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Add CREATE OR REPLACE FUNCTION syntax to allow replacing a function

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definition without changing the function's OID, thereby not breaking
rules, views, triggers, etc that depend on it.  From Gavin Sherry.
This commit is contained in:
Tom Lane
2001-10-02 21:39:36 +00:00
parent f24fe14162
commit f2c657375d
12 changed files with 130 additions and 68 deletions
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38
src/backend/parser/gram.y
View File

@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.255 2001/10/01 04:19:18 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.256 2001/10/02 21:39:35 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -151,7 +151,7 @@ static void doNegateFloat(Value *v);
%type <list> createdb_opt_list, createdb_opt_item
%type <ival> opt_lock, lock_type
%type <boolean> opt_force
%type <boolean> opt_force, opt_or_replace
%type <list> user_list
@@ -321,13 +321,13 @@ static void doNegateFloat(Value *v);
VALUES, VARCHAR, VARYING, VIEW,
WHEN, WHERE, WITH, WORK, YEAR_P, ZONE
/* Keywords (in SQL3 reserved words) */
/* Keywords (in SQL99 reserved words) */
%token CHAIN, CHARACTERISTICS,
DEFERRABLE, DEFERRED,
IMMEDIATE, INITIALLY, INOUT,
OFF, OUT,
PATH_P, PENDANT,
RESTRICT,
REPLACE, RESTRICT,
TRIGGER,
WITHOUT
@@ -2497,33 +2497,32 @@ RecipeStmt: EXECUTE RECIPE recipe_name
/*****************************************************************************
*
* QUERY:
* define function <fname>
* create [or replace] function <fname>
* [(<type-1> { , <type-n>})]
* returns <type-r>
* as <filename or code in language as appropriate>
* language <lang> [with
* [ arch_pct = <percentage | pre-defined>]
* [, disk_pct = <percentage | pre-defined>]
* [, byte_pct = <percentage | pre-defined>]
* [, perbyte_cpu = <int | pre-defined>]
* [, percall_cpu = <int | pre-defined>]
* [, iscachable] ]
* language <lang> [with parameters]
*
*****************************************************************************/
ProcedureStmt: CREATE FUNCTION func_name func_args
ProcedureStmt: CREATE opt_or_replace FUNCTION func_name func_args
RETURNS func_return AS func_as LANGUAGE ColId_or_Sconst opt_with
{
ProcedureStmt *n = makeNode(ProcedureStmt);
n->funcname = $3;
n->argTypes = $4;
n->returnType = (Node *)$6;
n->withClause = $11;
n->as = $8;
n->language = $10;
n->replace = $2;
n->funcname = $4;
n->argTypes = $5;
n->returnType = (Node *) $7;
n->withClause = $12;
n->as = $9;
n->language = $11;
$$ = (Node *)n;
};
opt_or_replace: OR REPLACE { $$ = TRUE; }
| /*EMPTY*/ { $$ = FALSE; }
;
opt_with: WITH definition { $$ = $2; }
| /*EMPTY*/ { $$ = NIL; }
;
@@ -5682,6 +5681,7 @@ TokenId: ABSOLUTE { $$ = "absolute"; }
| REINDEX { $$ = "reindex"; }
| RELATIVE { $$ = "relative"; }
| RENAME { $$ = "rename"; }
| REPLACE { $$ = "replace"; }
| RESTRICT { $$ = "restrict"; }
| RETURNS { $$ = "returns"; }
| REVOKE { $$ = "revoke"; }

3
src/backend/parser/keywords.c
View File

@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.97 2001/08/26 16:56:00 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.98 2001/10/02 21:39:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -216,6 +216,7 @@ static ScanKeyword ScanKeywords[] = {
{"reindex", REINDEX},
{"relative", RELATIVE},
{"rename", RENAME},
{"replace", REPLACE},
{"reset", RESET},
{"restrict", RESTRICT},
{"returns", RETURNS},