CopyToStateData::file_encoding, CopyFormatOptions::file_encoding, CopyToStateData::filename, filename, CopyFormatOptions::force_quote, CopyFormatOptions::force_quote_all, CopyFormatOptions::force_quote_flags, fstat, GetActiveSnapshot(), GetDatabaseEncoding(), i, InvalidOid, InvalidSnapshot, is_absolute_path, CopyToStateData::is_program, IsA, lfirst_int, lfirst_node, linitial_node, list_length(), list_member_int(), list_member_oid(), MemoryContextSwitchTo(), NameStr, TupleDescData::natts, CopyToStateData::need_transcoding, NIL, OpenPipeStream(), CopyToStateData::opts, ParseState::p_sourcetext, palloc0(), pg_analyze_and_rewrite_fixedparams(), PG_BINARY_W, pg_database_encoding_max_length(), PG_ENCODING_IS_CLIENT_ONLY, PG_END_TRY, PG_FINALLY, pg_get_client_encoding(), pg_plan_query(), PG_TRY, pgstat_progress_start_command(), pgstat_progress_update_multi_param(), ProcessCopyOptions(), PROGRESS_COMMAND_COPY, PROGRESS_COPY_COMMAND, PROGRESS_COPY_COMMAND_TO, PROGRESS_COPY_TYPE, PROGRESS_COPY_TYPE_CALLBACK, PROGRESS_COPY_TYPE_FILE, PROGRESS_COPY_TYPE_PIPE, PROGRESS_COPY_TYPE_PROGRAM, pstrdup(), PushCopiedSnapshot(), QSRC_NON_INSTEAD_RULE, QSRC_QUAL_INSTEAD_RULE, CopyToStateData::queryDesc, Query::querySource, RelationData::rd_rel, CopyToStateData::rel, RelationGetDescr, RelationGetRelationName, RelationGetRelid, PlannedStmt::relationOids, Query::returningList, S_ISDIR, S_IWGRP, S_IWOTH, stat::st_mode, generate_unaccent_rules::stdout, QueryDesc::tupDesc, TupleDescAttr, UpdateActiveSnapshotCommandId(), Query::utilityStmt, and whereToSendOutput.

Referenced by DoCopy(), and test_copy_to_callback().

◆ CopyFrom()

uint64 CopyFrom ( CopyFromState  cstate)

Definition at line 632 of file copyfrom.c.

