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Support SET FROM CURRENT in CREATE/ALTER FUNCTION, ALTER DATABASE, ALTER ROLE.

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(Actually, it works as a plain statement too, but I didn't document that
because it seems a bit useless.)  Unify VariableResetStmt with
VariableSetStmt, and clean up some ancient cruft in the representation of
same.
This commit is contained in:
Tom Lane
2007-09-03 18:46:30 +00:00
parent dd4594e332
commit e7889b83b7
17 changed files with 382 additions and 360 deletions
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80
src/backend/tcop/utility.c
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/tcop/utility.c,v 1.285 2007/08/21 01:11:17 tgl Exp $
* $PostgreSQL: pgsql/src/backend/tcop/utility.c,v 1.286 2007/09/03 18:46:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1041,48 +1041,7 @@ ProcessUtility(Node *parsetree,
break;
case T_VariableSetStmt:
{
VariableSetStmt *n = (VariableSetStmt *) parsetree;
/*
* Special cases for special SQL syntax that effectively sets
* more than one variable per statement.
*/
if (strcmp(n->name, "TRANSACTION") == 0)
{
ListCell *head;
foreach(head, n->args)
{
DefElem *item = (DefElem *) lfirst(head);
if (strcmp(item->defname, "transaction_isolation") == 0)
SetPGVariable("transaction_isolation",
list_make1(item->arg), n->is_local);
else if (strcmp(item->defname, "transaction_read_only") == 0)
SetPGVariable("transaction_read_only",
list_make1(item->arg), n->is_local);
}
}
else if (strcmp(n->name, "SESSION CHARACTERISTICS") == 0)
{
ListCell *head;
foreach(head, n->args)
{
DefElem *item = (DefElem *) lfirst(head);
if (strcmp(item->defname, "transaction_isolation") == 0)
SetPGVariable("default_transaction_isolation",
list_make1(item->arg), n->is_local);
else if (strcmp(item->defname, "transaction_read_only") == 0)
SetPGVariable("default_transaction_read_only",
list_make1(item->arg), n->is_local);
}
}
else
SetPGVariable(n->name, n->args, n->is_local);
}
ExecSetVariableStmt((VariableSetStmt *) parsetree);
break;
case T_VariableShowStmt:
@ -1093,14 +1052,6 @@ ProcessUtility(Node *parsetree,
}
break;
case T_VariableResetStmt:
{
VariableResetStmt *n = (VariableResetStmt *) parsetree;
ResetPGVariable(n->name, isTopLevel);
}
break;
case T_DiscardStmt:
DiscardCommand((DiscardStmt *) parsetree, isTopLevel);
break;
@ -1924,19 +1875,30 @@ CreateCommandTag(Node *parsetree)
break;
case T_VariableSetStmt:
tag = "SET";
switch (((VariableSetStmt *) parsetree)->kind)
{
case VAR_SET_VALUE:
case VAR_SET_CURRENT:
case VAR_SET_DEFAULT:
case VAR_SET_MULTI:
tag = "SET";
break;
case VAR_RESET:
case VAR_RESET_ALL:
tag = "RESET";
break;
default:
tag = "???";
}
break;
case T_VariableShowStmt:
tag = "SHOW";
break;
case T_VariableResetStmt:
tag = "RESET";
break;
case T_DiscardStmt:
switch (((DiscardStmt *) parsetree)->target) {
switch (((DiscardStmt *) parsetree)->target)
{
case DISCARD_ALL:
tag = "DISCARD ALL";
break;
@ -2402,10 +2364,6 @@ GetCommandLogLevel(Node *parsetree)
lev = LOGSTMT_ALL;
break;
case T_VariableResetStmt:
lev = LOGSTMT_ALL;
break;
case T_CreateTrigStmt:
lev = LOGSTMT_DDL;
break;