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MDEV-20495 Assertion `precision > 0' failed in decimal_bin_size upon CREATE .. SELECT with zerofilled decimal

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Also fixes:

MDEV-20560 Assertion `precision > 0' failed in decimal_bin_size upon SELECT with MOD short unsigned decimal

Changing the way how Item_func_mod calculates its max_length.
It now uses decimal_precision(), decimal_scale() and unsigned_flag
of its arguments, like all other Item_num_op descendants do.
This commit is contained in:
Alexander Barkov
2019-09-24 10:46:18 +04:00
parent fd3ad41eed
commit 67b0faa29e
11 changed files with 222 additions and 7 deletions
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38
mysql-test/t/func_math.test
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@ -576,6 +576,44 @@ INSERT INTO t1 VALUES (1),(2);
SELECT STDDEV_SAMP(ROUND('0', 309)) FROM t1;
DROP TABLE t1;
--echo #
--echo # MDEV-20495 Assertion `precision > 0' failed in decimal_bin_size upon CREATE .. SELECT with zerofilled decimal
--echo #
--echo # Testing that dyadic arithmetic operations are symmetric
--echo # for (+1) and (-1) and produce the same length in CONCAT(),
--echo # because (+1) and (-1) have the same data type: signed int.
CREATE TABLE t1 AS SELECT
CONCAT(+1%2.0),
CONCAT(-1%2.0),
CONCAT(+1/2.0),
CONCAT(-1/2.0),
CONCAT(+1*2.0),
CONCAT(-1*2.0),
CONCAT(+1+2.0),
CONCAT(-1+2.0),
CONCAT(+1-2.0),
CONCAT(-1-2.0);
SHOW CREATE TABLE t1;
DROP TABLE t1;
CREATE TABLE t1 AS SELECT
CONCAT(+1%2),
CONCAT(-1%2),
CONCAT(+1/2),
CONCAT(-1/2),
CONCAT(+1*2),
CONCAT(-1*2),
CONCAT(+1+2),
CONCAT(-1+2),
CONCAT(+1-2),
CONCAT(-1-2);
SHOW CREATE TABLE t1;
DROP TABLE t1;
--echo #
--echo # End of 5.5 tests
--echo #