public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
SqlCallBinding callBinding = (SqlCallBinding) opBinding;
ExplicitOperatorBinding newOpBinding =
new ExplicitOperatorBinding(
opBinding,
collectOperandTypes(
callBinding.getValidator(), callBinding.getScope(), callBinding.getCall()));
return SqlTypeStrategies.rtiNullableBoolean.inferReturnType(newOpBinding);
}
public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
SqlCallBinding callBinding = (SqlCallBinding) opBinding;
return callBinding.getValidator().getNamespace(callBinding.getCall()).getRowType();
}