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MDEV-10717 Assertion `!null_value' failed in virtual bool Item::send(Protocol*, String*)

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The problem was that null_value was not set to "false" on a well-formed row.
If an ill-formed row was followed by a well-forned row, null_value remained
"true" in the call of Item::send() for the well-formed row.
This commit is contained in:
Alexander Barkov
2016-12-05 16:50:12 +04:00
parent 18cdff6765
commit 46dee0d184
3 changed files with 41 additions and 0 deletions
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26
mysql-test/r/ctype_utf8.result
View File

@ -5869,5 +5869,31 @@ SELECT length(data) AS len FROM (SELECT REPEAT('ä', 65537) AS data) AS sub;
len
131074
#
# MDEV-10717 Assertion `!null_value' failed in virtual bool Item::send(Protocol*, String*)
#
CREATE TABLE t1 (i INT, KEY(i));
INSERT INTO t1 VALUES (20081205),(20050327);
SELECT HEX(i), HEX(CHAR(i USING utf8)) FROM t1;
HEX(i) HEX(CHAR(i USING utf8))
131F197 0131
1326A35 01326A35
Warnings:
Warning 1300 Invalid utf8 character string: 'F197'
SET sql_mode='STRICT_ALL_TABLES';
SELECT HEX(i), HEX(CHAR(i USING utf8)) FROM t1;
HEX(i) HEX(CHAR(i USING utf8))
131F197 NULL
1326A35 01326A35
Warnings:
Warning 1300 Invalid utf8 character string: 'F197'
SELECT CHAR(i USING utf8) FROM t1;
CHAR(i USING utf8)
###
###
Warnings:
### 1300 Invalid utf8 character string: 'F197'
SET sql_mode=DEFAULT;
DROP TABLE t1;
#
# End of 5.5 tests
#

14
mysql-test/t/ctype_utf8.test
View File

@ -1681,6 +1681,20 @@ SELECT length(data) AS len FROM (SELECT REPEAT('ä', 65535) AS data) AS sub;
SELECT length(data) AS len FROM (SELECT REPEAT('ä', 65536) AS data) AS sub;
SELECT length(data) AS len FROM (SELECT REPEAT('ä', 65537) AS data) AS sub;
--echo #
--echo # MDEV-10717 Assertion `!null_value' failed in virtual bool Item::send(Protocol*, String*)
--echo #
CREATE TABLE t1 (i INT, KEY(i));
INSERT INTO t1 VALUES (20081205),(20050327);
SELECT HEX(i), HEX(CHAR(i USING utf8)) FROM t1;
SET sql_mode='STRICT_ALL_TABLES';
SELECT HEX(i), HEX(CHAR(i USING utf8)) FROM t1;
# Avoid garbage in the output
--replace_column 1 ###
SELECT CHAR(i USING utf8) FROM t1;
SET sql_mode=DEFAULT;
DROP TABLE t1;
--echo #
--echo # End of 5.5 tests
--echo #

1
sql/item.cc
View File

@ -5743,6 +5743,7 @@ String *Item::check_well_formed_result(String *str, bool send_error)
uint wlen= cs->cset->well_formed_len(cs,
str->ptr(), str->ptr() + str->length(),
str->length(), &well_formed_error);
null_value= false;
if (wlen < str->length())
{
THD *thd= current_thd;