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 "nodes/subscripting.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)
 
void transformContainerType (Oid *containerType, int32 *containerTypmod)
 
SubscriptingReftransformContainerSubscripts (ParseState *pstate, Node *containerBase, Oid containerType, int32 containerTypMod, List *indirection, bool isAssignment)
 
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 77 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().

78 {
79  /*
80  * Check that we did not produce too many resnos; at the very least we
81  * cannot allow more than 2^16, since that would exceed the range of a
82  * AttrNumber. It seems safest to use MaxTupleAttributeNumber.
83  */
84  if (pstate->p_next_resno - 1 > MaxTupleAttributeNumber)
85  ereport(ERROR,
86  (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
87  errmsg("target lists can have at most %d entries",
89 
90  if (pstate->p_target_relation != NULL)
92 
93  pfree(pstate);
94 }
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:167
#define MaxTupleAttributeNumber
Definition: htup_details.h:33
int errcode(int sqlerrcode)
Definition: elog.c:704
void pfree(void *pointer)
Definition: mcxt.c:1057
#define ERROR
Definition: elog.h:45
#define NoLock
Definition: lockdefs.h:34
int p_next_resno
Definition: parse_node.h:195
#define ereport(elevel,...)
Definition: elog.h:155
int errmsg(const char *fmt,...)
Definition: elog.c:915
Relation p_target_relation
Definition: parse_node.h:190

◆ make_const()

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

Definition at line 352 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().

353 {
354  Const *con;
355  Datum val;
356  int64 val64;
357  Oid typeid;
358  int typelen;
359  bool typebyval;
360  ParseCallbackState pcbstate;
361 
362  switch (nodeTag(value))
363  {
364  case T_Integer:
365  val = Int32GetDatum(intVal(value));
366 
367  typeid = INT4OID;
368  typelen = sizeof(int32);
369  typebyval = true;
370  break;
371 
372  case T_Float:
373  /* could be an oversize integer as well as a float ... */
374  if (scanint8(strVal(value), true, &val64))
375  {
376  /*
377  * It might actually fit in int32. Probably only INT_MIN can
378  * occur, but we'll code the test generally just to be sure.
379  */
380  int32 val32 = (int32) val64;
381 
382  if (val64 == (int64) val32)
383  {
384  val = Int32GetDatum(val32);
385 
386  typeid = INT4OID;
387  typelen = sizeof(int32);
388  typebyval = true;
389  }
390  else
391  {
392  val = Int64GetDatum(val64);
393 
394  typeid = INT8OID;
395  typelen = sizeof(int64);
396  typebyval = FLOAT8PASSBYVAL; /* int8 and float8 alike */
397  }
398  }
399  else
400  {
401  /* arrange to report location if numeric_in() fails */
402  setup_parser_errposition_callback(&pcbstate, pstate, location);
404  CStringGetDatum(strVal(value)),
406  Int32GetDatum(-1));
408 
409  typeid = NUMERICOID;
410  typelen = -1; /* variable len */
411  typebyval = false;
412  }
413  break;
414 
415  case T_String:
416 
417  /*
418  * We assume here that UNKNOWN's internal representation is the
419  * same as CSTRING
420  */
421  val = CStringGetDatum(strVal(value));
422 
423  typeid = UNKNOWNOID; /* will be coerced later */
424  typelen = -2; /* cstring-style varwidth type */
425  typebyval = false;
426  break;
427 
428  case T_BitString:
429  /* arrange to report location if bit_in() fails */
430  setup_parser_errposition_callback(&pcbstate, pstate, location);
432  CStringGetDatum(strVal(value)),
434  Int32GetDatum(-1));
436  typeid = BITOID;
437  typelen = -1;
438  typebyval = false;
439  break;
440 
441  case T_Null:
442  /* return a null const */
443  con = makeConst(UNKNOWNOID,
444  -1,
445  InvalidOid,
446  -2,
447  (Datum) 0,
448  true,
449  false);
450  con->location = location;
451  return con;
452 
453  default:
454  elog(ERROR, "unrecognized node type: %d", (int) nodeTag(value));
455  return NULL; /* keep compiler quiet */
456  }
457 
458  con = makeConst(typeid,
459  -1, /* typmod -1 is OK for all cases */
460  InvalidOid, /* all cases are uncollatable types */
461  typelen,
462  val,
463  false,
464  typebyval);
465  con->location = location;
466 
467  return con;
468 }
#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:299
signed int int32
Definition: c.h:417
void cancel_parser_errposition_callback(ParseCallbackState *pcbstate)
Definition: parse_node.c:161
#define ObjectIdGetDatum(X)
Definition: postgres.h:507
#define ERROR
Definition: elog.h:45
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:621
Datum Int64GetDatum(int64 X)
Definition: fmgr.c:1700
void setup_parser_errposition_callback(ParseCallbackState *pcbstate, ParseState *pstate, int location)
Definition: parse_node.c:145
#define DirectFunctionCall3(func, arg1, arg2, arg3)
Definition: fmgr.h:630
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:558
#define nodeTag(nodeptr)
Definition: nodes.h:533
Definition: nodes.h:293
Definition: nodes.h:290
#define Int32GetDatum(X)
Definition: postgres.h:479
#define intVal(v)
Definition: value.h:52
#define elog(elevel,...)
Definition: elog.h:228
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 44 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(), ATExecAttachPartition(), ATPrepAlterColumnType(), 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().

