PostgreSQL Source Code  git master
parse_node.c File Reference
#include "postgres.h"
#include "access/htup_details.h"
#include "access/table.h"
#include "catalog/pg_type.h"
#include "mb/pg_wchar.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
#include "parser/parse_coerce.h"
#include "parser/parse_expr.h"
#include "parser/parse_relation.h"
#include "parser/parsetree.h"
#include "utils/builtins.h"
#include "utils/int8.h"
#include "utils/lsyscache.h"
#include "utils/syscache.h"
#include "utils/varbit.h"
Include dependency graph for parse_node.c:

Go to the source code of this file.

Functions

static void pcb_error_callback (void *arg)
 
ParseStatemake_parsestate (ParseState *parentParseState)
 
void free_parsestate (ParseState *pstate)
 
int parser_errposition (ParseState *pstate, int location)
 
void setup_parser_errposition_callback (ParseCallbackState *pcbstate, ParseState *pstate, int location)
 
void cancel_parser_errposition_callback (ParseCallbackState *pcbstate)
 
Oid transformContainerType (Oid *containerType, int32 *containerTypmod)
 
SubscriptingReftransformContainerSubscripts (ParseState *pstate, Node *containerBase, Oid containerType, Oid elementType, int32 containerTypMod, List *indirection, Node *assignFrom)
 
Constmake_const (ParseState *pstate, Value *value, int location)
 

Function Documentation

◆ cancel_parser_errposition_callback()

void cancel_parser_errposition_callback ( ParseCallbackState pcbstate)

◆ free_parsestate()

void free_parsestate ( ParseState pstate)

Definition at line 76 of file parse_node.c.

References ereport, errcode(), errmsg(), ERROR, MaxTupleAttributeNumber, NoLock, ParseState::p_next_resno, ParseState::p_target_relation, pfree(), and table_close().

Referenced by AlterPolicy(), CreatePolicy(), CreateTrigger(), inline_function(), parse_analyze(), parse_analyze_varparams(), parse_sub_analyze(), pg_analyze_and_rewrite_params(), RemoveRoleFromObjectPolicy(), standard_ProcessUtility(), transformIndexStmt(), transformInsertStmt(), and transformRuleStmt().

77 {
78  /*
79  * Check that we did not produce too many resnos; at the very least we
80  * cannot allow more than 2^16, since that would exceed the range of a
81  * AttrNumber. It seems safest to use MaxTupleAttributeNumber.
82  */
83  if (pstate->p_next_resno - 1 > MaxTupleAttributeNumber)
84  ereport(ERROR,
85  (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
86  errmsg("target lists can have at most %d entries",
88 
89  if (pstate->p_target_relation != NULL)
91 
92  pfree(pstate);
93 }
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:133
#define MaxTupleAttributeNumber
Definition: htup_details.h:33
int errcode(int sqlerrcode)
Definition: elog.c:610
void pfree(void *pointer)
Definition: mcxt.c:1056
#define ERROR
Definition: elog.h:43
#define NoLock
Definition: lockdefs.h:34
int p_next_resno
Definition: parse_node.h:195
#define ereport(elevel,...)
Definition: elog.h:144
int errmsg(const char *fmt,...)
Definition: elog.c:824
Relation p_target_relation
Definition: parse_node.h:190

◆ make_const()

Const* make_const ( ParseState pstate,
Value value,
int  location 
)

Definition at line 455 of file parse_node.c.

References bit_in(), cancel_parser_errposition_callback(), CStringGetDatum, DirectFunctionCall3, elog, ERROR, FLOAT8PASSBYVAL, Int32GetDatum, Int64GetDatum(), intVal, InvalidOid, Const::location, makeConst(), nodeTag, numeric_in(), ObjectIdGetDatum, scanint8(), setup_parser_errposition_callback(), strVal, T_BitString, T_Float, T_Integer, T_Null, T_String, and val.

Referenced by transformExprRecurse().

