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copyto.c
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1 /*-------------------------------------------------------------------------
2  *
3  * copyto.c
4  * COPY <table> TO file/program/client
5  *
6  * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
7  * Portions Copyright (c) 1994, Regents of the University of California
8  *
9  *
10  * IDENTIFICATION
11  * src/backend/commands/copyto.c
12  *
13  *-------------------------------------------------------------------------
14  */
15 #include "postgres.h"
16 
17 #include <ctype.h>
18 #include <unistd.h>
19 #include <sys/stat.h>
20 
21 #include "access/heapam.h"
22 #include "access/htup_details.h"
23 #include "access/tableam.h"
24 #include "access/xact.h"
25 #include "access/xlog.h"
26 #include "commands/copy.h"
27 #include "commands/progress.h"
28 #include "executor/execdesc.h"
29 #include "executor/executor.h"
30 #include "executor/tuptable.h"
31 #include "libpq/libpq.h"
32 #include "libpq/pqformat.h"
33 #include "mb/pg_wchar.h"
34 #include "miscadmin.h"
35 #include "optimizer/optimizer.h"
36 #include "pgstat.h"
37 #include "rewrite/rewriteHandler.h"
38 #include "storage/fd.h"
39 #include "tcop/tcopprot.h"
40 #include "utils/lsyscache.h"
41 #include "utils/memutils.h"
42 #include "utils/partcache.h"
43 #include "utils/rel.h"
44 #include "utils/snapmgr.h"
45 
46 /*
47  * Represents the different dest cases we need to worry about at
48  * the bottom level
49  */
50 typedef enum CopyDest
51 {
52  COPY_FILE, /* to file (or a piped program) */
53  COPY_FRONTEND, /* to frontend */
54  COPY_CALLBACK /* to callback function */
56 
57 /*
58  * This struct contains all the state variables used throughout a COPY TO
59  * operation.
60  *
61  * Multi-byte encodings: all supported client-side encodings encode multi-byte
62  * characters by having the first byte's high bit set. Subsequent bytes of the
63  * character can have the high bit not set. When scanning data in such an
64  * encoding to look for a match to a single-byte (ie ASCII) character, we must
65  * use the full pg_encoding_mblen() machinery to skip over multibyte
66  * characters, else we might find a false match to a trailing byte. In
67  * supported server encodings, there is no possibility of a false match, and
68  * it's faster to make useless comparisons to trailing bytes than it is to
69  * invoke pg_encoding_mblen() to skip over them. encoding_embeds_ascii is true
70  * when we have to do it the hard way.
71  */
72 typedef struct CopyToStateData
73 {
74  /* low-level state data */
75  CopyDest copy_dest; /* type of copy source/destination */
76  FILE *copy_file; /* used if copy_dest == COPY_FILE */
77  StringInfo fe_msgbuf; /* used for all dests during COPY TO */
78 
79  int file_encoding; /* file or remote side's character encoding */
80  bool need_transcoding; /* file encoding diff from server? */
81  bool encoding_embeds_ascii; /* ASCII can be non-first byte? */
82 
83  /* parameters from the COPY command */
84  Relation rel; /* relation to copy to */
85  QueryDesc *queryDesc; /* executable query to copy from */
86  List *attnumlist; /* integer list of attnums to copy */
87  char *filename; /* filename, or NULL for STDOUT */
88  bool is_program; /* is 'filename' a program to popen? */
89  copy_data_dest_cb data_dest_cb; /* function for writing data */
90 
92  Node *whereClause; /* WHERE condition (or NULL) */
93 
94  /*
95  * Working state
96  */
97  MemoryContext copycontext; /* per-copy execution context */
98 
99  FmgrInfo *out_functions; /* lookup info for output functions */
100  MemoryContext rowcontext; /* per-row evaluation context */
101  uint64 bytes_processed; /* number of bytes processed so far */
103 
104 /* DestReceiver for COPY (query) TO */
105 typedef struct
106 {
107  DestReceiver pub; /* publicly-known function pointers */
108  CopyToState cstate; /* CopyToStateData for the command */
109  uint64 processed; /* # of tuples processed */
110 } DR_copy;
111 
112 /* NOTE: there's a copy of this in copyfromparse.c */
113 static const char BinarySignature[11] = "PGCOPY\n\377\r\n\0";
114 
115 
116 /* non-export function prototypes */
117 static void EndCopy(CopyToState cstate);
118 static void ClosePipeToProgram(CopyToState cstate);
119 static void CopyOneRowTo(CopyToState cstate, TupleTableSlot *slot);
120 static void CopyAttributeOutText(CopyToState cstate, const char *string);
121 static void CopyAttributeOutCSV(CopyToState cstate, const char *string,
122  bool use_quote, bool single_attr);
123 
124 /* Low-level communications functions */
125 static void SendCopyBegin(CopyToState cstate);
126 static void SendCopyEnd(CopyToState cstate);
127 static void CopySendData(CopyToState cstate, const void *databuf, int datasize);
128 static void CopySendString(CopyToState cstate, const char *str);
129 static void CopySendChar(CopyToState cstate, char c);
130 static void CopySendEndOfRow(CopyToState cstate);
131 static void CopySendInt32(CopyToState cstate, int32 val);
132 static void CopySendInt16(CopyToState cstate, int16 val);
133 
134 
135 /*
136  * Send copy start/stop messages for frontend copies. These have changed
137  * in past protocol redesigns.
