/*
* 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.raptor.systemtables;
import com.facebook.presto.raptor.metadata.ForMetadata;
import com.facebook.presto.raptor.metadata.MetadataDao;
import com.facebook.presto.raptor.metadata.TableStatsRow;
import com.facebook.presto.spi.ColumnMetadata;
import com.facebook.presto.spi.ConnectorPageSource;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.ConnectorTableMetadata;
import com.facebook.presto.spi.FixedPageSource;
import com.facebook.presto.spi.Page;
import com.facebook.presto.spi.SchemaTableName;
import com.facebook.presto.spi.SystemTable;
import com.facebook.presto.spi.connector.ConnectorTransactionHandle;
import com.facebook.presto.spi.predicate.NullableValue;
import com.facebook.presto.spi.predicate.TupleDomain;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import org.skife.jdbi.v2.IDBI;
import javax.inject.Inject;
import java.util.List;
import java.util.Map;
import static com.facebook.presto.raptor.systemtables.TableMetadataSystemTable.getColumnIndex;
import static com.facebook.presto.raptor.systemtables.TableMetadataSystemTable.getStringValue;
import static com.facebook.presto.raptor.util.DatabaseUtil.onDemandDao;
import static com.facebook.presto.spi.SystemTable.Distribution.SINGLE_COORDINATOR;
import static com.facebook.presto.spi.predicate.TupleDomain.extractFixedValues;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.facebook.presto.spi.type.TimestampType.TIMESTAMP;
import static com.facebook.presto.spi.type.VarcharType.VARCHAR;
import static com.facebook.presto.spi.type.VarcharType.createUnboundedVarcharType;
import static io.airlift.slice.Slices.utf8Slice;
import static java.util.stream.Collectors.toList;
public class TableStatsSystemTable
implements SystemTable
{
private static final String SCHEMA_NAME = "table_schema";
private static final String TABLE_NAME = "table_name";
private static final ConnectorTableMetadata METADATA = new ConnectorTableMetadata(
new SchemaTableName("system", "table_stats"),
ImmutableList.<ColumnMetadata>builder()
.add(new ColumnMetadata(SCHEMA_NAME, createUnboundedVarcharType()))
.add(new ColumnMetadata(TABLE_NAME, createUnboundedVarcharType()))
.add(new ColumnMetadata("create_time", TIMESTAMP))
.add(new ColumnMetadata("update_time", TIMESTAMP))
.add(new ColumnMetadata("table_version", BIGINT))
.add(new ColumnMetadata("shard_count", BIGINT))
.add(new ColumnMetadata("row_count", BIGINT))
.add(new ColumnMetadata("compressed_size", BIGINT))
.add(new ColumnMetadata("uncompressed_size", BIGINT))
.build());
private final MetadataDao dao;
@Inject
public TableStatsSystemTable(@ForMetadata IDBI dbi)
{
this.dao = onDemandDao(dbi, MetadataDao.class);
}
@Override
public Distribution getDistribution()
{
return SINGLE_COORDINATOR;
}
@Override
public ConnectorTableMetadata getTableMetadata()
{
return METADATA;
}
@Override
public ConnectorPageSource pageSource(ConnectorTransactionHandle transactionHandle, ConnectorSession session, TupleDomain<Integer> constraint)
{
return new FixedPageSource(buildPages(dao, constraint));
}
private static List<Page> buildPages(MetadataDao dao, TupleDomain<Integer> tupleDomain)
{
Map<Integer, NullableValue> domainValues = extractFixedValues(tupleDomain).orElse(ImmutableMap.of());
String schemaName = getStringValue(domainValues.get(getColumnIndex(METADATA, SCHEMA_NAME)));
String tableName = getStringValue(domainValues.get(getColumnIndex(METADATA, TABLE_NAME)));
PageListBuilder pageBuilder = new PageListBuilder(METADATA.getColumns().stream()
.map(ColumnMetadata::getType)
.collect(toList()));
for (TableStatsRow row : dao.getTableStatsRows(schemaName, tableName)) {
pageBuilder.beginRow();
VARCHAR.writeSlice(pageBuilder.nextBlockBuilder(), utf8Slice(row.getSchemaName()));
VARCHAR.writeSlice(pageBuilder.nextBlockBuilder(), utf8Slice(row.getTableName()));
TIMESTAMP.writeLong(pageBuilder.nextBlockBuilder(), row.getCreateTime());
TIMESTAMP.writeLong(pageBuilder.nextBlockBuilder(), row.getUpdateTime());
BIGINT.writeLong(pageBuilder.nextBlockBuilder(), row.getTableVersion());
BIGINT.writeLong(pageBuilder.nextBlockBuilder(), row.getShardCount());
BIGINT.writeLong(pageBuilder.nextBlockBuilder(), row.getRowCount());
BIGINT.writeLong(pageBuilder.nextBlockBuilder(), row.getCompressedSize());
BIGINT.writeLong(pageBuilder.nextBlockBuilder(), row.getUncompressedSize());
}
return pageBuilder.build();
}
}