/*! ******************************************************************************
*
* 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 AS/400 specific information through static final members
*
* @author Matt
* @since 11-mrt-2005
*/
public class AS400DatabaseMeta 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 String getDriverClass() {
if ( getAccessType() == DatabaseMeta.TYPE_ACCESS_ODBC ) {
return "sun.jdbc.odbc.JdbcOdbcDriver";
} else {
return "com.ibm.as400.access.AS400JDBCDriver";
}
}
/**
* Get the maximum length of a text field for this database connection. This includes optional CLOB, Memo and Text
* fields. (the maximum!)
*
* @return The maximum text field length for this database type. (mostly CLOB_LENGTH)
*/
@Override
public int getMaxTextFieldLength() {
return 65536;
}
@Override
public String getURL( String hostname, String port, String database ) {
if ( getAccessType() == DatabaseMeta.TYPE_ACCESS_ODBC ) {
return "jdbc:odbc:" + database;
} else {
return "jdbc:as400://" + hostname + "/" + database;
}
}
/**
* @param tableName
* The table to be truncated.
* @return The SQL statement to truncate a table: remove all rows from it without a transaction
*/
@Override
public String getTruncateTableStatement( String tableName ) {
return "DELETE FROM " + tableName;
}
/**
* 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 " + getFieldDefinition( v, tk, pk, use_autoinc, true, false );
}
/**
* 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 " + v.getName() + " SET "
+ getFieldDefinition( v, tk, pk, use_autoinc, false, 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 ( length <= 0 && precision <= 0 ) {
retval += "DOUBLE";
} else {
retval += "DECIMAL";
if ( length > 0 ) {
retval += "(" + length;
if ( precision > 0 ) {
retval += ", " + precision;
}
retval += ")";
}
}
break;
case ValueMetaInterface.TYPE_STRING:
if ( length > getMaxVARCHARLength() || length >= DatabaseMeta.CLOB_LENGTH ) {
retval += "CLOB";
} else {
retval += "VARCHAR";
if ( length > 0 ) {
retval += "(" + length;
} else {
retval += "("; // Maybe use some default DB String length?
}
retval += ")";
}
break;
default:
retval += " UNKNOWN";
break;
}
if ( add_cr ) {
retval += Const.CR;
}
return retval;
}
/*
* (non-Javadoc)
*
* @see DatabaseInterface#getReservedWords()
*/
@Override
public String[] getReservedWords() {
return new String[] {
// http://publib.boulder.ibm.com/infocenter/iseries/v5r4/index.jsp
// This is the list of currently reserved DB2 UDB for iSeries words. Words may be added at any time.
// For a list of additional words that may become reserved in the future, see the IBM SQL and
// ANSI reserved words in the IBM SQL Reference Version 1 SC26-3255.
"ACTIVATE", "ADD", "ALIAS", "ALL", "ALLOCATE", "ALLOW", "ALTER", "AND", "ANY", "AS", "ASENSITIVE", "AT",
"ATTRIBUTES", "AUTHORIZATION", "BEGIN", "BETWEEN", "BINARY", "BY", "CACHE", "CALL", "CALLED",
"CARDINALITY", "CASE", "CAST", "CCSID", "CHAR", "CHARACTER", "CHECK", "CLOSE", "COLLECTION", "COLUMN",
"COMMENT", "COMMIT", "CONCAT", "CONDITION", "CONNECT", "CONNECTION", "CONSTRAINT", "CONTAINS", "CONTINUE",
"COUNT", "COUNT_BIG", "CREATE", "CROSS", "CURRENT", "CURRENT_DATE", "CURRENT_PATH", "CURRENT_SCHEMA",
"CURRENT_SERVER", "CURRENT_TIME", "CURRENT_TIMESTAMP", "CURRENT_TIMEZONE", "CURRENT_USER", "CURSOR",
"CYCLE", "DATABASE", "DATAPARTITIONNAME", "DATAPARTITIONNUM", "DATE", "DAY", "DAYS", "DBINFO",
"DBPARTITIONNAME", "DBPARTITIONNUM", "DB2GENERAL", "DB2GENRL", "DB2SQL", "DEALLOCATE", "DECLARE",
"DEFAULT", "DEFAULTS", "DEFINITION", "DELETE", "DENSERANK", "DENSE_RANK", "DESCRIBE", "DESCRIPTOR",
"DETERMINISTIC", "DIAGNOSTICS", "DISABLE", "DISALLOW", "DISCONNECT", "DISTINCT", "DO", "DOUBLE", "DROP",
"DYNAMIC", "EACH", "ELSE", "ELSEIF", "ENABLE", "ENCRYPTION", "END", "ENDING", "END-EXEC", "ESCAPE",
"EVERY", "EXCEPT", "EXCEPTION", "EXCLUDING", "EXCLUSIVE", "EXECUTE", "EXISTS", "EXIT", "EXTERNAL",
"EXTRACT", "FENCED", "FETCH", "FILE", "FINAL", "FOR", "FOREIGN", "FREE", "FROM", "FULL", "FUNCTION",
"GENERAL", "GENERATED", "GET", "GLOBAL", "GO", "GOTO", "GRANT", "GRAPHIC", "GROUP", "HANDLER", "HASH",