138  */
139 static void
141 {
143  int natts = list_length(cstate->attnumlist);
144  int16 format = (cstate->opts.binary ? 1 : 0);
145  int i;
146 
147  pq_beginmessage(&buf, 'H');
148  pq_sendbyte(&buf, format); /* overall format */
149  pq_sendint16(&buf, natts);
150  for (i = 0; i < natts; i++)
151  pq_sendint16(&buf, format); /* per-column formats */
152  pq_endmessage(&buf);
153  cstate->copy_dest = COPY_FRONTEND;
154 }
155 
156 static void
158 {
159  /* Shouldn't have any unsent data */
160  Assert(cstate->fe_msgbuf->len == 0);
161  /* Send Copy Done message */
162  pq_putemptymessage('c');
163 }
164 
165 /*----------
166  * CopySendData sends output data to the destination (file or frontend)
167  * CopySendString does the same for null-terminated strings
168  * CopySendChar does the same for single characters
169  * CopySendEndOfRow does the appropriate thing at end of each data row
170  * (data is not actually flushed except by CopySendEndOfRow)
171  *
172  * NB: no data conversion is applied by these functions
173  *----------
174  */
175 static void
176 CopySendData(CopyToState cstate, const void *databuf, int datasize)
177 {
178  appendBinaryStringInfo(cstate->fe_msgbuf, databuf, datasize);
179 }
180 
181 static void
182 CopySendString(CopyToState cstate, const char *str)
183 {
184  appendBinaryStringInfo(cstate->fe_msgbuf, str, strlen(str));
185 }
186 
187 static void
189 {
191 }
192 
193 static void
195 {
196  StringInfo fe_msgbuf = cstate->fe_msgbuf;
197 
198  switch (cstate->copy_dest)
199  {
200  case COPY_FILE:
201  if (!cstate->opts.binary)
202  {
203  /* Default line termination depends on platform */
204 #ifndef WIN32
205  CopySendChar(cstate, '\n');
206 #else
207  CopySendString(cstate, "\r\n");
208 #endif
209  }
210 
211  if (fwrite(fe_msgbuf->data, fe_msgbuf->len, 1,
212  cstate->copy_file) != 1 ||
213  ferror(cstate->copy_file))
214  {
215  if (cstate->is_program)
216  {
217  if (errno == EPIPE)
218  {
219  /*
220  * The pipe will be closed automatically on error at
221  * the end of transaction, but we might get a better
222  * error message from the subprocess' exit code than
223  * just "Broken Pipe"
224  */
225  ClosePipeToProgram(cstate);
226 
227  /*
228  * If ClosePipeToProgram() didn't throw an error, the
229  * program terminated normally, but closed the pipe
230  * first. Restore errno, and throw an error.
231  */
232  errno = EPIPE;
233  }
234  ereport(ERROR,
236  errmsg("could not write to COPY program: %m")));
237  }
238  else
239  ereport(ERROR,
241  errmsg("could not write to COPY file: %m")));
242  }
243  break;
244  case COPY_FRONTEND:
245  /* The FE/BE protocol uses \n as newline for all platforms */
246  if (!cstate->opts.binary)
247  CopySendChar(cstate, '\n');
248 
249  /* Dump the accumulated row as one CopyData message */
250  (void) pq_putmessage('d', fe_msgbuf->data, fe_msgbuf->len);
251  break;
252  case COPY_CALLBACK:
253  cstate->data_dest_cb(fe_msgbuf->data, fe_msgbuf->len);
254  break;
255  }
256 
257  /* Update the progress */
258  cstate->bytes_processed += fe_msgbuf->len;
260 
261  resetStringInfo(fe_msgbuf);
262 }
263 
264 /*
265  * These functions do apply some data conversion
266  */
267 
268 /*
269  * CopySendInt32 sends an int32 in network byte order
270  */
271 static inline void
273 {
274  uint32 buf;
275 
276  buf = pg_hton32((uint32) val);
277  CopySendData(cstate, &buf, sizeof(buf));
278 }
279 
280 /*
281  * CopySendInt16 sends an int16 in network byte order
282  */
283 static inline void
285 {
286  uint16 buf;
287 
288  buf = pg_hton16((uint16) val);
289  CopySendData(cstate, &buf, sizeof(buf));
290 }
291 
292 /*
293  * Closes the pipe to an external program, checking the pclose() return code.