633 {
634  ResultRelInfo *resultRelInfo;
635  ResultRelInfo *target_resultRelInfo;
636  ResultRelInfo *prevResultRelInfo = NULL;
637  EState *estate = CreateExecutorState(); /* for ExecConstraints() */
638  ModifyTableState *mtstate;
639  ExprContext *econtext;
640  TupleTableSlot *singleslot = NULL;
641  MemoryContext oldcontext = CurrentMemoryContext;
642 
643  PartitionTupleRouting *proute = NULL;
644  ErrorContextCallback errcallback;
645  CommandId mycid = GetCurrentCommandId(true);
646  int ti_options = 0; /* start with default options for insert */
647  BulkInsertState bistate = NULL;
648  CopyInsertMethod insertMethod;
649  CopyMultiInsertInfo multiInsertInfo = {0}; /* pacify compiler */
650  int64 processed = 0;
651  int64 excluded = 0;
652  bool has_before_insert_row_trig;
653  bool has_instead_insert_row_trig;
654  bool leafpart_use_multi_insert = false;
655 
656  Assert(cstate->rel);
657  Assert(list_length(cstate->range_table) == 1);
658 
659  /*
660  * The target must be a plain, foreign, or partitioned relation, or have
661  * an INSTEAD OF INSERT row trigger. (Currently, such triggers are only
662  * allowed on views, so we only hint about them in the view case.)
663  */
664  if (cstate->rel->rd_rel->relkind != RELKIND_RELATION &&
665  cstate->rel->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
666  cstate->rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE &&
667  !(cstate->rel->trigdesc &&
669  {
670  if (cstate->rel->rd_rel->relkind == RELKIND_VIEW)
671  ereport(ERROR,
672  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
673  errmsg("cannot copy to view \"%s\"",
674  RelationGetRelationName(cstate->rel)),
675  errhint("To enable copying to a view, provide an INSTEAD OF INSERT trigger.")));
676  else if (cstate->rel->rd_rel->relkind == RELKIND_MATVIEW)
677  ereport(ERROR,
678  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
679  errmsg("cannot copy to materialized view \"%s\"",
680  RelationGetRelationName(cstate->rel))));
681  else if (cstate->rel->rd_rel->relkind == RELKIND_SEQUENCE)
682  ereport(ERROR,
683  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
684  errmsg("cannot copy to sequence \"%s\"",
685  RelationGetRelationName(cstate->rel))));
686  else
687  ereport(ERROR,
688  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
689  errmsg("cannot copy to non-table relation \"%s\"",
690  RelationGetRelationName(cstate->rel))));
691  }
692 
693  /*
694  * If the target file is new-in-transaction, we assume that checking FSM
695  * for free space is a waste of time. This could possibly be wrong, but
696  * it's unlikely.
697  */
698  if (RELKIND_HAS_STORAGE(cstate->rel->rd_rel->relkind) &&
701  ti_options |= TABLE_INSERT_SKIP_FSM;
702 
703  /*
704  * Optimize if new relation storage was created in this subxact or one of
705  * its committed children and we won't see those rows later as part of an
706  * earlier scan or command. The subxact test ensures that if this subxact
707  * aborts then the frozen rows won't be visible after xact cleanup. Note
708  * that the stronger test of exactly which subtransaction created it is
709  * crucial for correctness of this optimization. The test for an earlier
710  * scan or command tolerates false negatives. FREEZE causes other sessions
711  * to see rows they would not see under MVCC, and a false negative merely
712  * spreads that anomaly to the current session.
713  */
714  if (cstate->opts.freeze)
715  {
716  /*
717  * We currently disallow COPY FREEZE on partitioned tables. The
718  * reason for this is that we've simply not yet opened the partitions
719  * to determine if the optimization can be applied to them. We could
720  * go and open them all here, but doing so may be quite a costly
721  * overhead for small copies. In any case, we may just end up routing
722  * tuples to a small number of partitions. It seems better just to
723  * raise an ERROR for partitioned tables.
724  */
725  if (cstate->rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
726  {
727  ereport(ERROR,
728  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
729  errmsg("cannot perform COPY FREEZE on a partitioned table")));
730  }
731 
732  /*
733  * Tolerate one registration for the benefit of FirstXactSnapshot.
734  * Scan-bearing queries generally create at least two registrations,
735  * though relying on that is fragile, as is ignoring ActiveSnapshot.
736  * Clear CatalogSnapshot to avoid counting its registration. We'll
737  * still detect ongoing catalog scans, each of which separately
738  * registers the snapshot it uses.
739  */
742  ereport(ERROR,
743  (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
744  errmsg("cannot perform COPY FREEZE because of prior transaction activity")));
745 
746  if (cstate->rel->rd_createSubid != GetCurrentSubTransactionId() &&
748  ereport(ERROR,
749  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
750  errmsg("cannot perform COPY FREEZE because the table was not created or truncated in the current subtransaction")));
751 
752  ti_options |= TABLE_INSERT_FROZEN;
753  }
754 
755  /*
756  * We need a ResultRelInfo so we can use the regular executor's
757  * index-entry-making machinery. (There used to be a huge amount of code
758  * here that basically duplicated execUtils.c ...)
759  */
760  ExecInitRangeTable(estate, cstate->range_table);
761  resultRelInfo = target_resultRelInfo = makeNode(ResultRelInfo);
762  ExecInitResultRelation(estate, resultRelInfo, 1);
763 
764  /*
765  * Copy the RTEPermissionInfos into estate as well, so that
766  * ExecGetInsertedCols() et al will work correctly.
767  */
768  estate->es_rteperminfos = cstate->rteperminfos;
769 
770  /* Verify the named relation is a valid target for INSERT */
771  CheckValidResultRel(resultRelInfo, CMD_INSERT);
772 
773  ExecOpenIndices(resultRelInfo, false);
774 
775  /*
776  * Set up a ModifyTableState so we can let FDW(s) init themselves for
777  * foreign-table result relation(s).
778  */
779  mtstate = makeNode(ModifyTableState);
780  mtstate->ps.plan = NULL;
781  mtstate->ps.state = estate;
782  mtstate->operation = CMD_INSERT;
783  mtstate->mt_nrels = 1;
784  mtstate->resultRelInfo = resultRelInfo;
785  mtstate->rootResultRelInfo = resultRelInfo;
786 
787  if (resultRelInfo->ri_FdwRoutine != NULL &&
788  resultRelInfo->ri_FdwRoutine->BeginForeignInsert != NULL)
789  resultRelInfo->ri_FdwRoutine->BeginForeignInsert(mtstate,
790  resultRelInfo);
791 
792  /*
793  * Also, if the named relation is a foreign table, determine if the FDW
794  * supports batch insert and determine the batch size (a FDW may support
795  * batching, but it may be disabled for the server/table).
796  *
797  * If the FDW does not support batching, we set the batch size to 1.
798  */
799  if (resultRelInfo->ri_FdwRoutine != NULL &&
800  resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize &&
801  resultRelInfo->ri_FdwRoutine->ExecForeignBatchInsert)
802  resultRelInfo->ri_BatchSize =
803  resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize(resultRelInfo);
804  else
805  resultRelInfo->ri_BatchSize = 1;
806 
807  Assert(resultRelInfo->ri_BatchSize >= 1);
808 
809  /* Prepare to catch AFTER triggers. */
811 
812  /*
813  * If there are any triggers with transition tables on the named relation,
814  * we need to be prepared to capture transition tuples.
815  *
816  * Because partition tuple routing would like to know about whether
817  * transition capture is active, we also set it in mtstate, which is
818  * passed to ExecFindPartition() below.
819  */
820  cstate->transition_capture = mtstate->mt_transition_capture =
822  RelationGetRelid(cstate->rel),
823  CMD_INSERT);
824 
825  /*
826  * If the named relation is a partitioned table, initialize state for
827  * CopyFrom tuple routing.
828  */
829  if (cstate->rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
830  proute = ExecSetupPartitionTupleRouting(estate, cstate->rel);
831 
832  if (cstate->whereClause)
833  cstate->qualexpr = ExecInitQual(castNode(List, cstate->whereClause),
834  &mtstate->ps);
835 
836  /*
837  * It's generally more efficient to prepare a bunch of tuples for
838  * insertion, and insert them in one
839  * table_multi_insert()/ExecForeignBatchInsert() call, than call
840  * table_tuple_insert()/ExecForeignInsert() separately for every tuple.
841  * However, there are a number of reasons why we might not be able to do
842  * this. These are explained below.
843  */
844  if (resultRelInfo->ri_TrigDesc != NULL &&
845  (resultRelInfo->ri_TrigDesc->trig_insert_before_row ||
846  resultRelInfo->ri_TrigDesc->trig_insert_instead_row))
847  {
848  /*
849  * Can't support multi-inserts when there are any BEFORE/INSTEAD OF
850  * triggers on the table. Such triggers might query the table we're
851  * inserting into and act differently if the tuples that have already
852  * been processed and prepared for insertion are not there.
853  */
854  insertMethod = CIM_SINGLE;
855  }
856  else if (resultRelInfo->ri_FdwRoutine != NULL &&
857  resultRelInfo->ri_BatchSize == 1)
858  {
859  /*
860  * Can't support multi-inserts to a foreign table if the FDW does not
861  * support batching, or it's disabled for the server or foreign table.
862  */
863  insertMethod = CIM_SINGLE;
864  }
865  else if (proute != NULL && resultRelInfo->ri_TrigDesc != NULL &&
866  resultRelInfo->ri_TrigDesc->trig_insert_new_table)
867  {
868  /*
869  * For partitioned tables we can't support multi-inserts when there
870  * are any statement level insert triggers. It might be possible to
871  * allow partitioned tables with such triggers in the future, but for
872  * now, CopyMultiInsertInfoFlush expects that any after row insert and
873  * statement level insert triggers are on the same relation.
874  */
875  insertMethod = CIM_SINGLE;
876  }
877  else if (cstate->volatile_defexprs)
878  {
879  /*
880  * Can't support multi-inserts if there are any volatile default
881  * expressions in the table. Similarly to the trigger case above,
882  * such expressions may query the table we're inserting into.
883  *
884  * Note: It does not matter if any partitions have any volatile
885  * default expressions as we use the defaults from the target of the
886  * COPY command.
887  */
888  insertMethod = CIM_SINGLE;
889  }
890  else if (contain_volatile_functions(cstate->whereClause))
891  {
892  /*
893  * Can't support multi-inserts if there are any volatile function
894  * expressions in WHERE clause. Similarly to the trigger case above,
895  * such expressions may query the table we're inserting into.
896  */
897  insertMethod = CIM_SINGLE;
898  }
899  else
900  {
901  /*
902  * For partitioned tables, we may still be able to perform bulk
903  * inserts. However, the possibility of this depends on which types
904  * of triggers exist on the partition. We must disable bulk inserts
905  * if the partition is a foreign table that can't use batching or it
906  * has any before row insert or insert instead triggers (same as we
907  * checked above for the parent table). Since the partition's
908  * resultRelInfos are initialized only when we actually need to insert
909  * the first tuple into them, we must have the intermediate insert
910  * method of CIM_MULTI_CONDITIONAL to flag that we must later
911  * determine if we can use bulk-inserts for the partition being
912  * inserted into.
913  */
914  if (proute)
915  insertMethod = CIM_MULTI_CONDITIONAL;
916  else
917  insertMethod = CIM_MULTI;
918 
919  CopyMultiInsertInfoInit(&multiInsertInfo, resultRelInfo, cstate,
920  estate, mycid, ti_options);
921  }
922 
923  /*
924  * If not using batch mode (which allocates slots as needed) set up a
925  * tuple slot too. When inserting into a partitioned table, we also need
926  * one, even if we might batch insert, to read the tuple in the root
927  * partition's form.
928  */
929  if (insertMethod == CIM_SINGLE || insertMethod == CIM_MULTI_CONDITIONAL)
930  {
931  singleslot = table_slot_create(resultRelInfo->ri_RelationDesc,
932  &estate->es_tupleTable);
933  bistate = GetBulkInsertState();
934  }
935 
936  has_before_insert_row_trig = (resultRelInfo->ri_TrigDesc &&
937  resultRelInfo->ri_TrigDesc->trig_insert_before_row);
938 
939  has_instead_insert_row_trig = (resultRelInfo->ri_TrigDesc &&
940  resultRelInfo->ri_TrigDesc->trig_insert_instead_row);
941 
942  /*
943  * Check BEFORE STATEMENT insertion triggers. It's debatable whether we
944  * should do this for COPY, since it's not really an "INSERT" statement as
945  * such. However, executing these triggers maintains consistency with the
946  * EACH ROW triggers that we already fire on COPY.
947  */
948  ExecBSInsertTriggers(estate, resultRelInfo);
949 
950  econtext = GetPerTupleExprContext(estate);
951 
952  /* Set up callback to identify error line number */
953  errcallback.callback = CopyFromErrorCallback;
954  errcallback.arg = (void *) cstate;
955  errcallback.previous = error_context_stack;
956  error_context_stack = &errcallback;
957 
958  for (;;)
959  {
960  TupleTableSlot *myslot;
961  bool skip_tuple;
962 
964 
965  /*
966  * Reset the per-tuple exprcontext. We do this after every tuple, to
967  * clean-up after expression evaluations etc.
968  */
969  ResetPerTupleExprContext(estate);
970 
971  /* select slot to (initially) load row into */
972  if (insertMethod == CIM_SINGLE || proute)
973  {
974  myslot = singleslot;
975  Assert(myslot != NULL);
976  }
977  else
978  {
979  Assert(resultRelInfo == target_resultRelInfo);
980  Assert(insertMethod == CIM_MULTI);
981 
982  myslot = CopyMultiInsertInfoNextFreeSlot(&multiInsertInfo,
983  resultRelInfo);
984  }
985 
986  /*
987  * Switch to per-tuple context before calling NextCopyFrom, which does
988  * evaluate default expressions etc. and requires per-tuple context.
989  */
991 
992  ExecClearTuple(myslot);
993 
994  /* Directly store the values/nulls array in the slot */
995  if (!NextCopyFrom(cstate, econtext, myslot->tts_values, myslot->tts_isnull))
996  break;
997 
998  ExecStoreVirtualTuple(myslot);
999 
1000  /*
1001  * Constraints and where clause might reference the tableoid column,
1002  * so (re-)initialize tts_tableOid before evaluating them.
1003  */
1004  myslot->tts_tableOid = RelationGetRelid(target_resultRelInfo->ri_RelationDesc);
1005 
1006  /* Triggers and stuff need to be invoked in query context. */
1007  MemoryContextSwitchTo(oldcontext);
1008 
1009  if (cstate->whereClause)
1010  {
1011  econtext->ecxt_scantuple = myslot;
1012  /* Skip items that don't match COPY's WHERE clause */
1013  if (!ExecQual(cstate->qualexpr, econtext))
1014  {
1015  /*
1016  * Report that this tuple was filtered out by the WHERE
1017  * clause.
1018  */
1020  ++excluded);
1021  continue;
1022  }
1023  }
1024 
1025  /* Determine the partition to insert the tuple into */
1026  if (proute)
1027  {
1028  TupleConversionMap *map;
1029 
1030  /*
1031  * Attempt to find a partition suitable for this tuple.
1032  * ExecFindPartition() will raise an error if none can be found or
1033  * if the found partition is not suitable for INSERTs.
1034  */
1035  resultRelInfo = ExecFindPartition(mtstate, target_resultRelInfo,
1036  proute, myslot, estate);
1037 
1038  if (prevResultRelInfo != resultRelInfo)
1039  {
1040  /* Determine which triggers exist on this partition */
1041  has_before_insert_row_trig = (resultRelInfo->ri_TrigDesc &&
1042  resultRelInfo->ri_TrigDesc->trig_insert_before_row);
1043 
1044  has_instead_insert_row_trig = (resultRelInfo->ri_TrigDesc &&
1045  resultRelInfo->ri_TrigDesc->trig_insert_instead_row);
1046 
1047  /*
1048  * Disable multi-inserts when the partition has BEFORE/INSTEAD
1049  * OF triggers, or if the partition is a foreign table that
1050  * can't use batching.
1051  */
1052  leafpart_use_multi_insert = insertMethod == CIM_MULTI_CONDITIONAL &&
1053  !has_before_insert_row_trig &&
1054  !has_instead_insert_row_trig &&
1055  (resultRelInfo->ri_FdwRoutine == NULL ||
1056  resultRelInfo->ri_BatchSize > 1);
1057 
1058  /* Set the multi-insert buffer to use for this partition. */
1059  if (leafpart_use_multi_insert)
1060  {
1061  if (resultRelInfo->ri_CopyMultiInsertBuffer == NULL)
1062  CopyMultiInsertInfoSetupBuffer(&multiInsertInfo,
1063  resultRelInfo);
1064  }
1065  else if (insertMethod == CIM_MULTI_CONDITIONAL &&
1066  !CopyMultiInsertInfoIsEmpty(&multiInsertInfo))
1067  {
1068  /*
1069  * Flush pending inserts if this partition can't use
1070  * batching, so rows are visible to triggers etc.
1071  */
1072  CopyMultiInsertInfoFlush(&multiInsertInfo,
1073  resultRelInfo,
1074  &processed);
1075  }
1076 
1077  if (bistate != NULL)
1078  ReleaseBulkInsertStatePin(bistate);
1079  prevResultRelInfo = resultRelInfo;
1080  }
1081 
1082  /*
1083  * If we're capturing transition tuples, we might need to convert
1084  * from the partition rowtype to root rowtype. But if there are no
1085  * BEFORE triggers on the partition that could change the tuple,
1086  * we can just remember the original unconverted tuple to avoid a
1087  * needless round trip conversion.
1088  */
1089  if (cstate->transition_capture != NULL)
1091  !has_before_insert_row_trig ? myslot : NULL;
1092 
1093  /*
1094  * We might need to convert from the root rowtype to the partition
1095  * rowtype.
1096  */
1097  map = ExecGetRootToChildMap(resultRelInfo, estate);
1098  if (insertMethod == CIM_SINGLE || !leafpart_use_multi_insert)
1099  {
1100  /* non batch insert */
1101  if (map != NULL)
1102  {
1103  TupleTableSlot *new_slot;
1104 
1105  new_slot = resultRelInfo->ri_PartitionTupleSlot;
1106  myslot = execute_attr_map_slot(map->attrMap, myslot, new_slot);
1107  }
1108  }
1109  else
1110  {
1111  /*
1112  * Prepare to queue up tuple for later batch insert into
1113  * current partition.
1114  */
1115  TupleTableSlot *batchslot;
1116 
1117  /* no other path available for partitioned table */
1118  Assert(insertMethod == CIM_MULTI_CONDITIONAL);
1119 
1120  batchslot = CopyMultiInsertInfoNextFreeSlot(&multiInsertInfo,
1121  resultRelInfo);
1122 
1123  if (map != NULL)
1124  myslot = execute_attr_map_slot(map->attrMap, myslot,
1125  batchslot);
1126  else
1127  {
1128  /*
1129  * This looks more expensive than it is (Believe me, I
1130  * optimized it away. Twice.). The input is in virtual
1131  * form, and we'll materialize the slot below - for most
1132  * slot types the copy performs the work materialization
1133  * would later require anyway.
1134  */
1135  ExecCopySlot(batchslot, myslot);
1136  myslot = batchslot;
1137  }
1138  }
1139 
1140  /* ensure that triggers etc see the right relation */
1141  myslot->tts_tableOid = RelationGetRelid(resultRelInfo->ri_RelationDesc);
1142  }
1143 
1144  skip_tuple = false;
1145 
1146  /* BEFORE ROW INSERT Triggers */
1147  if (has_before_insert_row_trig)
1148  {
1149  if (!ExecBRInsertTriggers(estate, resultRelInfo, myslot))
1150  skip_tuple = true; /* "do nothing" */
1151  }
1152 
1153  if (!skip_tuple)
1154  {
1155  /*
1156  * If there is an INSTEAD OF INSERT ROW trigger, let it handle the
1157  * tuple. Otherwise, proceed with inserting the tuple into the
1158  * table or foreign table.
1159  */
1160  if (has_instead_insert_row_trig)
1161  {
1162  ExecIRInsertTriggers(estate, resultRelInfo, myslot);
1163  }
1164  else
1165  {
1166  /* Compute stored generated columns */
1167  if (resultRelInfo->ri_RelationDesc->rd_att->constr &&
1169  ExecComputeStoredGenerated(resultRelInfo, estate, myslot,
1170  CMD_INSERT);
1171 
1172  /*
1173  * If the target is a plain table, check the constraints of
1174  * the tuple.
1175  */
1176  if (resultRelInfo->ri_FdwRoutine == NULL &&
1177  resultRelInfo->ri_RelationDesc->rd_att->constr)
1178  ExecConstraints(resultRelInfo, myslot, estate);
1179 
1180  /*
1181  * Also check the tuple against the partition constraint, if
1182  * there is one; except that if we got here via tuple-routing,
1183  * we don't need to if there's no BR trigger defined on the
1184  * partition.
1185  */
1186  if (resultRelInfo->ri_RelationDesc->rd_rel->relispartition &&
1187  (proute == NULL || has_before_insert_row_trig))
1188  ExecPartitionCheck(resultRelInfo, myslot, estate, true);
1189 
1190  /* Store the slot in the multi-insert buffer, when enabled. */
1191  if (insertMethod == CIM_MULTI || leafpart_use_multi_insert)
1192  {
1193  /*
1194  * The slot previously might point into the per-tuple
1195  * context. For batching it needs to be longer lived.
1196  */
1197  ExecMaterializeSlot(myslot);
1198 
1199  /* Add this tuple to the tuple buffer */
1200  CopyMultiInsertInfoStore(&multiInsertInfo,
1201  resultRelInfo, myslot,
1202  cstate->line_buf.len,
1203  cstate->cur_lineno);
1204 
1205  /*
1206  * If enough inserts have queued up, then flush all
1207  * buffers out to their tables.
1208  */
1209  if (CopyMultiInsertInfoIsFull(&multiInsertInfo))
1210  CopyMultiInsertInfoFlush(&multiInsertInfo,
1211  resultRelInfo,
1212  &processed);
1213 
1214  /*
1215  * We delay updating the row counter and progress of the
1216  * COPY command until after writing the tuples stored in
1217  * the buffer out to the table, as in single insert mode.
1218  * See CopyMultiInsertBufferFlush().
1219  */
1220  continue; /* next tuple please */
1221  }
1222  else
1223  {
1224  List *recheckIndexes = NIL;
1225 
1226  /* OK, store the tuple */
1227  if (resultRelInfo->ri_FdwRoutine != NULL)
1228  {
1229  myslot = resultRelInfo->ri_FdwRoutine->ExecForeignInsert(estate,
1230  resultRelInfo,
1231  myslot,
1232  NULL);
1233 
1234  if (myslot == NULL) /* "do nothing" */
1235  continue; /* next tuple please */
1236 
1237  /*
1238  * AFTER ROW Triggers might reference the tableoid
1239  * column, so (re-)initialize tts_tableOid before
1240  * evaluating them.
1241  */
1242  myslot->tts_tableOid = RelationGetRelid(resultRelInfo->ri_RelationDesc);
1243  }
1244  else
1245  {
1246  /* OK, store the tuple and create index entries for it */
1247  table_tuple_insert(resultRelInfo->ri_RelationDesc,
1248  myslot, mycid, ti_options, bistate);
1249 
1250  if (resultRelInfo->ri_NumIndices > 0)
1251  recheckIndexes = ExecInsertIndexTuples(resultRelInfo,
1252  myslot,
1253  estate,
1254  false,
1255  false,
1256  NULL,
1257  NIL);
1258  }
1259 
1260  /* AFTER ROW INSERT Triggers */
1261  ExecARInsertTriggers(estate, resultRelInfo, myslot,
1262  recheckIndexes, cstate->transition_capture);
1263 
1264  list_free(recheckIndexes);
1265  }
1266  }
1267 
1268  /*
1269  * We count only tuples not suppressed by a BEFORE INSERT trigger
1270  * or FDW; this is the same definition used by nodeModifyTable.c
1271  * for counting tuples inserted by an INSERT command. Update
1272  * progress of the COPY command as well.
1273  */
1275  ++processed);
1276  }
1277  }
1278 
1279  /* Flush any remaining buffered tuples */
1280  if (insertMethod != CIM_SINGLE)
1281  {
1282  if (!CopyMultiInsertInfoIsEmpty(&multiInsertInfo))
1283  CopyMultiInsertInfoFlush(&multiInsertInfo, NULL, &processed);
1284  }
1285 
1286  /* Done, clean up */
1287  error_context_stack = errcallback.previous;
1288 
1289  if (bistate != NULL)
1290  FreeBulkInsertState(bistate);
1291 
1292  MemoryContextSwitchTo(oldcontext);
1293 
1294  /* Execute AFTER STATEMENT insertion triggers */
1295  ExecASInsertTriggers(estate, target_resultRelInfo, cstate->transition_capture);
1296 
1297  /* Handle queued AFTER triggers */
1298  AfterTriggerEndQuery(estate);
1299 
1300  ExecResetTupleTable(estate->es_tupleTable, false);
1301 
1302  /* Allow the FDW to shut down */
1303  if (target_resultRelInfo->ri_FdwRoutine != NULL &&
1304  target_resultRelInfo->ri_FdwRoutine->EndForeignInsert != NULL)
1305  target_resultRelInfo->ri_FdwRoutine->EndForeignInsert(estate,
1306  target_resultRelInfo);
1307 
1308  /* Tear down the multi-insert buffer data */
1309  if (insertMethod != CIM_SINGLE)
1310  CopyMultiInsertInfoCleanup(&multiInsertInfo);
1311 
1312  /* Close all the partitioned tables, leaf partitions, and their indices */
1313  if (proute)
1314  ExecCleanupTupleRouting(mtstate, proute);
1315 
1316  /* Close the result relations, including any trigger target relations */
1317  ExecCloseResultRelations(estate);
1319 
1320  FreeExecutorState(estate);
1321 
1322  return processed;
1323 }
void pgstat_progress_update_param(int index, int64 val)
#define InvalidSubTransactionId
Definition: c.h:594
uint32 CommandId
Definition: c.h:602
bool contain_volatile_functions(Node *clause)
Definition: clauses.c:448
static void CopyMultiInsertInfoSetupBuffer(CopyMultiInsertInfo *miinfo, ResultRelInfo *rri)
Definition: copyfrom.c:242
static void CopyMultiInsertInfoInit(CopyMultiInsertInfo *miinfo, ResultRelInfo *rri, CopyFromState cstate, EState *estate, CommandId mycid, int ti_options)
Definition: copyfrom.c:262
static void CopyMultiInsertInfoFlush(CopyMultiInsertInfo *miinfo, ResultRelInfo *curr_rri, int64 *processed)
Definition: copyfrom.c:524
static void CopyMultiInsertInfoStore(CopyMultiInsertInfo *miinfo, ResultRelInfo *rri, TupleTableSlot *slot, int tuplen, uint64 lineno)
Definition: copyfrom.c:609
static void CopyMultiInsertInfoCleanup(CopyMultiInsertInfo *miinfo)
Definition: copyfrom.c:571
static bool CopyMultiInsertInfoIsFull(CopyMultiInsertInfo *miinfo)
Definition: copyfrom.c:287
static TupleTableSlot * CopyMultiInsertInfoNextFreeSlot(CopyMultiInsertInfo *miinfo, ResultRelInfo *rri)
Definition: copyfrom.c:590
static bool CopyMultiInsertInfoIsEmpty(CopyMultiInsertInfo *miinfo)
Definition: copyfrom.c:299
void CopyFromErrorCallback(void *arg)
Definition: copyfrom.c:116
CopyInsertMethod
@ CIM_SINGLE
@ CIM_MULTI_CONDITIONAL
@ CIM_MULTI
bool NextCopyFrom(CopyFromState cstate, ExprContext *econtext, Datum *values, bool *nulls)
ErrorContextCallback * error_context_stack
Definition: elog.c:94
ExprState * ExecInitQual(List *qual, PlanState *parent)
Definition: execExpr.c:210
List * ExecInsertIndexTuples(ResultRelInfo *resultRelInfo, TupleTableSlot *slot, EState *estate, bool update, bool noDupErr, bool *specConflict, List *arbiterIndexes)
Definition: execIndexing.c:284
void ExecOpenIndices(ResultRelInfo *resultRelInfo, bool speculative)
Definition: execIndexing.c:156
bool ExecPartitionCheck(ResultRelInfo *resultRelInfo, TupleTableSlot *slot, EState *estate, bool emitError)
Definition: execMain.c:1779
void ExecCloseResultRelations(EState *estate)
Definition: execMain.c:1504
void ExecCloseRangeTableRelations(EState *estate)
Definition: execMain.c:1564
void ExecConstraints(ResultRelInfo *resultRelInfo, TupleTableSlot *slot, EState *estate)
Definition: execMain.c:1903
void CheckValidResultRel(ResultRelInfo *resultRelInfo, CmdType operation)
Definition: execMain.c:988
ResultRelInfo * ExecFindPartition(ModifyTableState *mtstate, ResultRelInfo *rootResultRelInfo, PartitionTupleRouting *proute, TupleTableSlot *slot, EState *estate)
PartitionTupleRouting * ExecSetupPartitionTupleRouting(EState *estate, Relation rel)
void ExecCleanupTupleRouting(ModifyTableState *mtstate, PartitionTupleRouting *proute)
void ExecResetTupleTable(List *tupleTable, bool shouldFree)
Definition: execTuples.c:1191
TupleTableSlot * ExecStoreVirtualTuple(TupleTableSlot *slot)
Definition: execTuples.c:1552
void ExecInitRangeTable(EState *estate, List *rangeTable)
Definition: execUtils.c:755
void ExecInitResultRelation(EState *estate, ResultRelInfo *resultRelInfo, Index rti)
Definition: execUtils.c:838
EState * CreateExecutorState(void)
Definition: execUtils.c:92
TupleConversionMap * ExecGetRootToChildMap(ResultRelInfo *resultRelInfo, EState *estate)
Definition: execUtils.c:1264
void FreeExecutorState(EState *estate)
Definition: execUtils.c:190
#define ResetPerTupleExprContext(estate)
Definition: executor.h:547
#define GetPerTupleExprContext(estate)
Definition: executor.h:538
#define GetPerTupleMemoryContext(estate)
Definition: executor.h:543
static bool ExecQual(ExprState *state, ExprContext *econtext)
Definition: executor.h:401
void ReleaseBulkInsertStatePin(BulkInsertState bistate)
Definition: heapam.c:2002
BulkInsertState GetBulkInsertState(void)
Definition: heapam.c:1976
void FreeBulkInsertState(BulkInsertState bistate)
Definition: heapam.c:1990
void list_free(List *list)
Definition: list.c:1545
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:121
void ExecComputeStoredGenerated(ResultRelInfo *resultRelInfo, EState *estate, TupleTableSlot *slot, CmdType cmdtype)
#define makeNode(_type_)
Definition: nodes.h:165
#define castNode(_type_, nodeptr)
Definition: nodes.h:186
bool ThereAreNoReadyPortals(void)
Definition: portalmem.c:1169
#define PROGRESS_COPY_TUPLES_PROCESSED
Definition: progress.h:139
#define PROGRESS_COPY_TUPLES_EXCLUDED
Definition: progress.h:140
bool ThereAreNoPriorRegisteredSnapshots(void)
Definition: snapmgr.c:1623
void InvalidateCatalogSnapshot(void)
Definition: snapmgr.c:457
bool freeze
Definition: copy.h:44
TransitionCaptureState * transition_capture
List * es_rteperminfos
Definition: execnodes.h:620
List * es_tupleTable
Definition: execnodes.h:658
struct ErrorContextCallback * previous
Definition: elog.h:234
void(* callback)(void *arg)
Definition: elog.h:235
TupleTableSlot * ecxt_scantuple
Definition: execnodes.h:247
EndForeignInsert_function EndForeignInsert
Definition: fdwapi.h:239
BeginForeignInsert_function BeginForeignInsert
Definition: fdwapi.h:238
ExecForeignInsert_function ExecForeignInsert
Definition: fdwapi.h:232
ExecForeignBatchInsert_function ExecForeignBatchInsert
Definition: fdwapi.h:233
GetForeignModifyBatchSize_function GetForeignModifyBatchSize
Definition: fdwapi.h:234
CmdType operation
Definition: execnodes.h:1258
ResultRelInfo * resultRelInfo
Definition: execnodes.h:1262
PlanState ps
Definition: execnodes.h:1257
ResultRelInfo * rootResultRelInfo
Definition: execnodes.h:1270
struct TransitionCaptureState * mt_transition_capture
Definition: execnodes.h:1296
Plan * plan
Definition: execnodes.h:1030
EState * state
Definition: execnodes.h:1032
SubTransactionId rd_firstRelfilelocatorSubid
Definition: rel.h:105
TriggerDesc * trigdesc
Definition: rel.h:116
TupleDesc rd_att
Definition: rel.h:111
SubTransactionId rd_newRelfilelocatorSubid
Definition: rel.h:103
SubTransactionId rd_createSubid
Definition: rel.h:102
TupleTableSlot * ri_PartitionTupleSlot
Definition: execnodes.h:568
int ri_NumIndices
Definition: execnodes.h:451
Relation ri_RelationDesc
Definition: execnodes.h:448
struct CopyMultiInsertBuffer * ri_CopyMultiInsertBuffer
Definition: execnodes.h:571
TriggerDesc * ri_TrigDesc
Definition: execnodes.h:475
struct FdwRoutine * ri_FdwRoutine
Definition: execnodes.h:492
int ri_BatchSize
Definition: execnodes.h:503
TupleTableSlot * tcs_original_insert_tuple
Definition: trigger.h:76
bool trig_insert_instead_row
Definition: reltrigger.h:58
bool trig_insert_new_table
Definition: reltrigger.h:75
bool trig_insert_before_row
Definition: reltrigger.h:56
bool has_generated_stored
Definition: tupdesc.h:45
AttrMap * attrMap
Definition: tupconvert.h:28
TupleConstr * constr
Definition: tupdesc.h:85
Oid tts_tableOid
Definition: tuptable.h:131
bool * tts_isnull
Definition: tuptable.h:128
Datum * tts_values
Definition: tuptable.h:126
TupleTableSlot * table_slot_create(Relation relation, List **reglist)
Definition: tableam.c:91
#define TABLE_INSERT_FROZEN
Definition: tableam.h:237
#define TABLE_INSERT_SKIP_FSM
Definition: tableam.h:236
static void table_tuple_insert(Relation rel, TupleTableSlot *slot, CommandId cid, int options, struct BulkInsertStateData *bistate)
Definition: tableam.h:1373
void ExecBSInsertTriggers(EState *estate, ResultRelInfo *relinfo)
Definition: trigger.c:2399
bool ExecBRInsertTriggers(EState *estate, ResultRelInfo *relinfo, TupleTableSlot *slot)
Definition: trigger.c:2463
bool ExecIRInsertTriggers(EState *estate, ResultRelInfo *relinfo, TupleTableSlot *slot)
Definition: trigger.c:2556
void ExecARInsertTriggers(EState *estate, ResultRelInfo *relinfo, TupleTableSlot *slot, List *recheckIndexes, TransitionCaptureState *transition_capture)
Definition: trigger.c:2539
TransitionCaptureState * MakeTransitionCaptureState(TriggerDesc *trigdesc, Oid relid, CmdType cmdType)
Definition: trigger.c:4818
void ExecASInsertTriggers(EState *estate, ResultRelInfo *relinfo, TransitionCaptureState *transition_capture)
Definition: trigger.c:2450
void AfterTriggerEndQuery(EState *estate)
Definition: trigger.c:4974
void AfterTriggerBeginQuery(void)
Definition: trigger.c:4954
TupleTableSlot * execute_attr_map_slot(AttrMap *attrMap, TupleTableSlot *in_slot, TupleTableSlot *out_slot)
Definition: tupconvert.c:192
static TupleTableSlot * ExecClearTuple(TupleTableSlot *slot)
Definition: tuptable.h:433
static TupleTableSlot * ExecCopySlot(TupleTableSlot *dstslot, TupleTableSlot *srcslot)
Definition: tuptable.h:483
static void ExecMaterializeSlot(TupleTableSlot *slot)
Definition: tuptable.h:451
SubTransactionId GetCurrentSubTransactionId(void)
Definition: xact.c:779
CommandId GetCurrentCommandId(bool used)
Definition: xact.c:817

