Examples with CAST com.facebook.presto.spi.function.OperatorType.CAST used on opensource projects

Example 1 with CAST

use of com.facebook.presto.spi.function.OperatorType.CAST in project presto by prestodb.

the class DecimalCasts method castFunctionFromDecimalTo.

private static SqlScalarFunction castFunctionFromDecimalTo(TypeSignature to, String... methodNames) {
    Signature signature = Signature.builder().kind(SCALAR).operatorType(CAST).argumentTypes(parseTypeSignature("decimal(precision,scale)", ImmutableSet.of("precision", "scale"))).returnType(to).build();
    return SqlScalarFunction.builder(DecimalCasts.class).signature(signature).implementation(b -> b.methods(methodNames).withExtraParameters((context) -> {
        long precision = context.getLiteral("precision");
        long scale = context.getLiteral("scale");
        Number tenToScale;
        if (isShortDecimal(context.getParameterTypes().get(0))) {
            tenToScale = longTenToNth(intScale(scale));
        } else {
            tenToScale = bigIntegerTenToNth(intScale(scale));
        }
        return ImmutableList.of(precision, scale, tenToScale);
    })).build();
}