parser: polish the error message for generated column with default value

[tiancaiamao]

What problem does this PR solve?

Issue Number: close #22535

Problem Summary:

What is changed and how it works?

After the change, the error code and message is the same with MySQL.

Before:

mysql>  create table t1 (a int, b int as (a + 1) default 10);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your TiDB version for the right syntax to use line 1 column 52 near ")"Invalid column definition

After:

mysql> create table t1 (a int, b int as (a + 1) default 10);
ERROR 1221 (HY000): Incorrect usage of DEFAULT and generated column

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

mysql> create table t1 (a int, b int as (a + 1) default 10);
ERROR 1221 (HY000): Incorrect usage of DEFAULT and generated column
mysql> create table t1 (a int, b int as (a + 1) on update now());
ERROR 1221 (HY000): Incorrect usage of ON UPDATE and generated column
mysql> create table t1 (a int, b int as (a + 1) auto_increment);
ERROR 1221 (HY000): Incorrect usage of AUTO_INCREMENT and generated column

• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lance6716
• mjonss

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[mjonss]

LGTM

[mjonss]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: ecbf910

[hawkingrei]

/test all