PostgreSQL Source Code  git master
postgres_fdw.h File Reference
#include "foreign/foreign.h"
#include "lib/stringinfo.h"
#include "libpq-fe.h"
#include "nodes/execnodes.h"
#include "nodes/pathnodes.h"
#include "utils/relcache.h"
Include dependency graph for postgres_fdw.h:
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Data Structures

struct  PgFdwRelationInfo
 
struct  PgFdwConnState
 

Typedefs

typedef struct PgFdwRelationInfo PgFdwRelationInfo
 
typedef struct PgFdwConnState PgFdwConnState
 

Functions

int set_transmission_modes (void)
 
void reset_transmission_modes (int nestlevel)
 
void process_pending_request (AsyncRequest *areq)
 
PGconnGetConnection (UserMapping *user, bool will_prep_stmt, PgFdwConnState **state)
 
void ReleaseConnection (PGconn *conn)
 
unsigned int GetCursorNumber (PGconn *conn)
 
unsigned int GetPrepStmtNumber (PGconn *conn)
 
void do_sql_command (PGconn *conn, const char *sql)
 
PGresultpgfdw_get_result (PGconn *conn, const char *query)
 
PGresultpgfdw_exec_query (PGconn *conn, const char *query, PgFdwConnState *state)
 
void pgfdw_report_error (int elevel, PGresult *res, PGconn *conn, bool clear, const char *sql)
 
int ExtractConnectionOptions (List *defelems, const char **keywords, const char **values)
 
ListExtractExtensionList (const char *extensionsString, bool warnOnMissing)
 
char * process_pgfdw_appname (const char *appname)
 
void classifyConditions (PlannerInfo *root, RelOptInfo *baserel, List *input_conds, List **remote_conds, List **local_conds)
 
bool is_foreign_expr (PlannerInfo *root, RelOptInfo *baserel, Expr *expr)
 
bool is_foreign_param (PlannerInfo *root, RelOptInfo *baserel, Expr *expr)
 
bool is_foreign_pathkey (PlannerInfo *root, RelOptInfo *baserel, PathKey *pathkey)
 
void deparseInsertSql (StringInfo buf, RangeTblEntry *rte, Index rtindex, Relation rel, List *targetAttrs, bool doNothing, List *withCheckOptionList, List *returningList, List **retrieved_attrs, int *values_end_len)
 
void rebuildInsertSql (StringInfo buf, Relation rel, char *orig_query, List *target_attrs, int values_end_len, int num_params, int num_rows)
 
void deparseUpdateSql (StringInfo buf, RangeTblEntry *rte, Index rtindex, Relation rel, List *targetAttrs, List *withCheckOptionList, List *returningList, List **retrieved_attrs)
 
void deparseDirectUpdateSql (StringInfo buf, PlannerInfo *root, Index rtindex, Relation rel, RelOptInfo *foreignrel, List *targetlist, List *targetAttrs, List *remote_conds, List **params_list, List *returningList, List **retrieved_attrs)
 
void deparseDeleteSql (StringInfo buf, RangeTblEntry *rte, Index rtindex, Relation rel, List *returningList, List **retrieved_attrs)
 
void deparseDirectDeleteSql (StringInfo buf, PlannerInfo *root, Index rtindex, Relation rel, RelOptInfo *foreignrel, List *remote_conds, List **params_list, List *returningList, List **retrieved_attrs)
 
void deparseAnalyzeSizeSql (StringInfo buf, Relation rel)
 
void deparseAnalyzeSql (StringInfo buf, Relation rel, List **retrieved_attrs)
 
void deparseTruncateSql (StringInfo buf, List *rels, DropBehavior behavior, bool restart_seqs)
 
void deparseStringLiteral (StringInfo buf, const char *val)
 
EquivalenceMemberfind_em_for_rel (PlannerInfo *root, EquivalenceClass *ec, RelOptInfo *rel)
 
EquivalenceMemberfind_em_for_rel_target (PlannerInfo *root, EquivalenceClass *ec, RelOptInfo *rel)
 
Listbuild_tlist_to_deparse (RelOptInfo *foreignrel)
 
void deparseSelectStmtForRel (StringInfo buf, PlannerInfo *root, RelOptInfo *rel, List *tlist, List *remote_conds, List *pathkeys, bool has_final_sort, bool has_limit, bool is_subquery, List **retrieved_attrs, List **params_list)
 
const char * get_jointype_name (JoinType jointype)
 
bool is_builtin (Oid objectId)
 
bool is_shippable (Oid objectId, Oid classId, PgFdwRelationInfo *fpinfo)
 

Variables

char * pgfdw_application_name
 

Typedef Documentation

◆ PgFdwConnState

◆ PgFdwRelationInfo

Function Documentation

◆ build_tlist_to_deparse()

List* build_tlist_to_deparse ( RelOptInfo foreignrel)

Definition at line 1172 of file deparse.c.

1173 {
1174  List *tlist = NIL;
1175  PgFdwRelationInfo *fpinfo = (PgFdwRelationInfo *) foreignrel->fdw_private;
1176  ListCell *lc;
1177 
1178  /*
1179  * For an upper relation, we have already built the target list while
1180  * checking shippability, so just return that.
1181  */
1182  if (IS_UPPER_REL(foreignrel))
1183  return fpinfo->grouped_tlist;
1184 
1185  /*
1186  * We require columns specified in foreignrel->reltarget->exprs and those
1187  * required for evaluating the local conditions.
1188  */
1189  tlist = add_to_flat_tlist(tlist,
1190  pull_var_clause((Node *) foreignrel->reltarget->exprs,
1192  foreach(lc, fpinfo->local_conds)
1193  {
1194  RestrictInfo *rinfo = lfirst_node(RestrictInfo, lc);
1195 
1196  tlist = add_to_flat_tlist(tlist,
1197  pull_var_clause((Node *) rinfo->clause,
1199  }
1200 
1201  return tlist;
1202 }
if(TABLE==NULL||TABLE_index==NULL)
Definition: isn.c:77
#define PVC_RECURSE_PLACEHOLDERS
Definition: optimizer.h:188
#define IS_UPPER_REL(rel)
Definition: pathnodes.h:793
#define lfirst_node(type, lc)
Definition: pg_list.h:174
#define NIL
Definition: pg_list.h:66
Definition: pg_list.h:52
Definition: nodes.h:112
List * exprs
Definition: pathnodes.h:1415
struct PathTarget * reltarget
Definition: pathnodes.h:837
Expr * clause
Definition: pathnodes.h:2423
List * add_to_flat_tlist(List *tlist, List *exprs)
Definition: tlist.c:132
List * pull_var_clause(Node *node, int flags)
Definition: var.c:597

References add_to_flat_tlist(), RestrictInfo::clause, PathTarget::exprs, PgFdwRelationInfo::grouped_tlist, if(), IS_UPPER_REL, lfirst_node, PgFdwRelationInfo::local_conds, NIL, pull_var_clause(), PVC_RECURSE_PLACEHOLDERS, and RelOptInfo::reltarget.

Referenced by estimate_path_cost_size(), and postgresGetForeignPlan().

◆ classifyConditions()

void classifyConditions ( PlannerInfo root,
RelOptInfo baserel,
List input_conds,
List **  remote_conds,
List **  local_conds 
)

Definition at line 214 of file deparse.c.

219 {
220  ListCell *lc;
221 
222  *remote_conds = NIL;
223  *local_conds = NIL;
224 
225  foreach(lc, input_conds)
226  {
228 
229  if (is_foreign_expr(root, baserel, ri->clause))
230  *remote_conds = lappend(*remote_conds, ri);
231  else
232  *local_conds = lappend(*local_conds, ri);
233  }
234 }
bool is_foreign_expr(PlannerInfo *root, RelOptInfo *baserel, Expr *expr)
Definition: deparse.c:240
List * lappend(List *list, void *datum)
Definition: list.c:338

References RestrictInfo::clause, is_foreign_expr(), lappend(), lfirst_node, and NIL.

Referenced by estimate_path_cost_size(), and postgresGetForeignRelSize().

◆ deparseAnalyzeSizeSql()

void deparseAnalyzeSizeSql ( StringInfo  buf,
Relation  rel 
)

Definition at line 2357 of file deparse.c.

2358 {
2360 
2361  /* We'll need the remote relation name as a literal. */
2363  deparseRelation(&relname, rel);
2364 
2365  appendStringInfoString(buf, "SELECT pg_catalog.pg_relation_size(");
2367  appendStringInfo(buf, "::pg_catalog.regclass) / %d", BLCKSZ);
2368 }
void deparseStringLiteral(StringInfo buf, const char *val)
Definition: deparse.c:2638
static void deparseRelation(StringInfo buf, Relation rel)
Definition: deparse.c:2598
NameData relname
Definition: pg_class.h:38
static char * buf
Definition: pg_test_fsync.c:67
void appendStringInfo(StringInfo str, const char *fmt,...)
Definition: stringinfo.c:91
void appendStringInfoString(StringInfo str, const char *s)
Definition: stringinfo.c:176
void initStringInfo(StringInfo str)
Definition: stringinfo.c:59
char data[NAMEDATALEN]
Definition: c.h:678

References appendStringInfo(), appendStringInfoString(), buf, nameData::data, deparseRelation(), deparseStringLiteral(), initStringInfo(), and relname.

Referenced by postgresAnalyzeForeignTable().

◆ deparseAnalyzeSql()

void deparseAnalyzeSql ( StringInfo  buf,
Relation  rel,
List **  retrieved_attrs 
)

Definition at line 2377 of file deparse.c.

