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) 1996-2017, 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,
110 USERMAPPINGUSERSERVER
112 #define SysCacheSize (USERMAPPINGUSERSERVER + 1)
115 extern void InitCatalogCache(void);
116 extern void InitCatalogCachePhase2(void);
118 extern HeapTuple SearchSysCache(int cacheId,
119 Datum key1, Datum key2, Datum key3, Datum key4);
120 extern void ReleaseSysCache(HeapTuple tuple);
122 /* convenience routines */
123 extern HeapTuple SearchSysCacheCopy(int cacheId,
124 Datum key1, Datum key2, Datum key3, Datum key4);
125 extern bool SearchSysCacheExists(int cacheId,
126 Datum key1, Datum key2, Datum key3, Datum key4);
127 extern Oid GetSysCacheOid(int cacheId,
128 Datum key1, Datum key2, Datum key3, Datum key4);
130 extern HeapTuple SearchSysCacheAttName(Oid relid, const char *attname);
131 extern HeapTuple SearchSysCacheCopyAttName(Oid relid, const char *attname);
132 extern bool SearchSysCacheExistsAttName(Oid relid, const char *attname);
134 extern Datum SysCacheGetAttr(int cacheId, HeapTuple tup,
135 AttrNumber attributeNumber, bool *isNull);
137 extern uint32 GetSysCacheHashValue(int cacheId,
138 Datum key1, Datum key2, Datum key3, Datum key4);
140 /* list-search interface. Users of this must import catcache.h too */
142 extern struct catclist *SearchSysCacheList(int cacheId, int nkeys,
143 Datum key1, Datum key2, Datum key3, Datum key4);
145 extern void SysCacheInvalidate(int cacheId, uint32 hashValue);
147 extern bool RelationInvalidatesSnapshotsOnly(Oid relid);
148 extern bool RelationHasSysCache(Oid relid);
149 extern bool RelationSupportsSysCache(Oid relid);
152 * The use of the macros below rather than direct calls to the corresponding
153 * functions is encouraged, as it insulates the caller from changes in the
154 * maximum number of keys.
156 #define SearchSysCache1(cacheId, key1) \
157 SearchSysCache(cacheId, key1, 0, 0, 0)
158 #define SearchSysCache2(cacheId, key1, key2) \
159 SearchSysCache(cacheId, key1, key2, 0, 0)
160 #define SearchSysCache3(cacheId, key1, key2, key3) \
161 SearchSysCache(cacheId, key1, key2, key3, 0)
162 #define SearchSysCache4(cacheId, key1, key2, key3, key4) \
163 SearchSysCache(cacheId, key1, key2, key3, key4)
165 #define SearchSysCacheCopy1(cacheId, key1) \
166 SearchSysCacheCopy(cacheId, key1, 0, 0, 0)
167 #define SearchSysCacheCopy2(cacheId, key1, key2) \
168 SearchSysCacheCopy(cacheId, key1, key2, 0, 0)
169 #define SearchSysCacheCopy3(cacheId, key1, key2, key3) \
170 SearchSysCacheCopy(cacheId, key1, key2, key3, 0)
171 #define SearchSysCacheCopy4(cacheId, key1, key2, key3, key4) \
172 SearchSysCacheCopy(cacheId, key1, key2, key3, key4)
174 #define SearchSysCacheExists1(cacheId, key1) \
175 SearchSysCacheExists(cacheId, key1, 0, 0, 0)
176 #define SearchSysCacheExists2(cacheId, key1, key2) \
177 SearchSysCacheExists(cacheId, key1, key2, 0, 0)
178 #define SearchSysCacheExists3(cacheId, key1, key2, key3) \
179 SearchSysCacheExists(cacheId, key1, key2, key3, 0)
180 #define SearchSysCacheExists4(cacheId, key1, key2, key3, key4) \
181 SearchSysCacheExists(cacheId, key1, key2, key3, key4)
183 #define GetSysCacheOid1(cacheId, key1) \
184 GetSysCacheOid(cacheId, key1, 0, 0, 0)
185 #define GetSysCacheOid2(cacheId, key1, key2) \
186 GetSysCacheOid(cacheId, key1, key2, 0, 0)
187 #define GetSysCacheOid3(cacheId, key1, key2, key3) \
188 GetSysCacheOid(cacheId, key1, key2, key3, 0)
189 #define GetSysCacheOid4(cacheId, key1, key2, key3, key4) \
190 GetSysCacheOid(cacheId, key1, key2, key3, key4)
192 #define GetSysCacheHashValue1(cacheId, key1) \
193 GetSysCacheHashValue(cacheId, key1, 0, 0, 0)
194 #define GetSysCacheHashValue2(cacheId, key1, key2) \
195 GetSysCacheHashValue(cacheId, key1, key2, 0, 0)
196 #define GetSysCacheHashValue3(cacheId, key1, key2, key3) \
197 GetSysCacheHashValue(cacheId, key1, key2, key3, 0)
198 #define GetSysCacheHashValue4(cacheId, key1, key2, key3, key4) \
199 GetSysCacheHashValue(cacheId, key1, key2, key3, key4)
201 #define SearchSysCacheList1(cacheId, key1) \
202 SearchSysCacheList(cacheId, 1, key1, 0, 0, 0)
203 #define SearchSysCacheList2(cacheId, key1, key2) \
204 SearchSysCacheList(cacheId, 2, key1, key2, 0, 0)
205 #define SearchSysCacheList3(cacheId, key1, key2, key3) \
206 SearchSysCacheList(cacheId, 3, key1, key2, key3, 0)
207 #define SearchSysCacheList4(cacheId, key1, key2, key3, key4) \
208 SearchSysCacheList(cacheId, 4, key1, key2, key3, key4)
210 #define ReleaseSysCacheList(x) ReleaseCatCacheList(x)
212 #endif /* SYSCACHE_H */