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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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33
src/backend/commands/functioncmds.c
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@@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/functioncmds.c,v 1.84 2007/09/03 00:39:15 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/functioncmds.c,v 1.85 2007/09/03 18:46:29 tgl Exp $
*
* DESCRIPTION
* These routines take the parse tree and pick out the
@@ -354,7 +354,7 @@ interpret_func_volatility(DefElem *defel)
}
/*
* Update a proconfig value according to a list of SET and RESET items.
* Update a proconfig value according to a list of VariableSetStmt items.
*
* The input and result may be NULL to signify a null entry.
*/
@@ -365,33 +365,20 @@ update_proconfig_value(ArrayType *a, List *set_items)
foreach(l, set_items)
{
Node *sitem = (Node *) lfirst(l);
VariableSetStmt *sstmt = (VariableSetStmt *) lfirst(l);
if (IsA(sitem, VariableSetStmt))
Assert(IsA(sstmt, VariableSetStmt));
if (sstmt->kind == VAR_RESET_ALL)
a = NULL;
else
{
VariableSetStmt *sstmt = (VariableSetStmt *) sitem;
char *valuestr = ExtractSetVariableArgs(sstmt);
if (sstmt->args)
{
char *valuestr;
valuestr = flatten_set_variable_args(sstmt->name, sstmt->args);
if (valuestr)
a = GUCArrayAdd(a, sstmt->name, valuestr);
}
else /* SET TO DEFAULT */
else /* RESET */
a = GUCArrayDelete(a, sstmt->name);
}
else if (IsA(sitem, VariableResetStmt))
{
VariableResetStmt *rstmt = (VariableResetStmt *) sitem;
if (strcmp(rstmt->name, "all") == 0)
a = NULL; /* RESET ALL */
else
a = GUCArrayDelete(a, rstmt->name);
}
else
elog(ERROR, "unexpected node type: %d", nodeTag(sitem));
}
return a;