*: ODBC-styled datetime literal cannot be used in the expressions.

[bb7133]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

create table t(a datetime);
select * from t where a > {ts '2021-05-05 00:00:00.111'};

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

The query runs successfully.

3. What did you see instead (Required)

tidb> select * from t where a > {ts '2021-05-05 00:00:00.111'};
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 29 near "ts '00:00:00.111'}" 

4. What is your TiDB version? (Required)

The error can be reproduced in all existing versions of TiDB.

[bb7133]

The root cause is that, the ODBC-styled literal can used as Field/SelectField only, see:

• https://github.com/pingcap/parser/blob/af39ecc734c1f416d5fccf0eed9730df85c78278/parser.y#L5284
• https://github.com/pingcap/parser/blob/af39ecc734c1f416d5fccf0eed9730df85c78278/parser.y#L6802

[ti-srebot]

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