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Diffstat (limited to 'src/test/regress/sql')
| -rw-r--r-- | src/test/regress/sql/subselect.sql | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/test/regress/sql/subselect.sql b/src/test/regress/sql/subselect.sql index 56707e26bbf..4be2e40a000 100644 --- a/src/test/regress/sql/subselect.sql +++ b/src/test/regress/sql/subselect.sql @@ -93,6 +93,19 @@ select q1, float8(count(*)) / (select count(*) from int8_tbl) from int8_tbl group by q1 order by q1; -- +-- Check EXISTS simplification with LIMIT +-- +explain (costs off) +select * from int4_tbl o where exists + (select 1 from int4_tbl i where i.f1=o.f1 limit null); +explain (costs off) +select * from int4_tbl o where not exists + (select 1 from int4_tbl i where i.f1=o.f1 limit 1); +explain (costs off) +select * from int4_tbl o where exists + (select 1 from int4_tbl i where i.f1=o.f1 limit 0); + +-- -- Test cases to catch unpleasant interactions between IN-join processing -- and subquery pullup. -- |