/*! ******************************************************************************
*
* Pentaho Data Integration
*
* Copyright (C) 2002-2016 by Pentaho : http://www.pentaho.com
*
*******************************************************************************
*
* 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.pentaho.di.core.database;
import org.pentaho.di.core.Const;
import org.pentaho.di.core.row.ValueMetaInterface;
/**
* Contains DB2 specific information through static final members
*
* @author Matt
* @since 11-mrt-2005
*/
public class CacheDatabaseMeta extends BaseDatabaseMeta implements DatabaseInterface {
@Override
public int[] getAccessTypeList() {
return new int[] {
DatabaseMeta.TYPE_ACCESS_NATIVE, DatabaseMeta.TYPE_ACCESS_ODBC, DatabaseMeta.TYPE_ACCESS_JNDI };
}
@Override
public int getDefaultDatabasePort() {
if ( getAccessType() == DatabaseMeta.TYPE_ACCESS_NATIVE ) {
return 1972;
}
return -1;
}
@Override
public boolean supportsSetCharacterStream() {
return false;
}
@Override
public boolean isFetchSizeSupported() {
return false;
}
/**
* @return Whether or not the database can use auto increment type of fields (pk)
*/
@Override
public boolean supportsAutoInc() {
return false;
}
@Override
public String getDriverClass() {
if ( getAccessType() == DatabaseMeta.TYPE_ACCESS_ODBC ) {
return "sun.jdbc.odbc.JdbcOdbcDriver";
} else {
return "com.intersys.jdbc.CacheDriver";
}
}
@Override
public String getURL( String hostname, String port, String databaseName ) {
if ( getAccessType() == DatabaseMeta.TYPE_ACCESS_ODBC ) {
return "jdbc:odbc:" + databaseName;
} else {
return "jdbc:Cache://" + hostname + ":" + port + "/" + databaseName;
}
}
/**
* Generates the SQL statement to add a column to the specified table
*
* @param tablename
* The table to add
* @param v
* The column defined as a value
* @param tk
* the name of the technical key field
* @param use_autoinc
* whether or not this field uses auto increment
* @param pk
* the name of the primary key field
* @param semicolon
* whether or not to add a semi-colon behind the statement.
* @return the SQL statement to add a column to the specified table
*/
@Override
public String getAddColumnStatement( String tablename, ValueMetaInterface v, String tk, boolean use_autoinc,
String pk, boolean semicolon ) {
return "ALTER TABLE "
+ tablename + " ADD COLUMN ( " + getFieldDefinition( v, tk, pk, use_autoinc, true, false ) + " ) ";
}
/**
* Generates the SQL statement to drop a column from the specified table
*
* @param tablename
* The table to add
* @param v
* The column defined as a value
* @param tk
* the name of the technical key field
* @param use_autoinc
* whether or not this field uses auto increment
* @param pk
* the name of the primary key field
* @param semicolon
* whether or not to add a semi-colon behind the statement.
* @return the SQL statement to drop a column from the specified table
*/
@Override
public String getDropColumnStatement( String tablename, ValueMetaInterface v, String tk, boolean use_autoinc,
String pk, boolean semicolon ) {
return "ALTER TABLE " + tablename + " DROP COLUMN " + v.getName() + Const.CR;
}
/**
* Generates the SQL statement to modify a column in the specified table
*
* @param tablename
* The table to add
* @param v
* The column defined as a value
* @param tk
* the name of the technical key field
* @param use_autoinc
* whether or not this field uses auto increment
* @param pk
* the name of the primary key field
* @param semicolon
* whether or not to add a semi-colon behind the statement.
* @return the SQL statement to modify a column in the specified table
*/
@Override
public String getModifyColumnStatement( String tablename, ValueMetaInterface v, String tk, boolean use_autoinc,
String pk, boolean semicolon ) {
return "ALTER TABLE "
+ tablename + " ALTER COLUMN " + getFieldDefinition( v, tk, pk, use_autoinc, true, false );
}
@Override
public String getFieldDefinition( ValueMetaInterface v, String tk, String pk, boolean use_autoinc,
boolean add_fieldname, boolean add_cr ) {
String retval = "";
String fieldname = v.getName();
int length = v.getLength();
int precision = v.getPrecision();
if ( add_fieldname ) {
retval += fieldname + " ";
}
int type = v.getType();
switch ( type ) {
case ValueMetaInterface.TYPE_TIMESTAMP:
case ValueMetaInterface.TYPE_DATE:
retval += "TIMESTAMP";
break;
case ValueMetaInterface.TYPE_BOOLEAN:
retval += "CHAR(1)";
break;
case ValueMetaInterface.TYPE_NUMBER:
case ValueMetaInterface.TYPE_INTEGER:
case ValueMetaInterface.TYPE_BIGNUMBER:
if ( fieldname.equalsIgnoreCase( tk ) ) { // Technical & primary key : see at bottom
retval += "DECIMAL";
} else {
if ( length < 0 || precision < 0 ) {
retval += "DOUBLE";
} else if ( precision > 0 || length > 9 ) {
retval += "DECIMAL(" + length;
if ( precision > 0 ) {
retval += ", " + precision;
}
retval += ")";
} else {
// Precision == 0 && length<=9
retval += "INT";
}
}
break;
case ValueMetaInterface.TYPE_STRING: // CLOBs are just VARCHAR in the Cache database: can be very large!
retval += "VARCHAR";
if ( length > 0 ) {
retval += "(" + length + ")";
}
break;
default:
retval += " UNKNOWN";
break;
}
if ( add_cr ) {
retval += Const.CR;
}
return retval;
}
@Override
public String[] getUsedLibraries() {
return new String[] { "CacheDB.jar" };
}
/**
* @return true if we need to append the PRIMARY KEY block in the create table block after the fields, required for
* Cache.
*/
@Override
public boolean requiresCreateTablePrimaryKeyAppend() {
return true;
}
/**
* @return true if the database supports newlines in a SQL statements.
*/
@Override
public boolean supportsNewLinesInSQL() {
return false;
}
}