diff options
Diffstat (limited to 'src/include/utils/selfuncs.h')
| -rw-r--r-- | src/include/utils/selfuncs.h | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/src/include/utils/selfuncs.h b/src/include/utils/selfuncs.h index df28d738433..ad484d8b492 100644 --- a/src/include/utils/selfuncs.h +++ b/src/include/utils/selfuncs.h @@ -8,7 +8,7 @@ * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/utils/selfuncs.h,v 1.29 2006/04/26 18:28:34 momjian Exp $ + * $PostgreSQL: pgsql/src/include/utils/selfuncs.h,v 1.30 2006/04/26 22:33:36 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -16,6 +16,7 @@ #define SELFUNCS_H #include "fmgr.h" +#include "access/htup.h" #include "nodes/relation.h" @@ -62,6 +63,26 @@ } while (0) +/* Return data from examine_variable and friends */ +typedef struct +{ + Node *var; /* the Var or expression tree */ + RelOptInfo *rel; /* Relation, or NULL if not identifiable */ + HeapTuple statsTuple; /* pg_statistic tuple, or NULL if none */ + /* NB: if statsTuple!=NULL, it must be freed when caller is done */ + Oid vartype; /* exposed type of expression */ + Oid atttype; /* type to pass to get_attstatsslot */ + int32 atttypmod; /* typmod to pass to get_attstatsslot */ + bool isunique; /* true if matched to a unique index */ +} VariableStatData; + +#define ReleaseVariableStats(vardata) \ + do { \ + if (HeapTupleIsValid((vardata).statsTuple)) \ + ReleaseSysCache((vardata).statsTuple); \ + } while(0) + + typedef enum { Pattern_Type_Like, Pattern_Type_Like_IC, @@ -133,7 +154,8 @@ extern Selectivity estimate_hash_bucketsize(PlannerInfo *root, Node *hashkey, extern Datum btcostestimate(PG_FUNCTION_ARGS); extern Datum hashcostestimate(PG_FUNCTION_ARGS); extern Datum gistcostestimate(PG_FUNCTION_ARGS); - -extern Datum parentsel(PG_FUNCTION_ARGS); +extern bool get_restriction_variable(PlannerInfo *root, List *args, int varRelid, + VariableStatData *vardata, Node **other, + bool *varonleft); #endif /* SELFUNCS_H */ |