294  */
295 static void
297 {
298  int pclose_rc;
299 
300  Assert(cstate->is_program);
301 
302  pclose_rc = ClosePipeStream(cstate->copy_file);
303  if (pclose_rc == -1)
304  ereport(ERROR,
306  errmsg("could not close pipe to external command: %m")));
307  else if (pclose_rc != 0)
308  {
309  ereport(ERROR,
310  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
311  errmsg("program \"%s\" failed",
312  cstate->filename),
313  errdetail_internal("%s", wait_result_to_str(pclose_rc))));
314  }
315 }
316 
317 /*
318  * Release resources allocated in a cstate for COPY TO/FROM.
319  */
320 static void
322 {
323  if (cstate->is_program)
324  {
325  ClosePipeToProgram(cstate);
326  }
327  else
328  {
329  if (cstate->filename != NULL && FreeFile(cstate->copy_file))
330  ereport(ERROR,
332  errmsg("could not close file \"%s\": %m",
333  cstate->filename)));
334  }
335 
337 
339  pfree(cstate);
340 }
341 
342 /*
343  * Setup CopyToState to read tuples from a table or a query for COPY TO.
344  *
345  * 'rel': Relation to be copied
346  * 'raw_query': Query whose results are to be copied
347  * 'queryRelId': OID of base relation to convert to a query (for RLS)
348  * 'filename': Name of server-local file to write, NULL for STDOUT
349  * 'is_program': true if 'filename' is program to execute
350  * 'data_dest_cb': Callback that processes the output data
351  * 'attnamelist': List of char *, columns to include. NIL selects all cols.
352  * 'options': List of DefElem. See copy_opt_item in gram.y for selections.
353  *
354  * Returns a CopyToState, to be passed to DoCopyTo() and related functions.
355  */
358  Relation rel,
359  RawStmt *raw_query,
360  Oid queryRelId,
361  const char *filename,
362  bool is_program,
363  copy_data_dest_cb data_dest_cb,
364  List *attnamelist,
365  List *options)
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 
478  if (q->querySource == QSRC_QUAL_INSTEAD_RULE)
479  ereport(ERROR,
480  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
481  errmsg("conditional DO INSTEAD rules are not supported for COPY")));
482  if (q->querySource == QSRC_NON_INSTEAD_RULE)
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 }
723 
724 /*
725  * Clean up storage and release resources for COPY TO.
726  */
727 void
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 }
742 
743 /*
744  * Copy from relation or query TO file.
745  *
746  * Returns the number of rows processed.
747  */
748 uint64
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 }
905 
906 /*
907  * Emit one row during DoCopyTo().