456 {
457  Const *con;
458  Datum val;
459  int64 val64;
460  Oid typeid;
461  int typelen;
462  bool typebyval;
463  ParseCallbackState pcbstate;
464 
465  switch (nodeTag(value))
466  {
467  case T_Integer:
468  val = Int32GetDatum(intVal(value));
469 
470  typeid = INT4OID;
471  typelen = sizeof(int32);
472  typebyval = true;
473  break;
474 
475  case T_Float:
476  /* could be an oversize integer as well as a float ... */
477  if (scanint8(strVal(value), true, &val64))
478  {
479  /*
480  * It might actually fit in int32. Probably only INT_MIN can
481  * occur, but we'll code the test generally just to be sure.
482  */
483  int32 val32 = (int32) val64;
484 
485  if (val64 == (int64) val32)
486  {
487  val = Int32GetDatum(val32);
488 
489  typeid = INT4OID;
490  typelen = sizeof(int32);
491  typebyval = true;
492  }
493  else
494  {
495  val = Int64GetDatum(val64);
496 
497  typeid = INT8OID;
498  typelen = sizeof(int64);
499  typebyval = FLOAT8PASSBYVAL; /* int8 and float8 alike */
500  }
501  }
502  else
503  {
504  /* arrange to report location if numeric_in() fails */
505  setup_parser_errposition_callback(&pcbstate, pstate, location);
507  CStringGetDatum(strVal(value)),
509  Int32GetDatum(-1));
511 
512  typeid = NUMERICOID;
513  typelen = -1; /* variable len */
514  typebyval = false;
515  }
516  break;
517 
518  case T_String:
519 
520  /*
521  * We assume here that UNKNOWN's internal representation is the
522  * same as CSTRING
523  */
524  val = CStringGetDatum(strVal(value));
525 
526  typeid = UNKNOWNOID; /* will be coerced later */
527  typelen = -2; /* cstring-style varwidth type */
528  typebyval = false;
529  break;
530 
531  case T_BitString:
532  /* arrange to report location if bit_in() fails */
533  setup_parser_errposition_callback(&pcbstate, pstate, location);
535  CStringGetDatum(strVal(value)),
537  Int32GetDatum(-1));
539  typeid = BITOID;
540  typelen = -1;
541  typebyval = false;
542  break;
543 
544  case T_Null:
545  /* return a null const */
546  con = makeConst(UNKNOWNOID,
547  -1,
548  InvalidOid,
549  -2,
550  (Datum) 0,
551  true,
552  false);
553  con->location = location;
554  return con;
555 
556  default:
557  elog(ERROR, "unrecognized node type: %d", (int) nodeTag(value));
558  return NULL; /* keep compiler quiet */
559  }
560 
561  con = makeConst(typeid,
562  -1, /* typmod -1 is OK for all cases */
563  InvalidOid, /* all cases are uncollatable types */
564  typelen,
565  val,
566  false,
567  typebyval);
568  con->location = location;
569 
570  return con;
571 }
#define strVal(v)
Definition: value.h:54
unsigned int Oid
Definition: postgres_ext.h:31
Const * makeConst(Oid consttype, int32 consttypmod, Oid constcollid, int constlen, Datum constvalue, bool constisnull, bool constbyval)
Definition: makefuncs.c:297
signed int int32
Definition: c.h:355
void cancel_parser_errposition_callback(ParseCallbackState *pcbstate)
Definition: parse_node.c:160
#define ObjectIdGetDatum(X)
Definition: postgres.h:507
#define ERROR
Definition: elog.h:43
Datum bit_in(PG_FUNCTION_ARGS)
Definition: varbit.c:146
#define CStringGetDatum(X)
Definition: postgres.h:578
Datum numeric_in(PG_FUNCTION_ARGS)
Definition: numeric.c:567
Datum Int64GetDatum(int64 X)
Definition: fmgr.c:1701
void setup_parser_errposition_callback(ParseCallbackState *pcbstate, ParseState *pstate, int location)
Definition: parse_node.c:144
#define DirectFunctionCall3(func, arg1, arg2, arg3)
Definition: fmgr.h:628
int location
Definition: primnodes.h:221
uintptr_t Datum
Definition: postgres.h:367
#define InvalidOid
Definition: postgres_ext.h:36
#define FLOAT8PASSBYVAL
Definition: c.h:496
#define nodeTag(nodeptr)
Definition: nodes.h:534
Definition: nodes.h:295
Definition: nodes.h:292
#define Int32GetDatum(X)
Definition: postgres.h:479
#define intVal(v)
Definition: value.h:52
#define elog(elevel,...)
Definition: elog.h:214
long val
Definition: informix.c:664
bool scanint8(const char *str, bool errorOK, int64 *result)
Definition: int8.c:55

◆ make_parsestate()

ParseState* make_parsestate ( ParseState parentParseState)

Definition at line 43 of file parse_node.c.

