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MDEV-21608 Assertion `n_ext == dtuple_get_n_ext(dtuple)' failed during updation of PK

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- n_ext value may be less than dtuple_get_n_ext(dtuple) when PK is being
updated and new record inherits the externally stored fields from
delete mark old record.
This commit is contained in:
Thirunarayanan Balathandayuthapani 2020-02-07 16:01:31 +05:30
parent ebbc572b82
commit 3be751d5b9
3 changed files with 18 additions and 1 deletions
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6
mysql-test/suite/innodb/r/innodb-blob.result
View file

@ -153,3 +153,9 @@ a
SELECT * FROM t2;
a
DROP TABLE t1,t2,t3;
CREATE TABLE t1(f1 INT PRIMARY KEY, f2 TEXT)ENGINE=InnoDB
ROW_FORMAT=REDUNDANT;
SET @fill_amount = (@@innodb_page_size / 2 ) + 1 ;
INSERT INTO t1 VALUES(1, REPEAT(2, @fill_amount));
UPDATE t1 SET f1 = 2;
DROP TABLE t1;

7
mysql-test/suite/innodb/t/innodb-blob.test
View file

@ -206,3 +206,10 @@ SELECT a FROM t3;
SELECT * FROM t2;
DROP TABLE t1,t2,t3;
CREATE TABLE t1(f1 INT PRIMARY KEY, f2 TEXT)ENGINE=InnoDB
ROW_FORMAT=REDUNDANT;
SET @fill_amount = (@@innodb_page_size / 2 ) + 1 ;
INSERT INTO t1 VALUES(1, REPEAT(2, @fill_amount));
UPDATE t1 SET f1 = 2;
DROP TABLE t1;

6
storage/innobase/include/rem0rec.ic
View file

@ -1626,7 +1626,11 @@ rec_get_converted_size(
data_size = dtuple_get_data_size(dtuple, 0);
ut_ad(n_ext == dtuple_get_n_ext(dtuple));
/* If primary key is being updated then the new record inherits
externally stored fields from the delete-marked old record.
In that case, n_ext may be less value than
dtuple_get_n_ext(tuple). */
ut_ad(n_ext <= dtuple_get_n_ext(dtuple));
extra_size = rec_get_converted_extra_size(
data_size, dtuple_get_n_fields(dtuple), n_ext);