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First phase of SCHEMA changes, concentrating on fixing the grammar and

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the parsetree representation.  As yet we don't *do* anything with schema
names, just drop 'em on the floor; but you can enter schema-compatible
command syntax, and there's even a primitive CREATE SCHEMA command.
No doc updates yet, except to note that you can now extract a field
from a function-returning-row's result with (foo(...)).fieldname.
This commit is contained in:
Tom Lane
2002-03-21 16:02:16 +00:00
parent 8c9c8ca2b5
commit 95ef6a3448
52 changed files with 2039 additions and 1535 deletions
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86
src/backend/rewrite/rewriteDefine.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteDefine.c,v 1.63 2001/08/12 21:35:18 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteDefine.c,v 1.64 2002/03/21 16:01:16 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -110,63 +110,17 @@ InsertRule(char *rulname,
return rewriteObjectId;
}
/*
* for now, event_object must be a single attribute
*/
static void
ValidateRule(int event_type,
char *eobj_string,
char *eslot_string,
Node *event_qual,
List **action,
int is_instead,
Oid event_attype)
{
if (((event_type == CMD_INSERT) || (event_type == CMD_DELETE)) &&
eslot_string)
{
elog(ERROR,
"rules not allowed for insert or delete events to an attribute");
}
#ifdef NOT_USED
/*---------
* on retrieve to class.attribute do instead nothing is converted to
* 'on retrieve to class.attribute do instead:
*
* retrieve (attribute = NULL)'
*
* this is also a terrible hack that works well -- glass
*---------
*/
if (is_instead && !*action && eslot_string && event_type == CMD_SELECT)
{
char *temp_buffer = (char *) palloc(strlen(template) + 80);
sprintf(temp_buffer, template, event_attype,
get_typlen(event_attype), eslot_string,
event_attype);
*action = (List *) stringToNode(temp_buffer);
pfree(temp_buffer);
}
#endif
}
void
DefineQueryRewrite(RuleStmt *stmt)
{
CmdType event_type = stmt->event;
Attr *event_obj = stmt->object;
RangeVar *event_obj = stmt->relation;
Node *event_qual = stmt->whereClause;
CmdType event_type = stmt->event;
bool is_instead = stmt->instead;
List *action = stmt->actions;
Relation event_relation;
Oid ev_relid;
Oid ruleId;
char *eslot_string = NULL;
int event_attno;
Oid event_attype;
char *actionP,
@ -186,23 +140,6 @@ DefineQueryRewrite(RuleStmt *stmt)
event_relation = heap_openr(event_obj->relname, AccessExclusiveLock);
ev_relid = RelationGetRelid(event_relation);
/*
* The current rewrite handler is known to work on relation level
* rules only. And for SELECT events, it expects one non-nothing
* action that is instead and returns exactly a tuple of the rewritten
* relation. This restricts SELECT rules to views.
*
* Jan
*/
if (event_obj->attrs)
elog(ERROR, "attribute level rules currently not supported");
/*
* eslot_string = strVal(lfirst(event_obj->attrs));
*/
else
eslot_string = NULL;
/*
* No rule actions that modify OLD or NEW
*/
@ -358,21 +295,8 @@ DefineQueryRewrite(RuleStmt *stmt)
/*
* This rule is allowed - prepare to install it.
*/
if (eslot_string == NULL)
{
event_attno = -1;
event_attype = InvalidOid;
}
else
{
event_attno = attnameAttNum(event_relation, eslot_string);
event_attype = attnumTypeId(event_relation, event_attno);
}
/* fix bug about instead nothing */
ValidateRule(event_type, event_obj->relname,
eslot_string, event_qual, &action,
is_instead, event_attype);
event_attno = -1;
event_attype = InvalidOid;
/*
* We want the rule's table references to be checked as though by the