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Add hooks to let plugins override the planner's lookups in pg_statistic.

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Simon Riggs, with some editorialization by me.
This commit is contained in:
Tom Lane
2008-09-28 19:51:40 +00:00
parent bc965e840a
commit 7b7df9f0b1
4 changed files with 109 additions and 23 deletions
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6
src/include/utils/lsyscache.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/lsyscache.h,v 1.125 2008/08/02 21:32:01 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/lsyscache.h,v 1.126 2008/09/28 19:51:40 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -26,6 +26,10 @@ typedef enum IOFuncSelector
IOFunc_send
} IOFuncSelector;
/* Hook for plugins to get control in get_attavgwidth() */
typedef int32 (*get_attavgwidth_hook_type) (Oid relid, AttrNumber attnum);
extern PGDLLIMPORT get_attavgwidth_hook_type get_attavgwidth_hook;
extern bool op_in_opfamily(Oid opno, Oid opfamily);
extern int get_op_opfamily_strategy(Oid opno, Oid opfamily);
extern void get_op_opfamily_properties(Oid opno, Oid opfamily,