/*
* 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 com.facebook.presto.execution;
import com.facebook.presto.Session;
import com.facebook.presto.connector.ConnectorId;
import com.facebook.presto.metadata.Metadata;
import com.facebook.presto.metadata.QualifiedObjectName;
import com.facebook.presto.security.AccessControl;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.block.BlockBuilderStatus;
import com.facebook.presto.spi.procedure.Procedure;
import com.facebook.presto.spi.procedure.Procedure.Argument;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.sql.analyzer.SemanticException;
import com.facebook.presto.sql.planner.ParameterRewriter;
import com.facebook.presto.sql.tree.Call;
import com.facebook.presto.sql.tree.CallArgument;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.sql.tree.ExpressionTreeRewriter;
import com.facebook.presto.transaction.TransactionManager;
import com.google.common.util.concurrent.ListenableFuture;
import java.lang.invoke.MethodType;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.function.Predicate;
import static com.facebook.presto.metadata.MetadataUtil.createQualifiedObjectName;
import static com.facebook.presto.spi.StandardErrorCode.INVALID_PROCEDURE_ARGUMENT;
import static com.facebook.presto.spi.StandardErrorCode.INVALID_PROCEDURE_DEFINITION;
import static com.facebook.presto.spi.StandardErrorCode.NOT_SUPPORTED;
import static com.facebook.presto.spi.StandardErrorCode.PROCEDURE_CALL_FAILED;
import static com.facebook.presto.spi.type.TypeUtils.writeNativeValue;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.INVALID_PROCEDURE_ARGUMENTS;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.MISSING_CATALOG;
import static com.facebook.presto.sql.planner.ExpressionInterpreter.evaluateConstantExpression;
import static com.facebook.presto.util.Failures.checkCondition;
import static com.google.common.base.Throwables.propagateIfInstanceOf;
import static com.google.common.util.concurrent.Futures.immediateFuture;
import static java.util.Arrays.asList;
public class CallTask
implements DataDefinitionTask<Call>
{
@Override
public String getName()
{
return "CALL";
}
@Override
public ListenableFuture<?> execute(Call call, TransactionManager transactionManager, Metadata metadata, AccessControl accessControl, QueryStateMachine stateMachine, List<Expression> parameters)
{
if (!stateMachine.isAutoCommit()) {
throw new PrestoException(NOT_SUPPORTED, "Procedures cannot be called within a transaction (use autocommit mode)");
}
Session session = stateMachine.getSession();
QualifiedObjectName procedureName = createQualifiedObjectName(session, call, call.getName());
ConnectorId connectorId = metadata.getCatalogHandle(stateMachine.getSession(), procedureName.getCatalogName())
.orElseThrow(() -> new SemanticException(MISSING_CATALOG, call, "Catalog %s does not exist", procedureName.getCatalogName()));
Procedure procedure = metadata.getProcedureRegistry().resolve(connectorId, procedureName.asSchemaTableName());
// map declared argument names to positions
Map<String, Integer> positions = new HashMap<>();
for (int i = 0; i < procedure.getArguments().size(); i++) {
positions.put(procedure.getArguments().get(i).getName(), i);
}
// per specification, do not allow mixing argument types
Predicate<CallArgument> hasName = argument -> argument.getName().isPresent();
boolean anyNamed = call.getArguments().stream().anyMatch(hasName);
boolean allNamed = call.getArguments().stream().allMatch(hasName);
if (anyNamed && !allNamed) {
throw new SemanticException(INVALID_PROCEDURE_ARGUMENTS, call, "Named and positional arguments cannot be mixed");
}
// get the argument names in call order
Map<String, CallArgument> names = new LinkedHashMap<>();
for (int i = 0; i < call.getArguments().size(); i++) {
CallArgument argument = call.getArguments().get(i);
if (argument.getName().isPresent()) {
String name = argument.getName().get();
if (names.put(name, argument) != null) {
throw new SemanticException(INVALID_PROCEDURE_ARGUMENTS, argument, "Duplicate procedure argument: %s", name);
}
if (!positions.containsKey(name)) {
throw new SemanticException(INVALID_PROCEDURE_ARGUMENTS, argument, "Unknown argument name: %s", name);
}
}
else if (i < procedure.getArguments().size()) {
names.put(procedure.getArguments().get(i).getName(), argument);
}
else {
throw new SemanticException(INVALID_PROCEDURE_ARGUMENTS, call, "Too many arguments for procedure");
}
}
// verify argument count
if (names.size() < positions.size()) {
throw new SemanticException(INVALID_PROCEDURE_ARGUMENTS, call, "Too few arguments for procedure");
}
// get argument values
Object[] values = new Object[procedure.getArguments().size()];
for (Entry<String, CallArgument> entry : names.entrySet()) {
CallArgument callArgument = entry.getValue();
int index = positions.get(entry.getKey());
Argument argument = procedure.getArguments().get(index);
Expression expression = ExpressionTreeRewriter.rewriteWith(new ParameterRewriter(parameters), callArgument.getValue());
Type type = metadata.getType(argument.getType());
checkCondition(type != null, INVALID_PROCEDURE_DEFINITION, "Unknown procedure argument type: %s", argument.getType());
Object value = evaluateConstantExpression(expression, type, metadata, session, parameters);
values[index] = toTypeObjectValue(session, type, value);
}
// validate arguments
MethodType methodType = procedure.getMethodHandle().type();
for (int i = 0; i < procedure.getArguments().size(); i++) {
if ((values[i] == null) && methodType.parameterType(i).isPrimitive()) {
String name = procedure.getArguments().get(i).getName();
throw new PrestoException(INVALID_PROCEDURE_ARGUMENT, "Procedure argument cannot be null: " + name);
}
}
// insert session argument
List<Object> arguments = new ArrayList<>();
Iterator<Object> valuesIterator = asList(values).iterator();
for (Class<?> type : methodType.parameterList()) {
if (ConnectorSession.class.isAssignableFrom(type)) {
arguments.add(session.toConnectorSession(connectorId));
}
else {
arguments.add(valuesIterator.next());
}
}
try {
procedure.getMethodHandle().invokeWithArguments(arguments);
}
catch (Throwable t) {
if (t instanceof InterruptedException) {
Thread.currentThread().interrupt();
}
propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(PROCEDURE_CALL_FAILED, t);
}
return immediateFuture(null);
}
private static Object toTypeObjectValue(Session session, Type type, Object value)
{
BlockBuilder blockBuilder = type.createBlockBuilder(new BlockBuilderStatus(), 1);
writeNativeValue(type, blockBuilder, value);
return type.getObjectValue(session.toConnectorSession(), blockBuilder, 0);
}
}