References AfterTriggerBeginQuery(), AfterTriggerEndQuery(), ErrorContextCallback::arg, Assert(), TupleConversionMap::attrMap, FdwRoutine::BeginForeignInsert, ErrorContextCallback::callback, castNode, CHECK_FOR_INTERRUPTS, CheckValidResultRel(), CIM_MULTI, CIM_MULTI_CONDITIONAL, CIM_SINGLE, CMD_INSERT, TupleDescData::constr, contain_volatile_functions(), CopyFromErrorCallback(), CopyMultiInsertInfoCleanup(), CopyMultiInsertInfoFlush(), CopyMultiInsertInfoInit(), CopyMultiInsertInfoIsEmpty(), CopyMultiInsertInfoIsFull(), CopyMultiInsertInfoNextFreeSlot(), CopyMultiInsertInfoSetupBuffer(), CopyMultiInsertInfoStore(), CreateExecutorState(), CopyFromStateData::cur_lineno, CurrentMemoryContext, ExprContext::ecxt_scantuple, FdwRoutine::EndForeignInsert, ereport, errcode(), errhint(), errmsg(), ERROR, error_context_stack, EState::es_rteperminfos, EState::es_tupleTable, ExecARInsertTriggers(), ExecASInsertTriggers(), ExecBRInsertTriggers(), ExecBSInsertTriggers(), ExecCleanupTupleRouting(), ExecClearTuple(), ExecCloseRangeTableRelations(), ExecCloseResultRelations(), ExecComputeStoredGenerated(), ExecConstraints(), ExecCopySlot(), ExecFindPartition(), FdwRoutine::ExecForeignBatchInsert, FdwRoutine::ExecForeignInsert, ExecGetRootToChildMap(), ExecInitQual(), ExecInitRangeTable(), ExecInitResultRelation(), ExecInsertIndexTuples(), ExecIRInsertTriggers(), ExecMaterializeSlot(), ExecOpenIndices(), ExecPartitionCheck(), ExecQual(), ExecResetTupleTable(), ExecSetupPartitionTupleRouting(), ExecStoreVirtualTuple(), execute_attr_map_slot(), FreeBulkInsertState(), FreeExecutorState(), CopyFormatOptions::freeze, GetBulkInsertState(), GetCurrentCommandId(), GetCurrentSubTransactionId(), FdwRoutine::GetForeignModifyBatchSize, GetPerTupleExprContext, GetPerTupleMemoryContext, TupleConstr::has_generated_stored, InvalidateCatalogSnapshot(), InvalidSubTransactionId, StringInfoData::len, CopyFromStateData::line_buf, list_free(), list_length(), makeNode, MakeTransitionCaptureState(), MemoryContextSwitchTo(), ModifyTableState::mt_nrels, ModifyTableState::mt_transition_capture, NextCopyFrom(), NIL, ModifyTableState::operation, CopyFromStateData::opts, pgstat_progress_update_param(), PlanState::plan, ErrorContextCallback::previous, PROGRESS_COPY_TUPLES_EXCLUDED, PROGRESS_COPY_TUPLES_PROCESSED, ModifyTableState::ps, CopyFromStateData::qualexpr, CopyFromStateData::range_table, RelationData::rd_att, RelationData::rd_createSubid, RelationData::rd_firstRelfilelocatorSubid, RelationData::rd_newRelfilelocatorSubid, RelationData::rd_rel, CopyFromStateData::rel, RelationGetRelationName, RelationGetRelid, ReleaseBulkInsertStatePin(), ResetPerTupleExprContext, ModifyTableState::resultRelInfo, ResultRelInfo::ri_BatchSize, ResultRelInfo::ri_CopyMultiInsertBuffer, ResultRelInfo::ri_FdwRoutine, ResultRelInfo::ri_NumIndices, ResultRelInfo::ri_PartitionTupleSlot, ResultRelInfo::ri_RelationDesc, ResultRelInfo::ri_TrigDesc, ModifyTableState::rootResultRelInfo, CopyFromStateData::rteperminfos, PlanState::state, TABLE_INSERT_FROZEN, TABLE_INSERT_SKIP_FSM, table_slot_create(), table_tuple_insert(), TransitionCaptureState::tcs_original_insert_tuple, ThereAreNoPriorRegisteredSnapshots(), ThereAreNoReadyPortals(), CopyFromStateData::transition_capture, TriggerDesc::trig_insert_before_row, TriggerDesc::trig_insert_instead_row, TriggerDesc::trig_insert_new_table, RelationData::trigdesc, TupleTableSlot::tts_isnull, TupleTableSlot::tts_tableOid, TupleTableSlot::tts_values, CopyFromStateData::volatile_defexprs, and CopyFromStateData::whereClause.

