Unexpected Error Overflow

[bajinsheng]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

CREATE TABLE t0(c0 TEXT(300));
INSERT t0(c0) VALUES(-2E300);

SELECT t0.c0 FROM t0 WHERE CAST(- t0.c0 AS DECIMAL); -- ERROR 1105 (HY000): [components/tidb_query_datatype/src/codec/mysql/decimal.rs:1893]: parsing 2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 will overflow

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

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

| Release Version: v7.4.0-alpha
Edition: Community
Git Commit Hash: 32540a4a77984744dc0309d9287b05c8e9593252
Git Branch: heads/refs/tags/v7.4.0-alpha
UTC Build Time: 2023-09-27 14:33:24
GoVersion: go1.21.1
Race Enabled: false
Check Table Before Drop: false
Store: tikv |

[bajinsheng]

/label fuzz/sqlancer