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Changelog. With Liquibase, you use a text-based changelog file to sequentially list all changes made to your database. This ledger helps Liquibase audit your database and execute any changes that are not yet applied. You can store and version your changelog in any source control tool.
The generate-changelog command is typically used when you want to capture the current state of a database, then apply those changes to any number of databases. This is typically only done when a project has an existing database, but hasn't used Liquibase before.
You can use attribute s in your Changelog and in an individual Changeset to complete the following tasks: Reference other changelog s from within a changelog. Break up your primary changelog into more manageable pieces. Specify when, how, and under what conditions to run changes in a changeset.
Liquibase Concepts. Native SQL or Modeled Changesets ( XML, YAML, JSON) Changelogs, Changesets, and Change Types. Preconditions. Property substitution. Labels and Contexts. Key Commands. update, rollback, status, snapshot, diff, and generate changelog commands. Command Parameters.
10 de sept. de 2010 · Esta funcionalidad de Liquibase es muy útil cuando empezamos a trabajar con una base de datos que ya tiene creadas una serie de tablas. De tal manera que podremos generar nuestro changelogs.xml a partir del modelo de datos existente.
Like other file types, you can use as many formatted SQL changelog s as your database needs. Note: When creating an SQL changelog file with the generate-changelog and diff-changelog commands, add your database type name when you specify the changelog file. See the example below.
By running liquibase update, your database now matches the desired database state as defined by the changelog script. The DATABASECHANGELOG and DATABASECHANGELOGLOCK tables are liquibase-metadata tables, the COMPANY and PERSON tables were created by the changelog.