Referenced by copy_table(), and DoCopy().

◆ CopyFromErrorCallback()

void CopyFromErrorCallback ( void *  arg)

Definition at line 116 of file copyfrom.c.

117 {
118  CopyFromState cstate = (CopyFromState) arg;
119 
120  if (cstate->relname_only)
121  {
122  errcontext("COPY %s",
123  cstate->cur_relname);
124  return;
125  }
126  if (cstate->opts.binary)
127  {
128  /* can't usefully display the data */
129  if (cstate->cur_attname)
130  errcontext("COPY %s, line %llu, column %s",
131  cstate->cur_relname,
132  (unsigned long long) cstate->cur_lineno,
133  cstate->cur_attname);
134  else
135  errcontext("COPY %s, line %llu",
136  cstate->cur_relname,
137  (unsigned long long) cstate->cur_lineno);
138  }
139  else
140  {
141  if (cstate->cur_attname && cstate->cur_attval)
142  {
143  /* error is relevant to a particular column */
144  char *attval;
145 
146  attval = limit_printout_length(cstate->cur_attval);
147  errcontext("COPY %s, line %llu, column %s: \"%s\"",
148  cstate->cur_relname,
149  (unsigned long long) cstate->cur_lineno,
150  cstate->cur_attname,
151  attval);
152  pfree(attval);
153  }
154  else if (cstate->cur_attname)
155  {
156  /* error is relevant to a particular column, value is NULL */
157  errcontext("COPY %s, line %llu, column %s: null input",
158  cstate->cur_relname,
159  (unsigned long long) cstate->cur_lineno,
160  cstate->cur_attname);
161  }
162  else
163  {
164  /*
165  * Error is relevant to a particular line.
166  *
167  * If line_buf still contains the correct line, print it.
168  */
169  if (cstate->line_buf_valid)
170  {
171  char *lineval;
172 
173  lineval = limit_printout_length(cstate->line_buf.data);
174  errcontext("COPY %s, line %llu: \"%s\"",
175  cstate->cur_relname,
176  (unsigned long long) cstate->cur_lineno, lineval);
177  pfree(lineval);
178  }
179  else
180  {
181  errcontext("COPY %s, line %llu",
182  cstate->cur_relname,
183  (unsigned long long) cstate->cur_lineno);
184  }
185  }
186  }
187 }
static char * limit_printout_length(const char *str)
Definition: copyfrom.c:195
#define errcontext
Definition: elog.h:192
struct CopyFromStateData * CopyFromState
Definition: copy.h:65
void pfree(void *pointer)
Definition: mcxt.c:1306
void * arg

References arg, CopyFormatOptions::binary, CopyFromStateData::cur_attname, CopyFromStateData::cur_attval, CopyFromStateData::cur_lineno, CopyFromStateData::cur_relname, StringInfoData::data, errcontext, limit_printout_length(), CopyFromStateData::line_buf, CopyFromStateData::line_buf_valid, CopyFromStateData::opts, pfree(), and CopyFromStateData::relname_only.

Referenced by CopyFrom(), file_acquire_sample_rows(), and fileIterateForeignScan().

◆ CopyGetAttnums()

List* CopyGetAttnums ( TupleDesc  tupDesc,
Relation  rel,
List attnamelist 
)

Definition at line 722 of file copy.c.

723 {
724  List *attnums = NIL;
725 
726  if (attnamelist == NIL)
727  {
728  /* Generate default column list */
729  int attr_count = tupDesc->natts;
730  int i;
731 
732  for (i = 0; i < attr_count; i++)
733  {
734  if (TupleDescAttr(tupDesc, i)->attisdropped)
735  continue;
736  if (TupleDescAttr(tupDesc, i)->attgenerated)
737  continue;
738  attnums = lappend_int(attnums, i + 1);
739  }
740  }
741  else
742  {
743  /* Validate the user-supplied list and extract attnums */
744  ListCell *l;
745 
746  foreach(l, attnamelist)
747  {
748  char *name = strVal(lfirst(l));
749  int attnum;
750  int i;
751 
752  /* Lookup column name */
754  for (i = 0; i < tupDesc->natts; i++)
755  {
756  Form_pg_attribute att = TupleDescAttr(tupDesc, i);
757 
758  if (att->attisdropped)
759  continue;
760  if (namestrcmp(&(att->attname), name) == 0)
761  {
762  if (att->attgenerated)
763  ereport(ERROR,
764  (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
765  errmsg("column \"%s\" is a generated column",
766  name),
767  errdetail("Generated columns cannot be used in COPY.")));
768  attnum = att->attnum;
769  break;
770  }
771  }
772  if (attnum == InvalidAttrNumber)
773  {
774  if (rel != NULL)
775  ereport(ERROR,
776  (errcode(ERRCODE_UNDEFINED_COLUMN),
777  errmsg("column \"%s\" of relation \"%s\" does not exist",
778  name, RelationGetRelationName(rel))));
779  else
780  ereport(ERROR,
781  (errcode(ERRCODE_UNDEFINED_COLUMN),
782  errmsg("column \"%s\" does not exist",
783  name)));
784  }
785  /* Check for duplicates */
786  if (list_member_int(attnums, attnum))
787  ereport(ERROR,
788  (errcode(ERRCODE_DUPLICATE_COLUMN),
789  errmsg("column \"%s\" specified more than once",
790  name)));
791  attnums = lappend_int(attnums, attnum);
792  }
793  }
794 
795  return attnums;
796 }
#define InvalidAttrNumber
Definition: attnum.h:23
int errdetail(const char *fmt,...)
Definition: elog.c:1039
const char * name
Definition: encode.c:561
List * lappend_int(List *list, int datum)
Definition: list.c:356
int namestrcmp(Name name, const char *str)
Definition: name.c:247
#define lfirst(lc)
Definition: pg_list.h:170
#define strVal(v)
Definition: value.h:82

References attnum, ereport, errcode(), errdetail(), errmsg(), ERROR, i, InvalidAttrNumber, lappend_int(), lfirst, list_member_int(), name, namestrcmp(), TupleDescData::natts, NIL, RelationGetRelationName, strVal, and TupleDescAttr.

Referenced by BeginCopyFrom(), BeginCopyTo(), and DoCopy().

◆ CreateCopyDestReceiver()

DestReceiver* CreateCopyDestReceiver ( void  )

Definition at line 1275 of file copyto.c.

1276 {
1277  DR_copy *self = (DR_copy *) palloc(sizeof(DR_copy));
1278 
1279  self->pub.receiveSlot = copy_dest_receive;
1280  self->pub.rStartup = copy_dest_startup;
1281  self->pub.rShutdown = copy_dest_shutdown;
1282  self->pub.rDestroy = copy_dest_destroy;
1283  self->pub.mydest = DestCopyOut;
1284 
1285  self->cstate = NULL; /* will be set later */
1286  self->processed = 0;
1287 
1288  return (DestReceiver *) self;
1289 }
static bool copy_dest_receive(TupleTableSlot *slot, DestReceiver *self)
Definition: copyto.c:1238
static void copy_dest_destroy(DestReceiver *self)
Definition: copyto.c:1266
static void copy_dest_shutdown(DestReceiver *self)
Definition: copyto.c:1257
static void copy_dest_startup(DestReceiver *self, int operation, TupleDesc typeinfo)
Definition: copyto.c:1229

References copy_dest_destroy(), copy_dest_receive(), copy_dest_shutdown(), copy_dest_startup(), DestCopyOut, and palloc().

Referenced by CreateDestReceiver().

◆ DoCopy()

void DoCopy ( ParseState pstate,
const CopyStmt stmt,
int  stmt_location,
int  stmt_len,
uint64 *  processed 
)

Definition at line 64 of file copy.c.

