types: fix bad error message for numeric conversion issue#32744

[fanrenhoo]

Signed-off-by: fanrenhoo fanrenhoo@sina.com

What problem does this PR solve?

Issue Number: close #32744

Problem Summary: Tidb give incorrect warning message for string to decimal conversion, not compatible with MySQL

What is changed and how it works?

Change the warning message from "Bad Number" to "Truncated incorrect DECIMAL...."

Check List

Tests

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

DROP TABLE IF EXISTS t0;
CREATE TABLE t0 (c0 DECIMAL);
INSERT INTO t0 VALUES (1);
SELECT * FROM t0 WHERE t0.c0 > 'a';
SHOW WARNINGS

+---------+------+----------------------------------------+
| Level | Code | Message |
+---------+------+----------------------------------------+
| Warning | 1292 | Truncated incorrect DECIMAL value: 'a' |
+---------+------+----------------------------------------+
1 row in set (0.00 sec)

• No code

Side effects
No

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

Documentation
No

• 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.

Make tidb give correct warning message as MySQL does for string to decimal conversion cases, fix issue #32744

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• hawkingrei
• xhebox

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[fanrenhoo]

/cc @xhebox

[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/d4e7716c4fd050f1623b5a1b1689f23755b0c1e7

[fanrenhoo]

Hi, what's next for this one?

[fanrenhoo]

@hawkingrei Hi, how about this one? THKS

[hawkingrei]

/merge

[ti-chi-bot]

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

Commit hash: a5b1446

[ti-chi-bot]

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