/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.server.service.restdml;
import java.util.List;
import com.foundationdb.server.types.value.ValueSource;
import com.foundationdb.server.types.value.ValueSources;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.foundationdb.ais.model.AkibanInformationSchema;
import com.foundationdb.ais.model.CacheValueGenerator;
import com.foundationdb.ais.model.Index;
import com.foundationdb.ais.model.TableName;
import com.foundationdb.qp.operator.API;
import com.foundationdb.qp.operator.Cursor;
import com.foundationdb.qp.operator.Operator;
import com.foundationdb.qp.row.Row;
import com.foundationdb.server.service.session.Session;
import com.foundationdb.server.store.SchemaManager;
import com.foundationdb.server.store.Store;
import com.foundationdb.server.types.service.TypesRegistryService;
public class DeleteProcessor extends DMLProcessor {
private static final Logger LOG = LoggerFactory.getLogger(DeleteProcessor.class);
private DeleteGenerator deleteGenerator;
public DeleteProcessor (
Store store, SchemaManager schemaManager,
TypesRegistryService typesRegistryService) {
super (store, schemaManager, typesRegistryService);
}
private static final CacheValueGenerator<DeleteGenerator> CACHED_DELETE_GENERATOR =
new CacheValueGenerator<DeleteGenerator>() {
@Override
public DeleteGenerator valueFor(AkibanInformationSchema ais) {
return new DeleteGenerator(ais);
}
};
public void processDelete (Session session, AkibanInformationSchema ais, TableName tableName, String identifiers) {
ProcessContext context = new ProcessContext (ais, session, tableName);
deleteGenerator = getGenerator (CACHED_DELETE_GENERATOR, context);
Index pkIndex = context.table.getPrimaryKeyIncludingInternal().getIndex();
List<List<Object>> pks = PrimaryKeyParser.parsePrimaryKeys(identifiers, pkIndex);
Cursor cursor = null;
try {
Operator delete = deleteGenerator.create(tableName);
cursor = API.cursor(delete, context.queryContext, context.queryBindings);
for (List<Object> key : pks) {
for (int i = 0; i < key.size(); i++) {
ValueSource value = ValueSources.fromObject(key.get(i), null).value();
context.queryBindings.setValue(i, value);
}
cursor.openTopLevel();
Row row;
while ((row = cursor.next()) != null) {
// Do Nothing - the act of reading the cursor
// does the delete row processing.
// TODO: Check that we got 1 row through.
}
cursor.closeTopLevel();
}
} finally {
if (cursor != null && !cursor.isClosed())
cursor.close();
}
}
}