tagExists <tag string> command

The tagExists <tag string> command checks whether the tag you specify already exists in your database.

Uses

The tagExists <tag string> command is typically used to identify whether the specified tag exists in the database or specifically in the DATABASECHANGELOG table. Running the tagExists <tag string> command checks for the tag and, based on whether it exists or not, provides the appropriate output.

Running the tagExists <tag string> command

To run the tagExists <tag string> command, you need to specify your driver, class path, URL, and user authentication information in your liquibase.properties file. You can also specify these properties in your command line.

Then run the tagExists <tag string> command:

liquibase --changeLogFile=communityOnly.xml tagExists myTag

Note: Enter the name of the changelog and the tag that you want to use in place of communityOnly.xml and myTag.

tagExists <tag string> global attributes

Attribute	Definition	Requirement
--changeLogFile	The root changelog	Required
--url	The JDBC database connection URL	Required
--username	The database username	Required
--password	The database password	Required

tagExists <tag string> command attributes

Attribute	Definition	Requirement
<tag>	The tag you can add to changesets to determine which changesets in the changelog to evaluate based on their tags.	Required