References ParseState::p_coerce_param_hook, ParseState::p_next_resno, ParseState::p_paramref_hook, ParseState::p_post_columnref_hook, ParseState::p_pre_columnref_hook, ParseState::p_queryEnv, ParseState::p_ref_hook_state, ParseState::p_resolve_unknowns, ParseState::p_sourcetext, palloc0(), and ParseState::parentParseState.

Referenced by AddRelationNewConstraints(), AlterDomainDefault(), AlterPolicy(), ATPrepAlterColumnType(), check_new_partition_bound(), convert_ANY_sublink_to_join(), copy_table(), CreatePolicy(), CreateTrigger(), DefineDomain(), DefineRelation(), domainAddConstraint(), ExplainExecuteQuery(), inline_function(), parse_analyze(), parse_analyze_varparams(), parse_sub_analyze(), pg_analyze_and_rewrite_params(), RemoveRoleFromObjectPolicy(), rewriteTargetView(), standard_ProcessUtility(), test_rls_hooks_permissive(), test_rls_hooks_restrictive(), transformAlterTableStmt(), transformCreateStmt(), transformIndexStmt(), transformInsertStmt(), transformPartitionSpec(), transformRuleStmt(), and UpdateRangeTableOfViewParse().

44 {
45  ParseState *pstate;
46 
47  pstate = palloc0(sizeof(ParseState));
48 
49  pstate->parentParseState = parentParseState;
50 
51  /* Fill in fields that don't start at null/false/zero */
52  pstate->p_next_resno = 1;
53  pstate->p_resolve_unknowns = true;
54 
55  if (parentParseState)
56  {
57  pstate->p_sourcetext = parentParseState->p_sourcetext;
58  /* all hooks are copied from parent */
59  pstate->p_pre_columnref_hook = parentParseState->p_pre_columnref_hook;
60  pstate->p_post_columnref_hook = parentParseState->p_post_columnref_hook;
61  pstate->p_paramref_hook = parentParseState->p_paramref_hook;
62  pstate->p_coerce_param_hook = parentParseState->p_coerce_param_hook;
63  pstate->p_ref_hook_state = parentParseState->p_ref_hook_state;
64  /* query environment stays in context for the whole parse analysis */
65  pstate->p_queryEnv = parentParseState->p_queryEnv;
66  }
67 
68  return pstate;
69 }
QueryEnvironment * p_queryEnv
Definition: parse_node.h:203
ParseState * parentParseState
Definition: parse_node.h:178
CoerceParamHook p_coerce_param_hook
Definition: parse_node.h:221
PostParseColumnRefHook p_post_columnref_hook
Definition: parse_node.h:219
bool p_resolve_unknowns
Definition: parse_node.h:200
ParseParamRefHook p_paramref_hook
Definition: parse_node.h:220
int p_next_resno
Definition: parse_node.h:195
const char * p_sourcetext
Definition: parse_node.h:179
void * palloc0(Size size)
Definition: mcxt.c:980
void * p_ref_hook_state
Definition: parse_node.h:222
PreParseColumnRefHook p_pre_columnref_hook
Definition: parse_node.h:218

◆ parser_errposition()

int parser_errposition ( ParseState pstate,
int  location 
)

Definition at line 110 of file parse_node.c.

References errposition(), ParseState::p_sourcetext, and pg_mbstrlen_with_len().

