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MDEV-14929 - AddressSanitizer: memcpy-param-overlap in Field_longstr::compress

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Handle overlaping "from" and Field_blob_compressed::value for compressed
blobs similarily to regular blobs.
This commit is contained in:
Sergey Vojtovich 2018-03-21 13:54:15 +04:00
commit 443b9a418c
3 changed files with 35 additions and 5 deletions
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12
mysql-test/main/column_compression.test
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@ -79,3 +79,15 @@ INSERT INTO t1 VALUES(REPEAT('a', 255));
SET column_compression_threshold=DEFAULT;
SELECT a, LENGTH(a) FROM t1;
DROP TABLE t1;
--echo #
--echo # MDEV-14929 - AddressSanitizer: memcpy-param-overlap in
--echo # Field_longstr::compress
--echo #
CREATE TABLE t1(b BLOB COMPRESSED);
INSERT INTO t1 VALUES('foo'),('bar');
SET SESSION optimizer_switch = 'derived_merge=off';
SELECT * FROM ( SELECT * FROM t1 ) AS sq ORDER BY b;
SET SESSION optimizer_switch=DEFAULT;
DROP TABLE t1;