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rewriteSupport.h File Reference
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Macros

#define  ViewSelectRuleName   "_RETURN"
 

Functions

bool  IsDefinedRewriteRule (Oid owningRel, const char *ruleName)
 
void  SetRelationRuleStatus (Oid relationId, bool relHasRules)
 
Oid  get_rewrite_oid (Oid relid, const char *rulename, bool missing_ok)
 

Macro Definition Documentation

◆ ViewSelectRuleName

#define ViewSelectRuleName   "_RETURN"

Definition at line 18 of file rewriteSupport.h.

Function Documentation

◆ get_rewrite_oid()

Oid get_rewrite_oid ( Oid  relid,
const char *  rulename,
bool  missing_ok 
)

Definition at line 92 of file rewriteSupport.c.

93{
94 HeapTuple tuple;
95 Form_pg_rewrite ruleform;
96 Oid ruleoid;
97
98 /* Find the rule's pg_rewrite tuple, get its OID */
99 tuple = SearchSysCache2(RULERELNAME,
100 ObjectIdGetDatum(relid),
101 PointerGetDatum(rulename));
102 if (!HeapTupleIsValid(tuple))
103 {
104 if (missing_ok)
105 return InvalidOid;
107 (errcode(ERRCODE_UNDEFINED_OBJECT),
108 errmsg("rule \"%s\" for relation \"%s\" does not exist",
109 rulename, get_rel_name(relid))));
110 }
111 ruleform = (Form_pg_rewrite) GETSTRUCT(tuple);
112 Assert(relid == ruleform->ev_class);
113 ruleoid = ruleform->oid;
114 ReleaseSysCache(tuple);
115 return ruleoid;
116}
int errcode(int sqlerrcode)
Definition: elog.c:854
int errmsg(const char *fmt,...)
Definition: elog.c:1071
#define ERROR
Definition: elog.h:39
#define ereport(elevel,...)
Definition: elog.h:150
Assert(PointerIsAligned(start, uint64))
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
static void * GETSTRUCT(const HeapTupleData *tuple)
Definition: htup_details.h:728
char * get_rel_name(Oid relid)
Definition: lsyscache.c:2095
FormData_pg_rewrite * Form_pg_rewrite
Definition: pg_rewrite.h:52
static Datum PointerGetDatum(const void *X)
Definition: postgres.h:332
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:262
#define InvalidOid
Definition: postgres_ext.h:37
unsigned int Oid
Definition: postgres_ext.h:32
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:264
HeapTuple SearchSysCache2(int cacheId, Datum key1, Datum key2)
Definition: syscache.c:230

References Assert(), ereport, errcode(), errmsg(), ERROR, get_rel_name(), GETSTRUCT(), HeapTupleIsValid, InvalidOid, ObjectIdGetDatum(), PointerGetDatum(), ReleaseSysCache(), and SearchSysCache2().

Referenced by get_object_address_relobject().

◆ IsDefinedRewriteRule()

bool IsDefinedRewriteRule ( Oid  owningRel,
const char *  ruleName 
)

Definition at line 32 of file rewriteSupport.c.

33{
34 return SearchSysCacheExists2(RULERELNAME,
35 ObjectIdGetDatum(owningRel),
36 PointerGetDatum(ruleName));
37}
#define SearchSysCacheExists2(cacheId, key1, key2)
Definition: syscache.h:102

References ObjectIdGetDatum(), PointerGetDatum(), and SearchSysCacheExists2.

Referenced by RenameRewriteRule().

◆ SetRelationRuleStatus()

void SetRelationRuleStatus ( Oid  relationId,
bool  relHasRules 
)

Definition at line 53 of file rewriteSupport.c.

54{
55 Relation relationRelation;
56 HeapTuple tuple;
57 Form_pg_class classForm;
58
59 /*
60 * Find the tuple to update in pg_class, using syscache for the lookup.
61 */
62 relationRelation = table_open(RelationRelationId, RowExclusiveLock);
63 tuple = SearchSysCacheCopy1(RELOID, ObjectIdGetDatum(relationId));
64 if (!HeapTupleIsValid(tuple))
65 elog(ERROR, "cache lookup failed for relation %u", relationId);
66 classForm = (Form_pg_class) GETSTRUCT(tuple);
67
68 if (classForm->relhasrules != relHasRules)
69 {
70 /* Do the update */
71 classForm->relhasrules = relHasRules;
72
73 CatalogTupleUpdate(relationRelation, &tuple->t_self, tuple);
74 }
75 else
76 {
77 /* no need to change tuple, but force relcache rebuild anyway */
79 }
80
81 heap_freetuple(tuple);
82 table_close(relationRelation, RowExclusiveLock);
83}
#define elog(elevel,...)
Definition: elog.h:226
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1435
void CatalogTupleUpdate(Relation heapRel, ItemPointer otid, HeapTuple tup)
Definition: indexing.c:313
void CacheInvalidateRelcacheByTuple(HeapTuple classTuple)
Definition: inval.c:1665
#define RowExclusiveLock
Definition: lockdefs.h:38
FormData_pg_class * Form_pg_class
Definition: pg_class.h:156
ItemPointerData t_self
Definition: htup.h:65
Definition: rel.h:56
#define SearchSysCacheCopy1(cacheId, key1)
Definition: syscache.h:91
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:126
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:40

References CacheInvalidateRelcacheByTuple(), CatalogTupleUpdate(), elog, ERROR, GETSTRUCT(), heap_freetuple(), HeapTupleIsValid, ObjectIdGetDatum(), RowExclusiveLock, SearchSysCacheCopy1, HeapTupleData::t_self, table_close(), and table_open().

Referenced by DefineQueryRewrite().

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