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MDEV-16038 Assertion `map->n_bits > 0' failed (my_bitmap.c:386: bitmap_is_clear_all)

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Rows with no elements are not allowed in a table value constructor
unless it is used in an INSERT statement.
This commit is contained in:
Igor Babaev 2018-04-26 16:38:56 -07:00
parent 99fa7c6c2f
commit 6c5e60f1b1
4 changed files with 22 additions and 2 deletions
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7
mysql-test/main/table_value_constr.result
View file

@ -2072,7 +2072,7 @@ select * from (values (1), (t1.b), (2)) as new_tvc;
ERROR HY000: Field reference 't1.b' can't be used in table value constructor
drop table t1;
#
# MDEV-MDEV-15940: cursor over TVC
# MDEV-15940: cursor over TVC
#
BEGIN NOT ATOMIC
DECLARE v INT;
@ -2092,3 +2092,8 @@ END;
|
v
1
#
# MDEV-16038: empty row in TVC
#
with t as (values (),()) select 1 from t;
ERROR HY000: Row with no elements is not allowed in table value constructor in this context

9
mysql-test/main/table_value_constr.test
View file

@ -1046,7 +1046,7 @@ select * from (values (1), (t1.b), (2)) as new_tvc;
drop table t1;
--echo #
--echo # MDEV-MDEV-15940: cursor over TVC
--echo # MDEV-15940: cursor over TVC
--echo #
DELIMITER |;
@ -1068,3 +1068,10 @@ END;
|
DELIMITER ;|
--echo #
--echo # MDEV-16038: empty row in TVC
--echo #
--error ER_EMPTY_ROW_IN_TVC
with t as (values (),()) select 1 from t;

2
sql/share/errmsg-utf8.txt
View file

@ -7913,3 +7913,5 @@ ER_INDEX_FILE_FULL
eng "The index file for table '%-.192s' is full"
ER_UPDATED_COLUMN_ONLY_ONCE
eng "The column %`s.%`s cannot be changed more than once in a single UPDATE statement"
ER_EMPTY_ROW_IN_TVC
eng "Row with no elements is not allowed in table value constructor in this context"

6
sql/sql_tvc.cc
View file

@ -221,6 +221,12 @@ bool table_value_constr::prepare(THD *thd, SELECT_LEX *sl,
uint cnt= first_elem->elements;
Type_holder *holders;
if (cnt == 0)
{
my_error(ER_EMPTY_ROW_IN_TVC, MYF(0));
DBUG_RETURN(true);
}
if (fix_fields_for_tvc(thd, li))
DBUG_RETURN(true);