* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/utils/rel.h,v 1.89 2006/04/25 22:46:05 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/utils/rel.h,v 1.93 2006/12/23 00:43:13 tgl Exp $
*
*-------------------------------------------------------------------------
*/
FmgrInfo ambulkdelete;
FmgrInfo amvacuumcleanup;
FmgrInfo amcostestimate;
+ FmgrInfo amoptions;
} RelationAmInfo;
MemoryContext rd_rulescxt; /* private memory cxt for rd_rules, if any */
TriggerDesc *trigdesc; /* Trigger info, or NULL if rel has none */
+ /*
+ * rd_options is set whenever rd_rel is loaded into the relcache entry.
+ * Note that you can NOT look into rd_rel for this data. NULL means "use
+ * defaults".
+ */
+ bytea *rd_options; /* parsed pg_class.reloptions */
+
/* These are non-NULL only for an index relation: */
Form_pg_index rd_index; /* pg_index tuple describing this index */
struct HeapTupleData *rd_indextuple; /* all of pg_index tuple */
/* "struct HeapTupleData *" avoids need to include htup.h here */
- oidvector *rd_indclass; /* extracted pointer to rd_index field */
Form_pg_am rd_am; /* pg_am tuple for index's AM */
/*
* index access support info (used only for an index relation)
*
* Note: only default operators and support procs for each opclass are
- * cached, namely those with subtype zero. The arrays are indexed by
- * strategy or support number, which is a sufficient identifier given that
- * restriction.
+ * cached, namely those with lefttype and righttype equal to the opclass's
+ * opcintype. The arrays are indexed by strategy or support number,
+ * which is a sufficient identifier given that restriction.
*
* Note: rd_amcache is available for index AMs to cache private data about
* an index. This must be just a cache since it may get reset at any time
* (in particular, it will get reset by a relcache inval message for the
- * index). If used, it must point to a single memory chunk palloc'd in
+ * index). If used, it must point to a single memory chunk palloc'd in
* rd_indexcxt. A relcache reset will include freeing that chunk and
* setting rd_amcache = NULL.
*/
MemoryContext rd_indexcxt; /* private memory cxt for this stuff */
RelationAmInfo *rd_aminfo; /* lookup info for funcs found in pg_am */
+ Oid *rd_opfamily; /* OIDs of op families for each index col */
+ Oid *rd_opcintype; /* OIDs of opclass declared input data types */
Oid *rd_operator; /* OIDs of index operators */
RegProcedure *rd_support; /* OIDs of support procedures */
FmgrInfo *rd_supportinfo; /* lookup info for support procedures */
/*
+ * StdRdOptions
+ * Standard contents of rd_options for heaps and generic indexes.
+ *
+ * RelationGetFillFactor() and RelationGetTargetPageFreeSpace() can only
+ * be applied to relations that use this format or a superset for
+ * private options data.
+ */
+typedef struct StdRdOptions
+{
+ int32 vl_len; /* required to be a bytea */
+ int fillfactor; /* page fill factor in percent (0..100) */
+} StdRdOptions;
+
+#define HEAP_MIN_FILLFACTOR 10
+#define HEAP_DEFAULT_FILLFACTOR 100
+
+/*
+ * RelationGetFillFactor
+ * Returns the relation's fillfactor. Note multiple eval of argument!
+ */
+#define RelationGetFillFactor(relation, defaultff) \
+ ((relation)->rd_options ? \
+ ((StdRdOptions *) (relation)->rd_options)->fillfactor : (defaultff))
+
+/*
+ * RelationGetTargetPageUsage
+ * Returns the relation's desired space usage per page in bytes.
+ */
+#define RelationGetTargetPageUsage(relation, defaultff) \
+ (BLCKSZ * RelationGetFillFactor(relation, defaultff) / 100)
+
+/*
+ * RelationGetTargetPageFreeSpace
+ * Returns the relation's desired freespace per page in bytes.
+ */
+#define RelationGetTargetPageFreeSpace(relation, defaultff) \
+ (BLCKSZ * (100 - RelationGetFillFactor(relation, defaultff)) / 100)
+
+/*
* RelationIsValid
* True iff relation descriptor is valid.
*/
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