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Diffstat (limited to 'mysql-test/t/subselect4.test')
| -rw-r--r-- | mysql-test/t/subselect4.test | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/mysql-test/t/subselect4.test b/mysql-test/t/subselect4.test index b7a9c95abe7..21ec28b1c03 100644 --- a/mysql-test/t/subselect4.test +++ b/mysql-test/t/subselect4.test @@ -2112,3 +2112,29 @@ INSERT INTO t2 VALUES ('k'),('rid'),('f'),('x'); EXPLAIN EXTENDED SELECT * FROM t1 where ( t1.l1 < ANY (SELECT MAX(t2.v1) FROM t2)); SELECT * FROM t1 where ( t1.l1 < ANY (SELECT MAX(t2.v1) FROM t2)); DROP TABLE t1, t2; + +--echo # +--echo # MDEV-19232: Floating point precision / value comparison problem +--echo # + +CREATE TABLE t1 (region varchar(60), area decimal(10,0), population decimal(11,0)); +INSERT INTO t1 VALUES ('Central America and the Caribbean',91,11797); +INSERT INTO t1 VALUES ('Central America and the Caribbean',442,66422); + +SET @save_optimizer_switch=@@optimizer_switch; +SET optimizer_switch='subquery_cache=on'; + +SELECT +population, area, population/area, +cast(population/area as DECIMAL(20,9)) FROM t1 LIMIT 1; + +SELECT * FROM t1 A +WHERE population/area = (SELECT MAX(population/area) from t1 B where A.region = B.region); + +SET optimizer_switch='subquery_cache=off'; +SELECT * FROM t1 A +WHERE population/area = (SELECT MAX(population/area) from t1 B where A.region = B.region); + +SET @@optimizer_switch= @save_optimizer_switch; + +DROP TABLE t1; |