expression: fix type infer of unaryMinus which should return ETDecimal if ETInt overflow int (#11989)

[sre-bot]

cherry-pick #11989 to release-3.0

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Signed-off-by: Lonng heng@lonng.org

What problem does this PR solve?

The typeInfer of unaryMinus function should return types.ETDecimal if the inferred type is types.ETInt and the value will overflow the int bound.

mysql> create table f (a decimal(65, 0));
Query OK, 0 rows affected (0.02 sec)

mysql> insert into f value (-17000000000000000000);
ERROR 1264 (22003): Out of range value for column 'a' at row 1

What is changed and how it works?

Relax restrictions of the unaryMinus.typeInfer which should alway handle int overflow instead of just in SELECT statement.

Check List

Tests

• Unit test
• Integration test

Related changes

• Need to update the tidb-ansible repository

Release note

• Fix type infers of unaryMinus which should return ETDecimal if the ETInt overflow int bound.

[sre-bot]

/run-all-tests

[crazycs520]

LGTM

[winkyao]

LGTM