2378 {
2379  Oid relid = RelationGetRelid(rel);
2380  TupleDesc tupdesc = RelationGetDescr(rel);
2381  int i;
2382  char *colname;
2383  List *options;
2384  ListCell *lc;
2385  bool first = true;
2386 
2387  *retrieved_attrs = NIL;
2388 
2389  appendStringInfoString(buf, "SELECT ");
2390  for (i = 0; i < tupdesc->natts; i++)
2391  {
2392  /* Ignore dropped columns. */
2393  if (TupleDescAttr(tupdesc, i)->attisdropped)
2394  continue;
2395 
2396  if (!first)
2397  appendStringInfoString(buf, ", ");
2398  first = false;
2399 
2400  /* Use attribute name or column_name option. */
2401  colname = NameStr(TupleDescAttr(tupdesc, i)->attname);
2402  options = GetForeignColumnOptions(relid, i + 1);
2403 
2404  foreach(lc, options)
2405  {
2406  DefElem *def = (DefElem *) lfirst(lc);
2407 
2408  if (strcmp(def->defname, "column_name") == 0)
2409  {
2410  colname = defGetString(def);
2411  break;
2412  }
2413  }
2414 
2416 
2417  *retrieved_attrs = lappend_int(*retrieved_attrs, i + 1);
2418  }
2419 
2420  /* Don't generate bad syntax for zero-column relation. */
2421  if (first)
2422  appendStringInfoString(buf, "NULL");
2423 
2424  /*
2425  * Construct FROM clause
2426  */
2427  appendStringInfoString(buf, " FROM ");
2428  deparseRelation(buf, rel);
2429 }
#define NameStr(name)
Definition: c.h:682
char * defGetString(DefElem *def)
Definition: define.c:49
List * GetForeignColumnOptions(Oid relid, AttrNumber attnum)
Definition: foreign.c:288
int i
Definition: isn.c:73
List * lappend_int(List *list, int datum)
Definition: list.c:356
NameData attname
Definition: pg_attribute.h:41
#define lfirst(lc)
Definition: pg_list.h:170
static char ** options
unsigned int Oid
Definition: postgres_ext.h:31
#define RelationGetRelid(relation)
Definition: rel.h:501
#define RelationGetDescr(relation)
Definition: rel.h:527
const char * quote_identifier(const char *ident)
Definition: ruleutils.c:11529
char * defname
Definition: parsenodes.h:777
#define TupleDescAttr(tupdesc, i)
Definition: tupdesc.h:92

References appendStringInfoString(), attname, buf, defGetString(), DefElem::defname, deparseRelation(), GetForeignColumnOptions(), i, lappend_int(), lfirst, NameStr, TupleDescData::natts, NIL, options, quote_identifier(), RelationGetDescr, RelationGetRelid, and TupleDescAttr.

Referenced by postgresAcquireSampleRowsFunc().

◆ deparseDeleteSql()

void deparseDeleteSql ( StringInfo  buf,
RangeTblEntry rte,
Index  rtindex,
Relation  rel,
List returningList,
List **  retrieved_attrs 
)

Definition at line 2220 of file deparse.c.

2224 {
2225  appendStringInfoString(buf, "DELETE FROM ");
2226  deparseRelation(buf, rel);
2227  appendStringInfoString(buf, " WHERE ctid = $1");
2228 
2229  deparseReturningList(buf, rte, rtindex, rel,
2230  rel->trigdesc && rel->trigdesc->trig_delete_after_row,
2231  NIL, returningList, retrieved_attrs);
2232 }
static void deparseReturningList(StringInfo buf, RangeTblEntry *rte, Index rtindex, Relation rel, bool trig_after_row, List *withCheckOptionList, List *returningList, List **retrieved_attrs)
Definition: deparse.c:2300
TriggerDesc * trigdesc
Definition: rel.h:116
bool trig_delete_after_row
Definition: reltrigger.h:67

References appendStringInfoString(), buf, deparseRelation(), deparseReturningList(), NIL, TriggerDesc::trig_delete_after_row, and RelationData::trigdesc.

Referenced by postgresPlanForeignModify().

◆ deparseDirectDeleteSql()

void deparseDirectDeleteSql ( StringInfo  buf,
PlannerInfo root,
Index  rtindex,
Relation  rel,
RelOptInfo foreignrel,
List remote_conds,
List **  params_list,
List returningList,
List **  retrieved_attrs 
)

Definition at line 2249 of file deparse.c.

2256 {
2257  deparse_expr_cxt context;
2258 
2259  /* Set up context struct for recursion */
2260  context.root = root;
2261  context.foreignrel = foreignrel;
2262  context.scanrel = foreignrel;
2263  context.buf = buf;
2264  context.params_list = params_list;
2265 
2266  appendStringInfoString(buf, "DELETE FROM ");
2267  deparseRelation(buf, rel);
2268  if (foreignrel->reloptkind == RELOPT_JOINREL)
2269  appendStringInfo(buf, " %s%d", REL_ALIAS_PREFIX, rtindex);
2270 
2271  if (foreignrel->reloptkind == RELOPT_JOINREL)
2272  {
2273  List *ignore_conds = NIL;
2274 
2275  appendStringInfoString(buf, " USING ");
2276  deparseFromExprForRel(buf, root, foreignrel, true, rtindex,
2277  &ignore_conds, params_list);
2278  remote_conds = list_concat(remote_conds, ignore_conds);
2279  }
2280 
2281  if (remote_conds)
2282  {
2283  appendStringInfoString(buf, " WHERE ");
2284  appendConditions(remote_conds, &context);
2285  }
2286 
2287  if (foreignrel->reloptkind == RELOPT_JOINREL)
2288  deparseExplicitTargetList(returningList, true, retrieved_attrs,
2289  &context);
2290  else
2291  deparseReturningList(buf, planner_rt_fetch(rtindex, root),
2292  rtindex, rel, false,
2293  NIL, returningList, retrieved_attrs);
2294 }
#define REL_ALIAS_PREFIX
Definition: deparse.c:110
static void appendConditions(List *exprs, deparse_expr_cxt *context)
Definition: deparse.c:1569
static void deparseExplicitTargetList(List *tlist, bool is_returning, List **retrieved_attrs, deparse_expr_cxt *context)
Definition: deparse.c:1640
static void deparseFromExprForRel(StringInfo buf, PlannerInfo *root, RelOptInfo *foreignrel, bool use_alias, Index ignore_rel, List **ignore_conds, List **params_list)
Definition: deparse.c:1717
List * list_concat(List *list1, const List *list2)
Definition: list.c:560
#define planner_rt_fetch(rti, root)
Definition: pathnodes.h:514
@ RELOPT_JOINREL
Definition: pathnodes.h:771
RelOptKind reloptkind
Definition: pathnodes.h:809
PlannerInfo * root
Definition: deparse.c:101
List ** params_list
Definition: deparse.c:107
RelOptInfo * foreignrel
Definition: deparse.c:102
StringInfo buf
Definition: deparse.c:106
RelOptInfo * scanrel
Definition: deparse.c:103

References appendConditions(), appendStringInfo(), appendStringInfoString(), deparse_expr_cxt::buf, buf, deparseExplicitTargetList(), deparseFromExprForRel(), deparseRelation(), deparseReturningList(), deparse_expr_cxt::foreignrel, list_concat(), NIL, deparse_expr_cxt::params_list, planner_rt_fetch, REL_ALIAS_PREFIX, RELOPT_JOINREL, RelOptInfo::reloptkind, deparse_expr_cxt::root, and deparse_expr_cxt::scanrel.

Referenced by postgresPlanDirectModify().

◆ deparseDirectUpdateSql()

void deparseDirectUpdateSql ( StringInfo  buf,
PlannerInfo root,
Index  rtindex,
Relation  rel,
RelOptInfo foreignrel,
List targetlist,
List targetAttrs,
List remote_conds,
List **  params_list,
List returningList,
List **  retrieved_attrs 
)

Definition at line 2135 of file deparse.c.

2144 {
2145  deparse_expr_cxt context;
2146  int nestlevel;
2147  bool first;
2148  RangeTblEntry *rte = planner_rt_fetch(rtindex, root);
2149  ListCell *lc,
2150  *lc2;
2151 
2152  /* Set up context struct for recursion */
2153  context.root = root;
2154  context.foreignrel = foreignrel;
2155  context.scanrel = foreignrel;
2156  context.buf = buf;
2157  context.params_list = params_list;
2158 
2159  appendStringInfoString(buf, "UPDATE ");
2160  deparseRelation(buf, rel);
2161  if (foreignrel->reloptkind == RELOPT_JOINREL)
2162  appendStringInfo(buf, " %s%d", REL_ALIAS_PREFIX, rtindex);
2163  appendStringInfoString(buf, " SET ");
2164 
2165  /* Make sure any constants in the exprs are printed portably */
2166  nestlevel = set_transmission_modes();
2167 
2168  first = true;
2169  forboth(lc, targetlist, lc2, targetAttrs)
2170  {
2171  TargetEntry *tle = lfirst_node(TargetEntry, lc);
2172  int attnum = lfirst_int(lc2);
2173 
2174  /* update's new-value expressions shouldn't be resjunk */
2175  Assert(!tle->resjunk);
2176 
2177  if (!first)
2178  appendStringInfoString(buf, ", ");
2179  first = false;
2180 
2181  deparseColumnRef(buf, rtindex, attnum, rte, false);
2182  appendStringInfoString(buf, " = ");
2183  deparseExpr((Expr *) tle->expr, &context);
2184  }
2185 
2186  reset_transmission_modes(nestlevel);
2187 
2188  if (foreignrel->reloptkind == RELOPT_JOINREL)
2189  {
2190  List *ignore_conds = NIL;
2191 
2192  appendStringInfoString(buf, " FROM ");
2193  deparseFromExprForRel(buf, root, foreignrel, true, rtindex,
2194  &ignore_conds, params_list);
2195  remote_conds = list_concat(remote_conds, ignore_conds);
2196  }
2197 
2198  if (remote_conds)
2199  {
2200  appendStringInfoString(buf, " WHERE ");
2201  appendConditions(remote_conds, &context);
2202  }
2203 
2204  if (foreignrel->reloptkind == RELOPT_JOINREL)
2205  deparseExplicitTargetList(returningList, true, retrieved_attrs,
2206  &context);
2207  else
2208  deparseReturningList(buf, rte, rtindex, rel, false,
2209  NIL, returningList, retrieved_attrs);
2210 }
static void deparseColumnRef(StringInfo buf, int varno, int varattno, RangeTblEntry *rte, bool qualify_col)
Definition: deparse.c:2470
static void deparseExpr(Expr *node, deparse_expr_cxt *context)
Definition: deparse.c:2673
Assert(fmt[strlen(fmt) - 1] !='\n')
int16 attnum
Definition: pg_attribute.h:83
#define forboth(cell1, list1, cell2, list2)
Definition: pg_list.h:465
#define lfirst_int(lc)
Definition: pg_list.h:171
void reset_transmission_modes(int nestlevel)
int set_transmission_modes(void)
Expr * expr
Definition: primnodes.h:1555
bool resjunk
Definition: primnodes.h:1562

References appendConditions(), appendStringInfo(), appendStringInfoString(), Assert(), attnum, deparse_expr_cxt::buf, buf, deparseColumnRef(), deparseExplicitTargetList(), deparseExpr(), deparseFromExprForRel(), deparseRelation(), deparseReturningList(), TargetEntry::expr, forboth, deparse_expr_cxt::foreignrel, lfirst_int, lfirst_node, list_concat(), NIL, deparse_expr_cxt::params_list, planner_rt_fetch, REL_ALIAS_PREFIX, RELOPT_JOINREL, RelOptInfo::reloptkind, reset_transmission_modes(), TargetEntry::resjunk, deparse_expr_cxt::root, deparse_expr_cxt::scanrel, and set_transmission_modes().