908  */
909 static void
911 {
912  bool need_delim = false;
913  FmgrInfo *out_functions = cstate->out_functions;
914  MemoryContext oldcontext;
915  ListCell *cur;
916  char *string;
917 
919  oldcontext = MemoryContextSwitchTo(cstate->rowcontext);
920 
921  if (cstate->opts.binary)
922  {
923  /* Binary per-tuple header */
924  CopySendInt16(cstate, list_length(cstate->attnumlist));
925  }
926 
927  /* Make sure the tuple is fully deconstructed */
928  slot_getallattrs(slot);
929 
930  foreach(cur, cstate->attnumlist)
931  {
932  int attnum = lfirst_int(cur);
933  Datum value = slot->tts_values[attnum - 1];
934  bool isnull = slot->tts_isnull[attnum - 1];
935 
936  if (!cstate->opts.binary)
937  {
938  if (need_delim)
939  CopySendChar(cstate, cstate->opts.delim[0]);
940  need_delim = true;
941  }
942 
943  if (isnull)
944  {
945  if (!cstate->opts.binary)
946  CopySendString(cstate, cstate->opts.null_print_client);
947  else
948  CopySendInt32(cstate, -1);
949  }
950  else
951  {
952  if (!cstate->opts.binary)
953  {
954  string = OutputFunctionCall(&out_functions[attnum - 1],
955  value);
956  if (cstate->opts.csv_mode)
957  CopyAttributeOutCSV(cstate, string,
958  cstate->opts.force_quote_flags[attnum - 1],
959  list_length(cstate->attnumlist) == 1);
960  else
961  CopyAttributeOutText(cstate, string);
962  }
963  else
964  {
965  bytea *outputbytes;
966 
967  outputbytes = SendFunctionCall(&out_functions[attnum - 1],
968  value);
969  CopySendInt32(cstate, VARSIZE(outputbytes) - VARHDRSZ);
970  CopySendData(cstate, VARDATA(outputbytes),
971  VARSIZE(outputbytes) - VARHDRSZ);
972  }
973  }
974  }
975 
976  CopySendEndOfRow(cstate);
977 
978  MemoryContextSwitchTo(oldcontext);
979 }
980 
981 /*
982  * Send text representation of one attribute, with conversion and escaping
983  */
984 #define DUMPSOFAR() \
985  do { \
986  if (ptr > start) \
987  CopySendData(cstate, start, ptr - start); \
988  } while (0)
989 
990 static void
991 CopyAttributeOutText(CopyToState cstate, const char *string)
992 {
993  const char *ptr;
994  const char *start;
995  char c;
996  char delimc = cstate->opts.delim[0];
997 
998  if (cstate->need_transcoding)
999  ptr = pg_server_to_any(string, strlen(string), cstate->file_encoding);
1000  else
1001  ptr = string;
1002 
1003  /*
1004  * We have to grovel through the string searching for control characters
1005  * and instances of the delimiter character. In most cases, though, these
1006  * are infrequent. To avoid overhead from calling CopySendData once per
1007  * character, we dump out all characters between escaped characters in a
1008  * single call. The loop invariant is that the data from "start" to "ptr"
1009  * can be sent literally, but hasn't yet been.
1010  *
1011  * We can skip pg_encoding_mblen() overhead when encoding is safe, because
1012  * in valid backend encodings, extra bytes of a multibyte character never
1013  * look like ASCII. This loop is sufficiently performance-critical that
1014  * it's worth making two copies of it to get the IS_HIGHBIT_SET() test out
1015  * of the normal safe-encoding path.
1016  */
1017  if (cstate->encoding_embeds_ascii)
1018  {
1019  start = ptr;
1020  while ((c = *ptr) != '\0')
1021  {
1022  if ((unsigned char) c < (unsigned char) 0x20)
1023  {
1024  /*
1025  * \r and \n must be escaped, the others are traditional. We
1026  * prefer to dump these using the C-like notation, rather than
1027  * a backslash and the literal character, because it makes the
1028  * dump file a bit more proof against Microsoftish data
1029  * mangling.
1030  */
1031  switch (c)
1032  {
1033  case '\b':
1034  c = 'b';
1035  break;
1036  case '\f':
1037  c = 'f';
1038  break;
1039  case '\n':
1040  c = 'n';
1041  break;
1042  case '\r':
1043  c = 'r';
1044  break;
1045  case '\t':
1046  c = 't';
1047  break;
1048  case '\v':
1049  c = 'v';
1050  break;
1051  default:
1052  /* If it's the delimiter, must backslash it */
1053  if (c == delimc)
1054  break;
1055  /* All ASCII control chars are length 1 */
1056  ptr++;
1057  continue; /* fall to end of loop */
1058  }
1059  /* if we get here, we need to convert the control char */
1060  DUMPSOFAR();
1061  CopySendChar(cstate, '\\');
1062  CopySendChar(cstate, c);
1063  start = ++ptr; /* do not include char in next run */
1064  }
1065  else if (c == '\\' || c == delimc)
1066  {
1067  DUMPSOFAR();
1068  CopySendChar(cstate, '\\');
1069  start = ptr++; /* we include char in next run */
1070  }
1071  else if (IS_HIGHBIT_SET(c))
1072  ptr += pg_encoding_mblen(cstate->file_encoding, ptr);
1073  else
1074  ptr++;
1075  }
1076  }
1077  else
1078  {
1079  start = ptr;
1080  while ((c = *ptr) != '\0')
1081  {
1082  if ((unsigned char) c < (unsigned char) 0x20)
1083  {
1084  /*
1085  * \r and \n must be escaped, the others are traditional. We
1086  * prefer to dump these using the C-like notation, rather than
1087  * a backslash and the literal character, because it makes the
1088  * dump file a bit more proof against Microsoftish data
1089  * mangling.
