Examples with BoundVariables io.prestosql.metadata.BoundVariables used on opensource projects

Example 1 with BoundVariables

use of io.prestosql.metadata.BoundVariables in project hetu-core by openlookeng.

the class JsonToRowCast method specialize.

@Override
public BuiltInScalarFunctionImplementation specialize(BoundVariables boundVariables, int arity, FunctionAndTypeManager functionAndTypeManager) {
    checkArgument(arity == 1, "Expected arity to be 1");
    RowType rowType = (RowType) boundVariables.getTypeVariable("T");
    checkCondition(canCastFromJson(rowType), INVALID_CAST_ARGUMENT, "Cannot cast JSON to %s", rowType);
    List<Field> rowFields = rowType.getFields();
    BlockBuilderAppender[] fieldAppenders = rowFields.stream().map(rowField -> createBlockBuilderAppender(rowField.getType())).toArray(BlockBuilderAppender[]::new);
    MethodHandle methodHandle = METHOD_HANDLE.bindTo(rowType).bindTo(fieldAppenders).bindTo(getFieldNameToIndex(rowFields));
    return new BuiltInScalarFunctionImplementation(true, ImmutableList.of(valueTypeArgumentProperty(RETURN_NULL_ON_NULL)), methodHandle);
}

Example 2 with BoundVariables

use of io.prestosql.metadata.BoundVariables in project hetu-core by openlookeng.

the class AbstractGreatestLeast method specialize.

@Override
public BuiltInScalarFunctionImplementation specialize(BoundVariables boundVariables, int arity, FunctionAndTypeManager functionAndTypeManager) {
    Type type = boundVariables.getTypeVariable("E");
    checkArgument(type.isOrderable(), "Type must be orderable");
    MethodHandle compareMethod = functionAndTypeManager.getBuiltInScalarFunctionImplementation(functionAndTypeManager.resolveOperatorFunctionHandle(operatorType, TypeSignatureProvider.fromTypes(type, type))).getMethodHandle();
    List<Class<?>> javaTypes = IntStream.range(0, arity).mapToObj(i -> type.getJavaType()).collect(toImmutableList());
    Class<?> clazz = generate(javaTypes, type, compareMethod);
    MethodHandle methodHandle = methodHandle(clazz, getSignature().getNameSuffix(), javaTypes.toArray(new Class<?>[javaTypes.size()]));
    return new BuiltInScalarFunctionImplementation(false, nCopies(javaTypes.size(), valueTypeArgumentProperty(RETURN_NULL_ON_NULL)), methodHandle);
}

Example 3 with BoundVariables

use of io.prestosql.metadata.BoundVariables in project hetu-core by openlookeng.

the class FormatFunction method specialize.

@Override
public BuiltInScalarFunctionImplementation specialize(BoundVariables boundVariables, int arity, FunctionAndTypeManager functionAndTypeManager) {
    Type rowType = boundVariables.getTypeVariable("T");
    List<BiFunction<ConnectorSession, Block, Object>> converters = mapWithIndex(rowType.getTypeParameters().stream(), (type, index) -> converter(functionAndTypeManager, type, toIntExact(index))).collect(toImmutableList());
    return new BuiltInScalarFunctionImplementation(false, ImmutableList.of(valueTypeArgumentProperty(RETURN_NULL_ON_NULL), valueTypeArgumentProperty(RETURN_NULL_ON_NULL)), METHOD_HANDLE.bindTo(converters));
}