/*
* DBeaver - Universal Database Manager
* Copyright (C) 2013-2016 Denis Forveille (titou10.titou10@gmail.com)
* Copyright (C) 2010-2017 Serge Rider (serge@jkiss.org)
*
* 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 org.jkiss.dbeaver.ext.db2.model.cache;
import org.jkiss.code.NotNull;
import org.jkiss.code.Nullable;
import org.jkiss.dbeaver.DBException;
import org.jkiss.dbeaver.ext.db2.editors.DB2ObjectType;
import org.jkiss.dbeaver.ext.db2.model.DB2MaterializedQueryTable;
import org.jkiss.dbeaver.ext.db2.model.DB2Schema;
import org.jkiss.dbeaver.ext.db2.model.DB2TableColumn;
import org.jkiss.dbeaver.ext.db2.model.dict.DB2TableType;
import org.jkiss.dbeaver.model.exec.jdbc.JDBCPreparedStatement;
import org.jkiss.dbeaver.model.exec.jdbc.JDBCResultSet;
import org.jkiss.dbeaver.model.exec.jdbc.JDBCSession;
import org.jkiss.dbeaver.model.exec.jdbc.JDBCStatement;
import org.jkiss.dbeaver.model.impl.jdbc.cache.JDBCStructLookupCache;
import java.sql.SQLException;
/**
* Cache for DB2 MQT
*
* @author Denis Forveille
*/
public final class DB2MaterializedQueryTableCache
extends JDBCStructLookupCache<DB2Schema, DB2MaterializedQueryTable, DB2TableColumn> {
private static final String SQL_COLS_TAB = "SELECT * FROM SYSCAT.COLUMNS WHERE TABSCHEMA=? AND TABNAME = ? ORDER BY COLNO WITH UR";
private static final String SQL_COLS_ALL = "SELECT * FROM SYSCAT.COLUMNS WHERE TABSCHEMA=? ORDER BY TABNAME, COLNO WITH UR";
private static final String SQL_MQT;
private static final String SQL_MQT_ALL;
static {
StringBuilder sb = new StringBuilder(256);
sb.append("SELECT *");
sb.append(" FROM SYSCAT.TABLES T");
sb.append(" , SYSCAT.VIEWS V");
sb.append(" WHERE V.VIEWSCHEMA = ?");
sb.append(" AND T.TABSCHEMA = V.VIEWSCHEMA");
sb.append(" AND T.TABNAME = V.VIEWNAME");
sb.append(" AND T.TYPE IN ").append(DB2TableType.getInClause(DB2ObjectType.MQT));
sb.append(" ORDER BY T.TABNAME");
sb.append(" WITH UR");
SQL_MQT_ALL = sb.toString();
sb.setLength(0);
sb.append("SELECT *");
sb.append(" FROM SYSCAT.TABLES T");
sb.append(" , SYSCAT.VIEWS V");
sb.append(" WHERE V.VIEWSCHEMA = ?");
sb.append(" AND V.VIEWNAME = ?");
sb.append(" AND T.TABSCHEMA = V.VIEWSCHEMA");
sb.append(" AND T.TABNAME = V.VIEWNAME");
sb.append(" AND T.TYPE IN ").append(DB2TableType.getInClause(DB2ObjectType.MQT));
sb.append(" WITH UR");
SQL_MQT = sb.toString();
}
public DB2MaterializedQueryTableCache()
{
super("TABNAME");
}
@NotNull
@Override
public JDBCStatement prepareLookupStatement(@NotNull JDBCSession session, @NotNull DB2Schema db2Schema,
DB2MaterializedQueryTable db2MaterializedQueryTable, String db2MaterializedQueryTableName) throws SQLException
{
if (db2MaterializedQueryTable != null || db2MaterializedQueryTableName != null) {
final JDBCPreparedStatement dbStat = session.prepareStatement(SQL_MQT);
dbStat.setString(1, db2Schema.getName());
dbStat.setString(2,
db2MaterializedQueryTable != null ? db2MaterializedQueryTable.getName() : db2MaterializedQueryTableName);
return dbStat;
} else {
final JDBCPreparedStatement dbStat = session.prepareStatement(SQL_MQT_ALL);
dbStat.setString(1, db2Schema.getName());
return dbStat;
}
}
@Override
protected DB2MaterializedQueryTable fetchObject(@NotNull JDBCSession session, @NotNull DB2Schema db2Schema,
@NotNull JDBCResultSet dbResult) throws SQLException, DBException
{
return new DB2MaterializedQueryTable(session.getProgressMonitor(), db2Schema, dbResult);
}
@Override
protected JDBCStatement prepareChildrenStatement(@NotNull JDBCSession session, @NotNull DB2Schema db2Schema,
@Nullable DB2MaterializedQueryTable forMqt) throws SQLException
{
String sql;
if (forMqt != null) {
sql = SQL_COLS_TAB;
} else {
sql = SQL_COLS_ALL;
}
JDBCPreparedStatement dbStat = session.prepareStatement(sql);
dbStat.setString(1, db2Schema.getName());
if (forMqt != null) {
dbStat.setString(2, forMqt.getName());
}
return dbStat;
}
@Override
protected DB2TableColumn fetchChild(@NotNull JDBCSession session, @NotNull DB2Schema db2Schema,
@NotNull DB2MaterializedQueryTable db2MQT, @NotNull JDBCResultSet dbResult) throws SQLException, DBException
{
return new DB2TableColumn(session.getProgressMonitor(), db2MQT, dbResult);
}
}