diff options
| -rw-r--r-- | mysql-test/r/default.result | 15 | ||||
| -rw-r--r-- | mysql-test/t/default.test | 19 | ||||
| -rw-r--r-- | sql/item.cc | 7 |
3 files changed, 41 insertions, 0 deletions
diff --git a/mysql-test/r/default.result b/mysql-test/r/default.result index e65e015eff9..5b0d82407a2 100644 --- a/mysql-test/r/default.result +++ b/mysql-test/r/default.result @@ -205,4 +205,19 @@ Warnings: Warning 1364 Field 'id' doesn't have a default value drop view v1; drop table t1; +create table t1 (a int unique); +create table t2 (b int default 10); +insert into t1 (a) values (1); +insert into t2 (b) values (1); +insert into t1 (a) select b from t2 on duplicate key update a=default; +select * from t1; +a +NULL +insert into t1 (a) values (1); +insert into t1 (a) select b from t2 on duplicate key update a=default(b); +select * from t1; +a +NULL +10 +drop table t1, t2; End of 5.0 tests. diff --git a/mysql-test/t/default.test b/mysql-test/t/default.test index 14aa4b02cfe..b719cb83448 100644 --- a/mysql-test/t/default.test +++ b/mysql-test/t/default.test @@ -145,5 +145,24 @@ insert into t1 values(default); drop view v1; drop table t1; +# +# Bug #39002: crash with +# INSERT ... SELECT ... ON DUPLICATE KEY UPDATE col=DEFAULT +# + +create table t1 (a int unique); +create table t2 (b int default 10); +insert into t1 (a) values (1); +insert into t2 (b) values (1); + +insert into t1 (a) select b from t2 on duplicate key update a=default; +select * from t1; + +insert into t1 (a) values (1); +insert into t1 (a) select b from t2 on duplicate key update a=default(b); +select * from t1; + +drop table t1, t2; + --echo End of 5.0 tests. diff --git a/sql/item.cc b/sql/item.cc index 3f41c7211c8..119097ea942 100644 --- a/sql/item.cc +++ b/sql/item.cc @@ -6210,6 +6210,13 @@ Item *Item_default_value::transform(Item_transformer transformer, uchar *args) { DBUG_ASSERT(!current_thd->is_stmt_prepare()); + /* + If the value of arg is NULL, then this object represents a constant, + so further transformation is unnecessary (and impossible). + */ + if (!arg) + return 0; + Item *new_item= arg->transform(transformer, args); if (!new_item) return 0; |