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Fix problem with whole-row Vars referencing sub-select outputs, per

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example from Jim Dew.  Add some simple regression tests, since this is
an area we seem to break regularly :-(
This commit is contained in:
Tom Lane 2005-12-14 16:28:32 +00:00
parent f82e2baef6
commit 426292663a
3 changed files with 29 additions and 2 deletions
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4
src/backend/executor/execQual.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/execQual.c,v 1.185 2005/11/22 18:17:10 momjian Exp $
* $PostgreSQL: pgsql/src/backend/executor/execQual.c,v 1.186 2005/12/14 16:28:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -523,7 +523,7 @@ ExecEvalWholeRowVar(ExprState *exprstate, ExprContext *econtext,
Assert(variable->varno != OUTER);
slot = econtext->ecxt_scantuple;
tuple = slot->tts_tuple;
tuple = ExecFetchSlotTuple(slot);
tupleDesc = slot->tts_tupleDescriptor;
/*

21
src/test/regress/expected/select.out
View File

@ -431,3 +431,24 @@ SELECT p.name, p.age FROM person* p ORDER BY age using >, name;
mary | 8
(58 rows)
--
-- Test some cases involving whole-row Var referencing a subquery
--
select foo from (select 1) as foo;
foo
-----
(1)
(1 row)
select foo from (select null) as foo;
foo
-----
()
(1 row)
select foo from (select 'xyzzy',1,null) as foo;
foo
------------
(xyzzy,1,)
(1 row)

6
src/test/regress/sql/select.sql
View File

@ -104,3 +104,9 @@ SELECT p.name, p.age FROM person* p;
--
SELECT p.name, p.age FROM person* p ORDER BY age using >, name;
--
-- Test some cases involving whole-row Var referencing a subquery
--
select foo from (select 1) as foo;
select foo from (select null) as foo;
select foo from (select 'xyzzy',1,null) as foo;