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DROP ... IF EXISTS for the following cases:

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language, tablespace, trigger, rule, opclass, function, aggregate. operator, and cast.
This commit is contained in:
Andrew Dunstan
2006-06-16 20:23:45 +00:00
parent e79cc2db00
commit bbcd01692b
15 changed files with 271 additions and 58 deletions
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99
src/backend/parser/gram.y
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@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.545 2006/05/27 17:38:45 tgl Exp $
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.546 2006/06/16 20:23:44 adunstan Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -191,7 +191,7 @@ static void doNegateFloat(Value *v);
%type <ival> opt_lock lock_type cast_context
%type <boolean> opt_force opt_or_replace
opt_grant_grant_option opt_grant_admin_option
opt_nowait
opt_nowait opt_if_exists
%type <boolean> like_including_defaults
@@ -2401,6 +2401,15 @@ DropPLangStmt:
DropPLangStmt *n = makeNode(DropPLangStmt);
n->plname = $4;
n->behavior = $5;
n->missing_ok = false;
$$ = (Node *)n;
}
| DROP opt_procedural LANGUAGE IF_P EXISTS ColId_or_Sconst opt_drop_behavior
{
DropPLangStmt *n = makeNode(DropPLangStmt);
n->plname = $6;
n->behavior = $7;
n->missing_ok = true;
$$ = (Node *)n;
}
;
@@ -2445,6 +2454,14 @@ DropTableSpaceStmt: DROP TABLESPACE name
{
DropTableSpaceStmt *n = makeNode(DropTableSpaceStmt);
n->tablespacename = $3;
n->missing_ok = false;
$$ = (Node *) n;
}
| DROP TABLESPACE IF_P EXISTS name
{
DropTableSpaceStmt *n = makeNode(DropTableSpaceStmt);
n->tablespacename = $5;
n->missing_ok = true;
$$ = (Node *) n;
}
;
@@ -2630,6 +2647,17 @@ DropTrigStmt:
n->property = $3;
n->behavior = $6;
n->removeType = OBJECT_TRIGGER;
n->missing_ok = false;
$$ = (Node *) n;
}
| DROP TRIGGER IF_P EXISTS name ON qualified_name opt_drop_behavior
{
DropPropertyStmt *n = makeNode(DropPropertyStmt);
n->relation = $7;
n->property = $5;
n->behavior = $8;
n->removeType = OBJECT_TRIGGER;
n->missing_ok = true;
$$ = (Node *) n;
}
;
@@ -2903,6 +2931,16 @@ DropOpClassStmt:
n->opclassname = $4;
n->amname = $6;
n->behavior = $7;
n->missing_ok = false;
$$ = (Node *) n;
}
| DROP OPERATOR CLASS IF_P EXISTS any_name USING access_method opt_drop_behavior
{
RemoveOpClassStmt *n = makeNode(RemoveOpClassStmt);
n->opclassname = $6;
n->amname = $8;
n->behavior = $9;
n->missing_ok = true;
$$ = (Node *) n;
}
;
@@ -3912,6 +3950,17 @@ RemoveFuncStmt:
n->name = $3;
n->args = extractArgTypes($4);
n->behavior = $5;
n->missing_ok = false;
$$ = (Node *)n;
}
| DROP FUNCTION IF_P EXISTS func_name func_args opt_drop_behavior
{
RemoveFuncStmt *n = makeNode(RemoveFuncStmt);
n->kind = OBJECT_FUNCTION;
n->name = $5;
n->args = extractArgTypes($6);
n->behavior = $7;
n->missing_ok = true;
$$ = (Node *)n;
}
;
@@ -3924,6 +3973,17 @@ RemoveAggrStmt:
n->name = $3;
n->args = $4;
n->behavior = $5;
n->missing_ok = false;
$$ = (Node *)n;
}
| DROP AGGREGATE IF_P EXISTS func_name aggr_args opt_drop_behavior
{
RemoveFuncStmt *n = makeNode(RemoveFuncStmt);
n->kind = OBJECT_AGGREGATE;
n->name = $5;
n->args = $6;
n->behavior = $7;
n->missing_ok = true;
$$ = (Node *)n;
}
;
@@ -3936,6 +3996,17 @@ RemoveOperStmt:
n->name = $3;
n->args = $5;
n->behavior = $7;
n->missing_ok = false;
$$ = (Node *)n;
}
| DROP OPERATOR IF_P EXISTS any_operator '(' oper_argtypes ')' opt_drop_behavior
{
RemoveFuncStmt *n = makeNode(RemoveFuncStmt);
n->kind = OBJECT_OPERATOR;
n->name = $5;
n->args = $7;
n->behavior = $9;
n->missing_ok = true;
$$ = (Node *)n;
}
;
@@ -3998,16 +4069,21 @@ cast_context: AS IMPLICIT_P { $$ = COERCION_IMPLICIT; }
;
DropCastStmt: DROP CAST '(' Typename AS Typename ')' opt_drop_behavior
DropCastStmt: DROP CAST opt_if_exists '(' Typename AS Typename ')' opt_drop_behavior
{
DropCastStmt *n = makeNode(DropCastStmt);
n->sourcetype = $4;
n->targettype = $6;
n->behavior = $8;
n->sourcetype = $5;
n->targettype = $7;
n->behavior = $9;
n->missing_ok =
$$ = (Node *)n;
}
;
opt_if_exists: IF_P EXISTS { $$ = true; }
| /* empty */ { $$ = false; }
;
/*****************************************************************************
@@ -4432,6 +4508,17 @@ DropRuleStmt:
n->property = $3;
n->behavior = $6;
n->removeType = OBJECT_RULE;
n->missing_ok = false;
$$ = (Node *) n;
}
| DROP RULE IF_P EXISTS name ON qualified_name opt_drop_behavior
{
DropPropertyStmt *n = makeNode(DropPropertyStmt);
n->relation = $7;
n->property = $5;
n->behavior = $8;
n->removeType = OBJECT_RULE;
n->missing_ok = true;
$$ = (Node *) n;
}
;