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io.trino.operator.scalar.MapSubscriptOperator Maven / Gradle / Ivy
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.trino.operator.scalar;
import com.google.common.collect.ImmutableList;
import com.google.common.primitives.Primitives;
import io.airlift.slice.Slice;
import io.trino.annotation.UsedByGeneratedCode;
import io.trino.metadata.SqlScalarFunction;
import io.trino.spi.TrinoException;
import io.trino.spi.block.SqlMap;
import io.trino.spi.connector.ConnectorSession;
import io.trino.spi.function.BoundSignature;
import io.trino.spi.function.FunctionDependencies;
import io.trino.spi.function.FunctionDependencyDeclaration;
import io.trino.spi.function.FunctionMetadata;
import io.trino.spi.function.InvocationConvention;
import io.trino.spi.function.Signature;
import io.trino.spi.type.MapType;
import io.trino.spi.type.Type;
import io.trino.spi.type.TypeSignature;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import static io.trino.spi.StandardErrorCode.INVALID_FUNCTION_ARGUMENT;
import static io.trino.spi.function.InvocationConvention.InvocationArgumentConvention.BOXED_NULLABLE;
import static io.trino.spi.function.InvocationConvention.InvocationArgumentConvention.NEVER_NULL;
import static io.trino.spi.function.InvocationConvention.InvocationReturnConvention.NULLABLE_RETURN;
import static io.trino.spi.function.OperatorType.SUBSCRIPT;
import static io.trino.spi.type.TypeSignature.mapType;
import static io.trino.spi.type.TypeUtils.readNativeValue;
import static io.trino.spi.type.VarcharType.VARCHAR;
import static io.trino.util.Reflection.methodHandle;
public class MapSubscriptOperator
extends SqlScalarFunction
{
private static final MethodHandle METHOD_HANDLE_BOOLEAN = methodHandle(MapSubscriptOperator.class, "subscript", MissingKeyExceptionFactory.class, Type.class, Type.class, ConnectorSession.class, SqlMap.class, boolean.class);
private static final MethodHandle METHOD_HANDLE_LONG = methodHandle(MapSubscriptOperator.class, "subscript", MissingKeyExceptionFactory.class, Type.class, Type.class, ConnectorSession.class, SqlMap.class, long.class);
private static final MethodHandle METHOD_HANDLE_DOUBLE = methodHandle(MapSubscriptOperator.class, "subscript", MissingKeyExceptionFactory.class, Type.class, Type.class, ConnectorSession.class, SqlMap.class, double.class);
private static final MethodHandle METHOD_HANDLE_OBJECT = methodHandle(MapSubscriptOperator.class, "subscript", MissingKeyExceptionFactory.class, Type.class, Type.class, ConnectorSession.class, SqlMap.class, Object.class);
public MapSubscriptOperator()
{
super(FunctionMetadata.operatorBuilder(SUBSCRIPT)
.signature(Signature.builder()
.typeVariable("K")
.typeVariable("V")
.returnType(new TypeSignature("V"))
.argumentType(mapType(new TypeSignature("K"), new TypeSignature("V")))
.argumentType(new TypeSignature("K"))
.build())
.nullable()
.build());
}
@Override
public FunctionDependencyDeclaration getFunctionDependencies()
{
return FunctionDependencyDeclaration.builder()
.addOptionalCastSignature(new TypeSignature("K"), VARCHAR.getTypeSignature())
.build();
}
@Override
public SpecializedSqlScalarFunction specialize(BoundSignature boundSignature, FunctionDependencies functionDependencies)
{
MapType mapType = (MapType) boundSignature.getArgumentType(0);
Type keyType = mapType.getKeyType();
Type valueType = mapType.getValueType();
MethodHandle methodHandle;
if (keyType.getJavaType() == boolean.class) {
