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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.drill.exec.planner.sql.handlers;
import static org.apache.drill.exec.planner.sql.SchemaUtilites.findSchema;
import org.apache.calcite.schema.SchemaPlus;
import org.apache.calcite.schema.Table;
import org.apache.calcite.sql.SqlNode;
import org.apache.drill.common.logical.FormatPluginConfig;
import org.apache.drill.exec.physical.PhysicalPlan;
import org.apache.drill.exec.planner.logical.DrillTable;
import org.apache.drill.exec.planner.sql.DirectPlan;
import org.apache.drill.exec.planner.sql.SchemaUtilites;
import org.apache.drill.exec.planner.sql.parser.SqlRefreshMetadata;
import org.apache.drill.exec.store.dfs.DrillFileSystem;
import org.apache.drill.exec.store.dfs.FileSelection;
import org.apache.drill.exec.store.dfs.FileSystemPlugin;
import org.apache.drill.exec.store.dfs.FormatSelection;
import org.apache.drill.exec.store.dfs.NamedFormatPluginConfig;
import org.apache.drill.exec.store.parquet.ParquetReaderConfig;
import org.apache.drill.exec.store.parquet.metadata.Metadata;
import org.apache.drill.exec.store.parquet.ParquetFormatConfig;
import org.apache.drill.exec.work.foreman.ForemanSetupException;
import org.apache.hadoop.fs.Path;
public class RefreshMetadataHandler extends DefaultSqlHandler {
private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(RefreshMetadataHandler.class);
public RefreshMetadataHandler(SqlHandlerConfig config) {
super(config);
}
private PhysicalPlan direct(boolean outcome, String message, Object... values){
return DirectPlan.createDirectPlan(context, outcome, String.format(message, values));
}
private PhysicalPlan notSupported(String tbl){
return direct(false, "Table %s does not support metadata refresh. Support is currently limited to directory-based Parquet tables.", tbl);
}
@Override
public PhysicalPlan getPlan(SqlNode sqlNode) throws ForemanSetupException {
final SqlRefreshMetadata refreshTable = unwrap(sqlNode, SqlRefreshMetadata.class);
try {
final SchemaPlus schema = findSchema(config.getConverter().getDefaultSchema(),
refreshTable.getSchemaPath());
if (schema == null) {
return direct(false, "Storage plugin or workspace does not exist [%s]",
SchemaUtilites.SCHEMA_PATH_JOINER.join(refreshTable.getSchemaPath()));
}
final String tableName = refreshTable.getName();
if (tableName.contains("*") || tableName.contains("?")) {
return direct(false, "Glob path %s not supported for metadata refresh", tableName);
}
final Table table = schema.getTable(tableName);
if (table == null) {
return direct(false, "Table %s does not exist.", tableName);
}
if (!(table instanceof DrillTable)) {
return notSupported(tableName);
}
final DrillTable drillTable = (DrillTable) table;
final Object selection = drillTable.getSelection();
if (selection instanceof FileSelection && ((FileSelection) selection).isEmptyDirectory()) {
return direct(false, "Table %s is empty and doesn't contain any parquet files.", tableName);
}
if (!(selection instanceof FormatSelection)) {
return notSupported(tableName);
}
FormatSelection formatSelection = (FormatSelection) selection;
FormatPluginConfig formatConfig = formatSelection.getFormat();
if (!((formatConfig instanceof ParquetFormatConfig) ||
((formatConfig instanceof NamedFormatPluginConfig) && ((NamedFormatPluginConfig) formatConfig).name.equals("parquet")))) {
return notSupported(tableName);
}
FileSystemPlugin plugin = (FileSystemPlugin) drillTable.getPlugin();
DrillFileSystem fs = new DrillFileSystem(plugin.getFormatPlugin(formatSelection.getFormat()).getFsConf());
Path selectionRoot = formatSelection.getSelection().getSelectionRoot();
if (!fs.getFileStatus(selectionRoot).isDirectory()) {
return notSupported(tableName);
}
if (!(formatConfig instanceof ParquetFormatConfig)) {
formatConfig = new ParquetFormatConfig();
}
ParquetReaderConfig readerConfig = ParquetReaderConfig.builder()
.withFormatConfig((ParquetFormatConfig) formatConfig)
.withOptions(context.getOptions())
.build();
Metadata.createMeta(fs, selectionRoot, readerConfig);
return direct(true, "Successfully updated metadata for table %s.", tableName);
} catch(Exception e) {
logger.error("Failed to update metadata for table '{}'", refreshTable.getName(), e);
return DirectPlan.createDirectPlan(context, false, String.format("Error: %s", e.getMessage()));
}
}
}
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