/*
* 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.connector.system.jdbc;
import com.facebook.presto.Session;
import com.facebook.presto.metadata.Metadata;
import com.facebook.presto.metadata.QualifiedTablePrefix;
import com.facebook.presto.security.AccessControl;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.ConnectorTableMetadata;
import com.facebook.presto.spi.InMemoryRecordSet;
import com.facebook.presto.spi.InMemoryRecordSet.Builder;
import com.facebook.presto.spi.RecordCursor;
import com.facebook.presto.spi.SchemaTableName;
import com.facebook.presto.spi.connector.ConnectorTransactionHandle;
import com.facebook.presto.spi.predicate.TupleDomain;
import javax.inject.Inject;
import java.util.Optional;
import static com.facebook.presto.connector.system.SystemConnectorSessionUtil.toSession;
import static com.facebook.presto.connector.system.jdbc.FilterUtil.filter;
import static com.facebook.presto.connector.system.jdbc.FilterUtil.stringFilter;
import static com.facebook.presto.connector.system.jdbc.FilterUtil.tablePrefix;
import static com.facebook.presto.metadata.MetadataListing.listCatalogs;
import static com.facebook.presto.metadata.MetadataListing.listTables;
import static com.facebook.presto.metadata.MetadataListing.listViews;
import static com.facebook.presto.metadata.MetadataUtil.TableMetadataBuilder.tableMetadataBuilder;
import static com.facebook.presto.spi.type.VarcharType.createUnboundedVarcharType;
import static java.util.Objects.requireNonNull;
public class TableJdbcTable
extends JdbcTable
{
public static final SchemaTableName NAME = new SchemaTableName("jdbc", "tables");
public static final ConnectorTableMetadata METADATA = tableMetadataBuilder(NAME)
.column("table_cat", createUnboundedVarcharType())
.column("table_schem", createUnboundedVarcharType())
.column("table_name", createUnboundedVarcharType())
.column("table_type", createUnboundedVarcharType())
.column("remarks", createUnboundedVarcharType())
.column("type_cat", createUnboundedVarcharType())
.column("type_schem", createUnboundedVarcharType())
.column("type_name", createUnboundedVarcharType())
.column("self_referencing_col_name", createUnboundedVarcharType())
.column("ref_generation", createUnboundedVarcharType())
.build();
private final Metadata metadata;
private final AccessControl accessControl;
@Inject
public TableJdbcTable(Metadata metadata, AccessControl accessControl)
{
this.metadata = requireNonNull(metadata, "metadata is null");
this.accessControl = requireNonNull(accessControl, "accessControl is null");
}
@Override
public ConnectorTableMetadata getTableMetadata()
{
return METADATA;
}
@Override
public RecordCursor cursor(ConnectorTransactionHandle transactionHandle, ConnectorSession connectorSession, TupleDomain<Integer> constraint)
{
Session session = toSession(transactionHandle, connectorSession);
Optional<String> catalogFilter = stringFilter(constraint, 0);
Optional<String> schemaFilter = stringFilter(constraint, 1);
Optional<String> tableFilter = stringFilter(constraint, 2);
Optional<String> typeFilter = stringFilter(constraint, 3);
Builder table = InMemoryRecordSet.builder(METADATA);
for (String catalog : filter(listCatalogs(session, metadata, accessControl).keySet(), catalogFilter)) {
QualifiedTablePrefix prefix = tablePrefix(catalog, schemaFilter, tableFilter);
if (FilterUtil.emptyOrEquals(typeFilter, "TABLE")) {
for (SchemaTableName name : listTables(session, metadata, accessControl, prefix)) {
table.addRow(tableRow(catalog, name, "TABLE"));
}
}
if (FilterUtil.emptyOrEquals(typeFilter, "VIEW")) {
for (SchemaTableName name : listViews(session, metadata, accessControl, prefix)) {
table.addRow(tableRow(catalog, name, "VIEW"));
}
}
}
return table.build().cursor();
}
private static Object[] tableRow(String catalog, SchemaTableName name, String type)
{
return new Object[] {catalog, name.getSchemaName(), name.getTableName(), type,
null, null, null, null, null, null};
}
}