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OracleSymmetricDialect.java
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OracleSymmetricDialect.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 General Public License, version 3.0 (GPLv3)
* (the "License"); you may not use this file except in compliance
* with the License.
*
* You should have received a copy of the GNU General Public License,
* version 3.0 (GPLv3) 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.oracle;
import java.text.ParseException;
import java.util.Date;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.time.DateUtils;
import org.jumpmind.db.model.Table;
import org.jumpmind.db.platform.IDatabasePlatform;
import org.jumpmind.db.platform.PermissionType;
import org.jumpmind.db.sql.ISqlTransaction;
import org.jumpmind.db.sql.SqlException;
import org.jumpmind.db.util.BinaryEncoding;
import org.jumpmind.symmetric.common.ParameterConstants;
import org.jumpmind.symmetric.db.AbstractSymmetricDialect;
import org.jumpmind.symmetric.db.ISymmetricDialect;
import org.jumpmind.symmetric.db.SequenceIdentifier;
import org.jumpmind.symmetric.io.data.DataEventType;
import org.jumpmind.symmetric.model.Channel;
import org.jumpmind.symmetric.model.Trigger;
import org.jumpmind.symmetric.model.TriggerHistory;
import org.jumpmind.symmetric.service.IParameterService;
/*
* A dialect that is specific to Oracle databases
*/
public class OracleSymmetricDialect extends AbstractSymmetricDialect implements ISymmetricDialect {
static final String ORACLE_OBJECT_TYPE = "FUNCTION";
static final String SQL_SELECT_TRIGGERS = "from ALL_TRIGGERS where owner in (SELECT sys_context('USERENV', 'CURRENT_SCHEMA') FROM dual) and trigger_name like upper(?) and table_name like upper(?)";
static final String SQL_SELECT_TRANSACTIONS = "select min(start_time) from gv$transaction where status = 'ACTIVE'";
static final String SQL_OBJECT_INSTALLED = "select count(*) from user_source where line = 1 and (((type = 'FUNCTION' or type = 'PACKAGE') and name=upper('$(functionName)')) or (name||'_'||type=upper('$(functionName)')))" ;
static final String SQL_DROP_FUNCTION = "DROP FUNCTION $(functionName)";
public OracleSymmetricDialect(IParameterService parameterService, IDatabasePlatform platform) {
super(parameterService, platform);
this.triggerTemplate = new OracleTriggerTemplate(this);
try {
areDatabaseTransactionsPendingSince(System.currentTimeMillis());
supportsTransactionViews = true;
} catch (Exception ex) {
if (parameterService.is(ParameterConstants.DBDIALECT_ORACLE_USE_TRANSACTION_VIEW)) {
log.warn("Was not able to enable the use of transaction views. You might not have access to select from gv$transaction", ex);
}
}
}
@Override
protected void buildSqlReplacementTokens() {
super.buildSqlReplacementTokens();
if (parameterService.is(ParameterConstants.DBDIALECT_ORACLE_USE_HINTS, true)) {
sqlReplacementTokens.put("selectDataUsingGapsSqlHint", "/*+ index(d " + parameterService.getTablePrefix() + "_IDX_D_CHANNEL_ID) */");
}
}
@Override
protected boolean doesTriggerExistOnPlatform(String catalog, String schema, String tableName,
String triggerName) {
return platform.getSqlTemplate().queryForInt("select count(*) " + SQL_SELECT_TRIGGERS,
new Object[] { triggerName, tableName }) > 0;
}
@Override
protected String getDropTriggerSql(StringBuilder sqlBuffer, String catalogName,
String schemaName, String triggerName, String tableName) {
return "drop trigger " + triggerName;
}
@Override
public void createTrigger(StringBuilder sqlBuffer, DataEventType dml, Trigger trigger,
TriggerHistory history, Channel channel, String tablePrefix, Table table) {
try {
super.createTrigger(sqlBuffer, dml, trigger, history, channel,
parameterService.getTablePrefix(), table);
} catch (SqlException ex) {
if (ex.getErrorCode() == 4095) {
try {
// a trigger of the same name must already exist on a table
log.warn(
"TriggerAlreadyExists",
platform.getSqlTemplate().queryForMap(
"select * " + SQL_SELECT_TRIGGERS,
new Object[] { history.getTriggerNameForDmlType(dml),
