Is your feature request related to a problem? Please describe.
Superglue Calcite Parser uses SqlDdlParserImpl Parser Factory to create calcite Config. It sets Conformance to SqlConformanceEnum.BABEL but it is not sufficient . Many of the date/time syntaxes are fixed in SqlBabelParserImpl but not available in SqlDdlParserImpl.
Describe the solution you'd like
Change the Superglue Calcite Parser to Use SqlBabelParserImpl as Parser Factory instead of SqlDdlParserImpl while creating calcite config
SQl statements like - select date('1990-01-01') from t , select date(x) from t should succeed on parsing