update-sql

The update-sql command is a helper command that allows you to inspect the SQL Liquibase will run while using the update command.

Uses

The update-sql command is used when you want to inspect the raw SQL before running the update command, so you can correct any issues that may arise before running the command. Liquibase uses the raw SQL to apply database changes you have added to the changelog file.

Running the update-sql command

To run the update-sql command, specify the driver, classpath, and URL in the Liquibase properties file. For more information, see Specifying Properties in a Connection Profile. You can also specify properties from the command line.

Run the update-sql command:

liquibase --changelog-file=sample.changelog.xml update-sql

Note: Enter the name of the changelog you want to use in place of sample.changelog.xml.

update-sql global attributes

Attribute	Definition	Requirement
--changelog-file *	Specifies the root changelog	Required
--url	Specifies the JDBC database connection URL	Required
--username	Specifies the database username	Required
--password	Specifies the database password	Required
--output-file **	Specifies the file path to where the update SQL will be written	Optional

* Liquibase checks the changelog and any nested changelogs for the definitions of the changesets to update.

* * If not specified, update SQL output goes to STDOUT.

Note: The username and password attributes are not required for connections and systems which use alternate means of authentication.

update-sql command attributes

Attribute	Definition	Requirement
--labels	Tags you can add to changesets to determine which changesets in the changelog to evaluate based on their labels	Optional
--contexts	Expressions you can add to changesets to determine which changesets in the changelog to evaluate based on their contexts	Optional