SELECT from MySQL, INSERT into Oracle
Hallo,
I am new to Java.
My task is to collect data from about 30 tables inside MySQL database and then insert it to similar tables in Oracle.
Script should copy data one a day, during the night.
Number of rows in each table is about 30,000.
MySQL version 5.1
Oracle version 11.1.7
Both of them are installed on really fast servers.
The way i would do it is:
1. connect to MySQL
2. connect to Oracle
3. select data from MySQL table and insert it to Oracle table.
repeat this step for each table
More precise about SELECT and INSERT:
handle_one = "SELECT a, b, c FROM mysql_table1";
while(handle_one is true)
INSERT a, b, c INTO oracle_table1;
4. close MySQL connection
5. close Oracle connection
Is it best way?
Best Regards
slk
slkLinuxUser wrote:
Script should copy data one a day, during the night.
Number of rows in each table is about 30,000.There are variations on the above depending on what the above two statements mean.
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at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11569
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11569
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11569
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11569
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11569
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11569
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11569
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11569
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11569
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11569
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11569
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11569
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **Hello Folks,
I m trying to migrate my DB from mysql 5 to Oracle 10g .
I m meeting with some issues.
1) My table data are missing.
2) My foreign key indexing is missed.
Any idea why so?
This is a portion of Error log:
** Started : Wed Dec 20 13:06:56 GMT+05:30 2006
** Workbench Repository : Oracle Database 10g Enterprise Edition Release 10.1.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options
Repository Connection URL: jdbc:oracle:thin:@192.168.0.2:1521:tpss10g
** The following plugins are installed:
** MySQL 3.22/3.23 Plugin, Production Release 10.1.0.4.1
** MySQL 4.X Plugin, Production Release 10.1.0.4.1
** MySQL 5.X Plugin, Beta Release for 10.1.0.4.0
** Active Plugin : MySQL5
EXCEPTION : MySQLSourceModelMap._mapforeignKeys(): nios.root.order_rejection_notice_ibfk_1; Referenced schema not found.
EXCEPTION : MySQLSourceModelMap._mapforeignKeys(): nios.root.trading_partner_2_sm_link_ibfk_2; Referenced schema not found.
java.lang.OutOfMemoryError
java.lang.OutOfMemoryError
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 12173
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 12173
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 12173
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11823
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11823
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11823
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 12152
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 12152
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 12152
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11572
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11572
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11572
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11693
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11693
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11693
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11569
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11569
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11569
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11569
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11569
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11569
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11569
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11569
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11569
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION **
at com.mysql.jdbc.Connection.execSQL(Connection.java:2312)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
java.sql.SQLException: Error during query: Unexpected Exception: java.lang.ArrayIndexOutOfBoundsException message given: 11569
Nested Stack Trace:
** BEGIN NESTED EXCEPTION **
java.lang.ArrayIndexOutOfBoundsException
MESSAGE: 11569
STACKTRACE:
java.lang.ArrayIndexOutOfBoundsException: 11569
at com.mysql.jdbc.Buffer.readFieldLength(Buffer.java:246)
at com.mysql.jdbc.Buffer.fastSkipLenString(Buffer.java:107)
at com.mysql.jdbc.MysqlIO.unpackField(MysqlIO.java:472)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:285)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1326)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2225)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163)
at oracle.mtg.migrationServer.LoadTableData._migrateTableData(LoadTableData.java:563)
at oracle.mtg.migrationServer.LoadTableData.run(LoadTableData.java:326)
at oracle.mtg.migration.WorkerThread.run(Worker.java:268)
** END NESTED EXCEPTION ** -
Convert from mysql db to oracle
hi all,
i want to convert data from mysql database to oracle database.
what kind of mechanism i want to use?
if any mechanism like DTS in SQLserver is there to covert?Hi,
We did mysql to oracle migration some time back and played with workbench tool and many other softwares available.
However our experience was not so good with these tools, each tool had its own limitation and was not able to migrate 100% data. Even the speed of migration was too slow which would have violated our production SLAs.
So after spending a month with these tools we finally decided to create our own scripts for data migration. We used tools like TOAD and SQL Yok to create the DDL for the tables and other DB objects.
For the data migration we downloaded the mysql data in flat files and used sql loader to upload the same data in oracle. Even if this was a time consuming activity but this resulted in 100% data migration with no record getting failed and the time taken for this activity was around 6 Hrs in comparison to time of 24-28 Hrs that the workbench tool took.
Amar -
"Create Table from select Query" Vs "Insert into"
Hi
Schenaio:
My Select Query returns more than 10 million records, these records needs to be inserted into another table.
Approach 1:
I created table called TABLE1, and inserted the records using INSERT statement as a batch (batch size is 5000).
Approach 2:
I create table like,
CREATE TABLE TABLE1 AS <SELECT QUERY>
Here Apporach-1 took almost 40 minutes to complete the insert but Approach-2 took only 6 minutes.
If anybody knows why it is? And is there any way to improve the performance of Approach-1?.
Thanks
NidhiMost "batch" methods execute the same query multiple times. Row filtering is done after the rows are fetched from the source. The process of fetching all the rows could be a FullTableScan.
Therefore, a FullTableScan is executed for each batch of 5000 rows.
However, your query and batch definitions may well be different. We haven't seen the query and the execution plan.
Another point : How are you "filtering" the rows (i.e the second execution inserts rows 5001 to 10000 and does not attempt to reinsert rows 1 to 5000) ?
What is the overhead imposed by the filter ? (does the third execution have to exclude rows 1 to 10000 and inserts rows 10001 to 15000 and so on)
Hemant K Chitale
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