Referenced by postgresPlanDirectModify().

◆ deparseInsertSql()

void deparseInsertSql ( StringInfo  buf,
RangeTblEntry rte,
Index  rtindex,
Relation  rel,
List targetAttrs,
bool  doNothing,
List withCheckOptionList,
List returningList,
List **  retrieved_attrs,
int *  values_end_len 
)

Definition at line 1942 of file deparse.c.

1947 {
1948  TupleDesc tupdesc = RelationGetDescr(rel);
1949  AttrNumber pindex;
1950  bool first;
1951  ListCell *lc;
1952 
1953  appendStringInfoString(buf, "INSERT INTO ");
1954  deparseRelation(buf, rel);
1955 
1956  if (targetAttrs)
1957  {
1958  appendStringInfoChar(buf, '(');
1959 
1960  first = true;
1961  foreach(lc, targetAttrs)
1962  {
1963  int attnum = lfirst_int(lc);
1964 
1965  if (!first)
1966  appendStringInfoString(buf, ", ");
1967  first = false;
1968 
1969  deparseColumnRef(buf, rtindex, attnum, rte, false);
1970  }
1971 
1972  appendStringInfoString(buf, ") VALUES (");
1973 
1974  pindex = 1;
1975  first = true;
1976  foreach(lc, targetAttrs)
1977  {
1978  int attnum = lfirst_int(lc);
1979  Form_pg_attribute attr = TupleDescAttr(tupdesc, attnum - 1);
1980 
1981  if (!first)
1982  appendStringInfoString(buf, ", ");
1983  first = false;
1984 
1985  if (attr->attgenerated)
1986  appendStringInfoString(buf, "DEFAULT");
1987  else
1988  {
1989  appendStringInfo(buf, "$%d", pindex);
1990  pindex++;
1991  }
1992  }
1993 
1994  appendStringInfoChar(buf, ')');
1995  }
1996  else
1997  appendStringInfoString(buf, " DEFAULT VALUES");
1998  *values_end_len = buf->len;
1999 
2000  if (doNothing)
2001  appendStringInfoString(buf, " ON CONFLICT DO NOTHING");
2002 
2003  deparseReturningList(buf, rte, rtindex, rel,
2004  rel->trigdesc && rel->trigdesc->trig_insert_after_row,
2005  withCheckOptionList, returningList, retrieved_attrs);
2006 }
int16 AttrNumber
Definition: attnum.h:21
FormData_pg_attribute * Form_pg_attribute
Definition: pg_attribute.h:207
void appendStringInfoChar(StringInfo str, char ch)
Definition: stringinfo.c:188
bool trig_insert_after_row
Definition: reltrigger.h:57

References appendStringInfo(), appendStringInfoChar(), appendStringInfoString(), attnum, buf, deparseColumnRef(), deparseRelation(), deparseReturningList(), lfirst_int, RelationGetDescr, TriggerDesc::trig_insert_after_row, RelationData::trigdesc, and TupleDescAttr.

Referenced by postgresBeginForeignInsert(), and postgresPlanForeignModify().

◆ deparseSelectStmtForRel()

void deparseSelectStmtForRel ( StringInfo  buf,
PlannerInfo root,
RelOptInfo rel,
List tlist,
List remote_conds,
List pathkeys,
bool  has_final_sort,
bool  has_limit,
bool  is_subquery,
List **  retrieved_attrs,
List **  params_list 
)

Definition at line 1229 of file deparse.c.

1233 {
1234  deparse_expr_cxt context;
1235  PgFdwRelationInfo *fpinfo = (PgFdwRelationInfo *) rel->fdw_private;
1236  List *quals;
1237 
1238  /*
1239  * We handle relations for foreign tables, joins between those and upper
1240  * relations.
1241  */
1242  Assert(IS_JOIN_REL(rel) || IS_SIMPLE_REL(rel) || IS_UPPER_REL(rel));
1243 
1244  /* Fill portions of context common to upper, join and base relation */
1245  context.buf = buf;
1246  context.root = root;
1247  context.foreignrel = rel;
1248  context.scanrel = IS_UPPER_REL(rel) ? fpinfo->outerrel : rel;
1249  context.params_list = params_list;
1250 
1251  /* Construct SELECT clause */
1252  deparseSelectSql(tlist, is_subquery, retrieved_attrs, &context);
1253 
1254  /*
1255  * For upper relations, the WHERE clause is built from the remote
1256  * conditions of the underlying scan relation; otherwise, we can use the
1257  * supplied list of remote conditions directly.
1258  */
1259  if (IS_UPPER_REL(rel))
1260  {
1261  PgFdwRelationInfo *ofpinfo;
1262 
1263  ofpinfo = (PgFdwRelationInfo *) fpinfo->outerrel->fdw_private;
1264  quals = ofpinfo->remote_conds;
1265  }
1266  else
1267  quals = remote_conds;
1268 
1269  /* Construct FROM and WHERE clauses */
1270  deparseFromExpr(quals, &context);
1271 
1272  if (IS_UPPER_REL(rel))
1273  {
1274  /* Append GROUP BY clause */
1275  appendGroupByClause(tlist, &context);
1276 
1277  /* Append HAVING clause */
1278  if (remote_conds)
1279  {
1280  appendStringInfoString(buf, " HAVING ");
1281  appendConditions(remote_conds, &context);
1282  }
1283  }
1284 
1285  /* Add ORDER BY clause if we found any useful pathkeys */
1286  if (pathkeys)
1287  appendOrderByClause(pathkeys, has_final_sort, &context);
1288 
1289  /* Add LIMIT clause if necessary */
1290  if (has_limit)
1291  appendLimitClause(&context);
1292 
1293  /* Add any necessary FOR UPDATE/SHARE. */
1294  deparseLockingClause(&context);
1295 }
static void appendGroupByClause(List *tlist, deparse_expr_cxt *context)
Definition: deparse.c:3651
static void deparseFromExpr(List *quals, deparse_expr_cxt *context)
Definition: deparse.c:1369
static void deparseLockingClause(deparse_expr_cxt *context)
Definition: deparse.c:1479
static void appendOrderByClause(List *pathkeys, bool has_final_sort, deparse_expr_cxt *context)
Definition: deparse.c:3692
static void appendLimitClause(deparse_expr_cxt *context)
Definition: deparse.c:3769
static void deparseSelectSql(List *tlist, bool is_subquery, List **retrieved_attrs, deparse_expr_cxt *context)
Definition: deparse.c:1311
#define IS_SIMPLE_REL(rel)
Definition: pathnodes.h:783
#define IS_JOIN_REL(rel)
Definition: pathnodes.h:788
RelOptInfo * outerrel
Definition: postgres_fdw.h:102

References appendConditions(), appendGroupByClause(), appendLimitClause(), appendOrderByClause(), appendStringInfoString(), Assert(), deparse_expr_cxt::buf, buf, deparseFromExpr(), deparseLockingClause(), deparseSelectSql(), deparse_expr_cxt::foreignrel, IS_JOIN_REL, IS_SIMPLE_REL, IS_UPPER_REL, PgFdwRelationInfo::outerrel, deparse_expr_cxt::params_list, PgFdwRelationInfo::remote_conds, deparse_expr_cxt::root, and deparse_expr_cxt::scanrel.

Referenced by deparseRangeTblRef(), estimate_path_cost_size(), and postgresGetForeignPlan().

◆ deparseStringLiteral()

void deparseStringLiteral ( StringInfo  buf,
const char *  val 
)

Definition at line 2638 of file deparse.c.

2639 {
2640  const char *valptr;
2641 
2642  /*
2643  * Rather than making assumptions about the remote server's value of
2644  * standard_conforming_strings, always use E'foo' syntax if there are any
2645  * backslashes. This will fail on remote servers before 8.1, but those
2646  * are long out of support.
2647  */
2648  if (strchr(val, '\\') != NULL)
2650  appendStringInfoChar(buf, '\'');
2651  for (valptr = val; *valptr; valptr++)
2652  {
2653  char ch = *valptr;
2654 
2655  if (SQL_STR_DOUBLE(ch, true))
2658  }
2659  appendStringInfoChar(buf, '\'');
2660 }
#define ESCAPE_STRING_SYNTAX
Definition: c.h:1105
#define SQL_STR_DOUBLE(ch, escape_backslash)
Definition: c.h:1102
long val
Definition: informix.c:664

References appendStringInfoChar(), buf, ESCAPE_STRING_SYNTAX, SQL_STR_DOUBLE, and val.

Referenced by deparseAnalyzeSizeSql(), deparseConst(), and postgresImportForeignSchema().

