/
AddColumnTask.java
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/
AddColumnTask.java
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/*
* 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.common.QualifiedObjectName;
import com.facebook.presto.common.type.Type;
import com.facebook.presto.metadata.Metadata;
import com.facebook.presto.security.AccessControl;
import com.facebook.presto.spi.ColumnHandle;
import com.facebook.presto.spi.ColumnMetadata;
import com.facebook.presto.spi.ConnectorId;
import com.facebook.presto.spi.ConnectorMaterializedViewDefinition;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.TableHandle;
import com.facebook.presto.spi.WarningCollector;
import com.facebook.presto.sql.analyzer.SemanticException;
import com.facebook.presto.sql.tree.AddColumn;
import com.facebook.presto.sql.tree.ColumnDefinition;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.transaction.TransactionManager;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import static com.facebook.presto.common.type.TypeSignature.parseTypeSignature;
import static com.facebook.presto.common.type.UnknownType.UNKNOWN;
import static com.facebook.presto.metadata.MetadataUtil.createQualifiedObjectName;
import static com.facebook.presto.spi.StandardErrorCode.NOT_FOUND;
import static com.facebook.presto.spi.connector.ConnectorCapabilities.NOT_NULL_COLUMN_CONSTRAINT;
import static com.facebook.presto.sql.NodeUtils.mapFromProperties;
import static com.facebook.presto.sql.ParameterUtils.parameterExtractor;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.COLUMN_ALREADY_EXISTS;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.MISSING_TABLE;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.NOT_SUPPORTED;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.TYPE_MISMATCH;
import static com.google.common.util.concurrent.Futures.immediateFuture;
import static java.util.Locale.ENGLISH;
public class AddColumnTask
implements DDLDefinitionTask<AddColumn>
{
@Override
public String getName()
{
return "ADD COLUMN";
}
@Override
public ListenableFuture<?> execute(AddColumn statement, TransactionManager transactionManager, Metadata metadata, AccessControl accessControl, Session session, List<Expression> parameters, WarningCollector warningCollector)
{
QualifiedObjectName tableName = createQualifiedObjectName(session, statement, statement.getName());
Optional<TableHandle> tableHandle = metadata.getTableHandle(session, tableName);
if (!tableHandle.isPresent()) {
if (!statement.isTableExists()) {
throw new SemanticException(MISSING_TABLE, statement, "Table '%s' does not exist", tableName);
}
return immediateFuture(null);
}
Optional<ConnectorMaterializedViewDefinition> optionalMaterializedView = metadata.getMaterializedView(session, tableName);
if (optionalMaterializedView.isPresent()) {
if (!statement.isTableExists()) {
throw new SemanticException(NOT_SUPPORTED, statement, "'%s' is a materialized view, and add column is not supported", tableName);
}
return immediateFuture(null);
}
ConnectorId connectorId = metadata.getCatalogHandle(session, tableName.getCatalogName())
.orElseThrow(() -> new PrestoException(NOT_FOUND, "Catalog does not exist: " + tableName.getCatalogName()));
accessControl.checkCanAddColumns(session.getRequiredTransactionId(), session.getIdentity(), session.getAccessControlContext(), tableName);
Map<String, ColumnHandle> columnHandles = metadata.getColumnHandles(session, tableHandle.get());
ColumnDefinition element = statement.getColumn();
Type type;
try {
type = metadata.getType(parseTypeSignature(element.getType()));
}
catch (IllegalArgumentException e) {
throw new SemanticException(TYPE_MISMATCH, element, "Unknown type '%s' for column '%s'", element.getType(), element.getName());
}
if (type.equals(UNKNOWN)) {
throw new SemanticException(TYPE_MISMATCH, element, "Unknown type '%s' for column '%s'", element.getType(), element.getName());
}
if (columnHandles.containsKey(element.getName().getValue().toLowerCase(ENGLISH))) {
if (!statement.isColumnNotExists()) {
throw new SemanticException(COLUMN_ALREADY_EXISTS, statement, "Column '%s' already exists", element.getName());
}
return immediateFuture(null);
}
if (!element.isNullable() && !metadata.getConnectorCapabilities(session, connectorId).contains(NOT_NULL_COLUMN_CONSTRAINT)) {
throw new SemanticException(NOT_SUPPORTED, element, "Catalog '%s' does not support NOT NULL for column '%s'", connectorId.getCatalogName(), element.getName());
}
Map<String, Expression> sqlProperties = mapFromProperties(element.getProperties());
Map<String, Object> columnProperties = metadata.getColumnPropertyManager().getProperties(
connectorId,
tableName.getCatalogName(),
sqlProperties,
session,
metadata,
parameterExtractor(statement, parameters));
ColumnMetadata column = new ColumnMetadata(
element.getName().getValue(),
type,
element.isNullable(), element.getComment().orElse(null),
null,
false,
columnProperties);
metadata.addColumn(session, tableHandle.get(), column);
return immediateFuture(null);
}
}