methodHandle = METHOD_HANDLE_BOOLEAN;
}
else if (keyType.getJavaType() == long.class) {
methodHandle = METHOD_HANDLE_LONG;
}
else if (keyType.getJavaType() == double.class) {
methodHandle = METHOD_HANDLE_DOUBLE;
}
else {
methodHandle = METHOD_HANDLE_OBJECT;
}
MissingKeyExceptionFactory missingKeyExceptionFactory = new MissingKeyExceptionFactory(functionDependencies, keyType);
methodHandle = methodHandle.bindTo(missingKeyExceptionFactory).bindTo(keyType).bindTo(valueType);
methodHandle = methodHandle.asType(methodHandle.type().changeReturnType(Primitives.wrap(valueType.getJavaType())));
return new ChoicesSpecializedSqlScalarFunction(
boundSignature,
NULLABLE_RETURN,
ImmutableList.of(NEVER_NULL, NEVER_NULL),
methodHandle);
}
@UsedByGeneratedCode
public static Object subscript(MissingKeyExceptionFactory missingKeyExceptionFactory, Type keyType, Type valueType, ConnectorSession session, SqlMap sqlMap, boolean key)
{
int index = sqlMap.seekKeyExact(key);
if (index == -1) {
throw missingKeyExceptionFactory.create(session, key);
}
return readNativeValue(valueType, sqlMap.getRawValueBlock(), sqlMap.getRawOffset() + index);
}
@UsedByGeneratedCode
public static Object subscript(MissingKeyExceptionFactory missingKeyExceptionFactory, Type keyType, Type valueType, ConnectorSession session, SqlMap sqlMap, long key)
{
int index = sqlMap.seekKeyExact(key);
if (index == -1) {
throw missingKeyExceptionFactory.create(session, key);
}
return readNativeValue(valueType, sqlMap.getRawValueBlock(), sqlMap.getRawOffset() + index);
}
@UsedByGeneratedCode
public static Object subscript(MissingKeyExceptionFactory missingKeyExceptionFactory, Type keyType, Type valueType, ConnectorSession session, SqlMap sqlMap, double key)
{
int index = sqlMap.seekKeyExact(key);
if (index == -1) {
throw missingKeyExceptionFactory.create(session, key);
}
return readNativeValue(valueType, sqlMap.getRawValueBlock(), sqlMap.getRawOffset() + index);
}
@UsedByGeneratedCode
public static Object subscript(MissingKeyExceptionFactory missingKeyExceptionFactory, Type keyType, Type valueType, ConnectorSession session, SqlMap sqlMap, Object key)
{
int index = sqlMap.seekKeyExact(key);
if (index == -1) {
throw missingKeyExceptionFactory.create(session, key);
}
return readNativeValue(valueType, sqlMap.getRawValueBlock(), sqlMap.getRawOffset() + index);
}
private static class MissingKeyExceptionFactory
{
private final MethodHandle castMethod;
public MissingKeyExceptionFactory(FunctionDependencies functionDependencies, Type keyType)
{
MethodHandle castMethod = null;
try {
InvocationConvention invocationConvention = new InvocationConvention(ImmutableList.of(BOXED_NULLABLE), NULLABLE_RETURN, true, false);
castMethod = functionDependencies.getCastImplementation(keyType, VARCHAR, invocationConvention).getMethodHandle();
if (!castMethod.type().parameterType(0).equals(ConnectorSession.class)) {
castMethod = MethodHandles.dropArguments(castMethod, 0, ConnectorSession.class);
}
}
catch (TrinoException ignored) {
}
this.castMethod = castMethod;
}
public TrinoException create(ConnectorSession session, Object value)
{
String additionalInfo = "";
if (castMethod != null) {
Slice varcharValue = null;
try {
varcharValue = (Slice) castMethod.invokeWithArguments(session, value);
}
catch (Throwable ignored) {
}
additionalInfo = ": " + (varcharValue == null ? "NULL" : varcharValue.toStringUtf8());
}
return new TrinoException(INVALID_FUNCTION_ARGUMENT, "Key not present in map" + additionalInfo);
}
}
}