Referenced by addRangeTableEntryForCTE(), addRangeTableEntryForFunction(), AlterDatabase(), analyzeCTE(), analyzeCTETargetList(), assign_collations_walker(), assign_hypothetical_collations(), check_agg_arguments(), check_agg_arguments_walker(), check_agglevels_and_constraints(), check_lateral_ref_ok(), check_nested_generated_walker(), check_new_partition_bound(), check_parameter_resolution_walker(), check_srf_call_placement(), check_ungrouped_columns_walker(), checkExprIsVarFree(), checkInsertTargets(), checkTargetlistEntrySQL92(), checkWellFormedRecursion(), checkWellFormedRecursionWalker(), coerce_to_boolean(), coerce_to_common_type(), coerce_to_specific_type_typmod(), colNameToVar(), compatible_oper(), compute_common_attribute(), compute_function_attributes(), ComputePartitionAttrs(), createdb(), CreateExtension(), CreateRole(), CreateTrigger(), DefineCollation(), DefineType(), DropDatabase(), emit_precedence_warnings(), errorMissingColumn(), errorMissingRTE(), EvaluateParams(), ExecAlterDefaultPrivilegesStmt(), ExecAlterExtensionStmt(), ExecVacuum(), ExpandAllTables(), ExpandColumnRefStar(), ExplainQuery(), finalize_grouping_exprs_walker(), findTargetlistEntrySQL92(), fixed_paramref_hook(), GetColumnDefCollation(), init_params(), LookupOperName(), LookupTypeNameExtended(), LookupTypeNameOid(), make_distinct_op(), make_op(), make_row_comparison_op(), make_row_distinct_op(), make_scalar_array_op(), merge_collation_state(), op_error(), parseCheckAggregates(), ParseFuncOrColumn(), parser_coercion_errposition(), parseTypeString(), pcb_error_callback(), plpgsql_post_column_ref(), ProcessCopyOptions(), resolve_column_ref(), resolve_unique_index_expr(), scanNameSpaceForRefname(), scanNameSpaceForRelid(), scanNSItemForColumn(), scanRTEForColumn(), select_common_collation(), select_common_type(), TopologicalSort(), transformAExprNullIf(), transformAggregateCall(), transformArrayExpr(), transformAssignedExpr(), transformAssignmentIndirection(), transformAssignmentSubscripts(), transformCaseExpr(), transformCoalesceExpr(), transformCollateClause(), transformColumnDefinition(), transformColumnRef(), transformColumnType(), transformConstraintAttrs(), transformContainerSubscripts(), transformDistinctClause(), transformDistinctOnClause(), transformExprRecurse(), transformFrameOffset(), transformFromClauseItem(), transformGroupingFunc(), transformGroupingSet(), transformIndexConstraint(), transformIndirection(), transformInsertRow(), transformInsertStmt(), transformLockingClause(), transformMultiAssignRef(), transformOnConflictArbiter(), transformParamRef(), transformPartitionBound(), transformPartitionBoundValue(), transformRangeFunction(), transformRangeTableFunc(), transformRangeTableSample(), transformReturningList(), transformSelectStmt(), transformSetOperationStmt(), transformSetOperationTree(), transformSubLink(), transformTableConstraint(), transformUpdateTargetList(), transformValuesClause(), transformWindowDefinitions(), transformWindowFuncCall(), transformWithClause(), transformXmlExpr(), transformXmlSerialize(), typenameType(), typenameTypeMod(), unknown_attribute(), validateInfiniteBounds(), variable_coerce_param_hook(), and variable_paramref_hook().

111 {
112  int pos;
113 
114  /* No-op if location was not provided */
115  if (location < 0)
116  return 0;
117  /* Can't do anything if source text is not available */
118  if (pstate == NULL || pstate->p_sourcetext == NULL)
119  return 0;
120  /* Convert offset to character number */
121  pos = pg_mbstrlen_with_len(pstate->p_sourcetext, location) + 1;
122  /* And pass it to the ereport mechanism */
123  return errposition(pos);
124 }
int pg_mbstrlen_with_len(const char *mbstr, int limit)
Definition: mbutils.c:941
const char * p_sourcetext
Definition: parse_node.h:179
int errposition(int cursorpos)
Definition: elog.c:1199

◆ pcb_error_callback()

static void pcb_error_callback ( void *  arg)
static

Definition at line 174 of file parse_node.c.

References geterrcode(), ParseCallbackState::location, parser_errposition(), and ParseCallbackState::pstate.

Referenced by setup_parser_errposition_callback().

175 {
176  ParseCallbackState *pcbstate = (ParseCallbackState *) arg;
177 
178  if (geterrcode() != ERRCODE_QUERY_CANCELED)
179  (void) parser_errposition(pcbstate->pstate, pcbstate->location);
180 }
int geterrcode(void)
Definition: elog.c:1314
ParseState * pstate
Definition: parse_node.h:302
int parser_errposition(ParseState *pstate, int location)
Definition: parse_node.c:110
void * arg

◆ setup_parser_errposition_callback()

void setup_parser_errposition_callback ( ParseCallbackState pcbstate,
ParseState pstate,
int  location 
)

Definition at line 144 of file parse_node.c.

References ErrorContextCallback::arg, ErrorContextCallback::callback, ParseCallbackState::errcallback, error_context_stack, ParseCallbackState::location, pcb_error_callback(), ErrorContextCallback::previous, and ParseCallbackState::pstate.