67 {
68  bool is_from = stmt->is_from;
69  bool pipe = (stmt->filename == NULL);
70  Relation rel;
71  Oid relid;
72  RawStmt *query = NULL;
73  Node *whereClause = NULL;
74 
75  /*
76  * Disallow COPY to/from file or program except to users with the
77  * appropriate role.
78  */
79  if (!pipe)
80  {
81  if (stmt->is_program)
82  {
83  if (!has_privs_of_role(GetUserId(), ROLE_PG_EXECUTE_SERVER_PROGRAM))
84  ereport(ERROR,
85  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
86  errmsg("must be superuser or have privileges of the pg_execute_server_program role to COPY to or from an external program"),
87  errhint("Anyone can COPY to stdout or from stdin. "
88  "psql's \\copy command also works for anyone.")));
89  }
90  else
91  {
92  if (is_from && !has_privs_of_role(GetUserId(), ROLE_PG_READ_SERVER_FILES))
93  ereport(ERROR,
94  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
95  errmsg("must be superuser or have privileges of the pg_read_server_files role to COPY from a file"),
96  errhint("Anyone can COPY to stdout or from stdin. "
97  "psql's \\copy command also works for anyone.")));
98 
99  if (!is_from && !has_privs_of_role(GetUserId(), ROLE_PG_WRITE_SERVER_FILES))
100  ereport(ERROR,
101  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
102  errmsg("must be superuser or have privileges of the pg_write_server_files role to COPY to a file"),
103  errhint("Anyone can COPY to stdout or from stdin. "
104  "psql's \\copy command also works for anyone.")));
105  }
106  }
107 
108  if (stmt->relation)
109  {
110  LOCKMODE lockmode = is_from ? RowExclusiveLock : AccessShareLock;
111  ParseNamespaceItem *nsitem;
112  RTEPermissionInfo *perminfo;
113  TupleDesc tupDesc;
114  List *attnums;
115  ListCell *cur;
116 
117  Assert(!stmt->query);
118 
119  /* Open and lock the relation, using the appropriate lock type. */
120  rel = table_openrv(stmt->relation, lockmode);
121 
122  relid = RelationGetRelid(rel);
123 
124  nsitem = addRangeTableEntryForRelation(pstate, rel, lockmode,
125  NULL, false, false);
126 
127  perminfo = nsitem->p_perminfo;
128  perminfo->requiredPerms = (is_from ? ACL_INSERT : ACL_SELECT);
129 
130  if (stmt->whereClause)
131  {
132  /* add nsitem to query namespace */
133  addNSItemToQuery(pstate, nsitem, false, true, true);
134 
135  /* Transform the raw expression tree */
136  whereClause = transformExpr(pstate, stmt->whereClause, EXPR_KIND_COPY_WHERE);
137 
138  /* Make sure it yields a boolean result. */
139  whereClause = coerce_to_boolean(pstate, whereClause, "WHERE");
140 
141  /* we have to fix its collations too */
142  assign_expr_collations(pstate, whereClause);
143 
144  whereClause = eval_const_expressions(NULL, whereClause);
145 
146  whereClause = (Node *) canonicalize_qual((Expr *) whereClause, false);
147  whereClause = (Node *) make_ands_implicit((Expr *) whereClause);
148  }
149 
150  tupDesc = RelationGetDescr(rel);
151  attnums = CopyGetAttnums(tupDesc, rel, stmt->attlist);
152  foreach(cur, attnums)
153  {
154  int attno;
155  Bitmapset **bms;
156 
158  bms = is_from ? &perminfo->insertedCols : &perminfo->selectedCols;
159 
160  *bms = bms_add_member(*bms, attno);
161  }
162  ExecCheckPermissions(pstate->p_rtable, list_make1(perminfo), true);
163 
164  /*
165  * Permission check for row security policies.
166  *
167  * check_enable_rls will ereport(ERROR) if the user has requested
168  * something invalid and will otherwise indicate if we should enable
169  * RLS (returns RLS_ENABLED) or not for this COPY statement.
170  *
171  * If the relation has a row security policy and we are to apply it
172  * then perform a "query" copy and allow the normal query processing
173  * to handle the policies.
174  *
175  * If RLS is not enabled for this, then just fall through to the
176  * normal non-filtering relation handling.
177  */
178  if (check_enable_rls(relid, InvalidOid, false) == RLS_ENABLED)
179  {
181  ColumnRef *cr;
182  ResTarget *target;
183  RangeVar *from;
184  List *targetList = NIL;
185 
186  if (is_from)
187  ereport(ERROR,
188  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
189  errmsg("COPY FROM not supported with row-level security"),
190  errhint("Use INSERT statements instead.")));
191 
192  /*
193  * Build target list
194  *
195  * If no columns are specified in the attribute list of the COPY
196  * command, then the target list is 'all' columns. Therefore, '*'
197  * should be used as the target list for the resulting SELECT
198  * statement.
199  *
200  * In the case that columns are specified in the attribute list,
201  * create a ColumnRef and ResTarget for each column and add them
202  * to the target list for the resulting SELECT statement.
203  */
204  if (!stmt->attlist)
205  {
206  cr = makeNode(ColumnRef);
208  cr->location = -1;
209 
210  target = makeNode(ResTarget);
211  target->name = NULL;
212  target->indirection = NIL;
213  target->val = (Node *) cr;
214  target->location = -1;
215 
216  targetList = list_make1(target);
217  }
218  else
219  {
220  ListCell *lc;
221 
222  foreach(lc, stmt->attlist)
223  {
224  /*
225  * Build the ColumnRef for each column. The ColumnRef
226  * 'fields' property is a String node that corresponds to
227  * the column name respectively.
228  */
229  cr = makeNode(ColumnRef);
230  cr->fields = list_make1(lfirst(lc));
231  cr->location = -1;
232 
233  /* Build the ResTarget and add the ColumnRef to it. */
234  target = makeNode(ResTarget);
235  target->name = NULL;
236  target->indirection = NIL;
237  target->val = (Node *) cr;
238  target->location = -1;
239 
240  /* Add each column to the SELECT statement's target list */
241  targetList = lappend(targetList, target);
242  }
243  }
244 
245  /*
246  * Build RangeVar for from clause, fully qualified based on the
247  * relation which we have opened and locked.
248  */
251  -1);
252 
253  /* Build query */
255  select->targetList = targetList;
256  select->fromClause = list_make1(from);
257 
258  query = makeNode(RawStmt);
259  query->stmt = (Node *) select;
260  query->stmt_location = stmt_location;
261  query->stmt_len = stmt_len;
262 
263  /*
264  * Close the relation for now, but keep the lock on it to prevent
265  * changes between now and when we start the query-based COPY.
266  *
267  * We'll reopen it later as part of the query-based COPY.
268  */
269  table_close(rel, NoLock);
270  rel = NULL;
271  }
272  }
273  else
274  {
275  Assert(stmt->query);
276 
277  /* MERGE is allowed by parser, but unimplemented. Reject for now */
278  if (IsA(stmt->query, MergeStmt))
279  ereport(ERROR,
280  errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
281  errmsg("MERGE not supported in COPY"));
282 
283  query = makeNode(RawStmt);
284  query->stmt = stmt->query;
285  query->stmt_location = stmt_location;
286  query->stmt_len = stmt_len;
287 
288  relid = InvalidOid;
289  rel = NULL;
290  }
291 
292  if (is_from)
293  {
294  CopyFromState cstate;
295 
296  Assert(rel);
297 
298  /* check read-only transaction and parallel mode */
299  if (XactReadOnly && !rel->rd_islocaltemp)
300  PreventCommandIfReadOnly("COPY FROM");
301 
302  cstate = BeginCopyFrom(pstate, rel, whereClause,
303  stmt->filename, stmt->is_program,
304  NULL, stmt->attlist, stmt->options);
305  *processed = CopyFrom(cstate); /* copy from file to database */
306  EndCopyFrom(cstate);
307  }
308  else
309  {
310  CopyToState cstate;
311 
312  cstate = BeginCopyTo(pstate, rel, query, relid,
313  stmt->filename, stmt->is_program,
314  NULL, stmt->attlist, stmt->options);
315  *processed = DoCopyTo(cstate); /* copy from database to file */
316  EndCopyTo(cstate);
317  }
318 
319  if (rel != NULL)
320  table_close(rel, NoLock);
321 }
bool has_privs_of_role(Oid member, Oid role)
Definition: acl.c:4949
Bitmapset * bms_add_member(Bitmapset *a, int x)
Definition: bitmapset.c:739
Node * eval_const_expressions(PlannerInfo *root, Node *node)
Definition: clauses.c:2132
CopyFromState BeginCopyFrom(ParseState *pstate, Relation rel, Node *whereClause, const char *filename, bool is_program, copy_data_source_cb data_source_cb, List *attnamelist, List *options)
Definition: copyfrom.c:1339
uint64 CopyFrom(CopyFromState cstate)
Definition: copyfrom.c:632
void EndCopyFrom(CopyFromState cstate)
Definition: copyfrom.c:1716
uint64 DoCopyTo(CopyToState cstate)
Definition: copyto.c:749
CopyToState BeginCopyTo(ParseState *pstate, Relation rel, RawStmt *raw_query, Oid queryRelId, const char *filename, bool is_program, copy_data_dest_cb data_dest_cb, List *attnamelist, List *options)
Definition: copyto.c:357
void EndCopyTo(CopyToState cstate)
Definition: copyto.c:728
bool ExecCheckPermissions(List *rangeTable, List *rteperminfos, bool ereport_on_violation)
Definition: execMain.c:574
List * lappend(List *list, void *datum)
Definition: list.c:338
int LOCKMODE
Definition: lockdefs.h:26
#define NoLock
Definition: lockdefs.h:34
#define AccessShareLock
Definition: lockdefs.h:36
#define RowExclusiveLock
Definition: lockdefs.h:38
char * get_namespace_name(Oid nspid)
Definition: lsyscache.c:3331
List * make_ands_implicit(Expr *clause)
Definition: makefuncs.c:719
RangeVar * makeRangeVar(char *schemaname, char *relname, int location)
Definition: makefuncs.c:422
Oid GetUserId(void)
Definition: miscinit.c:497
Node * coerce_to_boolean(ParseState *pstate, Node *node, const char *constructName)
void assign_expr_collations(ParseState *pstate, Node *expr)
Node * transformExpr(ParseState *pstate, Node *expr, ParseExprKind exprKind)
Definition: parse_expr.c:92
@ EXPR_KIND_COPY_WHERE
Definition: parse_node.h:81
ParseNamespaceItem * addRangeTableEntryForRelation(ParseState *pstate, Relation rel, int lockmode, Alias *alias, bool inh, bool inFromCl)
void addNSItemToQuery(ParseState *pstate, ParseNamespaceItem *nsitem, bool addToJoinList, bool addToRelNameSpace, bool addToVarNameSpace)
#define ACL_INSERT
Definition: parsenodes.h:83
#define ACL_SELECT
Definition: parsenodes.h:84
#define list_make1(x1)
Definition: pg_list.h:210
Expr * canonicalize_qual(Expr *qual, bool is_check)
Definition: prepqual.c:294
#define RelationGetNamespace(relation)
Definition: rel.h:542
int check_enable_rls(Oid relid, Oid checkAsUser, bool noError)
Definition: rls.c:52
@ RLS_ENABLED
Definition: rls.h:45
int location
Definition: parsenodes.h:262
List * fields
Definition: parsenodes.h:261
bool is_program
Definition: parsenodes.h:2229
RangeVar * relation
Definition: parsenodes.h:2223
List * options
Definition: parsenodes.h:2231
bool is_from
Definition: parsenodes.h:2228
char * filename
Definition: parsenodes.h:2230
List * attlist
Definition: parsenodes.h:2226
Node * whereClause
Definition: parsenodes.h:2232
Node * query
Definition: parsenodes.h:2224
RTEPermissionInfo * p_perminfo
Definition: parse_node.h:280
Bitmapset * selectedCols
Definition: parsenodes.h:1210
AclMode requiredPerms
Definition: parsenodes.h:1208
Bitmapset * insertedCols
Definition: parsenodes.h:1211
int stmt_len
Definition: parsenodes.h:1659
Node * stmt
Definition: parsenodes.h:1657
int stmt_location
Definition: parsenodes.h:1658
bool rd_islocaltemp
Definition: rel.h:60
int location
Definition: parsenodes.h:487
Node * val
Definition: parsenodes.h:486
List * indirection
Definition: parsenodes.h:485
char * name
Definition: parsenodes.h:484
#define FirstLowInvalidHeapAttributeNumber
Definition: sysattr.h:27
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:126
Relation table_openrv(const RangeVar *relation, LOCKMODE lockmode)
Definition: table.c:83
void PreventCommandIfReadOnly(const char *cmdname)
Definition: utility.c:411
#define select(n, r, w, e, timeout)
Definition: win32_port.h:492
bool XactReadOnly
Definition: xact.c:81

References AccessShareLock, ACL_INSERT, ACL_SELECT, addNSItemToQuery(), addRangeTableEntryForRelation(), Assert(), assign_expr_collations(), CopyStmt::attlist, BeginCopyFrom(), BeginCopyTo(), bms_add_member(), canonicalize_qual(), check_enable_rls(), coerce_to_boolean(), CopyFrom(), CopyGetAttnums(), cur, DoCopyTo(), EndCopyFrom(), EndCopyTo(), ereport, errcode(), errhint(), errmsg(), ERROR, eval_const_expressions(), ExecCheckPermissions(), EXPR_KIND_COPY_WHERE, ColumnRef::fields, CopyStmt::filename, FirstLowInvalidHeapAttributeNumber, get_namespace_name(), GetUserId(), has_privs_of_role(), ResTarget::indirection, RTEPermissionInfo::insertedCols, InvalidOid, CopyStmt::is_from, CopyStmt::is_program, IsA, lappend(), lfirst, lfirst_int, list_make1, ColumnRef::location, ResTarget::location, make_ands_implicit(), makeNode, makeRangeVar(), ResTarget::name, NIL, NoLock, CopyStmt::options, ParseNamespaceItem::p_perminfo, ParseState::p_rtable, PreventCommandIfReadOnly(), pstrdup(), CopyStmt::query, RelationData::rd_islocaltemp, CopyStmt::relation, RelationGetDescr, RelationGetNamespace, RelationGetRelationName, RelationGetRelid, RTEPermissionInfo::requiredPerms, RLS_ENABLED, RowExclusiveLock, select, RTEPermissionInfo::selectedCols, RawStmt::stmt, RawStmt::stmt_len, RawStmt::stmt_location, table_close(), table_openrv(), transformExpr(), ResTarget::val, CopyStmt::whereClause, and XactReadOnly.