history.getSourceTableName() }));
} catch (SqlException e) {
}
}
throw ex;
}
}
@Override
public void createRequiredDatabaseObjects() {
String blobToClob = this.parameterService.getTablePrefix() + "_" + "blob2clob";
if (!installed(SQL_OBJECT_INSTALLED, blobToClob)) {
String sql = "CREATE OR REPLACE FUNCTION $(functionName) (blob_in IN BLOB) "
+ " RETURN CLOB "
+ " AS "
+ " v_clob CLOB := null; "
+ " v_varchar VARCHAR2(32767); "
+ " v_start PLS_INTEGER := 1; "
+ " v_buffer PLS_INTEGER := 999; "
+ " BEGIN "
+ " IF blob_in IS NOT NULL THEN "
+ " IF DBMS_LOB.GETLENGTH(blob_in) > 0 THEN "
+ " DBMS_LOB.CREATETEMPORARY(v_clob, TRUE); "
+ " FOR i IN 1..CEIL(DBMS_LOB.GETLENGTH(blob_in) / v_buffer) "
+ " LOOP "
+ " v_varchar := UTL_RAW.CAST_TO_VARCHAR2(UTL_ENCODE.base64_encode(DBMS_LOB.SUBSTR(blob_in, v_buffer, v_start))); "
+ " v_varchar := REPLACE(v_varchar,CHR(13)||CHR(10)); "
+ " DBMS_LOB.WRITEAPPEND(v_clob, LENGTH(v_varchar), v_varchar); "
+ " v_start := v_start + v_buffer; "
+ " END LOOP; "
+ " END IF; "
+ " END IF; "
+ " RETURN v_clob; "
+ " END $(functionName); ";
install(sql, blobToClob);
}
String transactionId = this.parameterService.getTablePrefix() + "_" + "transaction_id";
if (!installed(SQL_OBJECT_INSTALLED, transactionId)) {
String sql = "CREATE OR REPLACE function $(functionName) "
+ " return varchar is "
+ " begin "
+ " return DBMS_TRANSACTION.local_transaction_id(false); "
+ " end; ";
install(sql, transactionId);
}
String triggerDisabled = this.parameterService.getTablePrefix() + "_" + "trigger_disabled";
if (!installed(SQL_OBJECT_INSTALLED, triggerDisabled)) {
String sql = "CREATE OR REPLACE function $(functionName) return varchar is "
+ " begin "
+ " return "+getSymmetricPackageName()+".disable_trigger; "
+ " end; ";
install(sql, triggerDisabled);
}
String pkgPackage = this.parameterService.getTablePrefix() + "_" + "pkg";
if (!installed(SQL_OBJECT_INSTALLED, pkgPackage)) {
String sql = "CREATE OR REPLACE package $(functionName) as "
+ " disable_trigger pls_integer; "
+ " disable_node_id varchar(50); "
+ " procedure setValue (a IN number); "
+ " procedure setNodeValue (node_id IN varchar); "
+ " end "+getSymmetricPackageName()+"; ";
install(sql, pkgPackage);
sql = "CREATE OR REPLACE package body $(functionName) as "
+ " procedure setValue(a IN number) is "
+ " begin "
+ " $(functionName).disable_trigger:=a; "
+ " end; "
+ " procedure setNodeValue(node_id IN varchar) is "
+ " begin "
+ " $(functionName).disable_node_id := node_id; "
+ " end; "
+ " end "+getSymmetricPackageName()+"; ";
install(sql, pkgPackage);
}
String wkt2geom = this.parameterService.getTablePrefix() + "_" + "wkt2geom";
if (!installed(SQL_OBJECT_INSTALLED, wkt2geom)) {
String sql = " CREATE OR REPLACE "
+ " FUNCTION $(functionName)( "
+ " clob_in IN CLOB) "
+ " RETURN SDO_GEOMETRY "
+ " AS "
+ " v_out SDO_GEOMETRY := NULL; "
+ " BEGIN "
+ " IF clob_in IS NOT NULL THEN "
+ " IF DBMS_LOB.GETLENGTH(clob_in) > 0 THEN "
+ " v_out := SDO_GEOMETRY(clob_in); "
+ " END IF; "
+ " END IF; "
+ " RETURN v_out; "
+ " END $(functionName); ";
install(sql, wkt2geom);
}
}
@Override
public void dropRequiredDatabaseObjects() {
String blobToClob = this.parameterService.getTablePrefix() + "_" + "blob2clob";
if (installed(SQL_OBJECT_INSTALLED, blobToClob)) {
uninstall(SQL_DROP_FUNCTION, blobToClob);
}
String transactionId = this.parameterService.getTablePrefix() + "_" + "transaction_id";
if (installed(SQL_OBJECT_INSTALLED, transactionId)) {
uninstall(SQL_DROP_FUNCTION, transactionId);
}
String triggerDisabled = this.parameterService.getTablePrefix() + "_" + "trigger_disabled";
if (installed(SQL_OBJECT_INSTALLED, triggerDisabled)) {
uninstall(SQL_DROP_FUNCTION, triggerDisabled);
}
String wkt2geom = this.parameterService.getTablePrefix() + "_" + "wkt2geom";
if (installed(SQL_OBJECT_INSTALLED, wkt2geom)) {
uninstall(SQL_DROP_FUNCTION, wkt2geom);
}
String pkgPackage = this.parameterService.getTablePrefix() + "_" + "pkg";
if (installed(SQL_OBJECT_INSTALLED, pkgPackage)) {
