Hi, I have a plain sql string and using Planner i convert it to RelNode just fine. then i am trying to generate sql string from builder using: new RelToSqlConverter(dialect).visitChild(0, relNode).asQuery.toSqlString(dialect).getSql and got exception.
It fails with: java.lang.UnsupportedOperationException: class org.apache.calcite.sql.SqlSyntax$6: SPECIAL. After debugging i found that i have a problem with following expression: EXTRACT(EPOCH FROM timestamp). Any ideas how to fix it? I am considering to add timestamp to operand type checker.