1090  */
1091  switch (c)
1092  {
1093  case '\b':
1094  c = 'b';
1095  break;
1096  case '\f':
1097  c = 'f';
1098  break;
1099  case '\n':
1100  c = 'n';
1101  break;
1102  case '\r':
1103  c = 'r';
1104  break;
1105  case '\t':
1106  c = 't';
1107  break;
1108  case '\v':
1109  c = 'v';
1110  break;
1111  default:
1112  /* If it's the delimiter, must backslash it */
1113  if (c == delimc)
1114  break;
1115  /* All ASCII control chars are length 1 */
1116  ptr++;
1117  continue; /* fall to end of loop */
1118  }
1119  /* if we get here, we need to convert the control char */
1120  DUMPSOFAR();
1121  CopySendChar(cstate, '\\');
1122  CopySendChar(cstate, c);
1123  start = ++ptr; /* do not include char in next run */
1124  }
1125  else if (c == '\\' || c == delimc)
1126  {
1127  DUMPSOFAR();
1128  CopySendChar(cstate, '\\');
1129  start = ptr++; /* we include char in next run */
1130  }
1131  else
1132  ptr++;
1133  }
1134  }
1135 
1136  DUMPSOFAR();
1137 }
1138 
1139 /*
1140  * Send text representation of one attribute, with conversion and
1141  * CSV-style escaping
1142  */
1143 static void
1144 CopyAttributeOutCSV(CopyToState cstate, const char *string,
1145  bool use_quote, bool single_attr)
1146 {
1147  const char *ptr;
1148  const char *start;
1149  char c;
1150  char delimc = cstate->opts.delim[0];
1151  char quotec = cstate->opts.quote[0];
1152  char escapec = cstate->opts.escape[0];
1153 
1154  /* force quoting if it matches null_print (before conversion!) */
1155  if (!use_quote && strcmp(string, cstate->opts.null_print) == 0)
1156  use_quote = true;
1157 
1158  if (cstate->need_transcoding)
1159  ptr = pg_server_to_any(string, strlen(string), cstate->file_encoding);
1160  else
1161  ptr = string;
1162 
1163  /*
1164  * Make a preliminary pass to discover if it needs quoting
1165  */
1166  if (!use_quote)
1167  {
1168  /*
1169  * Because '\.' can be a data value, quote it if it appears alone on a
1170  * line so it is not interpreted as the end-of-data marker.
1171  */
1172  if (single_attr && strcmp(ptr, "\\.") == 0)
1173  use_quote = true;
1174  else
1175  {
1176  const char *tptr = ptr;
1177 
1178  while ((c = *tptr) != '\0')
1179  {
1180  if (c == delimc || c == quotec || c == '\n' || c == '\r')
1181  {
1182  use_quote = true;
1183  break;
1184  }
1185  if (IS_HIGHBIT_SET(c) && cstate->encoding_embeds_ascii)
1186  tptr += pg_encoding_mblen(cstate->file_encoding, tptr);
1187  else
1188  tptr++;
1189  }
1190  }
1191  }
1192 
1193  if (use_quote)
1194  {
1195  CopySendChar(cstate, quotec);
1196 
1197  /*
1198  * We adopt the same optimization strategy as in CopyAttributeOutText
1199  */
1200  start = ptr;
1201  while ((c = *ptr) != '\0')
1202  {
1203  if (c == quotec || c == escapec)
1204  {
1205  DUMPSOFAR();
1206  CopySendChar(cstate, escapec);
1207  start = ptr; /* we include char in next run */
1208  }
1209  if (IS_HIGHBIT_SET(c) && cstate->encoding_embeds_ascii)
1210  ptr += pg_encoding_mblen(cstate->file_encoding, ptr);
1211  else
1212  ptr++;
1213  }
1214  DUMPSOFAR();
1215 
1216  CopySendChar(cstate, quotec);
1217  }
1218  else
1219  {
1220  /* If it doesn't need quoting, we can just dump it as-is */
1221  CopySendString(cstate, ptr);
1222  }
1223 }
1224 
1225 /*
1226  * copy_dest_startup --- executor startup
1227  */
1228 static void
1229 copy_dest_startup(DestReceiver *self, int operation, TupleDesc typeinfo)
1230 {
1231  /* no-op */
1232 }
1233 
1234 /*
