jonahgao opened a new pull request, #10242:
URL: https://github.com/apache/datafusion/pull/10242
## Which issue does this PR close?
Closes #10240.
## Rationale for this change
- `substring('xxxx', 1, 2)` is recognized as `special` in the new version of
sqlparser-rs. Refer to https://github.com/sqlparser-rs/sqlparser-rs/pull/1173.
- The from .. for format is not supported because it may contain regular
expressions, such as `substring('Thomas' from ‘…$’)`; our current
implementation of substring is merely an alias for `substr`.
## What changes are included in this PR?
Re-enable the substring function.
## Are these changes tested?
Yes
## Are there any user-facing changes?
No
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