generateChangeLog Task

Generates a changelog to re-create an existing database.

generateChangeLog task examples

<liquibase:generateChangeLog  classpathref="classpath">  
    <liquibase:database  driver="${driver.class}"  url="${jdbc.url}"  user="${jdbc.user}"  password="${jdbc.user}"/>  
    <liquibase:xml  outputfile="/path/to/output/changelog.xml"  encoding="UTF-8"/>  
</liquibase:generateChangeLog>

Generates a changelog file for the database in XML format.

<liquibase:generateChangeLog  classpathref="classpath">  
    <liquibase:database  driver="${driver.class}"  url="${jdbc.url}"  user="${jdbc.user}"  password="${jdbc.user}"/>  
    <liquibase:xml  outputfile="/path/to/output/changelog.xml"  encoding="UTF-8"/>  
    <liquibase:yaml  outputfile="/path/to/output/changelog.yaml"  encoding="UTF-8"/>  
</liquibase:generateChangeLog>

Generates the changelog in both XML and YAML format.

Parameters

Attribute	Description	Required
classpathref	A reference to the classpath used to run the task with.	No
databaseref	A reference to the database that Liquibase will connect to.	Yes, unless a nested `<database>` element is present.
promptOnNonLocalDatabase	If set to true a dialog box with warn you if you attempt to run the Liquibase against a database that is not on localhost	No; default is false.
outputFile	Deprecated: Where to save the generated changelog file.	No
driver	Deprecated: The name of the database driver to connect with.	No
url	Deprecated: The database URL.	No
username	Deprecated: The database username to connect with.	No
password	Deprecated: The password to use when connecting to the database.	No
defaultSchemaName	Deprecated: Schema read objects from.	No
currentDateTimeFunction	Deprecated: Overrides current date time function used in SQL. Useful for unsupported databases	No
databaseChangeLogTableName	Deprecated: Overrides the name of the DATABASECHANGELOG table to use Since Liquibase 1.9	No
databaseChangeLogLockTableName	Deprecated: Overrides the name of the DATABASECHANGELOGLOCK table to use Since Liquibase 1.9	No
logLevel	Deprecated: Specifies one of the following logging levels: debug, info, warning, severe, off. The default level is info.	No

Parameters Specified as Nested Elements

xml, yaml, json, or txt

This task is capable of generating changelog files in multiple formats. At least one of these elements is required.

Attribute	Description	Required
outputfile	The location to write the changelog file to.	Yes
encoding	The file encoding to use for the output file.	No. Defaults to system encoding

<liquibase:xml  outputfile="/path/to/output/changelog.xml"  encoding="UTF-8"/>

classpath

The classpath used to run the task with. Optional.

Database

Required unless a databaseref attribute is given. See database data type.

ChangeLogParameters

Optional. See changelog Property Substitution.