1235  * copy_dest_receive --- receive one tuple
1236  */
1237 static bool
1239 {
1240  DR_copy *myState = (DR_copy *) self;
1241  CopyToState cstate = myState->cstate;
1242 
1243  /* Send the data */
1244  CopyOneRowTo(cstate, slot);
1245 
1246  /* Increment the number of processed tuples, and report the progress */
1248  ++myState->processed);
1249 
1250  return true;
1251 }
1252 
1253 /*
1254  * copy_dest_shutdown --- executor end
1255  */
1256 static void
1258 {
1259  /* no-op */
1260 }
1261 
1262 /*
1263  * copy_dest_destroy --- release DestReceiver object
1264  */
1265 static void
1267 {
1268  pfree(self);
1269 }
1270 
1271 /*
1272  * CreateCopyDestReceiver -- create a suitable DestReceiver object
1273  */
1274 DestReceiver *
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 }
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_param(int index, int64 val)
void pgstat_progress_update_multi_param(int nparam, const int *index, const int64 *val)
void pgstat_progress_end_command(void)
@ PROGRESS_COMMAND_COPY
#define NameStr(name)
Definition: c.h:730
unsigned short uint16
Definition: c.h:489
unsigned int uint32
Definition: c.h:490
signed short int16
Definition: c.h:477
#define IS_HIGHBIT_SET(ch)
Definition: c.h:1145
signed int int32
Definition: c.h:478
#define VARHDRSZ
Definition: c.h:676
#define PG_BINARY_W
Definition: c.h:1263
static void CopySendInt32(CopyToState cstate, int32 val)
Definition: copyto.c:272
static void ClosePipeToProgram(CopyToState cstate)
Definition: copyto.c:296
static bool copy_dest_receive(TupleTableSlot *slot, DestReceiver *self)
Definition: copyto.c:1238
uint64 DoCopyTo(CopyToState cstate)
Definition: copyto.c:749
static void CopyAttributeOutText(CopyToState cstate, const char *string)
Definition: copyto.c:991
struct CopyToStateData CopyToStateData
#define DUMPSOFAR()
Definition: copyto.c:984
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 EndCopy(CopyToState cstate)
Definition: copyto.c:321
static void copy_dest_destroy(DestReceiver *self)
Definition: copyto.c:1266
CopyDest
Definition: copyto.c:51
@ COPY_FILE
Definition: copyto.c:52
@ COPY_CALLBACK
Definition: copyto.c:54
@ COPY_FRONTEND
Definition: copyto.c:53
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
static void CopyAttributeOutCSV(CopyToState cstate, const char *string, bool use_quote, bool single_attr)
Definition: copyto.c:1144
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
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 void CopySendString(CopyToState cstate, const char *str)
Definition: copyto.c:182
static const char BinarySignature[11]
Definition: copyto.c:113
void EndCopyTo(CopyToState cstate)
Definition: copyto.c:728
DestReceiver * CreateCopyDestReceiver(void)
Definition: copyto.c:1275
DestReceiver * CreateDestReceiver(CommandDest dest)
Definition: dest.c:113
@ DestRemote
Definition: dest.h:89
@ DestCopyOut
Definition: dest.h:95
struct cursor * cur
Definition: ecpg.c:28
int errdetail_internal(const char *fmt,...)
Definition: elog.c:1229
int errcode_for_file_access(void)
Definition: elog.c:881
int errhint(const char *fmt,...)
Definition: elog.c:1316
int errcode(int sqlerrcode)
Definition: elog.c:858
int errmsg(const char *fmt,...)
Definition: elog.c:1069
#define PG_TRY(...)
Definition: elog.h:370
#define PG_END_TRY(...)
Definition: elog.h:395
#define ERROR
Definition: elog.h:39
#define PG_FINALLY(...)
Definition: elog.h:387
#define ereport(elevel,...)
