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Commitc20fb65

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committed
On further experimentation, there were still a couple of bugs in
ExpandIndirectionStar() ... and in markTargetListOrigin() too.
1 parentdfc5c72 commitc20fb65

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1 file changed

+44
-43
lines changed

1 file changed

+44
-43
lines changed

‎src/backend/parser/parse_target.c‎

Lines changed: 44 additions & 43 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/parser/parse_target.c,v 1.132 2005/04/2521:03:25 tgl Exp $
11+
* $PostgreSQL: pgsql/src/backend/parser/parse_target.c,v 1.133 2005/04/2522:02:30 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -204,8 +204,9 @@ markTargetListOrigin(ParseState *pstate, TargetEntry *tle,
204204
tle->resorigcol=attnum;
205205
break;
206206
caseRTE_SUBQUERY:
207+
/* Subselect-in-FROM: copy up from the subselect */
208+
if (attnum!=InvalidAttrNumber)
207209
{
208-
/* Subselect-in-FROM: copy up from the subselect */
209210
TargetEntry*ste=get_tle_by_resno(rte->subquery->targetList,
210211
attnum);
211212

@@ -217,8 +218,9 @@ markTargetListOrigin(ParseState *pstate, TargetEntry *tle,
217218
}
218219
break;
219220
caseRTE_JOIN:
221+
/* Join RTE --- recursively inspect the alias variable */
222+
if (attnum!=InvalidAttrNumber)
220223
{
221-
/* Join RTE --- recursively inspect the alias variable */
222224
Var*aliasvar;
223225

224226
Assert(attnum>0&&attnum <=list_length(rte->joinaliasvars));
@@ -920,17 +922,47 @@ expandRecordVariable(ParseState *pstate, Var *var, int levelsup)
920922
rte=GetRTEByRangeTablePosn(pstate,var->varno,netlevelsup);
921923
attnum=var->varattno;
922924

925+
if (attnum==InvalidAttrNumber)
926+
{
927+
/* Whole-row reference to an RTE, so expand the known fields */
928+
List*names,
929+
*vars;
930+
ListCell*lname,
931+
*lvar;
932+
inti;
933+
934+
expandRTE(GetLevelNRangeTable(pstate,netlevelsup),
935+
var->varno,0, false,&names,&vars);
936+
937+
tupleDesc=CreateTemplateTupleDesc(list_length(vars), false);
938+
i=1;
939+
forboth(lname,names,lvar,vars)
940+
{
941+
char*label=strVal(lfirst(lname));
942+
Node*varnode= (Node*)lfirst(lvar);
943+
944+
TupleDescInitEntry(tupleDesc,i,
945+
label,
946+
exprType(varnode),
947+
exprTypmod(varnode),
948+
0);
949+
i++;
950+
}
951+
Assert(lname==NULL&&lvar==NULL);/* lists same length? */
952+
953+
returntupleDesc;
954+
}
955+
923956
expr= (Node*)var;/* default if we can't drill down */
924957

925958
switch (rte->rtekind)
926959
{
927960
caseRTE_RELATION:
928961
caseRTE_SPECIAL:
929962
/*
930-
* This case should not occur: a whole-row Var should have the
931-
* table's named rowtype, and a column of a table shouldn't have
932-
* type RECORD either. Fall through and fail (most likely)
933-
* at the bottom.
963+
* This case should not occur: a column of a table shouldn't have
964+
* type RECORD. Fall through and fail (most likely) at the
965+
* bottom.
934966
*/
935967
break;
936968
caseRTE_SUBQUERY:
@@ -963,49 +995,18 @@ expandRecordVariable(ParseState *pstate, Var *var, int levelsup)
963995
}
964996
break;
965997
caseRTE_JOIN:
966-
/* Join RTE */
967-
if (attnum==InvalidAttrNumber)
968-
{
969-
/* Whole-row reference to join, so expand the fields */
970-
List*names,
971-
*vars;
972-
ListCell*lname,
973-
*lvar;
974-
inti;
975-
976-
expandRTE(GetLevelNRangeTable(pstate,netlevelsup),
977-
var->varno,0, false,&names,&vars);
978-
979-
tupleDesc=CreateTemplateTupleDesc(list_length(vars), false);
980-
i=1;
981-
forboth(lname,names,lvar,vars)
982-
{
983-
char*label=strVal(lfirst(lname));
984-
Node*varnode= (Node*)lfirst(lvar);
985-
986-
TupleDescInitEntry(tupleDesc,i,
987-
label,
988-
exprType(varnode),
989-
exprTypmod(varnode),
990-
0);
991-
i++;
992-
}
993-
Assert(lname==NULL&&lvar==NULL);/* lists same len? */
994-
returntupleDesc;
995-
}
996-
/* Else recursively inspect the alias variable */
998+
/* Join RTE --- recursively inspect the alias variable */
997999
Assert(attnum>0&&attnum <=list_length(rte->joinaliasvars));
9981000
expr= (Node*)list_nth(rte->joinaliasvars,attnum-1);
9991001
if (IsA(expr,Var))
10001002
returnexpandRecordVariable(pstate, (Var*)expr,netlevelsup);
10011003
/* else fall through to inspect the expression */
10021004
break;
10031005
caseRTE_FUNCTION:
1004-
expr=rte->funcexpr;
1005-
/* The func expr probably can't be a Var, but check */
1006-
if (IsA(expr,Var))
1007-
returnexpandRecordVariable(pstate, (Var*)expr,netlevelsup);
1008-
/* else fall through to inspect the expression */
1006+
/*
1007+
* We couldn't get here unless a function is declared with one
1008+
* of its result columns as RECORD, which is not allowed.
1009+
*/
10091010
break;
10101011
}
10111012

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