/*
* 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.metadata.TableHandle;
import com.facebook.presto.metadata.TableMetadata;
import com.facebook.presto.security.AccessControl;
import com.facebook.presto.spi.ColumnMetadata;
import com.facebook.presto.spi.ConnectorTableMetadata;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.sql.analyzer.SemanticException;
import com.facebook.presto.sql.tree.ColumnDefinition;
import com.facebook.presto.sql.tree.CreateTable;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.sql.tree.LikeClause;
import com.facebook.presto.sql.tree.TableElement;
import com.facebook.presto.transaction.TransactionManager;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import static com.facebook.presto.metadata.MetadataUtil.createQualifiedObjectName;
import static com.facebook.presto.spi.StandardErrorCode.GENERIC_INTERNAL_ERROR;
import static com.facebook.presto.spi.StandardErrorCode.NOT_FOUND;
import static com.facebook.presto.spi.type.TypeSignature.parseTypeSignature;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.DUPLICATE_COLUMN_NAME;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.MISSING_CATALOG;
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.TABLE_ALREADY_EXISTS;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.TYPE_MISMATCH;
import static com.facebook.presto.type.UnknownType.UNKNOWN;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.util.concurrent.Futures.immediateFuture;
public class CreateTableTask
implements DataDefinitionTask<CreateTable>
{
@Override
public String getName()
{
return "CREATE TABLE";
}
@Override
public String explain(CreateTable statement, List<Expression> parameters)
{
return "CREATE TABLE " + statement.getName();
}
@Override
public ListenableFuture<?> execute(CreateTable statement, TransactionManager transactionManager, Metadata metadata, AccessControl accessControl, QueryStateMachine stateMachine, List<Expression> parameters)
{
checkArgument(!statement.getElements().isEmpty(), "no columns for table");
Session session = stateMachine.getSession();
QualifiedObjectName tableName = createQualifiedObjectName(session, statement, statement.getName());
Optional<TableHandle> tableHandle = metadata.getTableHandle(session, tableName);
if (tableHandle.isPresent()) {
if (!statement.isNotExists()) {
throw new SemanticException(TABLE_ALREADY_EXISTS, statement, "Table '%s' already exists", tableName);
}
return immediateFuture(null);
}
LinkedHashMap<String, ColumnMetadata> columns = new LinkedHashMap<>();
Map<String, Object> inheritedProperties = ImmutableMap.of();
boolean includingProperties = false;
for (TableElement element : statement.getElements()) {
if (element instanceof ColumnDefinition) {
ColumnDefinition column = (ColumnDefinition) element;
Type type = metadata.getType(parseTypeSignature(column.getType()));
if ((type == null) || type.equals(UNKNOWN)) {
throw new SemanticException(TYPE_MISMATCH, column, "Unknown type for column '%s' ", column.getName());
}
if (columns.containsKey(column.getName().toLowerCase())) {
throw new SemanticException(DUPLICATE_COLUMN_NAME, column, "Column name '%s' specified more than once", column.getName());
}
columns.put(column.getName().toLowerCase(), new ColumnMetadata(column.getName(), type, column.getComment().orElse(null), false));
}
else if (element instanceof LikeClause) {
LikeClause likeClause = (LikeClause) element;
QualifiedObjectName likeTableName = createQualifiedObjectName(session, statement, likeClause.getTableName());
if (!metadata.getCatalogHandle(session, likeTableName.getCatalogName()).isPresent()) {
throw new SemanticException(MISSING_CATALOG, statement, "LIKE table catalog '%s' does not exist", likeTableName.getCatalogName());
}
if (!tableName.getCatalogName().equals(likeTableName.getCatalogName())) {
throw new SemanticException(NOT_SUPPORTED, statement, "LIKE table across catalogs is not supported");
}
TableHandle likeTable = metadata.getTableHandle(session, likeTableName)
.orElseThrow(() -> new SemanticException(MISSING_TABLE, statement, "LIKE table '%s' does not exist", likeTableName));
TableMetadata likeTableMetadata = metadata.getTableMetadata(session, likeTable);
Optional<LikeClause.PropertiesOption> propertiesOption = likeClause.getPropertiesOption();
if (propertiesOption.isPresent() && propertiesOption.get().equals(LikeClause.PropertiesOption.INCLUDING)) {
if (includingProperties) {
throw new SemanticException(NOT_SUPPORTED, statement, "Only one LIKE clause can specify INCLUDING PROPERTIES");
}
includingProperties = true;
inheritedProperties = likeTableMetadata.getMetadata().getProperties();
}
likeTableMetadata.getColumns().stream()
.filter(column -> !column.isHidden())
.forEach(column -> {
if (columns.containsKey(column.getName().toLowerCase())) {
throw new SemanticException(DUPLICATE_COLUMN_NAME, element, "Column name '%s' specified more than once", column.getName());
}
columns.put(column.getName().toLowerCase(), column);
});
}
else {
throw new PrestoException(GENERIC_INTERNAL_ERROR, "Invalid TableElement: " + element.getClass().getName());
}
}
accessControl.checkCanCreateTable(session.getRequiredTransactionId(), session.getIdentity(), tableName);
ConnectorId connectorId = metadata.getCatalogHandle(session, tableName.getCatalogName())
.orElseThrow(() -> new PrestoException(NOT_FOUND, "Catalog does not exist: " + tableName.getCatalogName()));
Map<String, Object> properties = metadata.getTablePropertyManager().getProperties(
connectorId,
tableName.getCatalogName(),
statement.getProperties(),
session,
metadata,
parameters);
Map<String, Object> finalProperties = combineProperties(statement.getProperties().keySet(), properties, inheritedProperties);
ConnectorTableMetadata tableMetadata = new ConnectorTableMetadata(tableName.asSchemaTableName(), ImmutableList.copyOf(columns.values()), finalProperties, statement.getComment());
metadata.createTable(session, tableName.getCatalogName(), tableMetadata);
return immediateFuture(null);
}
private static Map<String, Object> combineProperties(Set<String> specifiedPropertyKeys, Map<String, Object> defaultProperties, Map<String, Object> inheritedProperties)
{
Map<String, Object> finalProperties = new HashMap<>();
finalProperties.putAll(inheritedProperties);
for (Map.Entry<String, Object> entry : defaultProperties.entrySet()) {
if (specifiedPropertyKeys.contains(entry.getKey()) || !finalProperties.containsKey(entry.getKey())) {
finalProperties.put(entry.getKey(), entry.getValue());
}
}
return finalProperties;
}
}