Referenced by standard_ProcessUtility().

◆ DoCopyTo()

uint64 DoCopyTo ( CopyToState  cstate)

Definition at line 749 of file copyto.c.

750 {
751  bool pipe = (cstate->filename == NULL && cstate->data_dest_cb == NULL);
752  bool fe_copy = (pipe && whereToSendOutput == DestRemote);
753  TupleDesc tupDesc;
754  int num_phys_attrs;
755  ListCell *cur;
756  uint64 processed;
757 
758  if (fe_copy)
759  SendCopyBegin(cstate);
760 
761  if (cstate->rel)
762  tupDesc = RelationGetDescr(cstate->rel);
763  else
764  tupDesc = cstate->queryDesc->tupDesc;
765  num_phys_attrs = tupDesc->natts;
766  cstate->opts.null_print_client = cstate->opts.null_print; /* default */
767 
768  /* We use fe_msgbuf as a per-row buffer regardless of copy_dest */
769  cstate->fe_msgbuf = makeStringInfo();
770 
771  /* Get info about the columns we need to process. */
772  cstate->out_functions = (FmgrInfo *) palloc(num_phys_attrs * sizeof(FmgrInfo));
773  foreach(cur, cstate->attnumlist)
774  {
775  int attnum = lfirst_int(cur);
776  Oid out_func_oid;
777  bool isvarlena;
778  Form_pg_attribute attr = TupleDescAttr(tupDesc, attnum - 1);
779 
780  if (cstate->opts.binary)
781  getTypeBinaryOutputInfo(attr->atttypid,
782  &out_func_oid,
783  &isvarlena);
784  else
785  getTypeOutputInfo(attr->atttypid,
786  &out_func_oid,
787  &isvarlena);
788  fmgr_info(out_func_oid, &cstate->out_functions[attnum - 1]);
789  }
790 
791  /*
792  * Create a temporary memory context that we can reset once per row to
793  * recover palloc'd memory. This avoids any problems with leaks inside
794  * datatype output routines, and should be faster than retail pfree's
795  * anyway. (We don't need a whole econtext as CopyFrom does.)
796  */
798  "COPY TO",
800 
801  if (cstate->opts.binary)
802  {
803  /* Generate header for a binary copy */
804  int32 tmp;
805 
806  /* Signature */
807  CopySendData(cstate, BinarySignature, 11);
808  /* Flags field */
809  tmp = 0;
810  CopySendInt32(cstate, tmp);
811  /* No header extension */
812  tmp = 0;
813  CopySendInt32(cstate, tmp);
814  }
815  else
816  {
817  /*
818  * For non-binary copy, we need to convert null_print to file
819  * encoding, because it will be sent directly with CopySendString.
820  */
821  if (cstate->need_transcoding)
823  cstate->opts.null_print_len,
824  cstate->file_encoding);
825 
826  /* if a header has been requested send the line */
827  if (cstate->opts.header_line)
828  {
829  bool hdr_delim = false;
830 
831  foreach(cur, cstate->attnumlist)
832  {
833  int attnum = lfirst_int(cur);
834  char *colname;
835 
836  if (hdr_delim)
837  CopySendChar(cstate, cstate->opts.delim[0]);
838  hdr_delim = true;
839 
840  colname = NameStr(TupleDescAttr(tupDesc, attnum - 1)->attname);
841 
842  if (cstate->opts.csv_mode)
843  CopyAttributeOutCSV(cstate, colname, false,
844  list_length(cstate->attnumlist) == 1);
845  else
846  CopyAttributeOutText(cstate, colname);
847  }
848 
849  CopySendEndOfRow(cstate);
850  }
851  }
852 
853  if (cstate->rel)
854  {
855  TupleTableSlot *slot;
856  TableScanDesc scandesc;
857 
858  scandesc = table_beginscan(cstate->rel, GetActiveSnapshot(), 0, NULL);
859  slot = table_slot_create(cstate->rel, NULL);
860 
861  processed = 0;
862  while (table_scan_getnextslot(scandesc, ForwardScanDirection, slot))
863  {
865 
866  /* Deconstruct the tuple ... */
867  slot_getallattrs(slot);
868 
869  /* Format and send the data */
870  CopyOneRowTo(cstate, slot);
871 
872  /*
873  * Increment the number of processed tuples, and report the
874  * progress.
875  */
877  ++processed);
878  }
879 
881  table_endscan(scandesc);
882  }
883  else
884  {
885  /* run the plan --- the dest receiver will send tuples */
886  ExecutorRun(cstate->queryDesc, ForwardScanDirection, 0L, true);
887  processed = ((DR_copy *) cstate->queryDesc->dest)->processed;
888  }
889 
890  if (cstate->opts.binary)
891  {
892  /* Generate trailer for a binary copy */
893  CopySendInt16(cstate, -1);
894  /* Need to flush out the trailer */
895  CopySendEndOfRow(cstate);
896  }
897 
899 
900  if (fe_copy)
901  SendCopyEnd(cstate);
902 
903  return processed;
904 }
signed int int32
Definition: c.h:430
static void CopySendInt32(CopyToState cstate, int32 val)
Definition: copyto.c:272
static void CopyAttributeOutText(CopyToState cstate, const char *string)
Definition: copyto.c:991
static void CopySendInt16(CopyToState cstate, int16 val)
Definition: copyto.c:284
static void CopySendData(CopyToState cstate, const void *databuf, int datasize)
Definition: copyto.c:176
static void CopySendChar(CopyToState cstate, char c)
Definition: copyto.c:188
static void CopyAttributeOutCSV(CopyToState cstate, const char *string, bool use_quote, bool single_attr)
Definition: copyto.c:1144
static void SendCopyBegin(CopyToState cstate)
Definition: copyto.c:140
static void SendCopyEnd(CopyToState cstate)
Definition: copyto.c:157
static void CopySendEndOfRow(CopyToState cstate)
Definition: copyto.c:194
static void CopyOneRowTo(CopyToState cstate, TupleTableSlot *slot)
Definition: copyto.c:910
static const char BinarySignature[11]
Definition: copyto.c:113
void ExecutorRun(QueryDesc *queryDesc, ScanDirection direction, uint64 count, bool execute_once)
Definition: execMain.c:301
void ExecDropSingleTupleTableSlot(TupleTableSlot *slot)
Definition: execTuples.c:1254
void getTypeBinaryOutputInfo(Oid type, Oid *typSend, bool *typIsVarlena)
Definition: lsyscache.c:2931
void getTypeOutputInfo(Oid type, Oid *typOutput, bool *typIsVarlena)
Definition: lsyscache.c:2865
char * pg_server_to_any(const char *s, int len, int encoding)
Definition: mbutils.c:749
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:376
NameData attname
Definition: pg_attribute.h:41
@ ForwardScanDirection
Definition: sdir.h:26
StringInfo makeStringInfo(void)
Definition: stringinfo.c:41
int null_print_len
Definition: copy.h:48
CopyHeaderChoice header_line
Definition: copy.h:46
char * null_print
Definition: copy.h:47
char * delim
Definition: copy.h:50
char * null_print_client
Definition: copy.h:49
bool csv_mode
Definition: copy.h:45
FmgrInfo * out_functions
Definition: copyto.c:99
MemoryContext rowcontext
Definition: copyto.c:100
StringInfo fe_msgbuf
Definition: copyto.c:77
DestReceiver * dest
Definition: execdesc.h:41
static TableScanDesc table_beginscan(Relation rel, Snapshot snapshot, int nkeys, struct ScanKeyData *key)
Definition: tableam.h:885
static void table_endscan(TableScanDesc scan)
Definition: tableam.h:993
static bool table_scan_getnextslot(TableScanDesc sscan, ScanDirection direction, TupleTableSlot *slot)
Definition: tableam.h:1034
static void slot_getallattrs(TupleTableSlot *slot)
Definition: tuptable.h:362

References ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, attname, attnum, CopyToStateData::attnumlist, CopyFormatOptions::binary, BinarySignature, CHECK_FOR_INTERRUPTS, CopyAttributeOutCSV(), CopyAttributeOutText(), CopyOneRowTo(), CopySendChar(), CopySendData(), CopySendEndOfRow(), CopySendInt16(), CopySendInt32(), CopyFormatOptions::csv_mode, cur, CurrentMemoryContext, CopyToStateData::data_dest_cb, CopyFormatOptions::delim, QueryDesc::dest, DestRemote, ExecDropSingleTupleTableSlot(), ExecutorRun(), CopyToStateData::fe_msgbuf, CopyToStateData::file_encoding, CopyToStateData::filename, fmgr_info(), ForwardScanDirection, GetActiveSnapshot(), getTypeBinaryOutputInfo(), getTypeOutputInfo(), CopyFormatOptions::header_line, lfirst_int, list_length(), makeStringInfo(), MemoryContextDelete(), NameStr, TupleDescData::natts, CopyToStateData::need_transcoding, CopyFormatOptions::null_print, CopyFormatOptions::null_print_client, CopyFormatOptions::null_print_len, CopyToStateData::opts, CopyToStateData::out_functions, palloc(), pg_server_to_any(), pgstat_progress_update_param(), PROGRESS_COPY_TUPLES_PROCESSED, CopyToStateData::queryDesc, CopyToStateData::rel, RelationGetDescr, CopyToStateData::rowcontext, SendCopyBegin(), SendCopyEnd(), slot_getallattrs(), table_beginscan(), table_endscan(), table_scan_getnextslot(), table_slot_create(), QueryDesc::tupDesc, TupleDescAttr, and whereToSendOutput.

Referenced by DoCopy(), and test_copy_to_callback().

◆ EndCopyFrom()

void EndCopyFrom ( CopyFromState  cstate)

Definition at line 1716 of file copyfrom.c.

1717 {
1718  /* No COPY FROM related resources except memory. */
1719  if (cstate->is_program)
1720  {
1721  ClosePipeFromProgram(cstate);
1722  }
1723  else
1724  {
1725  if (cstate->filename != NULL && FreeFile(cstate->copy_file))
1726  ereport(ERROR,
1728  errmsg("could not close file \"%s\": %m",
1729  cstate->filename)));
1730  }
1731 
1733 
1735  pfree(cstate);
1736 }
void pgstat_progress_end_command(void)
static void ClosePipeFromProgram(CopyFromState cstate)
Definition: copyfrom.c:1742
int FreeFile(FILE *file)
Definition: fd.c:2581

References ClosePipeFromProgram(), CopyFromStateData::copy_file, CopyFromStateData::copycontext, ereport, errcode_for_file_access(), errmsg(), ERROR, CopyFromStateData::filename, FreeFile(), CopyFromStateData::is_program, MemoryContextDelete(), pfree(), and pgstat_progress_end_command().

Referenced by DoCopy(), file_acquire_sample_rows(), fileEndForeignScan(), and fileReScanForeignScan().

◆ EndCopyTo()

void EndCopyTo ( CopyToState  cstate)

Definition at line 728 of file copyto.c.

