Artem Osipov

I can implement [regexp_substr()](https://pgpedia.info/r/regexp_substr.html) can I just create a pull request or do I need to be added to some access list?

We can add double quotes for Expr:Column during plan optimization

The default logic to convert expr to field name is here https://github.com/apache/datafusion/blob/main/datafusion/expr/src/logical_plan/plan.rs#L2185-L2195 So we have some options 1. Update display format here https://github.com/apache/datafusion/blob/main/datafusion/expr/src/expr.rs#L2671 2. Change default ScalarUDFImpl schema_name method ```rust...

The reason of the issue that we doesn't support table faction as relation. https://github.com/apache/datafusion/blob/main/datafusion/sql/src/relation/mod.rs#L157 Both TableFunction and Function ```sql create table test (jsontext text); insert into table test (jsontext) values('{"key":...

https://docs.snowflake.com/en/sql-reference/sql/show-databases ```Parameters TERSE Optionally returns output containing only the following columns: created_on name kind database_name schema_name Note that kind, database_name, and schema_name always display NULL because the columns are not...

[https://docs.snowflake.com/en/sql-reference/sql/show-tables](https://docs.snowflake.com/en/sql-reference/sql/show-tables) ``` [ IN ... ] Optionally specifies the scope of the command. Specify one of the following: ``` Seems we should support only one IN clause