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pg_cast.h File Reference
#include "catalog/dependency.h"
#include "catalog/genbki.h"
#include "catalog/pg_cast_d.h"
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Typedefs

typedef FormData_pg_castForm_pg_cast
 

Functions

 CATALOG (pg_cast, 2605, CastRelationId)
 
 DECLARE_UNIQUE_INDEX_PKEY (pg_cast_oid_index, 2660, CastOidIndexId, pg_cast, btree(oid oid_ops))
 
 DECLARE_UNIQUE_INDEX (pg_cast_source_target_index, 2661, CastSourceTargetIndexId, pg_cast, btree(castsource oid_ops, casttarget oid_ops))
 
 MAKE_SYSCACHE (CASTSOURCETARGET, pg_cast_source_target_index, 256)
 
ObjectAddress CastCreate (Oid sourcetypeid, Oid targettypeid, Oid funcid, Oid incastid, Oid outcastid, char castcontext, char castmethod, DependencyType behavior)
 

Variables

 FormData_pg_cast
 

Typedef Documentation

◆ Form_pg_cast

Definition at line 57 of file pg_cast.h.

Function Documentation

◆ CastCreate()

ObjectAddress CastCreate ( Oid  sourcetypeid,
Oid  targettypeid,
Oid  funcid,
Oid  incastid,
Oid  outcastid,
char  castcontext,
char  castmethod,
DependencyType  behavior 
)

Definition at line 49 of file pg_cast.c.

52 {
53  Relation relation;
54  HeapTuple tuple;
55  Oid castid;
56  Datum values[Natts_pg_cast];
57  bool nulls[Natts_pg_cast] = {0};
58  ObjectAddress myself,
59  referenced;
60  ObjectAddresses *addrs;
61 
62  relation = table_open(CastRelationId, RowExclusiveLock);
63 
64  /*
65  * Check for duplicate. This is just to give a friendly error message,
66  * the unique index would catch it anyway (so no need to sweat about race
67  * conditions).
68  */
69  tuple = SearchSysCache2(CASTSOURCETARGET,
70  ObjectIdGetDatum(sourcetypeid),
71  ObjectIdGetDatum(targettypeid));
72  if (HeapTupleIsValid(tuple))
73  ereport(ERROR,
75  errmsg("cast from type %s to type %s already exists",
76  format_type_be(sourcetypeid),
77  format_type_be(targettypeid))));
78 
79  /* ready to go */
80  castid = GetNewOidWithIndex(relation, CastOidIndexId, Anum_pg_cast_oid);
81  values[Anum_pg_cast_oid - 1] = ObjectIdGetDatum(castid);
82  values[Anum_pg_cast_castsource - 1] = ObjectIdGetDatum(sourcetypeid);
83  values[Anum_pg_cast_casttarget - 1] = ObjectIdGetDatum(targettypeid);
84  values[Anum_pg_cast_castfunc - 1] = ObjectIdGetDatum(funcid);
85  values[Anum_pg_cast_castcontext - 1] = CharGetDatum(castcontext);
86  values[Anum_pg_cast_castmethod - 1] = CharGetDatum(castmethod);
87 
88  tuple = heap_form_tuple(RelationGetDescr(relation), values, nulls);
89 
90  CatalogTupleInsert(relation, tuple);
91 
92  addrs = new_object_addresses();
93 
94  /* make dependency entries */
95  ObjectAddressSet(myself, CastRelationId, castid);
96 
97  /* dependency on source type */
98  ObjectAddressSet(referenced, TypeRelationId, sourcetypeid);
99  add_exact_object_address(&referenced, addrs);
100 
101  /* dependency on target type */
102  ObjectAddressSet(referenced, TypeRelationId, targettypeid);
103  add_exact_object_address(&referenced, addrs);
104 
105  /* dependency on function */
106  if (OidIsValid(funcid))
107  {
108  ObjectAddressSet(referenced, ProcedureRelationId, funcid);
109  add_exact_object_address(&referenced, addrs);
110  }
111 
112  /* dependencies on casts required for function */
113  if (OidIsValid(incastid))
114  {
115  ObjectAddressSet(referenced, CastRelationId, incastid);
116  add_exact_object_address(&referenced, addrs);
117  }
118  if (OidIsValid(outcastid))
119  {
120  ObjectAddressSet(referenced, CastRelationId, outcastid);
121  add_exact_object_address(&referenced, addrs);
122  }
123 
124  record_object_address_dependencies(&myself, addrs, behavior);
125  free_object_addresses(addrs);
126 
127  /* dependency on extension */
128  recordDependencyOnCurrentExtension(&myself, false);
129 
130  /* Post creation hook for new cast */
131  InvokeObjectPostCreateHook(CastRelationId, castid, 0);
132 
133  heap_freetuple(tuple);
134 
135  table_close(relation, RowExclusiveLock);
136 
137  return myself;
138 }
static Datum values[MAXATTR]
Definition: bootstrap.c:152
#define OidIsValid(objectId)
Definition: c.h:762
Oid GetNewOidWithIndex(Relation relation, Oid indexId, AttrNumber oidcolumn)
Definition: catalog.c:391
void record_object_address_dependencies(const ObjectAddress *depender, ObjectAddresses *referenced, DependencyType behavior)
Definition: dependency.c:2738
ObjectAddresses * new_object_addresses(void)
Definition: dependency.c:2483
void add_exact_object_address(const ObjectAddress *object, ObjectAddresses *addrs)
Definition: dependency.c:2529
void free_object_addresses(ObjectAddresses *addrs)
Definition: dependency.c:2769
int errcode(int sqlerrcode)
Definition: elog.c:859
int errmsg(const char *fmt,...)
Definition: elog.c:1072
#define ERROR
Definition: elog.h:39
#define ereport(elevel,...)
Definition: elog.h:149
char * format_type_be(Oid type_oid)
Definition: format_type.c:343
HeapTuple heap_form_tuple(TupleDesc tupleDescriptor, const Datum *values, const bool *isnull)
Definition: heaptuple.c:1116
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1434
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
void CatalogTupleInsert(Relation heapRel, HeapTuple tup)
Definition: indexing.c:233
#define RowExclusiveLock
Definition: lockdefs.h:38
#define InvokeObjectPostCreateHook(classId, objectId, subId)
Definition: objectaccess.h:173
#define ObjectAddressSet(addr, class_id, object_id)
Definition: objectaddress.h:40
void recordDependencyOnCurrentExtension(const ObjectAddress *object, bool isReplace)
Definition: pg_depend.c:192
uintptr_t Datum
Definition: postgres.h:64
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:252
static Datum CharGetDatum(char X)
Definition: postgres.h:122
unsigned int Oid
Definition: postgres_ext.h:31
#define RelationGetDescr(relation)
Definition: rel.h:531
#define ERRCODE_DUPLICATE_OBJECT
Definition: streamutil.c:32
HeapTuple SearchSysCache2(int cacheId, Datum key1, Datum key2)
Definition: syscache.c:229
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:126
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:40