729 {
730  if (cstate->queryDesc != NULL)
731  {
732  /* Close down the query and free resources. */
733  ExecutorFinish(cstate->queryDesc);
734  ExecutorEnd(cstate->queryDesc);
735  FreeQueryDesc(cstate->queryDesc);
737  }
738 
739  /* Clean up storage */
740  EndCopy(cstate);
741 }
static void EndCopy(CopyToState cstate)
Definition: copyto.c:321
void ExecutorEnd(QueryDesc *queryDesc)
Definition: execMain.c:462
void ExecutorFinish(QueryDesc *queryDesc)
Definition: execMain.c:402
void FreeQueryDesc(QueryDesc *qdesc)
Definition: pquery.c:105
void PopActiveSnapshot(void)
Definition: snapmgr.c:778

References EndCopy(), ExecutorEnd(), ExecutorFinish(), FreeQueryDesc(), PopActiveSnapshot(), and CopyToStateData::queryDesc.

Referenced by DoCopy(), and test_copy_to_callback().

◆ NextCopyFrom()

bool NextCopyFrom ( CopyFromState  cstate,
ExprContext econtext,
Datum values,
bool nulls 
)

Definition at line 853 of file copyfromparse.c.

855 {
856  TupleDesc tupDesc;
857  AttrNumber num_phys_attrs,
858  attr_count,
859  num_defaults = cstate->num_defaults;
860  FmgrInfo *in_functions = cstate->in_functions;
861  Oid *typioparams = cstate->typioparams;
862  int i;
863  int *defmap = cstate->defmap;
864  ExprState **defexprs = cstate->defexprs;
865 
866  tupDesc = RelationGetDescr(cstate->rel);
867  num_phys_attrs = tupDesc->natts;
868  attr_count = list_length(cstate->attnumlist);
869 
870  /* Initialize all values for row to NULL */
871  MemSet(values, 0, num_phys_attrs * sizeof(Datum));
872  MemSet(nulls, true, num_phys_attrs * sizeof(bool));
873 
874  if (!cstate->opts.binary)
875  {
876  char **field_strings;
877  ListCell *cur;
878  int fldct;
879  int fieldno;
880  char *string;
881 
882  /* read raw fields in the next line */
883  if (!NextCopyFromRawFields(cstate, &field_strings, &fldct))
884  return false;
885 
886  /* check for overflowing fields */
887  if (attr_count > 0 && fldct > attr_count)
888  ereport(ERROR,
889  (errcode(ERRCODE_BAD_COPY_FILE_FORMAT),
890  errmsg("extra data after last expected column")));
891 
892  fieldno = 0;
893 
894  /* Loop to read the user attributes on the line. */
895  foreach(cur, cstate->attnumlist)
896  {
897  int attnum = lfirst_int(cur);
898  int m = attnum - 1;
899  Form_pg_attribute att = TupleDescAttr(tupDesc, m);
900 
901  if (fieldno >= fldct)
902  ereport(ERROR,
903  (errcode(ERRCODE_BAD_COPY_FILE_FORMAT),
904  errmsg("missing data for column \"%s\"",
905  NameStr(att->attname))));
906  string = field_strings[fieldno++];
907 
908  if (cstate->convert_select_flags &&
909  !cstate->convert_select_flags[m])
910  {
911  /* ignore input field, leaving column as NULL */
912  continue;
913  }
914 
915  if (cstate->opts.csv_mode)
916  {
917  if (string == NULL &&
918  cstate->opts.force_notnull_flags[m])
919  {
920  /*
921  * FORCE_NOT_NULL option is set and column is NULL -
922  * convert it to the NULL string.
923  */
924  string = cstate->opts.null_print;
925  }
926  else if (string != NULL && cstate->opts.force_null_flags[m]
927  && strcmp(string, cstate->opts.null_print) == 0)
928  {
929  /*
930  * FORCE_NULL option is set and column matches the NULL
931  * string. It must have been quoted, or otherwise the
932  * string would already have been set to NULL. Convert it
933  * to NULL as specified.
934  */
935  string = NULL;
936  }
937  }
938 
939  cstate->cur_attname = NameStr(att->attname);
940  cstate->cur_attval = string;
941  values[m] = InputFunctionCall(&in_functions[m],
942  string,
943  typioparams[m],
944  att->atttypmod);
945  if (string != NULL)
946  nulls[m] = false;
947  cstate->cur_attname = NULL;
948  cstate->cur_attval = NULL;
949  }
950 
951  Assert(fieldno == attr_count);
952  }
953  else
954  {
955  /* binary */
956  int16 fld_count;
957  ListCell *cur;
958 
959  cstate->cur_lineno++;
960 
961  if (!CopyGetInt16(cstate, &fld_count))
962  {
963  /* EOF detected (end of file, or protocol-level EOF) */
964  return false;
965  }
966 
967  if (fld_count == -1)
968  {
969  /*
970  * Received EOF marker. Wait for the protocol-level EOF, and
971  * complain if it doesn't come immediately. In COPY FROM STDIN,
972  * this ensures that we correctly handle CopyFail, if client
973  * chooses to send that now. When copying from file, we could
974  * ignore the rest of the file like in text mode, but we choose to
975  * be consistent with the COPY FROM STDIN case.
976  */
977  char dummy;
978 
979  if (CopyReadBinaryData(cstate, &dummy, 1) > 0)
980  ereport(ERROR,
981  (errcode(ERRCODE_BAD_COPY_FILE_FORMAT),
982  errmsg("received copy data after EOF marker")));
983  return false;
984  }
985 
986  if (fld_count != attr_count)
987  ereport(ERROR,
988  (errcode(ERRCODE_BAD_COPY_FILE_FORMAT),
989  errmsg("row field count is %d, expected %d",
990  (int) fld_count, attr_count)));
991 
992  foreach(cur, cstate->attnumlist)
993  {
994  int attnum = lfirst_int(cur);
995  int m = attnum - 1;
996  Form_pg_attribute att = TupleDescAttr(tupDesc, m);
997 
998  cstate->cur_attname = NameStr(att->attname);
999  values[m] = CopyReadBinaryAttribute(cstate,
1000  &in_functions[m],
1001  typioparams[m],
1002  att->atttypmod,
1003  &nulls[m]);
1004  cstate->cur_attname = NULL;
1005  }
1006  }
1007 
1008  /*
1009  * Now compute and insert any defaults available for the columns not
1010  * provided by the input data. Anything not processed here or above will
1011  * remain NULL.
1012  */
1013  for (i = 0; i < num_defaults; i++)
1014  {
1015  /*
1016  * The caller must supply econtext and have switched into the
1017  * per-tuple memory context in it.
1018  */
1019  Assert(econtext != NULL);
1021 
1022  values[defmap[i]] = ExecEvalExpr(defexprs[i], econtext,
1023  &nulls[defmap[i]]);
1024  }
1025 
1026  return true;
1027 }
static Datum values[MAXATTR]
Definition: bootstrap.c:156
signed short int16
Definition: c.h:429
#define MemSet(start, val, len)
Definition: c.h:953
static bool CopyGetInt16(CopyFromState cstate, int16 *val)
static Datum CopyReadBinaryAttribute(CopyFromState cstate, FmgrInfo *flinfo, Oid typioparam, int32 typmod, bool *isnull)
static int CopyReadBinaryData(CopyFromState cstate, char *dest, int nbytes)
bool NextCopyFromRawFields(CopyFromState cstate, char ***fields, int *nfields)
static Datum ExecEvalExpr(ExprState *state, ExprContext *econtext, bool *isNull)
Definition: executor.h:321
Datum InputFunctionCall(FmgrInfo *flinfo, char *str, Oid typioparam, int32 typmod)
Definition: fmgr.c:1515
uintptr_t Datum
Definition: postgres.h:412
char string[11]
Definition: preproc-type.c:52
MemoryContext ecxt_per_tuple_memory
Definition: execnodes.h:255

References Assert(), attnum, CopyFromStateData::attnumlist, CopyFormatOptions::binary, CopyFromStateData::convert_select_flags, CopyGetInt16(), CopyReadBinaryAttribute(), CopyReadBinaryData(), CopyFormatOptions::csv_mode, cur, CopyFromStateData::cur_attname, CopyFromStateData::cur_attval, CopyFromStateData::cur_lineno, CurrentMemoryContext, CopyFromStateData::defexprs, CopyFromStateData::defmap, ExprContext::ecxt_per_tuple_memory, ereport, errcode(), errmsg(), ERROR, ExecEvalExpr(), CopyFormatOptions::force_notnull_flags, CopyFormatOptions::force_null_flags, i, CopyFromStateData::in_functions, InputFunctionCall(), lfirst_int, list_length(), MemSet, NameStr, TupleDescData::natts, NextCopyFromRawFields(), CopyFormatOptions::null_print, CopyFromStateData::num_defaults, CopyFromStateData::opts, CopyFromStateData::rel, RelationGetDescr, TupleDescAttr, CopyFromStateData::typioparams, and values.

Referenced by CopyFrom(), file_acquire_sample_rows(), and fileIterateForeignScan().

◆ NextCopyFromRawFields()

bool NextCopyFromRawFields ( CopyFromState  cstate,
char ***  fields,
int *  nfields 
)

Definition at line 754 of file copyfromparse.c.

755 {
756  int fldct;
757  bool done;
758 
759  /* only available for text or csv input */
760  Assert(!cstate->opts.binary);
761 
762  /* on input check that the header line is correct if needed */
763  if (cstate->cur_lineno == 0 && cstate->opts.header_line)
764  {
765  ListCell *cur;
766  TupleDesc tupDesc;
767 
768  tupDesc = RelationGetDescr(cstate->rel);
769 
770  cstate->cur_lineno++;
771  done = CopyReadLine(cstate);
772 
773  if (cstate->opts.header_line == COPY_HEADER_MATCH)
774  {
775  int fldnum;
776 
777  if (cstate->opts.csv_mode)
778  fldct = CopyReadAttributesCSV(cstate);
779  else
780  fldct = CopyReadAttributesText(cstate);
781 
782  if (fldct != list_length(cstate->attnumlist))
783  ereport(ERROR,
784  (errcode(ERRCODE_BAD_COPY_FILE_FORMAT),
785  errmsg("wrong number of fields in header line: got %d, expected %d",
786  fldct, list_length(cstate->attnumlist))));
787 
788  fldnum = 0;
789  foreach(cur, cstate->attnumlist)
790  {
791  int attnum = lfirst_int(cur);
792  char *colName;
793  Form_pg_attribute attr = TupleDescAttr(tupDesc, attnum - 1);
794 
795  Assert(fldnum < cstate->max_fields);
796 
797  colName = cstate->raw_fields[fldnum++];
798  if (colName == NULL)
799  ereport(ERROR,
800  (errcode(ERRCODE_BAD_COPY_FILE_FORMAT),
801  errmsg("column name mismatch in header line field %d: got null value (\"%s\"), expected \"%s\"",
802  fldnum, cstate->opts.null_print, NameStr(attr->attname))));
803 
804  if (namestrcmp(&attr->attname, colName) != 0)
805  {
806  ereport(ERROR,
807  (errcode(ERRCODE_BAD_COPY_FILE_FORMAT),
808  errmsg("column name mismatch in header line field %d: got \"%s\", expected \"%s\"",
809  fldnum, colName, NameStr(attr->attname))));
810  }
811  }
812  }
813 
814  if (done)
815  return false;
816  }
817 
818  cstate->cur_lineno++;
819 
820  /* Actually read the line into memory here */
821  done = CopyReadLine(cstate);
822 
823  /*
824  * EOF at start of line means we're done. If we see EOF after some
825  * characters, we act as though it was newline followed by EOF, ie,
826  * process the line and then exit loop on next iteration.
827  */
828  if (done && cstate->line_buf.len == 0)
829  return false;
830 
831  /* Parse the line into de-escaped field values */
832  if (cstate->opts.csv_mode)
833  fldct = CopyReadAttributesCSV(cstate);
834  else
835  fldct = CopyReadAttributesText(cstate);
836 
837  *fields = cstate->raw_fields;
838  *nfields = fldct;
839  return true;
840 }
static int CopyReadAttributesCSV(CopyFromState cstate)
static int CopyReadAttributesText(CopyFromState cstate)
static bool CopyReadLine(CopyFromState cstate)

References Assert(), attnum, CopyFromStateData::attnumlist, CopyFormatOptions::binary, COPY_HEADER_MATCH, CopyReadAttributesCSV(), CopyReadAttributesText(), CopyReadLine(), CopyFormatOptions::csv_mode, cur, CopyFromStateData::cur_lineno, ereport, errcode(), errmsg(), ERROR, CopyFormatOptions::header_line, StringInfoData::len, lfirst_int, CopyFromStateData::line_buf, list_length(), NameStr, namestrcmp(), CopyFormatOptions::null_print, CopyFromStateData::opts, CopyFromStateData::raw_fields, CopyFromStateData::rel, RelationGetDescr, and TupleDescAttr.

Referenced by NextCopyFrom().

◆ ProcessCopyOptions()

void ProcessCopyOptions ( ParseState pstate,
CopyFormatOptions opts_out,
bool  is_from,
List options 
)

Definition at line 405 of file copy.c.

