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First cut at full support for OUTER JOINs. There are still a few loose

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ends to clean up (see my message of same date to pghackers), but mostly
it works.  INITDB REQUIRED!
This commit is contained in:
Tom Lane
2000-09-12 21:07:18 +00:00
parent b5c0ab278b
commit ed5003c584
93 changed files with 6386 additions and 4262 deletions
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53
src/backend/parser/parse_node.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_node.c,v 1.45 2000/08/24 03:29:05 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_node.c,v 1.46 2000/09/12 21:07:02 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -49,8 +49,8 @@ make_parsestate(ParseState *parentParseState)
pstate = palloc(sizeof(ParseState));
MemSet(pstate, 0, sizeof(ParseState));
pstate->p_last_resno = 1;
pstate->parentParseState = parentParseState;
pstate->p_last_resno = 1;
return pstate;
}
@ -164,35 +164,44 @@ make_op(char *opname, Node *ltree, Node *rtree)
/*
* make_var
* Build a Var node for an attribute identified by name
* Build a Var node for an attribute identified by RTE and attrno
*/
Var *
make_var(ParseState *pstate, Oid relid, char *refname,
char *attrname)
make_var(ParseState *pstate, RangeTblEntry *rte, int attrno)
{
HeapTuple tp;
Form_pg_attribute att_tup;
int vnum,
attid;
sublevels_up;
Oid vartypeid;
int32 type_mod;
int sublevels_up;
vnum = refnameRangeTablePosn(pstate, refname, &sublevels_up);
vnum = RTERangeTablePosn(pstate, rte, &sublevels_up);
tp = SearchSysCacheTuple(ATTNAME,
ObjectIdGetDatum(relid),
PointerGetDatum(attrname),
0, 0);
if (!HeapTupleIsValid(tp))
elog(ERROR, "Relation %s does not have attribute %s",
refname, attrname);
att_tup = (Form_pg_attribute) GETSTRUCT(tp);
attid = att_tup->attnum;
vartypeid = att_tup->atttypid;
type_mod = att_tup->atttypmod;
if (rte->relid != InvalidOid)
{
/* Plain relation RTE --- get the attribute's type info */
HeapTuple tp;
Form_pg_attribute att_tup;
return makeVar(vnum, attid, vartypeid, type_mod, sublevels_up);
tp = SearchSysCacheTuple(ATTNUM,
ObjectIdGetDatum(rte->relid),
Int16GetDatum(attrno),
0, 0);
/* this shouldn't happen... */
if (!HeapTupleIsValid(tp))
elog(ERROR, "Relation %s does not have attribute %d",
rte->relname, attrno);
att_tup = (Form_pg_attribute) GETSTRUCT(tp);
vartypeid = att_tup->atttypid;
type_mod = att_tup->atttypmod;
}
else
{
/* Subselect RTE --- get type info from subselect's tlist */
elog(ERROR, "make_var: subselect in FROM not implemented yet");
vartypeid = type_mod = 0;
}
return makeVar(vnum, attrno, vartypeid, type_mod, sublevels_up);
}
/*