I am trying to migrate from oracle db to mysql or postgres using Liquibas. I have generated the sql file using Liquibase but, the syntax is not right there is a lot of issue with the generated sql. If anyone has any solution please do let me know thank you.
The best approach is to use the generateChangeLog function to create an XML changeSet description of your oracle database. Go through the generated changelog to make sure everything expected is there, and make any changes to the file as needed such as data type changes.
Once the changelog is correct, you can run the XML changelog directly against your mysql or postgresql database or use updateSQL to generate the SQL liquibase would use. Liquibase will create the correct database-specific SQL when it runs a changelog against a given database.
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I have some SQL scripts that I'd like to convert into Liquibase XML changelogs. Is this possible?
What exactly do you mean by "convert into changelogs"?
If you don't need cross-database compatibility, you could just use the sql executor:
<changeSet id="testing123" author="me">
<sql splitStatements="false">
<!-- all your existing SQL paste here -->
</sql>
</changeSet>
The splitStatements=false setting will make sure the complete SQL will be sent in one command; otherwise, Liquibase would split it into multiple commands at semicolons.
You could use a detour via a database. Apply your script to a database of choice (that is supported by liquibase). Then use generateChangeLog to generate the changelogs in xml from the database. You will have the XML changelog generated for all the SQL scripts you have applied to your database.
Alternatively, have a look at answer on this SO post.
I made a relational model in Oracle SQL Developer and I want to make tables in MySQL Workbench. I generated the DDL script in SQL Developer and copied it in MySQL Workbench. I found out that the copied queries are not in correct syntax. I tried different options in SQL Developer to generate script and none of them were in MySQL syntax.
Is there a way to generate DDL script from a model, which is made in SQL Developer, for MySQL?
There is no straight query generation for MySQL in oracle SQL developer. You should use such a sites for your purpose to convert them into MySQL syntax or use tools for automatic converting.
I found 2 issues per se when I ran the updateSQL commandline in Liquibase
The last statement in Liquibase updateSQL output viz Insert into DBCHANGELOG table does not commit automatically when the sql is run via sqlplus commandline
As a result of this, though the changeset gets executed, the DBCHANGELOG table does not have the insert statement to record it. So when I run the updateSQL once again, the last changeset is once again created in the SQL output which is incorrect.
Liquibase does not validate / check syntax errors in SQL.
As a result of this, even if the changeset SQL fails, the insert to DBChangeLog table for the changeset succeeds which is incorrect. Is there a way that the insert statement following the changeset be stopped / failed if the changeset SQL actually failed ?
Any help is greatly appreciated... we are this close to getting Liquibase implemented... !!
To answer the question in your subject line, no, Liquibase cannot validate the SQL. Liquibase supports many different databases, and each has different SQL syntax.
If you can, stop using the SQL generated by updateSQL to actually do the updates, and use Liquibase itself to do the updates. That way Liquibase can detect errors and behave more properly. I recommend that if DBAs are scared of Liquibase touching the database that teams use the generateSQL as a pre-check to see what Liquibase will do, but let Liquibase do its job.
I also find best practice of Liquibase is not to use a SQL script but to manually write the Liquibase XML file for the change.
I've tried using the ExecuteCommand tag to lunch sqlplus or sqlcmd (as I know my target database) and it has a bug which as for now it is closed?! (but this is open source, so I can't complain :) )
Having said that, I found that working on XML to specify the changes causes many other challenges, for example:
1. Making sure that every change was included in the changelog xml file. I've heard many organizations who forget to add the file to the changelog.
2. Making sure the file for the specific change is always in sync with the file-based version control. Imagine what will happen if it doesn't - which happens to many of my customers...
3. Wasted time spent on merging changelogs between different environments (branches, UAT - critical fixes, sandboxes, etc...)
I'm looking to automatically generate an XML version of a database schema from SQL (Postgres) DDL.
Are there any tools to help with getting from the DDL to XML?
xml2ddl claims to do this, but it fails to connect and seems unsupported since 2005.
You can use the built-in table_to_xmlschema etc.; see http://www.postgresql.org/docs/current/static/functions-xml.html#FUNCTIONS-XML-MAPPING.
Things that spring immediately to my mind:
Liquibase
Schemaspy
SQL Workbench's WbSchemaReport
They don't use a DDL (SQL) script as input but require a database connection.
Have you also researched DbUnit?
Anyone have a PL-SQL statement that i can use to generate database & tables schema for specific database on Oracle 10g? I need the schema in .sql file and if possible compatible with ANSI-92/99 sql implementation, so i can use the generated .sql directly on sql server 2005.
Already heard about exp/imp, but it seems generated dump file, what i need just a simple ddl on .sql file.
Thanks
You could try:
select dbms_metadata.get_ddl('TABLE',table_name,owner)
from dba_tables where owner='schema name';
It returns longs, so you may want to play with the long buffer.
More about dbms_metadata here: http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_metada.htm
If you just need to dump your schema, this free package does a very nice job. We use it in daily production.
http://sourceforge.net/projects/cx-oracletools
If you need to convert from Oracle to SQL Server, this software might do a better job. We've used it to convert between Oracle, MySql, and Postgreqsql.
http://www.spectralcore.com/fullconvert
I wrote oraddlscript which calls dbms_metadata.get_ddl (Pop's answer) for each database object owned by a user and writes the DDL to a file.
Update: Answered comment
Greetings, I'd recomend using Oracle SQL Developer Data Modeler since it's from Oracle, it can read the DDL information directly from the Data Dictionary. It creates an ERD and then you can produce DDL for SQL Server 2000/2005, some versions of DB2 and Oracle 9i/10g/11g.