uninstall("DROP PACKAGE $(functionName)", pkgPackage);
}
}
@Override
public BinaryEncoding getBinaryEncoding() {
return BinaryEncoding.BASE64;
}
@Override
public String getTransactionTriggerExpression(String defaultCatalog, String defaultSchema,
Trigger trigger) {
return parameterService.getTablePrefix() + "_" + "transaction_id()";
}
@Override
public boolean supportsTransactionId() {
return true;
}
@Override
public String getSequenceName(SequenceIdentifier identifier) {
switch (identifier) {
case REQUEST:
return "SEQ_" + parameterService.getTablePrefix() + "_EXTRACT_EST_REQUEST_ID";
case DATA:
return "SEQ_" + parameterService.getTablePrefix() + "_DATA_DATA_ID";
case TRIGGER_HIST:
return "SEQ_" + parameterService.getTablePrefix() + "_TRIGGER_RIGGER_HIST_ID";
}
return null;
}
public void cleanDatabase() {
platform.getSqlTemplate().update("purge recyclebin");
}
protected String getSymmetricPackageName() {
return parameterService.getTablePrefix() + "_pkg";
}
public void disableSyncTriggers(ISqlTransaction transaction, String nodeId) {
transaction.prepareAndExecute(String.format("call %s.setValue(1)", getSymmetricPackageName()));
if (nodeId != null) {
transaction.prepareAndExecute(String.format("call %s.setNodeValue('" + nodeId + "')",
getSymmetricPackageName()));
}
}
public void enableSyncTriggers(ISqlTransaction transaction) {
transaction.prepareAndExecute(String.format("call %s.setValue(null)", getSymmetricPackageName()));
transaction.prepareAndExecute(String.format("call %s.setNodeValue(null)", getSymmetricPackageName()));
}
public String getSyncTriggersExpression() {
return parameterService.getTablePrefix() + "_trigger_disabled() is null";
}
@Override
public boolean areDatabaseTransactionsPendingSince(long time) {
String returnValue = platform.getSqlTemplate().queryForObject(SQL_SELECT_TRANSACTIONS,
String.class);
if (returnValue != null) {
Date date;
try {
date = DateUtils.parseDate(returnValue, new String[] { "MM/dd/yy HH:mm:ss" });
return date.getTime() < time;
} catch (ParseException e) {
log.error("", e);
return true;
}
} else {
return false;
}
}
@Override
public Date getEarliestTransactionStartTime() {
Date date = null;
String returnValue = platform.getSqlTemplate().queryForObject(SQL_SELECT_TRANSACTIONS, String.class);
if (returnValue != null) {
try {
date = DateUtils.parseDate(returnValue, new String[] { "MM/dd/yy HH:mm:ss" });
} catch (ParseException e) {
log.error("", e);
date = new Date();
}
}
return date;
}
@Override
public boolean supportsTransactionViews() {
return supportsTransactionViews
&& parameterService.is(ParameterConstants.DBDIALECT_ORACLE_USE_TRANSACTION_VIEW);
}
@Override
public String massageDataExtractionSql(String sql, Channel channel) {
if (channel != null && !channel.isContainsBigLob()) {
sql = StringUtils.replace(sql, "d.row_data", "dbms_lob.substr(d.row_data, 4000, 1 )");
sql = StringUtils.replace(sql, "d.old_data", "dbms_lob.substr(d.old_data, 4000, 1 )");
sql = StringUtils.replace(sql, "d.pk_data", "dbms_lob.substr(d.pk_data, 4000, 1 )");
}
sql = super.massageDataExtractionSql(sql, channel);
return sql;
}
@Override
public String massageForLob(String sql, Channel channel) {
if (channel != null && !channel.isContainsBigLob()) {
return String.format("dbms_lob.substr(%s, 4000, 1)", sql);
} else {
return super.massageForLob(sql, channel);
}
}
@Override
protected String getDbSpecificDataHasChangedCondition(Trigger trigger) {
if (!trigger.isUseCaptureLobs()) {
return "var_old_data is null or var_row_data != var_old_data";
} else {
return "dbms_lob.compare(nvl(var_row_data,'Null'),nvl(var_old_data,'Null')) != 0 ";
}
}
public String getTemplateNumberPrecisionSpec() {
return parameterService.getString(ParameterConstants.DBDIALECT_ORACLE_TEMPLATE_NUMBER_SPEC,"30,10");
}
@Override
public PermissionType[] getSymTablePermissions() {
PermissionType[] permissions = { PermissionType.CREATE_TABLE, PermissionType.DROP_TABLE, PermissionType.CREATE_TRIGGER, PermissionType.DROP_TRIGGER, PermissionType.EXECUTE};
return permissions;
}
}