Mysql: Function 'Lower' treats string literals as column names

[TobiasPfeifer]

As shown at https://www.w3schools.com/sql/trymysql.asp?filename=trysql_func_mysql_lower the Lower function should not treat string literals as column names.

currently select(Lower("LOWER")) from customers limit(1) fails with java.sql.SQLSyntaxErrorException: Unknown column 'LOWER' in 'field list' when executed against the test schema.

1. It should yield lower (SELECT lower("LOWER") instead of SELECT lower(LOWER))
2. It should type check the columns used in Lower are available in the table

I encountered this when cleaning up the tests in #427
There is a test case available for this issue: https://github.com/zio/zio-sql/pull/427/files#diff-b69ce48bd3431d7cb54603c42a17ece5658336b82acfb54a29098672c96ee04fR26

[naderghanbari]

I'd like to tackle this if no one else is working on it.

[naderghanbari]

This actually applies not only to mysql but to all dialects.

[sviezypan]

This is still an open issue