References add_exact_object_address(), CatalogTupleInsert(), CharGetDatum(), ereport, errcode(), ERRCODE_DUPLICATE_OBJECT, errmsg(), ERROR, format_type_be(), free_object_addresses(), GetNewOidWithIndex(), heap_form_tuple(), heap_freetuple(), HeapTupleIsValid, InvokeObjectPostCreateHook, new_object_addresses(), ObjectAddressSet, ObjectIdGetDatum(), OidIsValid, record_object_address_dependencies(), recordDependencyOnCurrentExtension(), RelationGetDescr, RowExclusiveLock, SearchSysCache2(), table_close(), table_open(), and values.

Referenced by CreateCast(), and DefineRange().

◆ CATALOG()

CATALOG ( pg_cast  ,
2605  ,
CastRelationId   
)

Definition at line 32 of file pg_cast.h.

33 {
34  Oid oid; /* oid */
35 
36  /* source datatype for cast */
37  Oid castsource BKI_LOOKUP(pg_type);
38 
39  /* destination datatype for cast */
40  Oid casttarget BKI_LOOKUP(pg_type);
41 
42  /* cast function; 0 = binary coercible */
43  Oid castfunc BKI_LOOKUP_OPT(pg_proc);
44 
45  /* contexts in which cast can be used */
46  char castcontext;
47 
48  /* cast method */
49  char castmethod;
#define BKI_LOOKUP(catalog)
Definition: genbki.h:46
#define BKI_LOOKUP_OPT(catalog)
Definition: genbki.h:47
FormData_pg_cast
Definition: pg_cast.h:50

References BKI_LOOKUP, and BKI_LOOKUP_OPT.

◆ DECLARE_UNIQUE_INDEX()

DECLARE_UNIQUE_INDEX ( pg_cast_source_target_index  ,
2661  ,
CastSourceTargetIndexId  ,
pg_cast  ,
btree(castsource oid_ops, casttarget oid_ops)   
)

◆ DECLARE_UNIQUE_INDEX_PKEY()

DECLARE_UNIQUE_INDEX_PKEY ( pg_cast_oid_index  ,
2660  ,
CastOidIndexId  ,
pg_cast  ,
btree(oid oid_ops)   
)

◆ MAKE_SYSCACHE()

MAKE_SYSCACHE ( CASTSOURCETARGET  ,
pg_cast_source_target_index  ,
256   
)

Variable Documentation

◆ FormData_pg_cast

FormData_pg_cast

Definition at line 50 of file pg_cast.h.