Sql server to Oracle migration using java

Question

I am doing a project in which i need to create a java application which migrates sql server(2000) db to oracle..kindly help me out

Answer 1

Thanks for your help..i do not want any third party
components..i am almost done with the tables
migration and am trying to figure out about
procedures..here is a code which does migrate
tables...hope it helps you too!
* Copyright Isocra Ltd 2004
* You can use, modify and freely distribute this file
as long as you credit Isocra Ltd.
* There is no explicit or implied guarantee of
functionality associated with this file, use it at
your own risk.
package com.isocra.util;
import java.sql.DatabaseMetaData;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.PreparedStatement;
import java.sql.ResultSetMetaData;
import java.util.Properties;
import java.io.FileInputStream;
import java.io.IOException;
* This class connects to a database and dumps all
the tables and contents out to stdout in the form
of
* a set of SQL executable statements
ublic class db2sql {
/** Dump the whole database to an SQL string */
public static String dumpDB(Properties props) {
String driverClassName =
props.getProperty("driver.class");
String driverURL =
props.getProperty("driver.url");
// Default to not having a quote character
String columnNameQuote =
props.getProperty("columnName.quoteChar", "");
DatabaseMetaData dbMetaData = null;
Connection dbConn = null;
try {
Class.forName(driverClassName);
dbConn =
DriverManager.getConnection(driverURL, props);
dbMetaData = dbConn.getMetaData();
catch( Exception e ) {
System.err.println("Unable to connect to
database: "+e);
return null;
try {
StringBuffer result = new StringBuffer();
String catalog =
props.getProperty("catalog");
String schema =
props.getProperty("schemaPattern");
String tables =
props.getProperty("tableName");
ResultSet rs =
dbMetaData.getTables(catalog, schema, tables,
null);
if (! rs.next()) {
System.err.println("Unable to find any tables
matching: catalog="+catalog+" schema="+schema+"
tables="+tables);
rs.close();
lse {
// Right, we have some tables, so we
can go to work.
// the details we have are
// TABLE_CAT String => table catalog (may be null)
// TABLE_SCHEM String => table schema
(may be null)
// TABLE_NAME String => table name
// TABLE_TYPE String => table type. Typical types
are "TABLE", "VIEW", "SYSTEM TABLE", "GLOBAL
TEMPORARY", "LOCAL TEMPORARY", "ALIAS", "SYNONYM".
// REMARKS String => explanatory
comment on the table
// TYPE_CAT String => the types
catalog (may be null)
// TYPE_SCHEM String => the types
schema (may be null)
// TYPE_NAME String => type name (may
be null)
// SELF_REFERENCING_COL_NAME String
=> name of the designated "identifier" column of a
typed table (may be null)
// REF_GENERATION String => specifies
how values in SELF_REFERENCING_COL_NAME are created.
Values are "SYSTEM", "USER", "DERIVED". (may be
null)
// We will ignore the schema and
stuff, because people might want to import it
somewhere else
// We will also ignore any tables
that aren't of type TABLE for now.
// We use a do-while because we've
already caled rs.next to see if there are any rows
do {
String tableName = rs.getString("TABLE_NAME");
String tableType =
rs.getString("TABLE_TYPE");
if
("TABLE".equalsIgnoreCase(tableType)) {
result.append("\n\n--
"+tableName);
result.append("\nCREATE TABLE
"+tableName+" (\n");
ResultSet tableMetaData =
dbMetaData.getColumns(null, null, tableName, "%");
boolean firstLine = true;
while (tableMetaData.next()) {
if (firstLine) {
firstLine = false;
} else {
// If we're not the first line, then finish
the previous line with a comma
result.append(",\n");
String columnName =
tableMetaData.getString("COLUMN_NAME");
String columnType =
tableMetaData.getString("TYPE_NAME");
// WARNING: this may give
daft answers for some types on some databases (eg
JDBC-ODBC link)
int columnSize =
tableMetaData.getInt("COLUMN_SIZE");
String nullable =
tableMetaData.getString("IS_NULLABLE");
String nullString =
"NULL";
if
("NO".equalsIgnoreCase(nullable)) {
nullString = "NOT
NULL";
result.append("
"+columnNameQuote+columnName+columnNameQuote+"
"+columnType+" ("+columnSize+")"+" "+nullString);
tableMetaData.close();
// Now we need to put the
primary key constraint
try {
ResultSet primaryKeys =
dbMetaData.getPrimaryKeys(catalog, schema,