Referenced by addTargetToGroupList(), addTargetToSortList(), coerce_type(), LookupCollation(), LookupTypeNameExtended(), make_const(), make_oper_cache_key(), ParseFuncOrColumn(), parserOpenTable(), transformCreateStmt(), transformSetOperationTree(), transformTableLikeClause(), and typenameTypeMod().

146 {
147  /* Setup error traceback support for ereport() */
148  pcbstate->pstate = pstate;
149  pcbstate->location = location;
151  pcbstate->errcallback.arg = (void *) pcbstate;
153  error_context_stack = &pcbstate->errcallback;
154 }
ErrorContextCallback errcallback
Definition: parse_node.h:304
void(* callback)(void *arg)
Definition: elog.h:229
struct ErrorContextCallback * previous
Definition: elog.h:228
ErrorContextCallback * error_context_stack
Definition: elog.c:92
ParseState * pstate
Definition: parse_node.h:302
static void pcb_error_callback(void *arg)
Definition: parse_node.c:174

◆ transformContainerSubscripts()

SubscriptingRef* transformContainerSubscripts ( ParseState pstate,
Node containerBase,
Oid  containerType,
Oid  elementType,
int32  containerTypMod,
List indirection,
Node assignFrom 
)

Definition at line 276 of file parse_node.c.

References Assert, COERCE_IMPLICIT_CAST, coerce_to_target_type(), COERCION_ASSIGNMENT, ereport, errcode(), errhint(), errmsg(), ERROR, exprLocation(), exprType(), format_type_be(), idx(), Int32GetDatum, InvalidOid, A_Indices::is_slice, lappend(), lfirst, lfirst_node, A_Indices::lidx, makeConst(), makeNode, NIL, OidIsValid, ParseState::p_expr_kind, parser_errposition(), SubscriptingRef::refassgnexpr, SubscriptingRef::refcontainertype, SubscriptingRef::refelemtype, SubscriptingRef::refexpr, SubscriptingRef::reflowerindexpr, SubscriptingRef::reftypmod, SubscriptingRef::refupperindexpr, transformContainerType(), transformExpr(), and A_Indices::uidx.

Referenced by transformAssignmentSubscripts(), and transformIndirection().

