database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-12 21:01:52 +03:00
Code Activity

First phase of OUT-parameters project. We can now define and use SQL

Browse Source 
functions with OUT parameters.  The various PLs still need work, as does
pg_dump.  Rudimentary docs and regression tests included.
This commit is contained in:
Tom Lane
2005-03-31 22:46:33 +00:00
parent fb13881f42
commit 47888fe842
23 changed files with 1500 additions and 529 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
src/include/funcapi.h
View File

@ -9,7 +9,7 @@
*
* Copyright (c) 2002-2005, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/include/funcapi.h,v 1.15 2005/01/01 05:43:08 momjian Exp $
* $PostgreSQL: pgsql/src/include/funcapi.h,v 1.16 2005/03/31 22:46:24 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -124,7 +124,57 @@ typedef struct FuncCallContext
} FuncCallContext;
/*----------
* Support to ease writing Functions returning composite types
* Support to ease writing functions returning composite types
*
* External declarations:
* get_call_result_type:
* Given a function's call info record, determine the kind of datatype
* it is supposed to return. If resultTypeId isn't NULL, *resultTypeId
* receives the actual datatype OID (this is mainly useful for scalar
* result types). If resultTupleDesc isn't NULL, *resultTupleDesc
* receives a pointer to a TupleDesc when the result is of a composite
* type, or NULL when it's a scalar result or the rowtype could not be
* determined. NB: the tupledesc should be copied if it is to be
* accessed over a long period.
* get_expr_result_type:
* Given an expression node, return the same info as for
* get_call_result_type. Note: the cases in which rowtypes cannot be
* determined are different from the cases for get_call_result_type.
* get_func_result_type:
* Given only a function's OID, return the same info as for
* get_call_result_type. Note: the cases in which rowtypes cannot be
* determined are different from the cases for get_call_result_type.
* Do *not* use this if you can use one of the others.
*----------
*/
/* Type categories for get_call_result_type and siblings */
typedef enum TypeFuncClass
{
TYPEFUNC_SCALAR, /* scalar result type */
TYPEFUNC_COMPOSITE, /* determinable rowtype result */
TYPEFUNC_RECORD, /* indeterminate rowtype result */
TYPEFUNC_OTHER /* bogus type, eg pseudotype */
} TypeFuncClass;
extern TypeFuncClass get_call_result_type(FunctionCallInfo fcinfo,
Oid *resultTypeId,
TupleDesc *resultTupleDesc);
extern TypeFuncClass get_expr_result_type(Node *expr,
Oid *resultTypeId,
TupleDesc *resultTupleDesc);
extern TypeFuncClass get_func_result_type(Oid functionId,
Oid *resultTypeId,
TupleDesc *resultTupleDesc);
extern TupleDesc build_function_result_tupdesc_d(Datum proallargtypes,
Datum proargmodes,
Datum proargnames);
extern TupleDesc build_function_result_tupdesc_t(HeapTuple procTuple);
/*----------
* Support to ease writing functions returning composite types
*
* External declarations:
* TupleDesc RelationNameGetTupleDesc(const char *relname) - Use to get a
@ -160,7 +210,6 @@ typedef struct FuncCallContext
/* obsolete version of above */
#define TupleGetDatum(_slot, _tuple) PointerGetDatum((_tuple)->t_data)
/* from tupdesc.c */
extern TupleDesc RelationNameGetTupleDesc(const char *relname);
extern TupleDesc TypeGetTupleDesc(Oid typeoid, List *colaliases);