"HASHED_VALUE", "HAVING", "HINT", "HOLD", "HOUR", "HOURS", "IDENTITY", "IF", "IMMEDIATE", "IN",
"INCLUDING", "INCLUSIVE", "INCREMENT", "INDEX", "INDICATOR", "INHERIT", "INNER", "INOUT", "INSENSITIVE",
"INSERT", "INTEGRITY", "INTERSECT", "INTO", "IS", "ISOLATION", "ITERATE", "JAVA", "JOIN", "KEY", "LABEL",
"LANGUAGE", "LATERAL", "LEAVE", "LEFT", "LIKE", "LINKTYPE", "LOCAL", "LOCALDATE", "LOCALTIME",
"LOCALTIMESTAMP", "LOCK", "LONG", "LOOP", "MAINTAINED", "MATERIALIZED", "MAXVALUE", "MICROSECOND",
"MICROSECONDS", "MINUTE", "MINUTES", "MINVALUE", "MODE", "MODIFIES", "MONTH", "MONTHS", "NEW",
"NEW_TABLE", "NEXTVAL", "NO", "NOCACHE", "NOCYCLE", "NODENAME", "NODENUMBER", "NOMAXVALUE", "NOMINVALUE",
"NOORDER", "NORMALIZED", "NOT", "NULL", "OF", "OLD", "OLD_TABLE", "ON", "OPEN", "OPTIMIZE", "OPTION",
"OR", "ORDER", "OUT", "OUTER", "OVER", "OVERRIDING", "PACKAGE", "PAGESIZE", "PARAMETER", "PART",
"PARTITION", "PARTITIONING", "PARTITIONS", "PASSWORD", "PATH", "POSITION", "PREPARE", "PREVVAL",
"PRIMARY", "PRIVILEGES", "PROCEDURE", "PROGRAM", "QUERY", "RANGE", "RANK", "READ", "READS", "RECOVERY",
"REFERENCES", "REFERENCING", "REFRESH", "RELEASE", "RENAME", "REPEAT", "RESET", "RESIGNAL", "RESTART",
"RESULT", "RETURN", "RETURNS", "REVOKE", "RIGHT", "ROLLBACK", "ROUTINE", "ROW", "ROWNUMBER", "ROW_NUMBER",
"ROWS", "RRN", "RUN", "SAVEPOINT", "SCHEMA", "SCRATCHPAD", "SCROLL", "SEARCH", "SECOND", "SECONDS",
"SELECT", "SENSITIVE", "SEQUENCE", "SESSION", "SESSION_USER", "SET", "SIGNAL", "SIMPLE", "SOME", "SOURCE",
"SPECIFIC", "SQL", "SQLID", "STACKED", "START", "STARTING", "STATEMENT", "STATIC", "SUBSTRING", "SUMMARY",
"SYNONYM", "SYSTEM_USER", "TABLE", "THEN", "TIME", "TIMESTAMP", "TO", "TRANSACTION", "TRIGGER", "TRIM",
"TYPE", "UNDO", "UNION", "UNIQUE", "UNTIL", "UPDATE", "USAGE", "USER", "USING", "VALUE", "VALUES",
"VARIABLE", "VARIANT", "VERSION", "VIEW", "VOLATILE", "WHEN", "WHERE", "WHILE", "WITH", "WITHOUT",
"WRITE", "YEAR", "YEARS" };
}
/**
* @return the required libraries (in lib) for this database connection.
*/
@Override
public String[] getUsedLibraries() {
return new String[] { "jt400.jar" };
}
/**
* Most databases round number(7,2) 17.29999999 to 17.30, but some don't.
*
* @return true if the database supports roundinf of floating point data on update/insert
*/
@Override
public boolean supportsFloatRoundingOnUpdate() {
return false;
}
/**
* Get the maximum length of a text field (VARCHAR) for this database connection. If this size is exceeded use a CLOB.
*
* @return The maximum VARCHAR field length for this database type. (mostly identical to getMaxTextFieldLength() -
* CLOB_LENGTH)
*/
@Override
public int getMaxVARCHARLength() {
return 32672;
}
/**
* @return true if the database supports sequences
*/
@Override
public boolean supportsSequences() {
return true;
}
@Override
public String getSQLListOfSequences() {
return "SELECT SEQNAME FROM SYSCAT.SEQUENCES";
}
/**
* Check if a sequence exists.
*
* @param sequenceName
* The sequence to check
* @return The SQL to get the name of the sequence back from the databases data dictionary
*/
@Override
public String getSQLSequenceExists( String sequenceName ) {
return "SELECT * FROM SYSCAT.SEQUENCES WHERE SEQNAME = '" + sequenceName.toUpperCase() + "'";
}
/**
* Get the current value of a database sequence
*
* @param sequenceName
* The sequence to check
* @return The current value of a database sequence
*/
@Override
public String getSQLCurrentSequenceValue( String sequenceName ) {
return "SELECT PREVIOUS VALUE FOR " + sequenceName + " FROM SYSIBM.SYSDUMMY1";
}
/**
* Get the SQL to get the next value of a sequence. (Oracle only)
*
* @param sequenceName
* The sequence name
* @return the SQL to get the next value of a sequence. (Oracle only)
*/
@Override
public String getSQLNextSequenceValue( String sequenceName ) {
return "SELECT NEXT VALUE FOR " + sequenceName + " FROM SYSIBM.SYSDUMMY1";
}
/**
* @return true if the database supports the NOMAXVALUE sequence option. The default is false, AS/400 and DB2 support
* this.
*/
@Override
public boolean supportsSequenceNoMaxValueOption() {
return true;
}
}