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Oracle Extensions

Overview

Summary Following tags for Oralce which are not supported by Liquibase Core were added:
1. AddCheck
2. AddDeferredPrimaryKey
3. RenameTrigger
4. CreateMaterializedView
5. CreateTrigger
6. DisableConstraint
7. DropCheck
8. DropTrigger
9. EnableConstraint
10. EncapsulateTableWithView
11. LongUpdate
12. Merge
13. Truncate
14. DropMaterizedView
15. EnableTrigger
16. DisableTrigger
Current Version 0.1
Author Artur Kopacz, Damian Pezda, Łukasz Rejkowicz, Tomasz Wicherski
SVN Repository http://liquibase.jira.com/source/browse/CONTRIB/trunk/oracle-extensions
Supported Database Oracle

Usage

To use, simply include the oracle-extentions.jar file in your classpath.

Available Commands/Tags

Add Check

Adds a check constraint to an existing table.

Sample
<ora:addCheck tableName="person"
	condition="id between 0 and 5"
	disable="true"
	deferrable="true"
	initiallyDeferred="true"
/>
Available Attributes
tableName Name of the table to add check constraint to [required]
schemaName Name of the table schema
tablespace Specify the tablespace in which the check constraint is to be created
condition True/false expression [required]
constraintName Name of the check constraint
deferrable Is check deferrable
initiallyDeferred Is check initially deferred
disable Is check disabled
validate Is check validate
rely Is check rely
Automatic Rollback Support : YES

Add Deffered Primary Key

Adds creates a deferred primary key out of an existing column or set of columns.

Sample
<ora:addDeferredPrimaryKey
	tableName="AddDeferredPrimaryKeyTest"
	columnNames="id"
	deferrable="true"
	initiallyDeferred="true"
	constraintName="PK_AddDeferredPrimaryKeyTest"
/>
Available Attributes
tableName Name of the table to create the primary key on [required]
schemaName Name of the table schema
columnNames Name of the column(s) (comma separated if multiple) to create the primary key on [required]
constraintName Name of primary key constraint [required]
deferrable Set DEFERRABLE (deferrable="true") to indicate that in subsequent transactions you can use the SET CONSTRAINT clause to defer checking of this constraint until after the transaction is committed
initiallyDeferred Set INITIALLY DEFERRED (initiallyDeferred="true") to indicate that Oracle should check this constraint at the end of subsequent transactions
Automatic Rollback Support : YES

RenameTrigger

Can disable, enable or rename trigger

Sample
<ora:renameTrigger triggerName="myTrigger" newName="RenamedMyTrigger"/>
Available Attributes
triggerName Name of the trigger [required]
schemaName Name of the schema
newName New name of the trigger [required]
Automatic Rollback Support : NO

CreateMaterializedView

Creates new materialized view

Sample
<ora:createMaterializedView subquery="select * from Table1" viewName="myView"/>
Available Attributes
viewName Name of the view [required]
subquery Oracle Database executes this subquery and places the results in the materialized view [required]
columnAliases You can specify a column alias for each column of the materialized view
objectType The objectType clause lets you explicitly create an object materialized view of type objectType.
reducedPrecision Specify to authorize the loss of precision that will result if the precision of the table or materialized view columns do not exactly match the precision returned by subquery, or to require that the precision of the table or materialized view columns match exactly the precision returned by subquery, or the create operation will fail
usingIndex Specify "no" to suppress the creation of the default index
tableSpace Specify the tablespace in which the materialized view is to be created
forUpdate Specify FOR UPDATE to allow a subquery, primary key, object, or rowid materialized view to be updated
queryRewrite Specify "enable" to enable the materialized view for query rewrite or "disable" to indicate that the materialized view is not eligible for use by query rewrite
Automatic Rollback Support : YES

