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io.trino.metadata.BuiltinFunctionResolver 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.metadata;
import com.google.common.cache.CacheBuilder;
import com.google.common.collect.ImmutableList;
import com.google.common.util.concurrent.UncheckedExecutionException;
import io.trino.cache.NonEvictableCache;
import io.trino.connector.system.GlobalSystemConnector;
import io.trino.metadata.FunctionBinder.CatalogFunctionBinding;
import io.trino.spi.TrinoException;
import io.trino.spi.function.FunctionDependencyDeclaration;
import io.trino.spi.function.OperatorType;
import io.trino.spi.function.Signature;
import io.trino.spi.type.Type;
import io.trino.spi.type.TypeManager;
import io.trino.sql.analyzer.TypeSignatureProvider;
import java.util.Collection;
import java.util.List;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static io.trino.cache.CacheUtils.uncheckedCacheGet;
import static io.trino.cache.SafeCaches.buildNonEvictableCache;
import static io.trino.metadata.FunctionResolver.resolveFunctionBinding;
import static io.trino.metadata.GlobalFunctionCatalog.BUILTIN_SCHEMA;
import static io.trino.metadata.GlobalFunctionCatalog.isBuiltinFunctionName;
import static io.trino.metadata.OperatorNameUtil.mangleOperatorName;
import static io.trino.spi.StandardErrorCode.FUNCTION_IMPLEMENTATION_ERROR;
import static io.trino.spi.StandardErrorCode.FUNCTION_IMPLEMENTATION_MISSING;
import static io.trino.spi.StandardErrorCode.FUNCTION_NOT_FOUND;
import static java.lang.String.format;
import static java.util.Objects.requireNonNull;
/**
* This class is designed for the exclusive use of Metadata, and is not intended for any other use.
*/
class BuiltinFunctionResolver
{
private final Metadata metadata;
private final TypeManager typeManager;
private final GlobalFunctionCatalog globalFunctionCatalog;
private final FunctionBinder functionBinder;
private final NonEvictableCache operatorCache;
private final NonEvictableCache coercionCache;
public BuiltinFunctionResolver(Metadata metadata, TypeManager typeManager, GlobalFunctionCatalog globalFunctionCatalog)
{
this.metadata = requireNonNull(metadata, "metadata is null");
this.typeManager = requireNonNull(typeManager, "typeManager is null");
this.globalFunctionCatalog = requireNonNull(globalFunctionCatalog, "globalFunctionCatalog is null");
this.functionBinder = new FunctionBinder(metadata, typeManager);
operatorCache = buildNonEvictableCache(CacheBuilder.newBuilder().maximumSize(1000));
coercionCache = buildNonEvictableCache(CacheBuilder.newBuilder().maximumSize(1000));
}
ResolvedFunction resolveBuiltinFunction(String name, List parameterTypes)
{
CatalogFunctionBinding functionBinding = functionBinder.bindFunction(parameterTypes, getBuiltinFunctions(name), name);
return resolveBuiltin(functionBinding);
}
ResolvedFunction resolveOperator(OperatorType operatorType, List argumentTypes)
throws OperatorNotFoundException
{
try {
return uncheckedCacheGet(operatorCache, new OperatorCacheKey(operatorType, argumentTypes),
() -> resolveBuiltinFunction(
mangleOperatorName(operatorType),
argumentTypes.stream()
.map(Type::getTypeSignature)
.map(TypeSignatureProvider::new)
.collect(toImmutableList())));
}
catch (UncheckedExecutionException e) {
if (e.getCause() instanceof TrinoException cause) {
if (cause.getErrorCode().getCode() == FUNCTION_NOT_FOUND.toErrorCode().getCode()) {
throw new OperatorNotFoundException(operatorType, argumentTypes, cause);
}
throw cause;
}
throw e;
}
}
ResolvedFunction resolveCoercion(OperatorType operatorType, Type fromType, Type toType)
{
checkArgument(operatorType == OperatorType.CAST || operatorType == OperatorType.SATURATED_FLOOR_CAST);
try {
return uncheckedCacheGet(coercionCache, new CoercionCacheKey(operatorType, fromType, toType),
() -> resolveCoercion(mangleOperatorName(operatorType), fromType, toType));
}
catch (UncheckedExecutionException e) {
if (e.getCause() instanceof TrinoException cause) {
if (cause.getErrorCode().getCode() == FUNCTION_IMPLEMENTATION_MISSING.toErrorCode().getCode()) {
throw new OperatorNotFoundException(operatorType, ImmutableList.of(fromType), toType.getTypeSignature(), cause);
}
throw cause;
}
throw e;
}
}
ResolvedFunction resolveCoercion(String functionName, Type fromType, Type toType)
{
CatalogFunctionBinding functionBinding = functionBinder.bindCoercion(
Signature.builder()
.returnType(toType)
.argumentType(fromType)
.build(),
getBuiltinFunctions(functionName));
return resolveBuiltin(functionBinding);
}
private ResolvedFunction resolveBuiltin(CatalogFunctionBinding functionBinding)
{
FunctionBinding binding = functionBinding.functionBinding();
FunctionDependencyDeclaration dependencies = globalFunctionCatalog.getFunctionDependencies(binding.getFunctionId(), binding.getBoundSignature());
return resolveFunctionBinding(
metadata,
typeManager,
functionBinder,
GlobalSystemConnector.CATALOG_HANDLE,
functionBinding.functionBinding(),
functionBinding.boundFunctionMetadata(),
dependencies,
catalogSchemaFunctionName -> {
// builtin functions can only depend on other builtin functions
if (!isBuiltinFunctionName(catalogSchemaFunctionName)) {
throw new TrinoException(
FUNCTION_IMPLEMENTATION_ERROR,
format("Builtin function %s cannot depend on a non-builtin function: %s", functionBinding.functionBinding().getBoundSignature().getName(), catalogSchemaFunctionName));
}
return getBuiltinFunctions(catalogSchemaFunctionName.getFunctionName());
},
this::resolveBuiltin);
}
private Collection getBuiltinFunctions(String functionName)
{
return globalFunctionCatalog.getBuiltInFunctions(functionName).stream()
.map(function -> new CatalogFunctionMetadata(GlobalSystemConnector.CATALOG_HANDLE, BUILTIN_SCHEMA, function))
.collect(toImmutableList());
}
private record OperatorCacheKey(OperatorType operatorType, List argumentTypes)
{
private OperatorCacheKey
{
requireNonNull(operatorType, "operatorType is null");
argumentTypes = ImmutableList.copyOf(requireNonNull(argumentTypes, "argumentTypes is null"));
}
}
private record CoercionCacheKey(OperatorType operatorType, Type fromType, Type toType)
{
private CoercionCacheKey
{
requireNonNull(operatorType, "operatorType is null");
requireNonNull(fromType, "fromType is null");
requireNonNull(toType, "toType is null");
}
}
}