◆ deparseTruncateSql()

void deparseTruncateSql ( StringInfo  buf,
List rels,
DropBehavior  behavior,
bool  restart_seqs 
)

Definition at line 2435 of file deparse.c.

2439 {
2440  ListCell *cell;
2441 
2442  appendStringInfoString(buf, "TRUNCATE ");
2443 
2444  foreach(cell, rels)
2445  {
2446  Relation rel = lfirst(cell);
2447 
2448  if (cell != list_head(rels))
2449  appendStringInfoString(buf, ", ");
2450 
2451  deparseRelation(buf, rel);
2452  }
2453 
2454  appendStringInfo(buf, " %s IDENTITY",
2455  restart_seqs ? "RESTART" : "CONTINUE");
2456 
2457  if (behavior == DROP_RESTRICT)
2458  appendStringInfoString(buf, " RESTRICT");
2459  else if (behavior == DROP_CASCADE)
2460  appendStringInfoString(buf, " CASCADE");
2461 }
@ DROP_CASCADE
Definition: parsenodes.h:1936
@ DROP_RESTRICT
Definition: parsenodes.h:1935
static ListCell * list_head(const List *l)
Definition: pg_list.h:126

References appendStringInfo(), appendStringInfoString(), buf, deparseRelation(), DROP_CASCADE, DROP_RESTRICT, lfirst, and list_head().

Referenced by postgresExecForeignTruncate().

◆ deparseUpdateSql()

void deparseUpdateSql ( StringInfo  buf,
RangeTblEntry rte,
Index  rtindex,
Relation  rel,
List targetAttrs,
List withCheckOptionList,
List returningList,
List **  retrieved_attrs 
)

Definition at line 2075 of file deparse.c.

2080 {
2081  TupleDesc tupdesc = RelationGetDescr(rel);
2082  AttrNumber pindex;
2083  bool first;
2084  ListCell *lc;
2085 
2086  appendStringInfoString(buf, "UPDATE ");
2087  deparseRelation(buf, rel);
2088  appendStringInfoString(buf, " SET ");
2089 
2090  pindex = 2; /* ctid is always the first param */
2091  first = true;
2092  foreach(lc, targetAttrs)
2093  {
2094  int attnum = lfirst_int(lc);
2095  Form_pg_attribute attr = TupleDescAttr(tupdesc, attnum - 1);
2096 
2097  if (!first)
2098  appendStringInfoString(buf, ", ");
2099  first = false;
2100 
2101  deparseColumnRef(buf, rtindex, attnum, rte, false);
2102  if (attr->attgenerated)
2103  appendStringInfoString(buf, " = DEFAULT");
2104  else
2105  {
2106  appendStringInfo(buf, " = $%d", pindex);
2107  pindex++;
2108  }
2109  }
2110  appendStringInfoString(buf, " WHERE ctid = $1");
2111 
2112  deparseReturningList(buf, rte, rtindex, rel,
2113  rel->trigdesc && rel->trigdesc->trig_update_after_row,
2114  withCheckOptionList, returningList, retrieved_attrs);
2115 }
bool trig_update_after_row
Definition: reltrigger.h:62

References appendStringInfo(), appendStringInfoString(), attnum, buf, deparseColumnRef(), deparseRelation(), deparseReturningList(), lfirst_int, RelationGetDescr, TriggerDesc::trig_update_after_row, RelationData::trigdesc, and TupleDescAttr.

Referenced by postgresPlanForeignModify().

◆ do_sql_command()

void do_sql_command ( PGconn conn,
const char *  sql 
)

Definition at line 638 of file connection.c.

639 {
641  do_sql_command_end(conn, sql, false);
642 }
static void do_sql_command_end(PGconn *conn, const char *sql, bool consume_input)
Definition: connection.c:652
static void do_sql_command_begin(PGconn *conn, const char *sql)
Definition: connection.c:645
PGconn * conn
Definition: streamutil.c:54

References conn, do_sql_command_begin(), and do_sql_command_end().

Referenced by begin_remote_xact(), configure_remote_session(), pgfdw_subxact_callback(), pgfdw_xact_callback(), and postgresExecForeignTruncate().

◆ ExtractConnectionOptions()

int ExtractConnectionOptions ( List defelems,
const char **  keywords,
const char **  values 
)

Definition at line 385 of file option.c.

387 {
388  ListCell *lc;
389  int i;
390 
391  /* Build our options lists if we didn't yet. */
393 
394  i = 0;
395  foreach(lc, defelems)
396  {
397  DefElem *d = (DefElem *) lfirst(lc);
398 
399  if (is_libpq_option(d->defname))
400  {
401  keywords[i] = d->defname;
402  values[i] = defGetString(d);
403  i++;
404  }
405  }
406  return i;
407 }
static Datum values[MAXATTR]
Definition: bootstrap.c:156
static bool is_libpq_option(const char *keyword)
Definition: option.c:364
static void InitPgFdwOptions(void)
Definition: option.c:222

References defGetString(), DefElem::defname, i, InitPgFdwOptions(), is_libpq_option(), lfirst, and values.

Referenced by connect_pg_server().

◆ ExtractExtensionList()

List* ExtractExtensionList ( const char *  extensionsString,
bool  warnOnMissing 
)

Definition at line 416 of file option.c.

417 {
418  List *extensionOids = NIL;
419  List *extlist;
420  ListCell *lc;
421 
422  /* SplitIdentifierString scribbles on its input, so pstrdup first */
423  if (!SplitIdentifierString(pstrdup(extensionsString), ',', &extlist))
424  {
425  /* syntax error in name list */
426  ereport(ERROR,
427  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
428  errmsg("parameter \"%s\" must be a list of extension names",
429  "extensions")));
430  }
431 
432  foreach(lc, extlist)
433  {
434  const char *extension_name = (const char *) lfirst(lc);
435  Oid extension_oid = get_extension_oid(extension_name, true);
436 
437  if (OidIsValid(extension_oid))
438  {
439  extensionOids = lappend_oid(extensionOids, extension_oid);
440  }
441  else if (warnOnMissing)
442  {
444  (errcode(ERRCODE_UNDEFINED_OBJECT),
445  errmsg("extension \"%s\" is not installed",
446  extension_name)));
447  }
448  }
449 
450  list_free(extlist);
451  return extensionOids;
452 }
#define OidIsValid(objectId)
Definition: c.h:711
int errcode(int sqlerrcode)
Definition: elog.c:695
int errmsg(const char *fmt,...)
Definition: elog.c:906
#define WARNING
Definition: elog.h:32
#define ERROR
Definition: elog.h:35
#define ereport(elevel,...)
Definition: elog.h:145
Oid get_extension_oid(const char *extname, bool missing_ok)
Definition: extension.c:142
List * lappend_oid(List *list, Oid datum)
Definition: list.c:374
void list_free(List *list)
Definition: list.c:1545
char * pstrdup(const char *in)
Definition: mcxt.c:1483
bool SplitIdentifierString(char *rawstring, char separator, List **namelist)
Definition: varlena.c:3712

References ereport, errcode(), errmsg(), ERROR, get_extension_oid(), lappend_oid(), lfirst, list_free(), NIL, OidIsValid, pstrdup(), SplitIdentifierString(), and WARNING.

Referenced by apply_server_options(), and postgres_fdw_validator().

◆ find_em_for_rel()

EquivalenceMember* find_em_for_rel ( PlannerInfo root,
EquivalenceClass ec,
RelOptInfo rel 
)

Definition at line 7466 of file postgres_fdw.c.

7467 {
7468  ListCell *lc;
7469 
7470  foreach(lc, ec->ec_members)
7471  {
7473 
7474  /*
7475  * Note we require !bms_is_empty, else we'd accept constant
7476  * expressions which are not suitable for the purpose.
7477  */
7478  if (bms_is_subset(em->em_relids, rel->relids) &&
7479  !bms_is_empty(em->em_relids) &&
7480  is_foreign_expr(root, rel, em->em_expr))
7481  return em;
7482  }
7483 
7484  return NULL;
7485 }
bool bms_is_subset(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:316
bool bms_is_empty(const Bitmapset *a)
Definition: bitmapset.c:704
Relids relids
Definition: pathnodes.h:815

References bms_is_empty(), bms_is_subset(), EquivalenceClass::ec_members, EquivalenceMember::em_expr, EquivalenceMember::em_relids, is_foreign_expr(), lfirst, and RelOptInfo::relids.

Referenced by appendOrderByClause(), get_useful_pathkeys_for_relation(), and is_foreign_pathkey().

◆ find_em_for_rel_target()

EquivalenceMember* find_em_for_rel_target ( PlannerInfo root,
EquivalenceClass ec,
RelOptInfo rel 
)

Definition at line 7499 of file postgres_fdw.c.

7501 {
7502  PathTarget *target = rel->reltarget;
7503  ListCell *lc1;
7504  int i;
7505 
7506  i = 0;
7507  foreach(lc1, target->exprs)
7508  {
7509  Expr *expr = (Expr *) lfirst(lc1);
7510  Index sgref = get_pathtarget_sortgroupref(target, i);
7511  ListCell *lc2;
7512 
7513  /* Ignore non-sort expressions */
7514  if (sgref == 0 ||
7516  root->parse->sortClause) == NULL)
7517  {
7518  i++;
7519  continue;
7520  }
7521 
7522  /* We ignore binary-compatible relabeling on both ends */
7523  while (expr && IsA(expr, RelabelType))
7524  expr = ((RelabelType *) expr)->arg;
7525 
7526  /* Locate an EquivalenceClass member matching this expr, if any */
7527  foreach(lc2, ec->ec_members)
7528  {
7530  Expr *em_expr;
7531 
7532  /* Don't match constants */
7533  if (em->em_is_const)
7534  continue;
7535 
7536  /* Ignore child members */
7537  if (em->em_is_child)
7538  continue;
7539 
7540  /* Match if same expression (after stripping relabel) */
7541  em_expr = em->em_expr;
7542  while (em_expr && IsA(em_expr, RelabelType))
7543  em_expr = ((RelabelType *) em_expr)->arg;
7544 
7545  if (!equal(em_expr, expr))
7546  continue;
7547 
7548  /* Check that expression (including relabels!) is shippable */
7549  if (is_foreign_expr(root, rel, em->em_expr))
7550  return em;
7551  }
7552 
7553  i++;
7554  }
7555 
7556  return NULL;
7557 }
unsigned int Index
Definition: c.h:550
bool equal(const void *a, const void *b)
Definition: equalfuncs.c:225
#define IsA(nodeptr, _type_)
Definition: nodes.h:162
#define get_pathtarget_sortgroupref(target, colno)
Definition: pathnodes.h:1431
void * arg
Query * parse
Definition: pathnodes.h:196
List * sortClause
Definition: parsenodes.h:181
SortGroupClause * get_sortgroupref_clause_noerr(Index sortref, List *clauses)
Definition: tlist.c:443

References arg, EquivalenceClass::ec_members, EquivalenceMember::em_expr, EquivalenceMember::em_is_child, EquivalenceMember::em_is_const, equal(), PathTarget::exprs, get_pathtarget_sortgroupref, get_sortgroupref_clause_noerr(), i, is_foreign_expr(), IsA, lfirst, PlannerInfo::parse, RelOptInfo::reltarget, and Query::sortClause.

