1 /*-------------------------------------------------------------------------
4 * System catalog cache definitions.
6 * See also lsyscache.h, which provides convenience routines for
7 * common cache-lookup operations.
9 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
10 * Portions Copyright (c) 1994, Regents of the University of California
12 * src/include/utils/syscache.h
14 *-------------------------------------------------------------------------
19 #include "access/attnum.h"
20 #include "access/htup.h"
21 /* we intentionally do not include utils/catcache.h here */
24 * SysCache identifiers.
26 * The order of these identifiers must match the order
27 * of the entries in the array cacheinfo[] in syscache.c.
28 * Keep them in alphabetical order (renumbering only costs a
32 enum SysCacheIdentifier
61 FOREIGNDATAWRAPPERNAME,
62 FOREIGNDATAWRAPPEROID,
111 USERMAPPINGUSERSERVER
113 #define SysCacheSize (USERMAPPINGUSERSERVER + 1)
116 extern void InitCatalogCache(void);
117 extern void InitCatalogCachePhase2(void);
119 extern HeapTuple SearchSysCache(int cacheId,
120 Datum key1, Datum key2, Datum key3, Datum key4);
123 * The use of argument specific numbers is encouraged. They're faster, and
124 * insulates the caller from changes in the maximum number of keys.
126 extern HeapTuple SearchSysCache1(int cacheId,
128 extern HeapTuple SearchSysCache2(int cacheId,
129 Datum key1, Datum key2);
130 extern HeapTuple SearchSysCache3(int cacheId,
131 Datum key1, Datum key2, Datum key3);
132 extern HeapTuple SearchSysCache4(int cacheId,
133 Datum key1, Datum key2, Datum key3, Datum key4);
135 extern void ReleaseSysCache(HeapTuple tuple);
137 /* convenience routines */
138 extern HeapTuple SearchSysCacheCopy(int cacheId,
139 Datum key1, Datum key2, Datum key3, Datum key4);
140 extern bool SearchSysCacheExists(int cacheId,
141 Datum key1, Datum key2, Datum key3, Datum key4);
142 extern Oid GetSysCacheOid(int cacheId, AttrNumber oidcol,
143 Datum key1, Datum key2, Datum key3, Datum key4);
145 extern HeapTuple SearchSysCacheAttName(Oid relid, const char *attname);
146 extern HeapTuple SearchSysCacheCopyAttName(Oid relid, const char *attname);
147 extern bool SearchSysCacheExistsAttName(Oid relid, const char *attname);
149 extern HeapTuple SearchSysCacheAttNum(Oid relid, int16 attnum);
150 extern HeapTuple SearchSysCacheCopyAttNum(Oid relid, int16 attnum);
152 extern Datum SysCacheGetAttr(int cacheId, HeapTuple tup,
153 AttrNumber attributeNumber, bool *isNull);
155 extern uint32 GetSysCacheHashValue(int cacheId,
156 Datum key1, Datum key2, Datum key3, Datum key4);
158 /* list-search interface. Users of this must import catcache.h too */
160 extern struct catclist *SearchSysCacheList(int cacheId, int nkeys,
161 Datum key1, Datum key2, Datum key3);
163 extern void SysCacheInvalidate(int cacheId, uint32 hashValue);
165 extern bool RelationInvalidatesSnapshotsOnly(Oid relid);
166 extern bool RelationHasSysCache(Oid relid);
167 extern bool RelationSupportsSysCache(Oid relid);
170 * The use of the macros below rather than direct calls to the corresponding
171 * functions is encouraged, as it insulates the caller from changes in the
172 * maximum number of keys.
174 #define SearchSysCacheCopy1(cacheId, key1) \
175 SearchSysCacheCopy(cacheId, key1, 0, 0, 0)
176 #define SearchSysCacheCopy2(cacheId, key1, key2) \
177 SearchSysCacheCopy(cacheId, key1, key2, 0, 0)
178 #define SearchSysCacheCopy3(cacheId, key1, key2, key3) \
179 SearchSysCacheCopy(cacheId, key1, key2, key3, 0)
180 #define SearchSysCacheCopy4(cacheId, key1, key2, key3, key4) \
181 SearchSysCacheCopy(cacheId, key1, key2, key3, key4)
183 #define SearchSysCacheExists1(cacheId, key1) \
184 SearchSysCacheExists(cacheId, key1, 0, 0, 0)
185 #define SearchSysCacheExists2(cacheId, key1, key2) \
186 SearchSysCacheExists(cacheId, key1, key2, 0, 0)
187 #define SearchSysCacheExists3(cacheId, key1, key2, key3) \
188 SearchSysCacheExists(cacheId, key1, key2, key3, 0)
189 #define SearchSysCacheExists4(cacheId, key1, key2, key3, key4) \
190 SearchSysCacheExists(cacheId, key1, key2, key3, key4)
192 #define GetSysCacheOid1(cacheId, oidcol, key1) \
193 GetSysCacheOid(cacheId, oidcol, key1, 0, 0, 0)
194 #define GetSysCacheOid2(cacheId, oidcol, key1, key2) \
195 GetSysCacheOid(cacheId, oidcol, key1, key2, 0, 0)
196 #define GetSysCacheOid3(cacheId, oidcol, key1, key2, key3) \
197 GetSysCacheOid(cacheId, oidcol, key1, key2, key3, 0)
198 #define GetSysCacheOid4(cacheId, oidcol, key1, key2, key3, key4) \
199 GetSysCacheOid(cacheId, oidcol, key1, key2, key3, key4)
201 #define GetSysCacheHashValue1(cacheId, key1) \
202 GetSysCacheHashValue(cacheId, key1, 0, 0, 0)
203 #define GetSysCacheHashValue2(cacheId, key1, key2) \
204 GetSysCacheHashValue(cacheId, key1, key2, 0, 0)
205 #define GetSysCacheHashValue3(cacheId, key1, key2, key3) \
206 GetSysCacheHashValue(cacheId, key1, key2, key3, 0)
207 #define GetSysCacheHashValue4(cacheId, key1, key2, key3, key4) \
208 GetSysCacheHashValue(cacheId, key1, key2, key3, key4)
210 #define SearchSysCacheList1(cacheId, key1) \
211 SearchSysCacheList(cacheId, 1, key1, 0, 0)
212 #define SearchSysCacheList2(cacheId, key1, key2) \
213 SearchSysCacheList(cacheId, 2, key1, key2, 0)
214 #define SearchSysCacheList3(cacheId, key1, key2, key3) \
215 SearchSysCacheList(cacheId, 3, key1, key2, key3)
217 #define ReleaseSysCacheList(x) ReleaseCatCacheList(x)
219 #endif /* SYSCACHE_H */