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Per-column collation support

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This adds collation support for columns and domains, a COLLATE clause
to override it per expression, and B-tree index support.

Peter Eisentraut
reviewed by Pavel Stehule, Itagaki Takahiro, Robert Haas, Noah Misch
This commit is contained in:
Peter Eisentraut
2011-02-08 23:04:18 +02:00
parent 1703f0e8da
commit 414c5a2ea6
156 changed files with 4519 additions and 582 deletions
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18
src/include/fmgr.h
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@@ -50,6 +50,7 @@ typedef struct FmgrInfo
bool fn_strict; /* function is "strict" (NULL in => NULL out) */
bool fn_retset; /* function returns a set */
unsigned char fn_stats; /* collect stats if track_functions > this */
Oid fn_collation; /* collation to use */
void *fn_extra; /* extra space for use by handler */
MemoryContext fn_mcxt; /* memory context to store fn_extra in */
fmNodePtr fn_expr; /* expression parse tree for call, or NULL */
@@ -83,6 +84,16 @@ extern void fmgr_info(Oid functionId, FmgrInfo *finfo);
extern void fmgr_info_cxt(Oid functionId, FmgrInfo *finfo,
MemoryContext mcxt);
/*
* Initialize the fn_collation field
*/
extern void fmgr_info_collation(Oid collationId, FmgrInfo *finfo);
/*
* Initialize the fn_expr field and set the collation based on it
*/
extern void fmgr_info_expr(fmNodePtr expr, FmgrInfo *finfo);
/*
* Copy an FmgrInfo struct
*/
@@ -296,6 +307,7 @@ extern struct varlena *pg_detoast_datum_packed(struct varlena * datum);
#define PG_RETURN_VARCHAR_P(x) PG_RETURN_POINTER(x)
#define PG_RETURN_HEAPTUPLEHEADER(x) PG_RETURN_POINTER(x)
#define PG_GET_COLLATION() (fcinfo->flinfo ? fcinfo->flinfo->fn_collation : InvalidOid)
/*-------------------------------------------------------------------------
* Support for detecting call convention of dynamically-loaded functions
@@ -438,6 +450,12 @@ extern Datum DirectFunctionCall9(PGFunction func, Datum arg1, Datum arg2,
Datum arg6, Datum arg7, Datum arg8,
Datum arg9);
/* the same but passing a collation */
extern Datum DirectFunctionCall1WithCollation(PGFunction func, Oid collation,
Datum arg1);
extern Datum DirectFunctionCall2WithCollation(PGFunction func, Oid collation,
Datum arg1, Datum arg2);
/* These are for invocation of a previously-looked-up function with a
* directly-computed parameter list. Note that neither arguments nor result
* are allowed to be NULL.