Definition: elog.h:149
void ExecutorEnd(QueryDesc *queryDesc)
Definition: execMain.c:462
void ExecutorFinish(QueryDesc *queryDesc)
Definition: execMain.c:402
void ExecutorStart(QueryDesc *queryDesc, int eflags)
Definition: execMain.c:132
void ExecutorRun(QueryDesc *queryDesc, ScanDirection direction, uint64 count, bool execute_once)
Definition: execMain.c:301
void ExecDropSingleTupleTableSlot(TupleTableSlot *slot)
Definition: execTuples.c:1254
FILE * AllocateFile(const char *name, const char *mode)
Definition: fd.c:2383
int ClosePipeStream(FILE *file)
Definition: fd.c:2791
int FreeFile(FILE *file)
Definition: fd.c:2581
FILE * OpenPipeStream(const char *command, const char *mode)
Definition: fd.c:2486
void fmgr_info(Oid functionId, FmgrInfo *finfo)
Definition: fmgr.c:127
bytea * SendFunctionCall(FmgrInfo *flinfo, Datum val)
Definition: fmgr.c:1731
char * OutputFunctionCall(FmgrInfo *flinfo, Datum val)
Definition: fmgr.c:1670
void(* copy_data_dest_cb)(void *data, int len)
Definition: copy.h:69
static struct @143 value
long val
Definition: informix.c:664
int i
Definition: isn.c:73
#define pq_putmessage(msgtype, s, len)
Definition: libpq.h:49
Assert(fmt[strlen(fmt) - 1] !='\n')
bool list_member_int(const List *list, int datum)
Definition: list.c:701
bool list_member_oid(const List *list, Oid datum)
Definition: list.c:721
void getTypeBinaryOutputInfo(Oid type, Oid *typSend, bool *typIsVarlena)
Definition: lsyscache.c:2931
void getTypeOutputInfo(Oid type, Oid *typOutput, bool *typIsVarlena)
Definition: lsyscache.c:2865
int GetDatabaseEncoding(void)
Definition: mbutils.c:1268
int pg_database_encoding_max_length(void)
Definition: mbutils.c:1553
int pg_get_client_encoding(void)
Definition: mbutils.c:337
char * pg_server_to_any(const char *s, int len, int encoding)
Definition: mbutils.c:750
void MemoryContextReset(MemoryContext context)
Definition: mcxt.c:314
char * pstrdup(const char *in)
Definition: mcxt.c:1624
void pfree(void *pointer)
Definition: mcxt.c:1436
void * palloc0(Size size)
Definition: mcxt.c:1241
MemoryContext CurrentMemoryContext
Definition: mcxt.c:135
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:387
void * palloc(Size size)
Definition: mcxt.c:1210
#define AllocSetContextCreate
Definition: memutils.h:129
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:153
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:121
#define IsA(nodeptr, _type_)
Definition: nodes.h:179
@ CMD_INSERT
Definition: nodes.h:278
@ CMD_DELETE
Definition: nodes.h:279
@ CMD_UPDATE
Definition: nodes.h:277
@ CMD_SELECT
Definition: nodes.h:276
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:138
@ QSRC_NON_INSTEAD_RULE
Definition: parsenodes.h:47
@ QSRC_QUAL_INSTEAD_RULE
Definition: parsenodes.h:46
#define CURSOR_OPT_PARALLEL_OK
Definition: parsenodes.h:3011
NameData attname
Definition: pg_attribute.h:41
int16 attnum
Definition: pg_attribute.h:83
FormData_pg_attribute * Form_pg_attribute
Definition: pg_attribute.h:207
static char format
#define pg_hton32(x)
Definition: pg_bswap.h:121
#define pg_hton16(x)
Definition: pg_bswap.h:120
static char * filename
Definition: pg_dumpall.c:119
#define lfirst_node(type, lc)
Definition: pg_list.h:176
static int list_length(const List *l)
Definition: pg_list.h:152
#define linitial_node(type, l)
Definition: pg_list.h:181
#define NIL
Definition: pg_list.h:68
#define lfirst_int(lc)
Definition: pg_list.h:173
static char * buf
Definition: pg_test_fsync.c:67
#define PG_ENCODING_IS_CLIENT_ONLY(_enc)
Definition: pg_wchar.h:284
#define is_absolute_path(filename)
Definition: port.h:103
CommandDest whereToSendOutput
Definition: postgres.c:84
List * pg_analyze_and_rewrite_fixedparams(RawStmt *parsetree, const char *query_string, const Oid *paramTypes, int numParams, QueryEnvironment *queryEnv)
Definition: postgres.c:637
PlannedStmt * pg_plan_query(Query *querytree, const char *query_string, int cursorOptions, ParamListInfo boundParams)
Definition: postgres.c:852
uintptr_t Datum
Definition: postgres.h:64
#define InvalidOid
Definition: postgres_ext.h:36
unsigned int Oid
Definition: postgres_ext.h:31
void pq_putemptymessage(char msgtype)