Referenced by add_foreign_ordered_paths(), and appendOrderByClause().

◆ get_jointype_name()

const char* get_jointype_name ( JoinType  jointype)

Definition at line 1603 of file deparse.c.

1604 {
1605  switch (jointype)
1606  {
1607  case JOIN_INNER:
1608  return "INNER";
1609 
1610  case JOIN_LEFT:
1611  return "LEFT";
1612 
1613  case JOIN_RIGHT:
1614  return "RIGHT";
1615 
1616  case JOIN_FULL:
1617  return "FULL";
1618 
1619  default:
1620  /* Shouldn't come here, but protect from buggy code. */
1621  elog(ERROR, "unsupported join type %d", jointype);
1622  }
1623 
1624  /* Keep compiler happy */
1625  return NULL;
1626 }
@ JOIN_FULL
Definition: nodes.h:289
@ JOIN_INNER
Definition: nodes.h:287
@ JOIN_RIGHT
Definition: nodes.h:290
@ JOIN_LEFT
Definition: nodes.h:288

References elog(), ERROR, JOIN_FULL, JOIN_INNER, JOIN_LEFT, and JOIN_RIGHT.

Referenced by deparseFromExprForRel(), and foreign_join_ok().

◆ GetConnection()

PGconn* GetConnection ( UserMapping user,
bool  will_prep_stmt,
PgFdwConnState **  state 
)

Definition at line 134 of file connection.c.

135 {
136  bool found;
137  bool retry = false;
138  ConnCacheEntry *entry;
141 
142  /* First time through, initialize connection cache hashtable */
143  if (ConnectionHash == NULL)
144  {
145  HASHCTL ctl;
146 
147  ctl.keysize = sizeof(ConnCacheKey);
148  ctl.entrysize = sizeof(ConnCacheEntry);
149  ConnectionHash = hash_create("postgres_fdw connections", 8,
150  &ctl,
152 
153  /*
154  * Register some callback functions that manage connection cleanup.
155  * This should be done just once in each backend.
156  */
163  }
164 
165  /* Set flag that we did GetConnection during the current transaction */
166  xact_got_connection = true;
167 
168  /* Create hash key for the entry. Assume no pad bytes in key struct */
169  key = user->umid;
170 
171  /*
172  * Find or create cached entry for requested connection.
173  */
174  entry = hash_search(ConnectionHash, &key, HASH_ENTER, &found);
175  if (!found)
176  {
177  /*
178  * We need only clear "conn" here; remaining fields will be filled
179  * later when "conn" is set.
180  */
181  entry->conn = NULL;
182  }
183 
184  /* Reject further use of connections which failed abort cleanup. */
186 
187  /*
188  * If the connection needs to be remade due to invalidation, disconnect as
189  * soon as we're out of all transactions.
190  */
191  if (entry->conn != NULL && entry->invalidated && entry->xact_depth == 0)
192  {
193  elog(DEBUG3, "closing connection %p for option changes to take effect",
194  entry->conn);
195  disconnect_pg_server(entry);
196  }
197 
198  /*
199  * If cache entry doesn't have a connection, we have to establish a new
200  * connection. (If connect_pg_server throws an error, the cache entry
201  * will remain in a valid empty state, ie conn == NULL.)
202  */
203  if (entry->conn == NULL)
204  make_new_connection(entry, user);
205 
206  /*
207  * We check the health of the cached connection here when using it. In
208  * cases where we're out of all transactions, if a broken connection is
209  * detected, we try to reestablish a new connection later.
210  */
211  PG_TRY();
212  {
213  /* Process a pending asynchronous request if any. */
214  if (entry->state.pendingAreq)
216  /* Start a new transaction or subtransaction if needed. */
217  begin_remote_xact(entry);
218  }
219  PG_CATCH();
220  {
222  ErrorData *errdata = CopyErrorData();
223 
224  /*
225  * Determine whether to try to reestablish the connection.
226  *
227  * After a broken connection is detected in libpq, any error other
228  * than connection failure (e.g., out-of-memory) can be thrown
229  * somewhere between return from libpq and the expected ereport() call
230  * in pgfdw_report_error(). In this case, since PQstatus() indicates
231  * CONNECTION_BAD, checking only PQstatus() causes the false detection
232  * of connection failure. To avoid this, we also verify that the
233  * error's sqlstate is ERRCODE_CONNECTION_FAILURE. Note that also
234  * checking only the sqlstate can cause another false detection
235  * because pgfdw_report_error() may report ERRCODE_CONNECTION_FAILURE
236  * for any libpq-originated error condition.
237  */
238  if (errdata->sqlerrcode != ERRCODE_CONNECTION_FAILURE ||
239  PQstatus(entry->conn) != CONNECTION_BAD ||
240  entry->xact_depth > 0)
241  {
242  MemoryContextSwitchTo(ecxt);
243  PG_RE_THROW();
244  }
245 
246  /* Clean up the error state */
247  FlushErrorState();
248  FreeErrorData(errdata);
249  errdata = NULL;
250 
251  retry = true;
252  }
253  PG_END_TRY();
254 
255  /*
256  * If a broken connection is detected, disconnect it, reestablish a new
257  * connection and retry a new remote transaction. If connection failure is
258  * reported again, we give up getting a connection.
259  */
260  if (retry)
261  {
262  Assert(entry->xact_depth == 0);
263 
264  ereport(DEBUG3,
265  (errmsg_internal("could not start remote transaction on connection %p",
266  entry->conn)),
267  errdetail_internal("%s", pchomp(PQerrorMessage(entry->conn))));
268 
269  elog(DEBUG3, "closing connection %p to reestablish a new one",
270  entry->conn);
271  disconnect_pg_server(entry);
272 
273  if (entry->conn == NULL)
274  make_new_connection(entry, user);
275 
276  begin_remote_xact(entry);
277  }
278 
279  /* Remember if caller will prepare statements */
280  entry->have_prep_stmt |= will_prep_stmt;
281 
282  /* If caller needs access to the per-connection state, return it. */
283  if (state)
284  *state = &entry->state;
285 
286  return entry->conn;
287 }
Oid ConnCacheKey
Definition: connection.c:49
static void disconnect_pg_server(ConnCacheEntry *entry)
Definition: connection.c:527
static bool xact_got_connection
Definition: connection.c:81
struct ConnCacheEntry ConnCacheEntry
static HTAB * ConnectionHash
Definition: connection.c:74
static void make_new_connection(ConnCacheEntry *entry, UserMapping *user)
Definition: connection.c:294
static void pgfdw_subxact_callback(SubXactEvent event, SubTransactionId mySubid, SubTransactionId parentSubid, void *arg)
Definition: connection.c:1051
static void pgfdw_reject_incomplete_xact_state_change(ConnCacheEntry *entry)
Definition: connection.c:1196
static void pgfdw_inval_callback(Datum arg, int cacheid, uint32 hashvalue)
Definition: connection.c:1146
static void pgfdw_xact_callback(XactEvent event, void *arg)
Definition: connection.c:921
static void begin_remote_xact(ConnCacheEntry *entry)
Definition: connection.c:681
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:953
HTAB * hash_create(const char *tabname, long nelem, const HASHCTL *info, int flags)
Definition: dynahash.c:350
int errmsg_internal(const char *fmt,...)
Definition: elog.c:993
void FreeErrorData(ErrorData *edata)
Definition: elog.c:1613
int errdetail_internal(const char *fmt,...)
Definition: elog.c:1066
void FlushErrorState(void)
Definition: elog.c:1651
ErrorData * CopyErrorData(void)
Definition: elog.c:1557
#define PG_RE_THROW()
Definition: elog.h:350
#define DEBUG3
Definition: elog.h:24
#define PG_TRY(...)
Definition: elog.h:309
#define PG_END_TRY(...)
Definition: elog.h:334
#define PG_CATCH(...)
Definition: elog.h:319
char * PQerrorMessage(const PGconn *conn)
Definition: fe-connect.c:6743
ConnStatusType PQstatus(const PGconn *conn)
Definition: fe-connect.c:6690
@ HASH_ENTER
Definition: hsearch.h:114
#define HASH_ELEM
Definition: hsearch.h:95
#define HASH_BLOBS
Definition: hsearch.h:97
void CacheRegisterSyscacheCallback(int cacheid, SyscacheCallbackFunction func, Datum arg)
Definition: inval.c:1519
@ CONNECTION_BAD
Definition: libpq-fe.h:61
char * pchomp(const char *in)
Definition: mcxt.c:1511
MemoryContext CurrentMemoryContext
Definition: mcxt.c:124
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:135
static char * user
Definition: pg_regress.c:93
uintptr_t Datum
Definition: postgres.h:412
void process_pending_request(AsyncRequest *areq)
PGconn * conn
Definition: connection.c:54
bool have_prep_stmt
Definition: connection.c:58
PgFdwConnState state
Definition: connection.c:68
bool invalidated
Definition: connection.c:62
int sqlerrcode
Definition: elog.h:377
Size keysize
Definition: hsearch.h:75
Size entrysize
Definition: hsearch.h:76
AsyncRequest * pendingAreq
Definition: postgres_fdw.h:134
Definition: regguts.h:318
@ FOREIGNSERVEROID
Definition: syscache.h:64
@ USERMAPPINGOID
Definition: syscache.h:115
void RegisterXactCallback(XactCallback callback, void *arg)
Definition: xact.c:3630
void RegisterSubXactCallback(SubXactCallback callback, void *arg)
Definition: xact.c:3690

