Examples with SUBTRACT com.facebook.presto.common.function.OperatorType.SUBTRACT used on opensource projects

Example 1 with SUBTRACT

use of com.facebook.presto.common.function.OperatorType.SUBTRACT in project presto by prestodb.

the class DecimalOperators method decimalSubtractOperator.

private static SqlScalarFunction decimalSubtractOperator() {
    TypeSignature decimalLeftSignature = parseTypeSignature("decimal(a_precision, a_scale)", ImmutableSet.of("a_precision", "a_scale"));
    TypeSignature decimalRightSignature = parseTypeSignature("decimal(b_precision, b_scale)", ImmutableSet.of("b_precision", "b_scale"));
    TypeSignature decimalResultSignature = parseTypeSignature("decimal(r_precision, r_scale)", ImmutableSet.of("r_precision", "r_scale"));
    Signature signature = SignatureBuilder.builder().kind(SCALAR).operatorType(SUBTRACT).longVariableConstraints(longVariableExpression("r_precision", "min(38, max(a_precision - a_scale, b_precision - b_scale) + max(a_scale, b_scale) + 1)"), longVariableExpression("r_scale", "max(a_scale, b_scale)")).argumentTypes(decimalLeftSignature, decimalRightSignature).returnType(decimalResultSignature).build();
    return SqlScalarFunction.builder(DecimalOperators.class, SUBTRACT).signature(signature).deterministic(true).choice(choice -> choice.implementation(methodsGroup -> methodsGroup.methods("subtractShortShortShort").withExtraParameters(DecimalOperators::calculateShortRescaleParameters)).implementation(methodsGroup -> methodsGroup.methods("subtractShortShortLong", "subtractLongLongLong", "subtractShortLongLong", "subtractLongShortLong").withExtraParameters(DecimalOperators::calculateLongRescaleParameters))).build();
}