283 {
284  bool isSlice = false;
285  List *upperIndexpr = NIL;
286  List *lowerIndexpr = NIL;
287  ListCell *idx;
288  SubscriptingRef *sbsref;
289 
290  /*
291  * Caller may or may not have bothered to determine elementType. Note
292  * that if the caller did do so, containerType/containerTypMod must be as
293  * modified by transformContainerType, ie, smash domain to base type.
294  */
295  if (!OidIsValid(elementType))
296  elementType = transformContainerType(&containerType, &containerTypMod);
297 
298  /*
299  * A list containing only simple subscripts refers to a single container
300  * element. If any of the items are slice specifiers (lower:upper), then
301  * the subscript expression means a container slice operation. In this
302  * case, we convert any non-slice items to slices by treating the single
303  * subscript as the upper bound and supplying an assumed lower bound of 1.
304  * We have to prescan the list to see if there are any slice items.
305  */
306  foreach(idx, indirection)
307  {
308  A_Indices *ai = (A_Indices *) lfirst(idx);
309 
310  if (ai->is_slice)
311  {
312  isSlice = true;
313  break;
314  }
315  }
316 
317  /*
318  * Transform the subscript expressions.
319  */
320  foreach(idx, indirection)
321  {
322  A_Indices *ai = lfirst_node(A_Indices, idx);
323  Node *subexpr;
324 
325  if (isSlice)
326  {
327  if (ai->lidx)
328  {
329  subexpr = transformExpr(pstate, ai->lidx, pstate->p_expr_kind);
330  /* If it's not int4 already, try to coerce */
331  subexpr = coerce_to_target_type(pstate,
332  subexpr, exprType(subexpr),
333  INT4OID, -1,
336  -1);
337  if (subexpr == NULL)
338  ereport(ERROR,
339  (errcode(ERRCODE_DATATYPE_MISMATCH),
340  errmsg("array subscript must have type integer"),
341  parser_errposition(pstate, exprLocation(ai->lidx))));
342  }
343  else if (!ai->is_slice)
344  {
345  /* Make a constant 1 */
346  subexpr = (Node *) makeConst(INT4OID,
347  -1,
348  InvalidOid,
349  sizeof(int32),
350  Int32GetDatum(1),
351  false,
352  true); /* pass by value */
353  }
354  else
355  {
356  /* Slice with omitted lower bound, put NULL into the list */
357  subexpr = NULL;
358  }
359  lowerIndexpr = lappend(lowerIndexpr, subexpr);
360  }
361  else
362  Assert(ai->lidx == NULL && !ai->is_slice);
363 
364  if (ai->uidx)
365  {
366  subexpr = transformExpr(pstate, ai->uidx, pstate->p_expr_kind);
367  /* If it's not int4 already, try to coerce */
368  subexpr = coerce_to_target_type(pstate,
369  subexpr, exprType(subexpr),
370  INT4OID, -1,
373  -1);
374  if (subexpr == NULL)
375  ereport(ERROR,
376  (errcode(ERRCODE_DATATYPE_MISMATCH),
377  errmsg("array subscript must have type integer"),
378  parser_errposition(pstate, exprLocation(ai->uidx))));
379  }
380  else
381  {
382  /* Slice with omitted upper bound, put NULL into the list */
383  Assert(isSlice && ai->is_slice);
384  subexpr = NULL;
385  }
386  upperIndexpr = lappend(upperIndexpr, subexpr);
387  }
388 
389  /*
390  * If doing an array store, coerce the source value to the right type.
391  * (This should agree with the coercion done by transformAssignedExpr.)
392  */
393  if (assignFrom != NULL)
394  {
395  Oid typesource = exprType(assignFrom);
396  Oid typeneeded = isSlice ? containerType : elementType;
397  Node *newFrom;
398 
399  newFrom = coerce_to_target_type(pstate,
400  assignFrom, typesource,
401  typeneeded, containerTypMod,
404  -1);
405  if (newFrom == NULL)
406  ereport(ERROR,
407  (errcode(ERRCODE_DATATYPE_MISMATCH),
408  errmsg("array assignment requires type %s"
409  " but expression is of type %s",
410  format_type_be(typeneeded),
411  format_type_be(typesource)),
412  errhint("You will need to rewrite or cast the expression."),
413  parser_errposition(pstate, exprLocation(assignFrom))));
414  assignFrom = newFrom;
415  }
416 
417  /*
418  * Ready to build the SubscriptingRef node.
419  */
421  if (assignFrom != NULL)
422  sbsref->refassgnexpr = (Expr *) assignFrom;
423 
424  sbsref->refcontainertype = containerType;
425  sbsref->refelemtype = elementType;
426  sbsref->reftypmod = containerTypMod;
427  /* refcollid will be set by parse_collate.c */
428  sbsref->refupperindexpr = upperIndexpr;
429  sbsref->reflowerindexpr = lowerIndexpr;
430  sbsref->refexpr = (Expr *) containerBase;
431  sbsref->refassgnexpr = (Expr *) assignFrom;
432 
433  return sbsref;
434 }
#define NIL
Definition: pg_list.h:65
int errhint(const char *fmt,...)
Definition: elog.c:1071
int exprLocation(const Node *expr)
Definition: nodeFuncs.c:1191
Node * transformExpr(ParseState *pstate, Node *expr, ParseExprKind exprKind)
Definition: parse_expr.c:145
Definition: nodes.h:529
int errcode(int sqlerrcode)
Definition: elog.c:610
char * format_type_be(Oid type_oid)
Definition: format_type.c:327
Datum idx(PG_FUNCTION_ARGS)
Definition: _int_op.c:259
unsigned int Oid
Definition: postgres_ext.h:31
Const * makeConst(Oid consttype, int32 consttypmod, Oid constcollid, int constlen, Datum constvalue, bool constisnull, bool constbyval)
Definition: makefuncs.c:297
List * refupperindexpr
Definition: primnodes.h:422
#define OidIsValid(objectId)
Definition: c.h:644
signed int int32
Definition: c.h:355
bool is_slice
Definition: parsenodes.h:383
#define ERROR
Definition: elog.h:43
Node * coerce_to_target_type(ParseState *pstate, Node *expr, Oid exprtype, Oid targettype, int32 targettypmod, CoercionContext ccontext, CoercionForm cformat, int location)
Definition: parse_coerce.c:77
#define lfirst_node(type, lc)
Definition: pg_list.h:193
List * lappend(List *list, void *datum)
Definition: list.c:321
ParseExprKind p_expr_kind
Definition: parse_node.h:194
#define InvalidOid
Definition: postgres_ext.h:36
#define ereport(elevel,...)
Definition: elog.h:144
#define makeNode(_type_)
Definition: nodes.h:577
#define Assert(condition)
Definition: c.h:738
#define lfirst(lc)
Definition: pg_list.h:190
Oid exprType(const Node *expr)
Definition: nodeFuncs.c:41
int parser_errposition(ParseState *pstate, int location)
Definition: parse_node.c:110
Node * lidx
Definition: parsenodes.h:384
Expr * refassgnexpr
Definition: primnodes.h:430
#define Int32GetDatum(X)
Definition: postgres.h:479
int errmsg(const char *fmt,...)
Definition: elog.c:824
List * reflowerindexpr
Definition: primnodes.h:424
Node * uidx
Definition: parsenodes.h:385
Oid refcontainertype
Definition: primnodes.h:418
Expr * refexpr
Definition: primnodes.h:427
Definition: pg_list.h:50
Oid transformContainerType(Oid *containerType, int32 *containerTypmod)
Definition: parse_node.c:195

