public static Signature comparisonExpressionSignature(
ComparisonExpression.Type expressionType, Type leftType, Type rightType) {
for (OperatorType operatorType : OperatorType.values()) {
if (operatorType.name().equals(expressionType.name())) {
return internalOperator(
expressionType.name(),
parseTypeSignature(StandardTypes.BOOLEAN),
leftType.getTypeSignature(),
rightType.getTypeSignature());
}
}
return internalFunction(
expressionType.name(),
parseTypeSignature(StandardTypes.BOOLEAN),
leftType.getTypeSignature(),
rightType.getTypeSignature());
}
@Override
protected Type visitArithmeticBinary(ArithmeticBinaryExpression node, AnalysisContext context) {
return getOperator(
context,
node,
OperatorType.valueOf(node.getType().name()),
node.getLeft(),
node.getRight());
}
@Override
protected Type visitComparisonExpression(ComparisonExpression node, AnalysisContext context) {
OperatorType operatorType;
if (node.getType() == ComparisonExpression.Type.IS_DISTINCT_FROM) {
operatorType = OperatorType.EQUAL;
} else {
operatorType = OperatorType.valueOf(node.getType().name());
}
return getOperator(context, node, operatorType, node.getLeft(), node.getRight());
}