References Assert(), begin_remote_xact(), CacheRegisterSyscacheCallback(), ConnCacheEntry::conn, CONNECTION_BAD, ConnectionHash, CopyErrorData(), CurrentMemoryContext, DEBUG3, disconnect_pg_server(), elog(), HASHCTL::entrysize, ereport, errdetail_internal(), errmsg_internal(), FlushErrorState(), FOREIGNSERVEROID, FreeErrorData(), HASH_BLOBS, hash_create(), HASH_ELEM, HASH_ENTER, hash_search(), ConnCacheEntry::have_prep_stmt, ConnCacheEntry::invalidated, sort-test::key, HASHCTL::keysize, make_new_connection(), MemoryContextSwitchTo(), pchomp(), PgFdwConnState::pendingAreq, PG_CATCH, PG_END_TRY, PG_RE_THROW, PG_TRY, pgfdw_inval_callback(), pgfdw_reject_incomplete_xact_state_change(), pgfdw_subxact_callback(), pgfdw_xact_callback(), PQerrorMessage(), PQstatus(), process_pending_request(), RegisterSubXactCallback(), RegisterXactCallback(), ErrorData::sqlerrcode, ConnCacheEntry::state, user, USERMAPPINGOID, ConnCacheEntry::xact_depth, and xact_got_connection.

Referenced by create_foreign_modify(), dumpBlobs(), dumpDatabase(), dumpDatabaseConfig(), dumpTableData_copy(), estimate_path_cost_size(), expand_extension_name_patterns(), expand_foreign_server_name_patterns(), expand_schema_name_patterns(), expand_table_name_patterns(), getTables(), main(), postgresAcquireSampleRowsFunc(), postgresAnalyzeForeignTable(), postgresBeginDirectModify(), postgresBeginForeignScan(), postgresExecForeignTruncate(), postgresImportForeignSchema(), setup_connection(), StartLogStreamer(), StreamLog(), and StreamLogicalLog().

◆ GetCursorNumber()

unsigned int GetCursorNumber ( PGconn conn)

Definition at line 745 of file connection.c.

746 {
747  return ++cursor_number;
748 }
static unsigned int cursor_number
Definition: connection.c:77

References cursor_number.

Referenced by postgresAcquireSampleRowsFunc(), and postgresBeginForeignScan().

◆ GetPrepStmtNumber()

unsigned int GetPrepStmtNumber ( PGconn conn)

Definition at line 759 of file connection.c.

760 {
761  return ++prep_stmt_number;
762 }
static unsigned int prep_stmt_number
Definition: connection.c:78

References prep_stmt_number.

Referenced by prepare_foreign_modify().

◆ is_builtin()

bool is_builtin ( Oid  objectId)

Definition at line 152 of file shippable.c.

153 {
154  return (objectId < FirstGenbkiObjectId);
155 }
#define FirstGenbkiObjectId
Definition: transam.h:195

References FirstGenbkiObjectId.

Referenced by deparse_type_name(), and is_shippable().

◆ is_foreign_expr()

bool is_foreign_expr ( PlannerInfo root,
RelOptInfo baserel,
Expr expr 
)

Definition at line 240 of file deparse.c.

243 {
244  foreign_glob_cxt glob_cxt;
245  foreign_loc_cxt loc_cxt;
246  PgFdwRelationInfo *fpinfo = (PgFdwRelationInfo *) (baserel->fdw_private);
247 
248  /*
249  * Check that the expression consists of nodes that are safe to execute
250  * remotely.
251  */
252  glob_cxt.root = root;
253  glob_cxt.foreignrel = baserel;
254 
255  /*
256  * For an upper relation, use relids from its underneath scan relation,
257  * because the upperrel's own relids currently aren't set to anything
258  * meaningful by the core code. For other relation, use their own relids.
259  */
260  if (IS_UPPER_REL(baserel))
261  glob_cxt.relids = fpinfo->outerrel->relids;
262  else
263  glob_cxt.relids = baserel->relids;
264  loc_cxt.collation = InvalidOid;
265  loc_cxt.state = FDW_COLLATE_NONE;
266  if (!foreign_expr_walker((Node *) expr, &glob_cxt, &loc_cxt, NULL))
267  return false;
268 
269  /*
270  * If the expression has a valid collation that does not arise from a
271  * foreign var, the expression can not be sent over.
272  */
273  if (loc_cxt.state == FDW_COLLATE_UNSAFE)
274  return false;
275 
276  /*
277  * An expression which includes any mutable functions can't be sent over
278  * because its result is not stable. For example, sending now() remote
279  * side could cause confusion from clock offsets. Future versions might
280  * be able to make this choice with more granularity. (We check this last
281  * because it requires a lot of expensive catalog lookups.)
282  */
283  if (contain_mutable_functions((Node *) expr))
284  return false;
285 
286  /* OK to evaluate on the remote server */
287  return true;
288 }
bool contain_mutable_functions(Node *clause)
Definition: clauses.c:365
@ FDW_COLLATE_UNSAFE
Definition: deparse.c:86
@ FDW_COLLATE_NONE
Definition: deparse.c:82
static bool foreign_expr_walker(Node *node, foreign_glob_cxt *glob_cxt, foreign_loc_cxt *outer_cxt, foreign_loc_cxt *case_arg_cxt)
Definition: deparse.c:308
#define InvalidOid
Definition: postgres_ext.h:36
RelOptInfo * foreignrel
Definition: deparse.c:71
Relids relids
Definition: deparse.c:72
PlannerInfo * root
Definition: deparse.c:70
FDWCollateState state
Definition: deparse.c:93

References foreign_loc_cxt::collation, contain_mutable_functions(), FDW_COLLATE_NONE, FDW_COLLATE_UNSAFE, foreign_expr_walker(), foreign_glob_cxt::foreignrel, if(), InvalidOid, IS_UPPER_REL, PgFdwRelationInfo::outerrel, foreign_glob_cxt::relids, RelOptInfo::relids, foreign_glob_cxt::root, and foreign_loc_cxt::state.

Referenced by add_foreign_final_paths(), classifyConditions(), find_em_for_rel(), find_em_for_rel_target(), foreign_grouping_ok(), foreign_join_ok(), postgresGetForeignPaths(), postgresGetForeignPlan(), and postgresPlanDirectModify().

◆ is_foreign_param()

bool is_foreign_param ( PlannerInfo root,
RelOptInfo baserel,
Expr expr 
)

Definition at line 1078 of file deparse.c.

1081 {
1082  if (expr == NULL)
1083  return false;
1084 
1085  switch (nodeTag(expr))
1086  {
1087  case T_Var:
1088  {
1089  /* It would have to be sent unless it's a foreign Var */
1090  Var *var = (Var *) expr;
1091  PgFdwRelationInfo *fpinfo = (PgFdwRelationInfo *) (baserel->fdw_private);
1092  Relids relids;
1093 
1094  if (IS_UPPER_REL(baserel))
1095  relids = fpinfo->outerrel->relids;
1096  else
1097  relids = baserel->relids;
1098 
1099  if (bms_is_member(var->varno, relids) && var->varlevelsup == 0)
1100  return false; /* foreign Var, so not a param */
1101  else
1102  return true; /* it'd have to be a param */
1103  break;
1104  }
1105  case T_Param:
1106  /* Params always have to be sent to the foreign server */
1107  return true;
1108  default:
1109  break;
1110  }
1111  return false;
1112 }
bool bms_is_member(int x, const Bitmapset *a)
Definition: bitmapset.c:428
#define nodeTag(nodeptr)
Definition: nodes.h:116
Definition: primnodes.h:205
int varno
Definition: primnodes.h:212
Index varlevelsup
Definition: primnodes.h:230

References bms_is_member(), if(), IS_UPPER_REL, nodeTag, PgFdwRelationInfo::outerrel, RelOptInfo::relids, Var::varlevelsup, and Var::varno.

Referenced by foreign_grouping_ok().

◆ is_foreign_pathkey()

bool is_foreign_pathkey ( PlannerInfo root,
RelOptInfo baserel,
PathKey pathkey 
)

Definition at line 1119 of file deparse.c.

1122 {
1123  EquivalenceClass *pathkey_ec = pathkey->pk_eclass;
1124  PgFdwRelationInfo *fpinfo = (PgFdwRelationInfo *) baserel->fdw_private;
1125 
1126  /*
1127  * is_foreign_expr would detect volatile expressions as well, but checking
1128  * ec_has_volatile here saves some cycles.
1129  */
1130  if (pathkey_ec->ec_has_volatile)
1131  return false;
1132 
1133  /* can't push down the sort if the pathkey's opfamily is not shippable */
1134  if (!is_shippable(pathkey->pk_opfamily, OperatorFamilyRelationId, fpinfo))
1135  return false;
1136 
1137  /* can push if a suitable EC member exists */
1138  return (find_em_for_rel(root, pathkey_ec, baserel) != NULL);
1139 }
EquivalenceMember * find_em_for_rel(PlannerInfo *root, EquivalenceClass *ec, RelOptInfo *rel)
bool is_shippable(Oid objectId, Oid classId, PgFdwRelationInfo *fpinfo)
Definition: shippable.c:162
EquivalenceClass * pk_eclass
Definition: pathnodes.h:1367
Oid pk_opfamily
Definition: pathnodes.h:1368

References EquivalenceClass::ec_has_volatile, find_em_for_rel(), if(), is_shippable(), PathKey::pk_eclass, and PathKey::pk_opfamily.