45 {
46  ParseState *pstate;
47 
48  pstate = palloc0(sizeof(ParseState));
49 
50  pstate->parentParseState = parentParseState;
51 
52  /* Fill in fields that don't start at null/false/zero */
53  pstate->p_next_resno = 1;
54  pstate->p_resolve_unknowns = true;
55 
56  if (parentParseState)
57  {
58  pstate->p_sourcetext = parentParseState->p_sourcetext;
59  /* all hooks are copied from parent */
60  pstate->p_pre_columnref_hook = parentParseState->p_pre_columnref_hook;
61  pstate->p_post_columnref_hook = parentParseState->p_post_columnref_hook;
62  pstate->p_paramref_hook = parentParseState->p_paramref_hook;
63  pstate->p_coerce_param_hook = parentParseState->p_coerce_param_hook;
64  pstate->p_ref_hook_state = parentParseState->p_ref_hook_state;
65  /* query environment stays in context for the whole parse analysis */
66  pstate->p_queryEnv = parentParseState->p_queryEnv;
67  }
68 
69  return pstate;
70 }
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:981
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 111 of file parse_node.c.

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

Referenced by addRangeTableEntryForCTE(), addRangeTableEntryForFunction(), AlterDatabase(), analyzeCTE(), analyzeCTETargetList(), array_subscript_transform(), 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(), cluster(), 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(), errorMissingColumn(), errorMissingRTE(), EvaluateParams(), ExecAlterDefaultPrivilegesStmt(), ExecAlterExtensionStmt(), ExecReindex(), ExecVacuum(), ExpandAllTables(), ExpandColumnRefStar(), ExplainQuery(), finalize_grouping_exprs_walker(), findTargetlistEntrySQL92(), fixed_paramref_hook(), GetColumnDefCollation(), hstore_subscript_transform(), 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(), transformPLAssignStmt(), 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().

112 {
113  int pos;
114 
115  /* No-op if location was not provided */
116  if (location < 0)
117  return 0;
118  /* Can't do anything if source text is not available */
119  if (pstate == NULL || pstate->p_sourcetext == NULL)
120  return 0;
121  /* Convert offset to character number */
122  pos = pg_mbstrlen_with_len(pstate->p_sourcetext, location) + 1;
123  /* And pass it to the ereport mechanism */
124  return errposition(pos);
125 }
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:1290

◆ pcb_error_callback()

static void pcb_error_callback ( void *  arg)
static

Definition at line 175 of file parse_node.c.

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

Referenced by setup_parser_errposition_callback().

176 {
177  ParseCallbackState *pcbstate = (ParseCallbackState *) arg;
178 
179  if (geterrcode() != ERRCODE_QUERY_CANCELED)
180  (void) parser_errposition(pcbstate->pstate, pcbstate->location);
181 }
int geterrcode(void)
Definition: elog.c:1405
ParseState * pstate
Definition: parse_node.h:302
int parser_errposition(ParseState *pstate, int location)
Definition: parse_node.c:111
void * arg

◆ setup_parser_errposition_callback()

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

Definition at line 145 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().

147 {
148  /* Setup error traceback support for ereport() */
149  pcbstate->pstate = pstate;
150  pcbstate->location = location;
152  pcbstate->errcallback.arg = (void *) pcbstate;
154  error_context_stack = &pcbstate->errcallback;
155 }
ErrorContextCallback errcallback
Definition: parse_node.h:304
void(* callback)(void *arg)
Definition: elog.h:243
struct ErrorContextCallback * previous
Definition: elog.h:242
ErrorContextCallback * error_context_stack
Definition: elog.c:93
ParseState * pstate
Definition: parse_node.h:302
static void pcb_error_callback(void *arg)
Definition: parse_node.c:175

◆ transformContainerSubscripts()

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

Definition at line 248 of file parse_node.c.

References ereport, errcode(), errmsg(), ERROR, exprLocation(), format_type_be(), getSubscriptingRoutines(), idx(), A_Indices::is_slice, lfirst_node, makeNode, OidIsValid, parser_errposition(), SubscriptingRef::refassgnexpr, SubscriptingRef::refcontainertype, SubscriptingRef::refelemtype, SubscriptingRef::refexpr, SubscriptingRef::refrestype, SubscriptingRef::reftypmod, SubscriptRoutines::transform, and transformContainerType().

Referenced by transformAssignmentSubscripts(), and transformIndirection().