◆ transformContainerType()

Oid transformContainerType ( Oid containerType,
int32 containerTypmod 
)

Definition at line 195 of file parse_node.c.

References elog, ereport, errcode(), errmsg(), ERROR, format_type_be(), getBaseTypeAndTypmod(), GETSTRUCT, HeapTupleIsValid, InvalidOid, ObjectIdGetDatum, ReleaseSysCache(), SearchSysCache1(), and TYPEOID.

Referenced by transformAssignmentSubscripts(), and transformContainerSubscripts().

196 {
197  Oid origContainerType = *containerType;
198  Oid elementType;
199  HeapTuple type_tuple_container;
200  Form_pg_type type_struct_container;
201 
202  /*
203  * If the input is a domain, smash to base type, and extract the actual
204  * typmod to be applied to the base type. Subscripting a domain is an
205  * operation that necessarily works on the base container type, not the
206  * domain itself. (Note that we provide no method whereby the creator of a
207  * domain over a container type could hide its ability to be subscripted.)
208  */
209  *containerType = getBaseTypeAndTypmod(*containerType, containerTypmod);
210 
211  /*
212  * Here is an array specific code. We treat int2vector and oidvector as
213  * though they were domains over int2[] and oid[]. This is needed because
214  * array slicing could create an array that doesn't satisfy the
215  * dimensionality constraints of the xxxvector type; so we want the result
216  * of a slice operation to be considered to be of the more general type.
217  */
218  if (*containerType == INT2VECTOROID)
219  *containerType = INT2ARRAYOID;
220  else if (*containerType == OIDVECTOROID)
221  *containerType = OIDARRAYOID;
222 
223  /* Get the type tuple for the container */
224  type_tuple_container = SearchSysCache1(TYPEOID, ObjectIdGetDatum(*containerType));
225  if (!HeapTupleIsValid(type_tuple_container))
226  elog(ERROR, "cache lookup failed for type %u", *containerType);
227  type_struct_container = (Form_pg_type) GETSTRUCT(type_tuple_container);
228 
229  /* needn't check typisdefined since this will fail anyway */
230 
231  elementType = type_struct_container->typelem;
232  if (elementType == InvalidOid)
233  ereport(ERROR,
234  (errcode(ERRCODE_DATATYPE_MISMATCH),
235  errmsg("cannot subscript type %s because it is not an array",
236  format_type_be(origContainerType))));
237 
238  ReleaseSysCache(type_tuple_container);
239 
240  return elementType;
241 }
Oid getBaseTypeAndTypmod(Oid typid, int32 *typmod)
Definition: lsyscache.c:2426
#define GETSTRUCT(TUP)
Definition: htup_details.h:655
int errcode(int sqlerrcode)
Definition: elog.c:610
char * format_type_be(Oid type_oid)
Definition: format_type.c:327
unsigned int Oid
Definition: postgres_ext.h:31
#define ObjectIdGetDatum(X)
Definition: postgres.h:507
#define ERROR
Definition: elog.h:43
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1116
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1164
#define InvalidOid
Definition: postgres_ext.h:36
#define ereport(elevel,...)
Definition: elog.h:144
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
FormData_pg_type * Form_pg_type
Definition: pg_type.h:255
int errmsg(const char *fmt,...)
Definition: elog.c:824
#define elog(elevel,...)
Definition: elog.h:214