infoschema: refine error code for package infoschema

[Deardrops]

What problem does this PR solve?

Not all the errors in infoschema package have error code.

Make some errors related to CREATE USER / ALTER USER / DROP USER statement compatibly with MySQL 5.7, e.g.

mysql> warnings;
Show warnings enabled.

mysql> create user if not exists 'newuser'@'localhost';
Query OK, 0 rows affected (0.00 sec)

mysql> create user if not exists 'newuser'@'localhost';
Query OK, 0 rows affected, 1 warning (0.00 sec)

Note (Code 3163): User 'newuser'@'localhost' already exists.
mysql> create user 'newuser'@'localhost';
ERROR 1396 (HY000): Operation CREATE USER failed for 'newuser'@'localhost'

What is changed and how it works?

Add them, related PR pingcap/parser#644

Check List

Tests

• Integration test

Code changes

• Has exported variable/fields change

Side effects

• None

Related changes

• None

Release note

• None

[sre-bot]

Thanks for your PR.
This PR will be closed by bot because you already had 3 opened PRs, close or merge them before submitting a new one.
#12550 , #13168 , #13637

[sre-bot]

Thanks for your PR.
This PR will be closed by bot because you already had 3 opened PRs, close or merge them before submitting a new one.
#13486 , #13637 , #13654

[Deardrops]

/run-common-test tidb-test=pr/954

[Deardrops]

/run-integration-common-test tidb-test=pr/954

[codecov]

Codecov Report

Merging #13646 into master will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master     #13646   +/-   ##
===========================================
  Coverage   80.1239%   80.1239%           
===========================================
  Files           473        473           
  Lines        116512     116512           
===========================================
  Hits          93354      93354           
  Misses        15819      15819           
  Partials       7339       7339

[bb7133]

LGTM

[Deardrops]

/run-all-tests tidb-test=pr/954

[sre-bot]

@bb7133, PTAL.

[jackysp]

LGTM

[sre-bot]

/run-all-tests

[sre-bot]

@Deardrops merge failed.

[jackysp]

@Deardrops merge failed, PTAL

[Deardrops]

/run-all-tests tidb-test=pr/954

[Deardrops]

/run-unit-test