254 {
255  SubscriptingRef *sbsref;
256  const SubscriptRoutines *sbsroutines;
257  Oid elementType;
258  bool isSlice = false;
259  ListCell *idx;
260 
261  /*
262  * Determine the actual container type, smashing any domain. In the
263  * assignment case the caller already did this, since it also needs to
264  * know the actual container type.
265  */
266  if (!isAssignment)
267  transformContainerType(&containerType, &containerTypMod);
268 
269  /*
270  * Verify that the container type is subscriptable, and get its support
271  * functions and typelem.
272  */
273  sbsroutines = getSubscriptingRoutines(containerType, &elementType);
274  if (!sbsroutines)
275  ereport(ERROR,
276  (errcode(ERRCODE_DATATYPE_MISMATCH),
277  errmsg("cannot subscript type %s because it does not support subscripting",
278  format_type_be(containerType)),
279  parser_errposition(pstate, exprLocation(containerBase))));
280 
281  /*
282  * Detect whether any of the indirection items are slice specifiers.
283  *
284  * A list containing only simple subscripts refers to a single container
285  * element. If any of the items are slice specifiers (lower:upper), then
286  * the subscript expression means a container slice operation.
287  */
288  foreach(idx, indirection)
289  {
290  A_Indices *ai = lfirst_node(A_Indices, idx);
291 
292  if (ai->is_slice)
293  {
294  isSlice = true;
295  break;
296  }
297  }
298 
299  /*
300  * Ready to build the SubscriptingRef node.
301  */
302  sbsref = makeNode(SubscriptingRef);
303 
304  sbsref->refcontainertype = containerType;
305  sbsref->refelemtype = elementType;
306  /* refrestype is to be set by container-specific logic */
307  sbsref->reftypmod = containerTypMod;
308  /* refcollid will be set by parse_collate.c */
309  /* refupperindexpr, reflowerindexpr are to be set by container logic */
310  sbsref->refexpr = (Expr *) containerBase;
311  sbsref->refassgnexpr = NULL; /* caller will fill if it's an assignment */
312 
313  /*
314  * Call the container-type-specific logic to transform the subscripts and
315  * determine the subscripting result type.
316  */
317  sbsroutines->transform(sbsref, indirection, pstate,
318  isSlice, isAssignment);
319 
320  /*
321  * Verify we got a valid type (this defends, for example, against someone
322  * using array_subscript_handler as typsubscript without setting typelem).
323  */
324  if (!OidIsValid(sbsref->refrestype))
325  ereport(ERROR,
326  (errcode(ERRCODE_DATATYPE_MISMATCH),
327  errmsg("cannot subscript type %s because it does not support subscripting",
328  format_type_be(containerType))));
329 
330  return sbsref;
331 }
int exprLocation(const Node *expr)
Definition: nodeFuncs.c:1231
int errcode(int sqlerrcode)
Definition: elog.c:704
char * format_type_be(Oid type_oid)
Definition: format_type.c:339
Datum idx(PG_FUNCTION_ARGS)
Definition: _int_op.c:259
unsigned int Oid
Definition: postgres_ext.h:31
#define OidIsValid(objectId)
Definition: c.h:698
const struct SubscriptRoutines * getSubscriptingRoutines(Oid typid, Oid *typelemp)
Definition: lsyscache.c:3050
bool is_slice
Definition: parsenodes.h:383
#define ERROR
Definition: elog.h:45
#define lfirst_node(type, lc)
Definition: pg_list.h:172
void transformContainerType(Oid *containerType, int32 *containerTypmod)
Definition: parse_node.c:194
#define ereport(elevel,...)
Definition: elog.h:155
#define makeNode(_type_)
Definition: nodes.h:576
int parser_errposition(ParseState *pstate, int location)
Definition: parse_node.c:111
Expr * refassgnexpr
Definition: primnodes.h:446
int errmsg(const char *fmt,...)
Definition: elog.c:915
SubscriptTransform transform
Definition: subscripting.h:160
Oid refcontainertype
Definition: primnodes.h:434
Expr * refexpr
Definition: primnodes.h:444

◆ transformContainerType()

void transformContainerType ( Oid containerType,
int32 containerTypmod 
)

Definition at line 194 of file parse_node.c.

References getBaseTypeAndTypmod().

Referenced by transformAssignmentSubscripts(), and transformContainerSubscripts().

195 {
196  /*
197  * If the input is a domain, smash to base type, and extract the actual
198  * typmod to be applied to the base type. Subscripting a domain is an
199  * operation that necessarily works on the base container type, not the
200  * domain itself. (Note that we provide no method whereby the creator of a
201  * domain over a container type could hide its ability to be subscripted.)
202  */
203  *containerType = getBaseTypeAndTypmod(*containerType, containerTypmod);
204 
205  /*
206  * We treat int2vector and oidvector as though they were domains over
207  * int2[] and oid[]. This is needed because array slicing could create an
208  * array that doesn't satisfy the dimensionality constraints of the
209  * xxxvector type; so we want the result of a slice operation to be
210  * considered to be of the more general type.
211  */
212  if (*containerType == INT2VECTOROID)
213  *containerType = INT2ARRAYOID;
214  else if (*containerType == OIDVECTOROID)
215  *containerType = OIDARRAYOID;
216 }
Oid getBaseTypeAndTypmod(Oid typid, int32 *typmod)
Definition: lsyscache.c:2458