Examples with HazelcastSqlValidator com.hazelcast.jet.sql.impl.validate.HazelcastSqlValidator used on opensource projects

Example 11 with HazelcastSqlValidator

use of com.hazelcast.jet.sql.impl.validate.HazelcastSqlValidator in project hazelcast by hazelcast.

the class HazelcastCoalesceFunction method checkOperandTypes.

@Override
protected boolean checkOperandTypes(HazelcastCallBinding callBinding, boolean throwOnFailure) {
    HazelcastSqlValidator validator = callBinding.getValidator();
    SqlValidatorScope scope = callBinding.getScope();
    SqlBasicCall sqlCall = (SqlBasicCall) callBinding.getCall();
    List<SqlNode> operandList = sqlCall.getOperandList();
    List<RelDataType> argTypes = new ArrayList<>(operandList.size());
    for (SqlNode node : operandList) {
        argTypes.add(validator.deriveType(scope, node));
    }
    assert !argTypes.isEmpty();
    RelDataType returnType = argTypes.stream().reduce(HazelcastTypeUtils::withHigherPrecedence).get();
    for (int i = 0; i < operandList.size(); i++) {
        int finalI = i;
        boolean elementTypeCoerced = validator.getTypeCoercion().rowTypeElementCoercion(scope, operandList.get(i), returnType, sqlNode -> sqlCall.getOperands()[finalI] = sqlNode);
        if (!elementTypeCoerced) {
            if (throwOnFailure) {
                throw validator.newValidationError(sqlCall, RESOURCES.cannotInferCaseResult(argTypes.toString(), getName()));
            } else {
                return false;
            }
        }
    }
    return true;
}