409 {
410  bool format_specified = false;
411  bool freeze_specified = false;
412  bool header_specified = false;
413  ListCell *option;
414 
415  /* Support external use for option sanity checking */
416  if (opts_out == NULL)
417  opts_out = (CopyFormatOptions *) palloc0(sizeof(CopyFormatOptions));
418 
419  opts_out->file_encoding = -1;
420 
421  /* Extract options from the statement node tree */
422  foreach(option, options)
423  {
424  DefElem *defel = lfirst_node(DefElem, option);
425 
426  if (strcmp(defel->defname, "format") == 0)
427  {
428  char *fmt = defGetString(defel);
429 
430  if (format_specified)
431  errorConflictingDefElem(defel, pstate);
432  format_specified = true;
433  if (strcmp(fmt, "text") == 0)
434  /* default format */ ;
435  else if (strcmp(fmt, "csv") == 0)
436  opts_out->csv_mode = true;
437  else if (strcmp(fmt, "binary") == 0)
438  opts_out->binary = true;
439  else
440  ereport(ERROR,
441  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
442  errmsg("COPY format \"%s\" not recognized", fmt),
443  parser_errposition(pstate, defel->location)));
444  }
445  else if (strcmp(defel->defname, "freeze") == 0)
446  {
447  if (freeze_specified)
448  errorConflictingDefElem(defel, pstate);
449  freeze_specified = true;
450  opts_out->freeze = defGetBoolean(defel);
451  }
452  else if (strcmp(defel->defname, "delimiter") == 0)
453  {
454  if (opts_out->delim)
455  errorConflictingDefElem(defel, pstate);
456  opts_out->delim = defGetString(defel);
457  }
458  else if (strcmp(defel->defname, "null") == 0)
459  {
460  if (opts_out->null_print)
461  errorConflictingDefElem(defel, pstate);
462  opts_out->null_print = defGetString(defel);
463  }
464  else if (strcmp(defel->defname, "header") == 0)
465  {
466  if (header_specified)
467  errorConflictingDefElem(defel, pstate);
468  header_specified = true;
469  opts_out->header_line = defGetCopyHeaderChoice(defel, is_from);
470  }
471  else if (strcmp(defel->defname, "quote") == 0)
472  {
473  if (opts_out->quote)
474  errorConflictingDefElem(defel, pstate);
475  opts_out->quote = defGetString(defel);
476  }
477  else if (strcmp(defel->defname, "escape") == 0)
478  {
479  if (opts_out->escape)
480  errorConflictingDefElem(defel, pstate);
481  opts_out->escape = defGetString(defel);
482  }
483  else if (strcmp(defel->defname, "force_quote") == 0)
484  {
485  if (opts_out->force_quote || opts_out->force_quote_all)
486  errorConflictingDefElem(defel, pstate);
487  if (defel->arg && IsA(defel->arg, A_Star))
488  opts_out->force_quote_all = true;
489  else if (defel->arg && IsA(defel->arg, List))
490  opts_out->force_quote = castNode(List, defel->arg);
491  else
492  ereport(ERROR,
493  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
494  errmsg("argument to option \"%s\" must be a list of column names",
495  defel->defname),
496  parser_errposition(pstate, defel->location)));
497  }
498  else if (strcmp(defel->defname, "force_not_null") == 0)
499  {
500  if (opts_out->force_notnull)
501  errorConflictingDefElem(defel, pstate);
502  if (defel->arg && IsA(defel->arg, List))
503  opts_out->force_notnull = castNode(List, defel->arg);
504  else
505  ereport(ERROR,
506  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
507  errmsg("argument to option \"%s\" must be a list of column names",
508  defel->defname),
509  parser_errposition(pstate, defel->location)));
510  }
511  else if (strcmp(defel->defname, "force_null") == 0)
512  {
513  if (opts_out->force_null)
514  errorConflictingDefElem(defel, pstate);
515  if (defel->arg && IsA(defel->arg, List))
516  opts_out->force_null = castNode(List, defel->arg);
517  else
518  ereport(ERROR,
519  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
520  errmsg("argument to option \"%s\" must be a list of column names",
521  defel->defname),
522  parser_errposition(pstate, defel->location)));
523  }
524  else if (strcmp(defel->defname, "convert_selectively") == 0)
525  {
526  /*
527  * Undocumented, not-accessible-from-SQL option: convert only the
528  * named columns to binary form, storing the rest as NULLs. It's
529  * allowed for the column list to be NIL.
530  */
531  if (opts_out->convert_selectively)
532  errorConflictingDefElem(defel, pstate);
533  opts_out->convert_selectively = true;
534  if (defel->arg == NULL || IsA(defel->arg, List))
535  opts_out->convert_select = castNode(List, defel->arg);
536  else
537  ereport(ERROR,
538  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
539  errmsg("argument to option \"%s\" must be a list of column names",
540  defel->defname),
541  parser_errposition(pstate, defel->location)));
542  }
543  else if (strcmp(defel->defname, "encoding") == 0)
544  {
545  if (opts_out->file_encoding >= 0)
546  errorConflictingDefElem(defel, pstate);
547  opts_out->file_encoding = pg_char_to_encoding(defGetString(defel));
548  if (opts_out->file_encoding < 0)
549  ereport(ERROR,
550  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
551  errmsg("argument to option \"%s\" must be a valid encoding name",
552  defel->defname),
553  parser_errposition(pstate, defel->location)));
554  }
555  else
556  ereport(ERROR,
557  (errcode(ERRCODE_SYNTAX_ERROR),
558  errmsg("option \"%s\" not recognized",
559  defel->defname),
560  parser_errposition(pstate, defel->location)));
561  }
562 
563  /*
564  * Check for incompatible options (must do these two before inserting
565  * defaults)
566  */
567  if (opts_out->binary && opts_out->delim)
568  ereport(ERROR,
569  (errcode(ERRCODE_SYNTAX_ERROR),
570  errmsg("cannot specify DELIMITER in BINARY mode")));
571 
572  if (opts_out->binary && opts_out->null_print)
573  ereport(ERROR,
574  (errcode(ERRCODE_SYNTAX_ERROR),
575  errmsg("cannot specify NULL in BINARY mode")));
576 
577  /* Set defaults for omitted options */
578  if (!opts_out->delim)
579  opts_out->delim = opts_out->csv_mode ? "," : "\t";
580 
581  if (!opts_out->null_print)
582  opts_out->null_print = opts_out->csv_mode ? "" : "\\N";
583  opts_out->null_print_len = strlen(opts_out->null_print);
584 
585  if (opts_out->csv_mode)
586  {
587  if (!opts_out->quote)
588  opts_out->quote = "\"";
589  if (!opts_out->escape)
590  opts_out->escape = opts_out->quote;
591  }
592 
593  /* Only single-byte delimiter strings are supported. */
594  if (strlen(opts_out->delim) != 1)
595  ereport(ERROR,
596  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
597  errmsg("COPY delimiter must be a single one-byte character")));
598 
599  /* Disallow end-of-line characters */
600  if (strchr(opts_out->delim, '\r') != NULL ||
601  strchr(opts_out->delim, '\n') != NULL)
602  ereport(ERROR,
603  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
604  errmsg("COPY delimiter cannot be newline or carriage return")));
605 
606  if (strchr(opts_out->null_print, '\r') != NULL ||
607  strchr(opts_out->null_print, '\n') != NULL)
608  ereport(ERROR,
609  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
610  errmsg("COPY null representation cannot use newline or carriage return")));
611 
612  /*
613  * Disallow unsafe delimiter characters in non-CSV mode. We can't allow
614  * backslash because it would be ambiguous. We can't allow the other
615  * cases because data characters matching the delimiter must be
616  * backslashed, and certain backslash combinations are interpreted
617  * non-literally by COPY IN. Disallowing all lower case ASCII letters is
618  * more than strictly necessary, but seems best for consistency and
619  * future-proofing. Likewise we disallow all digits though only octal
620  * digits are actually dangerous.
621  */
622  if (!opts_out->csv_mode &&
623  strchr("\\.abcdefghijklmnopqrstuvwxyz0123456789",
624  opts_out->delim[0]) != NULL)
625  ereport(ERROR,
626  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
627  errmsg("COPY delimiter cannot be \"%s\"", opts_out->delim)));
628 
629  /* Check header */
630  if (opts_out->binary && opts_out->header_line)
631  ereport(ERROR,
632  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
633  errmsg("cannot specify HEADER in BINARY mode")));
634 
635  /* Check quote */
636  if (!opts_out->csv_mode && opts_out->quote != NULL)
637  ereport(ERROR,
638  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
639  errmsg("COPY quote available only in CSV mode")));
640 
641  if (opts_out->csv_mode && strlen(opts_out->quote) != 1)
642  ereport(ERROR,
643  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
644  errmsg("COPY quote must be a single one-byte character")));
645 
646  if (opts_out->csv_mode && opts_out->delim[0] == opts_out->quote[0])
647  ereport(ERROR,
648  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
649  errmsg("COPY delimiter and quote must be different")));
650 
651  /* Check escape */
652  if (!opts_out->csv_mode && opts_out->escape != NULL)
653  ereport(ERROR,
654  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
655  errmsg("COPY escape available only in CSV mode")));
656 
657  if (opts_out->csv_mode && strlen(opts_out->escape) != 1)
658  ereport(ERROR,
659  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
660  errmsg("COPY escape must be a single one-byte character")));
661 
662  /* Check force_quote */
663  if (!opts_out->csv_mode && (opts_out->force_quote || opts_out->force_quote_all))
664  ereport(ERROR,
665  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
666  errmsg("COPY force quote available only in CSV mode")));
667  if ((opts_out->force_quote || opts_out->force_quote_all) && is_from)
668  ereport(ERROR,
669  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
670  errmsg("COPY force quote only available using COPY TO")));
671 
672  /* Check force_notnull */
673  if (!opts_out->csv_mode && opts_out->force_notnull != NIL)
674  ereport(ERROR,
675  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
676  errmsg("COPY force not null available only in CSV mode")));
677  if (opts_out->force_notnull != NIL && !is_from)
678  ereport(ERROR,
679  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
680  errmsg("COPY force not null only available using COPY FROM")));
681 
682  /* Check force_null */
683  if (!opts_out->csv_mode && opts_out->force_null != NIL)
684  ereport(ERROR,
685  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
686  errmsg("COPY force null available only in CSV mode")));
687 
688  if (opts_out->force_null != NIL && !is_from)
689  ereport(ERROR,
690  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
691  errmsg("COPY force null only available using COPY FROM")));
692 
693  /* Don't allow the delimiter to appear in the null string. */
694  if (strchr(opts_out->null_print, opts_out->delim[0]) != NULL)
695  ereport(ERROR,
696  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
697  errmsg("COPY delimiter must not appear in the NULL specification")));
698 
699  /* Don't allow the CSV quote char to appear in the null string. */
700  if (opts_out->csv_mode &&
701  strchr(opts_out->null_print, opts_out->quote[0]) != NULL)
702  ereport(ERROR,
703  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
704  errmsg("CSV quote character must not appear in the NULL specification")));
705 }
static CopyHeaderChoice defGetCopyHeaderChoice(DefElem *def, bool is_from)
Definition: copy.c:328
bool defGetBoolean(DefElem *def)
Definition: define.c:108
char * defGetString(DefElem *def)
Definition: define.c:49
void errorConflictingDefElem(DefElem *defel, ParseState *pstate)
Definition: define.c:385
int pg_char_to_encoding(const char *name)
Definition: encnames.c:550
static void const char * fmt
int parser_errposition(ParseState *pstate, int location)
Definition: parse_node.c:110
char * quote
Definition: copy.h:51
char * escape
Definition: copy.h:52
char * defname
Definition: parsenodes.h:779
int location
Definition: parsenodes.h:783
Node * arg
Definition: parsenodes.h:780

References DefElem::arg, CopyFormatOptions::binary, castNode, CopyFormatOptions::convert_select, CopyFormatOptions::convert_selectively, CopyFormatOptions::csv_mode, defGetBoolean(), defGetCopyHeaderChoice(), defGetString(), DefElem::defname, CopyFormatOptions::delim, ereport, errcode(), errmsg(), ERROR, errorConflictingDefElem(), CopyFormatOptions::escape, CopyFormatOptions::file_encoding, fmt, CopyFormatOptions::force_notnull, CopyFormatOptions::force_null, CopyFormatOptions::force_quote, CopyFormatOptions::force_quote_all, CopyFormatOptions::freeze, CopyFormatOptions::header_line, IsA, lfirst_node, DefElem::location, NIL, CopyFormatOptions::null_print, CopyFormatOptions::null_print_len, palloc0(), parser_errposition(), pg_char_to_encoding(), and CopyFormatOptions::quote.

Referenced by BeginCopyFrom(), BeginCopyTo(), and file_fdw_validator().