tableName);
// What we might get:
// TABLE_CAT String => table catalog (may be null)
// TABLE_SCHEM String =>
table schema (may be null)
// TABLE_NAME String =>
table name
// COLUMN_NAME String =>
column name
// KEY_SEQ short =>
sequence number within primary key
// PK_NAME String =>
primary key name (may be null)
String primaryKeyName =
null;
StringBuffer
primaryKeyColumns = new StringBuffer();
while
(primaryKeys.next()) {
String thisKeyName =
primaryKeys.getString("PK_NAME");
if ((thisKeyName !=
null && primaryKeyName == null)
||
(thisKeyName == null && primaryKeyName != null)
||
(thisKeyName != null && !
thisKeyName.equals(primaryKeyName))
||
(primaryKeyName != null && !
primaryKeyName.equals(thisKeyName))) {
// the keynames
aren't the same, so output all that we have so far
(if anything)
// and start a
new primary key entry
if
(primaryKeyColumns.length() > 0) {
// There's
something to output
esult.append(",\n PRIMARY KEY ");
if
(primaryKeyName != null) {
result.append(primaryKeyName); }
esult.append("("+primaryKeyColumns.toString()+")");
// Start again with the new name
primaryKeyColumns
= new StringBuffer();
primaryKeyName =
thisKeyName;
// Now append the column
if
(primaryKeyColumns.length() > 0) {
rimaryKeyColumns.append(", ");
primaryKeyColumns.append(primaryKeys.getString("COLUMN
_NAME"));
if (primaryKeyColumns.length() > 0) {
// There's something
to output
result.append(",\n
PRIMARY KEY ");
if (primaryKeyName !=
null) { result.append(primaryKeyName); }
result.append("
("+primaryKeyColumns.toString()+")");
tch (SQLException e) {
// NB you will get this
exception with the JDBC-ODBC link because it says
// [Microsoft][ODBC
Driver Manager] Driver does not support this
function
ystem.err.println("Unable to get primary keys for
table "+tableName+" because "+e);
result.append("\n);\n");
// Right, we have a table, so
we can go and dump it
dumpTable(dbConn, result,
tableName);
hile (rs.next());
rs.close();
dbConn.close();
return result.toString();
} catch (SQLException e) {
e.printStackTrace(); //To change body of catch
statement use Options | File Templates.
return null;
/** dump this particular table to the string
buffer */
private static void dumpTable(Connection dbConn,
StringBuffer result, String tableName) {
try {
// First we output the create table stuff
PreparedStatement stmt =
dbConn.prepareStatement("SELECT * FROM "+tableName);
ResultSet rs = stmt.executeQuery();
ResultSetMetaData metaData = rs.getMetaData();
int columnCount =
metaData.getColumnCount();
// Now we can output the actual data
result.append("\n\n-- Data for "+tableName+"\n");
while (rs.next()) {
result.append("INSERT INTO "+tableName+" VALUES
for (int i=0; i<columnCount; i++) {
if (i > 0) {
result.append(", ");
Object value = rs.getObject(i+1);
if (value == null) {
result.append("NULL");
lse {
String outputValue =
value.toString();
outputValue =
outputValue.replaceAll("'","\\'");
esult.append("'"+outputValue+"'");
result.append(");\n");
rs.close();
stmt.close();
} catch (SQLException e) {
System.err.println("Unable to dump table
"+tableName+" because: "+e);
/** Main method takes arguments for connection to
JDBC etc. */
public static void main(String[] args) {
if (args.length != 1) {
System.err.println("usage: db2sql <property
file>");
// Right so there's one argument, we assume it's a
property file
// so lets open it
Properties props = new Properties();
try {
props.load(new FileInputStream(args[0]));
System.out.println(dumpDB(props));
} catch (IOException e) {
System.err.println("Unable to open
property file: "+args[0]+" exception: "+e);
}hi,
Thanks i used your coding and it works well...
i also used other thing i inserting the queries and values in another schema with primary and foreign keys.. it works well..
but problem is i cannot retrieve the unique constraint and other check constraint..
i cannot insert it..
and also i cannot create table in order i create the original..
because the retrieve query s values display based on ascending order i want display query in creation time...
because when i foreign keys .. the references in available before i create the table..that means a(table name) followed b(table name) .. a(table name) has contain foreign key of b(table name) .. but b (table name) not yet to create .. is possible.. to retrieve based creation time...