hi, all: there is a operate + of strings in q84.sql of TPC-DS. To run this case, program throws exeception as follows:org.apache.calcite.sql.validate.SqlValidatorException: Cannot apply '+' to arguments of type '<VARCHAR(2)> + <CHAR(2)>'. Supported form(s): '<NUMERIC> + <NUMERIC>''<DATETIME_INTERVAL> + <DATETIME_INTERVAL>''<DATETIME> + <DATETIME_INTERVAL>''<DATETIME_INTERVAL> + <DATETIME>'.is calcite can support this operate(+) apply on strings?
- calcite should support plus operate of strings 张赵中