Definition: pqformat.c:391
void pq_endmessage(StringInfo buf)
Definition: pqformat.c:299
void pq_beginmessage(StringInfo buf, char msgtype)
Definition: pqformat.c:88
static void pq_sendbyte(StringInfo buf, uint8 byt)
Definition: pqformat.h:161
static void pq_sendint16(StringInfo buf, uint16 i)
Definition: pqformat.h:137
void FreeQueryDesc(QueryDesc *qdesc)
Definition: pquery.c:105
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
char * c
char string[11]
Definition: preproc-type.c:52
#define PROGRESS_COPY_COMMAND
Definition: progress.h:141
#define PROGRESS_COPY_TYPE_FILE
Definition: progress.h:149
#define PROGRESS_COPY_BYTES_PROCESSED
Definition: progress.h:137
#define PROGRESS_COPY_COMMAND_TO
Definition: progress.h:146
#define PROGRESS_COPY_TUPLES_PROCESSED
Definition: progress.h:139
#define PROGRESS_COPY_TYPE
Definition: progress.h:142
#define PROGRESS_COPY_TYPE_PROGRAM
Definition: progress.h:150
#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
@ ForwardScanDirection
Definition: sdir.h:28
void UpdateActiveSnapshotCommandId(void)
Definition: snapmgr.c:747
void PopActiveSnapshot(void)
Definition: snapmgr.c:778
void PushCopiedSnapshot(Snapshot snapshot)
Definition: snapmgr.c:735
Snapshot GetActiveSnapshot(void)
Definition: snapmgr.c:805
#define InvalidSnapshot
Definition: snapshot.h:123
StringInfo makeStringInfo(void)
Definition: stringinfo.c:41
void resetStringInfo(StringInfo str)
Definition: stringinfo.c:75
void appendBinaryStringInfo(StringInfo str, const void *data, int datalen)
Definition: stringinfo.c:227
#define appendStringInfoCharMacro(str, ch)
Definition: stringinfo.h:128
bool force_quote_all
Definition: copy.h:54
bool binary
Definition: copy.h:43
int null_print_len
Definition: copy.h:48
char * quote
Definition: copy.h:51
CopyHeaderChoice header_line
Definition: copy.h:46
List * force_quote
Definition: copy.h:53
char * escape
Definition: copy.h:52
char * null_print
Definition: copy.h:47
char * delim
Definition: copy.h:50
bool * force_quote_flags
Definition: copy.h:55
char * null_print_client
Definition: copy.h:49
bool csv_mode
Definition: copy.h:45
int file_encoding
Definition: copy.h:41
FmgrInfo * out_functions
Definition: copyto.c:99
MemoryContext copycontext
Definition: copyto.c:97
Node * whereClause
Definition: copyto.c:92
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
MemoryContext rowcontext
Definition: copyto.c:100
CopyFormatOptions opts
Definition: copyto.c:91
uint64 bytes_processed
Definition: copyto.c:101
StringInfo fe_msgbuf
Definition: copyto.c:77
char * filename
Definition: copyto.c:87
List * attnumlist
Definition: copyto.c:86
QueryDesc * queryDesc
Definition: copyto.c:85
CopyToState cstate
Definition: copyto.c:108
DestReceiver pub
Definition: copyto.c:107
uint64 processed
Definition: copyto.c:109
Definition: fmgr.h:57
Definition: pg_list.h:54
Definition: nodes.h:129
const char * p_sourcetext
Definition: parse_node.h:192
List * relationOids
Definition: plannodes.h:93
DestReceiver * dest
Definition: execdesc.h:41
TupleDesc tupDesc
Definition: execdesc.h:47
List * returningList
Definition: parsenodes.h:196
CmdType commandType
Definition: parsenodes.h:128
Node * utilityStmt
Definition: parsenodes.h:143
Form_pg_class rd_rel
Definition: rel.h:110
bool * tts_isnull
Definition: tuptable.h:128
Datum * tts_values
Definition: tuptable.h:126
unsigned short st_mode
Definition: win32_port.h:270
Definition: c.h:671
TupleTableSlot * table_slot_create(Relation relation, List **reglist)
Definition: tableam.c:91
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
#define TupleDescAttr(tupdesc, i)
Definition: tupdesc.h:92
static void slot_getallattrs(TupleTableSlot *slot)
Definition: tuptable.h:362
#define VARDATA(PTR)
Definition: varatt.h:278
#define VARSIZE(PTR)
Definition: varatt.h:279
char * wait_result_to_str(int exitstatus)
Definition: wait_error.c:33
int pg_encoding_mblen(int encoding, const char *mbstr)
Definition: wchar.c:2130
#define S_IWOTH
Definition: win32_port.h:318
#define S_ISDIR(m)
Definition: win32_port.h:327
#define fstat
Definition: win32_port.h:285
#define S_IWGRP
Definition: win32_port.h:306