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Db2SymmetricDialect.java
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Db2SymmetricDialect.java
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/*
* Licensed to JumpMind Inc under one or more contributor
* license agreements. See the NOTICE file distributed
* with this work for additional information regarding
* copyright ownership. JumpMind Inc licenses this file
* to you under the GNU Lesser General Public License (the
* "License"); you may not use this file except in compliance
* with the License.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/>.
*
* 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.jumpmind.symmetric.db.db2;
import org.jumpmind.db.platform.IDatabasePlatform;
import org.jumpmind.db.sql.ISqlTransaction;
import org.jumpmind.db.util.BinaryEncoding;
import org.jumpmind.symmetric.db.AbstractSymmetricDialect;
import org.jumpmind.symmetric.db.ISymmetricDialect;
import org.jumpmind.symmetric.model.Trigger;
import org.jumpmind.symmetric.service.IParameterService;
/*
* A dialect that is specific to DB2 databases
*/
public class Db2SymmetricDialect extends AbstractSymmetricDialect implements ISymmetricDialect {
public Db2SymmetricDialect(IParameterService parameterService, IDatabasePlatform platform) {
super(parameterService, platform);
this.triggerTemplate = new Db2TriggerTemplate(this);
}
protected boolean createTablesIfNecessary() {
boolean tablesCreated = super.createTablesIfNecessary();
if (tablesCreated) {
long triggerHistId = platform.getSqlTemplate().queryForLong("select max(trigger_hist_id) from "
+ parameterService.getTablePrefix() + "_trigger_hist") + 1;
platform.getSqlTemplate().update("alter table " + parameterService.getTablePrefix()
+ "_trigger_hist alter column trigger_hist_id restart with " + triggerHistId);
log.info("Resetting auto increment columns for {}", parameterService.getTablePrefix() + "_trigger_hist");
long dataId = platform.getSqlTemplate().queryForLong("select max(data_id) from " + parameterService.getTablePrefix()
+ "_data") + 1;
platform.getSqlTemplate().update("alter table " + parameterService.getTablePrefix()
+ "_data alter column data_id restart with " + dataId);
log.info("Resetting auto increment columns for {}", parameterService.getTablePrefix() + "_data");
}
return tablesCreated;
}
@Override
protected boolean doesTriggerExistOnPlatform(String catalog, String schema, String tableName,
String triggerName) {
schema = schema == null ? (platform.getDefaultSchema() == null ? null : platform
.getDefaultSchema()) : schema;
return platform.getSqlTemplate().queryForInt(
"select count(*) from syscat.triggers where trigname = ? and trigschema = ?",
new Object[] { triggerName.toUpperCase(), schema.toUpperCase() }) > 0;
}
@Override
public boolean isBlobSyncSupported() {
return true;
}
@Override
public boolean isClobSyncSupported() {
return true;
}
@Override
public BinaryEncoding getBinaryEncoding() {
return BinaryEncoding.HEX;
}
public void enableSyncTriggers(ISqlTransaction transaction) {
}
public void disableSyncTriggers(ISqlTransaction transaction, String nodeId) {
}
public String getSyncTriggersExpression() {
return "1=1";
}
@Override
public String getTransactionTriggerExpression(String defaultCatalog, String defaultSchema,
Trigger trigger) {
return "null";
}
@Override
public boolean supportsTransactionId() {
return false;
}
public void purge() {
}
@Override
public void truncateTable(String tableName) {
platform.getSqlTemplate().update("delete from " + tableName);
}
@Override
protected String getDbSpecificDataHasChangedCondition(Trigger trigger) {
return "var_old_data is null or var_row_data != var_old_data";
}
}