CreateTrigger

Creates new trigger

Sample
<ora:createTrigger
	afterBeforeInsteadOf="before"
	procedure="DECLARE v_username varchar2(10); BEGIN SELECT pierwsza INTO v_username FROM TriggerTest; :new.created_by := v_username; END;"
	triggerName="myTrigger"
	tableName="TriggerTest"
	insert="true"
	forEachRow="true"
/>
Available Attributes
triggerName Name of the trigger [required]
afterBeforeInsteadOf Specify "before" to cause the database to fire the trigger before executing the triggering event
Specify "after" to cause the database to fire the trigger after executing the triggering event
Specify "insteadOf" to cause Oracle Database to fire the trigger instead of executing the triggering event
[required]
procedure Specify the PL/SQL block that Oracle Database executes to fire the trigger or call a stored procedure rather than specifying the trigger code inline as a PL/SQL block [required]
schemaName Name of the schema
replace Re-create the trigger if it already exists
delete Specify DELETE if you want the database to fire the trigger whenever a DELETE statement removes a row from the table or removes an element from a nested table
insert Specify INSERT if you want the database to fire the trigger whenever an INSERT statement adds a row to a table or adds an element to a nested table.
update Specify UPDATE if you want the database to fire the trigger whenever an UPDATE statement changes a value in any column of the table or nested table.
updateOf Specify if you want the database to fire the trigger whenever an UPDATE statement changes a value in one of the columns specified in columnNames.
tableName Name of the table
columnNames Name of columns required to updateOf
whenCondition Specify the trigger condition, which is a SQL condition that must be satisfied for the database to fire the trigger
nestedTableColumn Specify the nested_table_column of a view upon which the trigger is being defined.
viewName Name of the view
forEachRow Specify to designate the trigger as a row trigger
Automatic Rollback Support : YES

Disable Constraint

Disables existing constraint.

Sample
<ora:disableConstraint tableName="test" constraintName="tom_check"/>
AvailableAttributes
constraintName Name of the constraint to disable [required]
tableName Name of the table to disable constraint to [required]
schemaName Name of the table schema
tablespace Specify the tablespace in which the constraint is to be disabled
Automatic Rollback Support : YES

Drop Check

Drops a check constraint from an existing table.

Sample
<ora:dropCheck tableName="test" constraintName="tom_check"/>
AvailableAttributes
constraintName Name of the constraint to drop [required]
tableName Name of the table to drop check constraint to [required]
schemaName Name of the table schema
tablespace Specify the tablespace in which the check constraint is to be dropped
Automatic Rollback Support : NO

DropTrigger

Removing the specific trigger

Sample
<ora:dropTrigger triggerName="myTrigger"/>

Available Attributes

triggerName Name of the trigger [required]
schemaName Name of the schema
Automatic Rollback Support : NO

Enable Constraint

Enables existing constraint.

Sample
<ora:enableConstraint tableName="test" constraintName="tom_check"/>
AvailableAttributes
constraintName Name of the constraint to enable [required]
tableName Name of the table to enable constraint to [required]
schemaName Name of the table schema
tablespace Specify the tablespace in which the constraint is to be enabled
Automatic Rollback Support : YES

EncapsulateTableWithView

Renames table named 'tableName' to 'TtableName' and creates view named 'tableName'.

Sample
<ora:encapsulateTableWithView tableName="person"/>
Available Attributes
tableName Name of the table to encapsulate [required]
schemaName Name of the table schema
Automatic Rollback Support : YES

LongUpdate

Performs long-running update in time intervals

Sample
<ora:longUpdate commitInterval="5" sleepSeconds="1" updateSql="UPDATE LongUpdateTest SET name='checked' where name='test'" />
Available Attributes
commitInterval Number of updated rows in one commit [required]
sleepSeconds Time between commits [required]
updateSql Update procedure [required]
Automatic Rollback Support : NO

Merge

Selects rows from source table or view for update or insertion into a target table or view. You can specify conditions to determine whether to update or insert into the target table or view.
(from Oracle Database SQL Reference)