Referenced by get_useful_pathkeys_for_relation().

◆ is_shippable()

bool is_shippable ( Oid  objectId,
Oid  classId,
PgFdwRelationInfo fpinfo 
)

Definition at line 162 of file shippable.c.

163 {
165  ShippableCacheEntry *entry;
166 
167  /* Built-in objects are presumed shippable. */
168  if (is_builtin(objectId))
169  return true;
170 
171  /* Otherwise, give up if user hasn't specified any shippable extensions. */
172  if (fpinfo->shippable_extensions == NIL)
173  return false;
174 
175  /* Initialize cache if first time through. */
176  if (!ShippableCacheHash)
178 
179  /* Set up cache hash key */
180  key.objid = objectId;
181  key.classid = classId;
182  key.serverid = fpinfo->server->serverid;
183 
184  /* See if we already cached the result. */
185  entry = (ShippableCacheEntry *)
187  (void *) &key,
188  HASH_FIND,
189  NULL);
190 
191  if (!entry)
192  {
193  /* Not found in cache, so perform shippability lookup. */
194  bool shippable = lookup_shippable(objectId, classId, fpinfo);
195 
196  /*
197  * Don't create a new hash entry until *after* we have the shippable
198  * result in hand, as the underlying catalog lookups might trigger a
199  * cache invalidation.
200  */
201  entry = (ShippableCacheEntry *)
203  (void *) &key,
204  HASH_ENTER,
205  NULL);
206 
207  entry->shippable = shippable;
208  }
209 
210  return entry->shippable;
211 }
@ HASH_FIND
Definition: hsearch.h:113
static bool lookup_shippable(Oid objectId, Oid classId, PgFdwRelationInfo *fpinfo)
Definition: shippable.c:116
bool is_builtin(Oid objectId)
Definition: shippable.c:152
static void InitializeShippableCache(void)
Definition: shippable.c:91
static HTAB * ShippableCacheHash
Definition: shippable.c:34
Oid serverid
Definition: foreign.h:36
List * shippable_extensions
Definition: postgres_fdw.h:81
ForeignServer * server
Definition: postgres_fdw.h:86

References HASH_ENTER, HASH_FIND, hash_search(), InitializeShippableCache(), is_builtin(), sort-test::key, lookup_shippable(), NIL, PgFdwRelationInfo::server, ForeignServer::serverid, ShippableCacheEntry::shippable, PgFdwRelationInfo::shippable_extensions, and ShippableCacheHash.

Referenced by add_foreign_ordered_paths(), foreign_expr_walker(), get_useful_pathkeys_for_relation(), and is_foreign_pathkey().

◆ pgfdw_exec_query()

PGresult* pgfdw_exec_query ( PGconn conn,
const char *  query,
PgFdwConnState state 
)

Definition at line 772 of file connection.c.

773 {
774  /* First, process a pending asynchronous request, if any. */
775  if (state && state->pendingAreq)
776  process_pending_request(state->pendingAreq);
777 
778  /*
779  * Submit a query. Since we don't use non-blocking mode, this also can
780  * block. But its risk is relatively small, so we ignore that for now.
781  */
782  if (!PQsendQuery(conn, query))
783  pgfdw_report_error(ERROR, NULL, conn, false, query);
784 
785  /* Wait for the result. */
786  return pgfdw_get_result(conn, query);
787 }
PGresult * pgfdw_get_result(PGconn *conn, const char *query)
Definition: connection.c:800
void pgfdw_report_error(int elevel, PGresult *res, PGconn *conn, bool clear, const char *sql)
Definition: connection.c:865
int PQsendQuery(PGconn *conn, const char *query)
Definition: fe-exec.c:1418

References conn, ERROR, pgfdw_get_result(), pgfdw_report_error(), PQsendQuery(), and process_pending_request().

Referenced by close_cursor(), deallocate_query(), fetch_more_data(), get_remote_estimate(), postgresAcquireSampleRowsFunc(), postgresAnalyzeForeignTable(), postgresImportForeignSchema(), and postgresReScanForeignScan().

◆ pgfdw_get_result()

PGresult* pgfdw_get_result ( PGconn conn,
const char *  query 
)

Definition at line 800 of file connection.c.

801 {
802  PGresult *volatile last_res = NULL;
803 
804  /* In what follows, do not leak any PGresults on an error. */
805  PG_TRY();
806  {
807  for (;;)
808  {
809  PGresult *res;
810 
811  while (PQisBusy(conn))
812  {
813  int wc;
814 
815  /* Sleep until there's something to do */
819  PQsocket(conn),
820  -1L, PG_WAIT_EXTENSION);
822 
824 
825  /* Data available in socket? */
826  if (wc & WL_SOCKET_READABLE)
827  {
828  if (!PQconsumeInput(conn))
829  pgfdw_report_error(ERROR, NULL, conn, false, query);
830  }
831  }
832 
833  res = PQgetResult(conn);
834  if (res == NULL)
835  break; /* query is complete */
836 
837  PQclear(last_res);
838  last_res = res;
839  }
840  }
841  PG_CATCH();
842  {
843  PQclear(last_res);
844  PG_RE_THROW();
845  }
846  PG_END_TRY();
847 
848  return last_res;
849 }
int PQsocket(const PGconn *conn)
Definition: fe-connect.c:6769
int PQconsumeInput(PGconn *conn)
Definition: fe-exec.c:1953
int PQisBusy(PGconn *conn)
Definition: fe-exec.c:2000
PGresult * PQgetResult(PGconn *conn)
Definition: fe-exec.c:2031
struct Latch * MyLatch
Definition: globals.c:58
int WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock, long timeout, uint32 wait_event_info)
Definition: latch.c:524
void ResetLatch(Latch *latch)
Definition: latch.c:683
#define WL_SOCKET_READABLE
Definition: latch.h:126
#define WL_EXIT_ON_PM_DEATH
Definition: latch.h:130
#define WL_LATCH_SET
Definition: latch.h:125
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:121
#define PG_WAIT_EXTENSION
Definition: wait_event.h:23

References CHECK_FOR_INTERRUPTS, conn, ERROR, MyLatch, PG_CATCH, PG_END_TRY, PG_RE_THROW, PG_TRY, PG_WAIT_EXTENSION, pgfdw_report_error(), PQclear(), PQconsumeInput(), PQgetResult(), PQisBusy(), PQsocket(), res, ResetLatch(), WaitLatchOrSocket(), WL_EXIT_ON_PM_DEATH, WL_LATCH_SET, and WL_SOCKET_READABLE.

Referenced by create_cursor(), do_sql_command_end(), execute_dml_stmt(), execute_foreign_modify(), fetch_more_data(), pgfdw_exec_query(), and prepare_foreign_modify().

◆ pgfdw_report_error()

void pgfdw_report_error ( int  elevel,
PGresult res,
PGconn conn,
bool  clear,
const char *  sql 
)

Definition at line 865 of file connection.c.

867 {
868  /* If requested, PGresult must be released before leaving this function. */
869  PG_TRY();
870  {
871  char *diag_sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
872  char *message_primary = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
873  char *message_detail = PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL);
874  char *message_hint = PQresultErrorField(res, PG_DIAG_MESSAGE_HINT);
875  char *message_context = PQresultErrorField(res, PG_DIAG_CONTEXT);
876  int sqlstate;
877 
878  if (diag_sqlstate)
879  sqlstate = MAKE_SQLSTATE(diag_sqlstate[0],
880  diag_sqlstate[1],
881  diag_sqlstate[2],
882  diag_sqlstate[3],
883  diag_sqlstate[4]);
884  else
885  sqlstate = ERRCODE_CONNECTION_FAILURE;
886 
887  /*
888  * If we don't get a message from the PGresult, try the PGconn. This
889  * is needed because for connection-level failures, PQexec may just
890  * return NULL, not a PGresult at all.
891  */
892  if (message_primary == NULL)
893  message_primary = pchomp(PQerrorMessage(conn));
894 
895  ereport(elevel,
896  (errcode(sqlstate),
897  (message_primary != NULL && message_primary[0] != '\0') ?
898  errmsg_internal("%s", message_primary) :
899  errmsg("could not obtain message string for remote error"),
900  message_detail ? errdetail_internal("%s", message_detail) : 0,
901  message_hint ? errhint("%s", message_hint) : 0,
902  message_context ? errcontext("%s", message_context) : 0,
903  sql ? errcontext("remote SQL command: %s", sql) : 0));
904  }
905  PG_FINALLY();
906  {
907  if (clear)
908  PQclear(res);
909  }
910  PG_END_TRY();
911 }
int errhint(const char *fmt,...)
Definition: elog.c:1153
#define errcontext
Definition: elog.h:192
#define MAKE_SQLSTATE(ch1, ch2, ch3, ch4, ch5)
Definition: elog.h:52
#define PG_FINALLY(...)
Definition: elog.h:326
char * PQresultErrorField(const PGresult *res, int fieldcode)
Definition: fe-exec.c:3295
#define PG_DIAG_MESSAGE_HINT
Definition: postgres_ext.h:59
#define PG_DIAG_SQLSTATE
Definition: postgres_ext.h:56
#define PG_DIAG_MESSAGE_PRIMARY
Definition: postgres_ext.h:57
#define PG_DIAG_MESSAGE_DETAIL
Definition: postgres_ext.h:58
#define PG_DIAG_CONTEXT
Definition: postgres_ext.h:63

References conn, ereport, errcode(), errcontext, errdetail_internal(), errhint(), errmsg(), errmsg_internal(), MAKE_SQLSTATE, pchomp(), PG_DIAG_CONTEXT, PG_DIAG_MESSAGE_DETAIL, PG_DIAG_MESSAGE_HINT, PG_DIAG_MESSAGE_PRIMARY, PG_DIAG_SQLSTATE, PG_END_TRY, PG_FINALLY, PG_TRY, PQclear(), PQerrorMessage(), PQresultErrorField(), and res.

