Create table with column length is too big : Mysql is converting VARBINARY to BLOB and VARCHAR to TEXT , Tidb is resulting error.

[ramanich1]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

SET sql_mode = ‘NO_ENGINE_SUBSTITUTION’;
drop table if exists t1;
CREATE TABLE t1( a varbinary(70000), b varchar(70000000));
desc t1;

2. What did you expect to see? (Required)

mysql> CREATE TABLE t1( a varbinary(70000), b varchar(70000000));
Query OK, 0 rows affected, 2 warnings (0.01 sec)

mysql> desc t1;
+-------+------------+------+-----+---------+-------+
| Field | Type       | Null | Key | Default | Extra |
+-------+------------+------+-----+---------+-------+
| a     | mediumblob | YES  |     | NULL    |       |
| b     | longtext   | YES  |     | NULL    |       |
+-------+------------+------+-----+---------+-------+
2 rows in set (0.00 sec)

3. What did you see instead (Required)

mysql> CREATE TABLE t1( a varbinary(70000), b varchar(70000000));
ERROR 1074 (42000): Column length too big for column 'a' (max = 65535); use BLOB or TEXT instead

4. What is your TiDB version? (Required)

| Release Version: v5.4.0-alpha-264-g6efa36df6
Edition: Community
Git Commit Hash: 6efa36df6cff325106f67ecfe3d79816ba37ca6a
Git Branch: master
UTC Build Time: 2021-11-29 16:57:51
GoVersion: go1.17.2
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false |

[djshow832]

/assign unconsolable

[ti-chi-bot]

@djshow832: GitHub didn't allow me to assign the following users: unconsolable.

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In response to this:

/assign unconsolable

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