Example
<ora:merge targetTableName="myTable2 m"
	sourceTableName="myTable d"
	onCondition="m.pid=d.pid"
	insertColumnsValueList="d.pid,d.sales,'OLD'"
	updateList="m.sales=m.sales+d.sales,m.status=d.status"
	deleteCondition="m.status='OBS'"
/>
Available Attributes
sourceTableName Name of the source table [required]
sourceSchemaName Name of the source table schema
targetTableName Name of the target table [required]
targetSchemaName Name of the target table schema
onCondition OnCondition clause [required]
updateCondition UpdateCondition clause for update statement
insertCondition InsertCondition clause for insert statement
deleteCondition DeleteCondition clause for delete statement
updateList 'name=value' list separated by ',' for update statement
insertColumnsNameList A list of columns names for insert statement
insertColumnsValueList A list of columns values for insert statement
Automatic Rollback Support : NO

Truncate

Truncates all data from an existing table or cluster.

Sample
<ora:truncate tableName="truncatetest" purgeMaterializedViewLog="true" reuseStorage="true"/>
Available Attributes
tableName Name of the table to truncate
clusterName Name of the cluster to truncate
schemaName Name of the table/cluster schema
purgeMaterializedViewLog Whether a materialized view log defined on the table is to be purged when the table is truncated (from Oracle Database SQL Reference).
reuseStorage Retain the space from the deleted rows allocated to the table or cluster (from Oracle Database SQL Reference).
Automatic Rollback Support : NO

DropMaterializedView

Removing the specific materialized view

Sample
<ora:dropMaterializedView viewName="myView"/>

Available Attributes

viewName Name of the view [required]
schemaName Name of the schema
Automatic Rollback Support : NO

EnableTrigger

Can enable trigger

Sample
<ora:enableTrigger triggerName="myTrigger"/>
Available Attributes
triggerName Name of the trigger [required]
schemaName Name of the schema
Automatic Rollback Support : YES

DisableTrigger

Can disable trigger

Sample
<ora:disableTrigger triggerName="myTrigger"/>
Available Attributes
triggerName Name of the trigger [required]
schemaName Name of the schema
Automatic Rollback Support : YES

SplitTable

Split table on two tables (with surrogate key only).

Sample
<changeSet author="Tomek" id="0">
   <createTable tableName="TABLE1">
      <column name="one" type="integer"></column>
      <column name="two" type="varchar(10)"></column>
      <column name="three" type="number"></column>
      <column name="four" type="number"></column>
   </createTable>
</changeSet>

<changeSet author="tomek" id="1" context="transition">
   <ora:splitTable primaryKeyColumnName="three_id"
   splitTableName="TABLE1"
   newTableName="TABLE2"
   columnNameList="three,four"/>
</changeSet>
Available Attributes
splitTableName Name of the split table [required]
splitTableSchemaName Name of the split table schema
newTableName Name of the new table [required]
newTableSchemaName Name of the new table schema
columnNameList List of column to move to the second table [required]
primaryKeyColumnName Name of primary key column in new table (only surrogate key) [required]
Automatic Rollback Support : NO
Rolling Upgrade Support : YES

splitTable tag supports rolling upgrades through changeSet contexts. There are 3 available contexts:

  • basic - no context, refeactoring without rolling upgrade
  • transition - move database to transition state (two version of aplication work on the same database)
  • resulting - move databese to resulting (final) state from transition state
WARNING
  • Liquibase 2.0 doesn't support numeric precission(e.g. NUMBER(10,3)).
  • createTrigger extension is needed.
NOTE

"rolling upgrade" - the process of incrementally taking down parts of the system for upgrade, without affecting the overall functionality. (http://en.wikipedia.org/wiki/Downtime)

Files

  Name Size Creator Creation Date Comment  
Java Source liquibase-extensions-1.0.jar 66 kB Arko Aug 31, 2009 07:38    
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