Referenced by close_cursor(), create_cursor(), deallocate_query(), do_sql_command_begin(), do_sql_command_end(), execute_dml_stmt(), execute_foreign_modify(), fetch_more_data(), fetch_more_data_begin(), get_remote_estimate(), pgfdw_exec_cleanup_query(), pgfdw_exec_query(), pgfdw_get_result(), postgresAcquireSampleRowsFunc(), postgresAnalyzeForeignTable(), postgresForeignAsyncNotify(), postgresImportForeignSchema(), postgresReScanForeignScan(), and prepare_foreign_modify().

◆ process_pending_request()

void process_pending_request ( AsyncRequest areq)

Definition at line 7139 of file postgres_fdw.c.

7140 {
7141  ForeignScanState *node = (ForeignScanState *) areq->requestee;
7142  PgFdwScanState *fsstate = (PgFdwScanState *) node->fdw_state;
7143 
7144  /* The request would have been pending for a callback */
7145  Assert(areq->callback_pending);
7146 
7147  /* The request should be currently in-process */
7148  Assert(fsstate->conn_state->pendingAreq == areq);
7149 
7150  fetch_more_data(node);
7151 
7152  /*
7153  * If we didn't get any tuples, must be end of data; complete the request
7154  * now. Otherwise, we postpone completing the request until we are called
7155  * from postgresForeignAsyncConfigureWait()/postgresForeignAsyncNotify().
7156  */
7157  if (fsstate->next_tuple >= fsstate->num_tuples)
7158  {
7159  /* Unlike AsyncNotify, we unset callback_pending ourselves */
7160  areq->callback_pending = false;
7161  /* Mark the request as complete */
7162  ExecAsyncRequestDone(areq, NULL);
7163  /* Unlike AsyncNotify, we call ExecAsyncResponse ourselves */
7164  ExecAsyncResponse(areq);
7165  }
7166 }
void ExecAsyncResponse(AsyncRequest *areq)
Definition: execAsync.c:117
void ExecAsyncRequestDone(AsyncRequest *areq, TupleTableSlot *result)
Definition: execAsync.c:137
static void fetch_more_data(ForeignScanState *node)
bool callback_pending
Definition: execnodes.h:590
struct PlanState * requestee
Definition: execnodes.h:588

References Assert(), AsyncRequest::callback_pending, ExecAsyncRequestDone(), ExecAsyncResponse(), ForeignScanState::fdw_state, fetch_more_data(), and AsyncRequest::requestee.

Referenced by create_cursor(), execute_dml_stmt(), execute_foreign_modify(), GetConnection(), pgfdw_exec_query(), and postgresForeignAsyncConfigureWait().

◆ process_pgfdw_appname()

char* process_pgfdw_appname ( const char *  appname)

Definition at line 462 of file option.c.

463 {
464  const char *p;
466 
467  Assert(MyProcPort != NULL);
468 
470 
471  for (p = appname; *p != '\0'; p++)
472  {
473  if (*p != '%')
474  {
475  /* literal char, just copy */
477  continue;
478  }
479 
480  /* must be a '%', so skip to the next char */
481  p++;
482  if (*p == '\0')
483  break; /* format error - ignore it */
484  else if (*p == '%')
485  {
486  /* string contains %% */
487  appendStringInfoChar(&buf, '%');
488  continue;
489  }
490 
491  /* process the option */
492  switch (*p)
493  {
494  case 'a':
496  break;
497  case 'c':
498  appendStringInfo(&buf, "%lx.%x", (long) (MyStartTime), MyProcPid);
499  break;
500  case 'C':
502  break;
503  case 'd':
505  break;
506  case 'p':
507  appendStringInfo(&buf, "%d", MyProcPid);
508  break;
509  case 'u':
511  break;
512  default:
513  /* format error - ignore it */
514  break;
515  }
516  }
517 
518  return buf.data;
519 }
int MyProcPid
Definition: globals.c:44
struct Port * MyProcPort
Definition: globals.c:47
pg_time_t MyStartTime
Definition: globals.c:45
char * cluster_name
Definition: guc_tables.c:502
char * application_name
Definition: guc_tables.c:510
char * user_name
Definition: libpq-be.h:166
char * database_name
Definition: libpq-be.h:165

References appendStringInfo(), appendStringInfoChar(), appendStringInfoString(), application_name, Assert(), buf, cluster_name, Port::database_name, initStringInfo(), MyProcPid, MyProcPort, MyStartTime, and Port::user_name.

Referenced by connect_pg_server().

◆ rebuildInsertSql()

void rebuildInsertSql ( StringInfo  buf,
Relation  rel,
char *  orig_query,
List target_attrs,
int  values_end_len,
int  num_params,
int  num_rows 
)

Definition at line 2015 of file deparse.c.

2019 {
2020  TupleDesc tupdesc = RelationGetDescr(rel);
2021  int i;
2022  int pindex;
2023  bool first;
2024  ListCell *lc;
2025 
2026  /* Make sure the values_end_len is sensible */
2027  Assert((values_end_len > 0) && (values_end_len <= strlen(orig_query)));
2028 
2029  /* Copy up to the end of the first record from the original query */
2030  appendBinaryStringInfo(buf, orig_query, values_end_len);
2031 
2032  /*
2033  * Add records to VALUES clause (we already have parameters for the first
2034  * row, so start at the right offset).
2035  */
2036  pindex = num_params + 1;
2037  for (i = 0; i < num_rows; i++)
2038  {
2039  appendStringInfoString(buf, ", (");
2040 
2041  first = true;
2042  foreach(lc, target_attrs)
2043  {
2044  int attnum = lfirst_int(lc);
2045  Form_pg_attribute attr = TupleDescAttr(tupdesc, attnum - 1);
2046 
2047  if (!first)
2048  appendStringInfoString(buf, ", ");
2049  first = false;
2050 
2051  if (attr->attgenerated)
2052  appendStringInfoString(buf, "DEFAULT");
2053  else
2054  {
2055  appendStringInfo(buf, "$%d", pindex);
2056  pindex++;
2057  }
2058  }
2059 
2060  appendStringInfoChar(buf, ')');
2061  }
2062 
2063  /* Copy stuff after VALUES clause from the original query */
2064  appendStringInfoString(buf, orig_query + values_end_len);
2065 }
void appendBinaryStringInfo(StringInfo str, const char *data, int datalen)
Definition: stringinfo.c:227

References appendBinaryStringInfo(), appendStringInfo(), appendStringInfoChar(), appendStringInfoString(), Assert(), attnum, buf, i, lfirst_int, RelationGetDescr, and TupleDescAttr.

Referenced by execute_foreign_modify().

◆ ReleaseConnection()

void ReleaseConnection ( PGconn conn)

Definition at line 724 of file connection.c.

725 {
726  /*
727  * Currently, we don't actually track connection references because all
728  * cleanup is managed on a transaction or subtransaction basis instead. So
729  * there's nothing to do here.
730  */
731 }

Referenced by estimate_path_cost_size(), finish_foreign_modify(), postgresAcquireSampleRowsFunc(), postgresAnalyzeForeignTable(), postgresEndDirectModify(), postgresEndForeignScan(), and postgresImportForeignSchema().

◆ reset_transmission_modes()

void reset_transmission_modes ( int  nestlevel)

Definition at line 3923 of file postgres_fdw.c.

3924 {
3925  AtEOXact_GUC(true, nestlevel);
3926 }
void AtEOXact_GUC(bool isCommit, int nestLevel)
Definition: guc.c:2197

References AtEOXact_GUC().

Referenced by appendConditions(), appendLimitClause(), appendOrderByClause(), convert_prep_stmt_params(), deparseDirectUpdateSql(), and process_query_params().

◆ set_transmission_modes()

int set_transmission_modes ( void  )

Definition at line 3887 of file postgres_fdw.c.

3888 {
3889  int nestlevel = NewGUCNestLevel();
3890 
3891  /*
3892  * The values set here should match what pg_dump does. See also
3893  * configure_remote_session in connection.c.
3894  */
3895  if (DateStyle != USE_ISO_DATES)
3896  (void) set_config_option("datestyle", "ISO",
3898  GUC_ACTION_SAVE, true, 0, false);
3900  (void) set_config_option("intervalstyle", "postgres",
3902  GUC_ACTION_SAVE, true, 0, false);
3903  if (extra_float_digits < 3)
3904  (void) set_config_option("extra_float_digits", "3",
3906  GUC_ACTION_SAVE, true, 0, false);
3907 
3908  /*
3909  * In addition force restrictive search_path, in case there are any
3910  * regproc or similar constants to be printed.
3911  */
3912  (void) set_config_option("search_path", "pg_catalog",
3914  GUC_ACTION_SAVE, true, 0, false);
3915 
3916  return nestlevel;
3917 }
int extra_float_digits
Definition: float.c:43
int DateStyle
Definition: globals.c:119
int IntervalStyle
Definition: globals.c:121
int NewGUCNestLevel(void)
Definition: guc.c:2183
int set_config_option(const char *name, const char *value, GucContext context, GucSource source, GucAction action, bool changeVal, int elevel, bool is_reload)
Definition: guc.c:3266
@ GUC_ACTION_SAVE
Definition: guc.h:199
@ PGC_S_SESSION
Definition: guc.h:122
@ PGC_USERSET
Definition: guc.h:75
#define USE_ISO_DATES
Definition: miscadmin.h:230
#define INTSTYLE_POSTGRES
Definition: miscadmin.h:250

References DateStyle, extra_float_digits, GUC_ACTION_SAVE, IntervalStyle, INTSTYLE_POSTGRES, NewGUCNestLevel(), PGC_S_SESSION, PGC_USERSET, set_config_option(), and USE_ISO_DATES.

Referenced by appendConditions(), appendLimitClause(), appendOrderByClause(), convert_prep_stmt_params(), deparseDirectUpdateSql(), and process_query_params().

Variable Documentation

◆ pgfdw_application_name

char* pgfdw_application_name
extern

Definition at line 52 of file option.c.

Referenced by _PG_init(), and connect_pg_server().