diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/utils/cache/lsyscache.c | 17 | ||||
| -rw-r--r-- | src/include/utils/lsyscache.h | 8 |
2 files changed, 23 insertions, 2 deletions
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c index 63dde8f9cb9..891abf422bc 100644 --- a/src/backend/utils/cache/lsyscache.c +++ b/src/backend/utils/cache/lsyscache.c @@ -7,7 +7,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/cache/lsyscache.c,v 1.168 2010/02/26 02:01:11 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/utils/cache/lsyscache.c,v 1.169 2010/04/23 22:23:39 sriggs Exp $ * * NOTES * Eventually, the index information should go through here, too. @@ -38,6 +38,9 @@ /* Hook for plugins to get control in get_attavgwidth() */ get_attavgwidth_hook_type get_attavgwidth_hook = NULL; +/* Hook for plugins to get control in get_func_cost and get_func_rows */ +get_func_cost_hook_type get_func_cost_hook = NULL; +get_func_rows_hook_type get_func_rows_hook = NULL; /* ---------- AMOP CACHES ---------- */ @@ -1409,6 +1412,12 @@ get_func_cost(Oid funcid) HeapTuple tp; float4 result; + if (get_func_cost_hook) + { + result = (*get_func_cost_hook) (funcid); + if (result > (float4) 0) + return result; + } tp = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcid)); if (!HeapTupleIsValid(tp)) elog(ERROR, "cache lookup failed for function %u", funcid); @@ -1428,6 +1437,12 @@ get_func_rows(Oid funcid) HeapTuple tp; float4 result; + if (get_func_rows_hook) + { + result = (*get_func_rows_hook) (funcid); + if (result > (float4) 0) + return result; + } tp = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcid)); if (!HeapTupleIsValid(tp)) elog(ERROR, "cache lookup failed for function %u", funcid); diff --git a/src/include/utils/lsyscache.h b/src/include/utils/lsyscache.h index 429bcaa1477..e25a4d9475a 100644 --- a/src/include/utils/lsyscache.h +++ b/src/include/utils/lsyscache.h @@ -6,7 +6,7 @@ * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/utils/lsyscache.h,v 1.131 2010/01/04 02:44:40 tgl Exp $ + * $PostgreSQL: pgsql/src/include/utils/lsyscache.h,v 1.132 2010/04/23 22:23:39 sriggs Exp $ * *------------------------------------------------------------------------- */ @@ -30,6 +30,12 @@ typedef enum IOFuncSelector typedef int32 (*get_attavgwidth_hook_type) (Oid relid, AttrNumber attnum); extern PGDLLIMPORT get_attavgwidth_hook_type get_attavgwidth_hook; +/* Hook for plugins to get control in get_func_cost and get_func_rows */ +typedef float4 (*get_func_cost_hook_type) (Oid funcid); +extern PGDLLIMPORT get_func_cost_hook_type get_func_cost_hook; +typedef float4 (*get_func_rows_hook_type) (Oid funcid); +extern PGDLLIMPORT get_func_rows_hook_type get_func_rows_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, |