Liquibase Command futureRollbackCountSql

The futureRollbackCountSql command provided by Liquibase is an extension of futureRollbackSql, the difference is that futureRollbackCountSql will only show SQL query for the unexpected ChangeSet for rollback from the last, up to the count provided in the argument.

<?xml version="1.1" encoding="UTF-8" standalone="no"?>
<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog" xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext" xmlns:pro="http://www.liquibase.org/xml/ns/pro" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/pro http://www.liquibase.org/xml/ns/pro/liquibase-pro-latest.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd">
	<changeSet author="wesome" id="1692446190573-1">
		<createTable catalogName="appledb" tableName="apple">
			<column autoIncrement="true" name="apple_id" type="BIGINT">
				<constraints nullable="false" primaryKey="true" />
			</column>
			<column name="apple_name" type="VARCHAR(255)" />
			<column defaultValueComputed="CURRENT_TIMESTAMP" name="current_date_time" type="datetime" />
		</createTable>
		<rollback>
			<dropTable tableName="apple" />
		</rollback>
	</changeSet>
	<changeSet author="wesome" id="1692701200879-2">
		<insert catalogName="appledb" tableName="apple">
			<column name="apple_name" value="Fuji" />
			<column name="current_date_time" valueDate="now()" />
		</insert>
		<rollback>
			<delete tableName="apple">
				<where>
					apple_name = 'Fuji'
				</where>
			</delete>
		</rollback>
	</changeSet>
	<changeSet author="wesome" id="1692701200879-3">
		<insert catalogName="appledb" tableName="apple">
			<column name="apple_name" value="Gala" />
			<column name="current_date_time" valueDate="now()" />
		</insert>
		<rollback>
			<delete tableName="apple">
				<where>
					apple_name = 'Gala'
				</where>
			</delete>
		</rollback>
	</changeSet>
</databaseChangeLog>

liquibase.properties (update changeLog File file format with SQL, XML, YAML, JSON as per changelog.mysql.)

changeLogFile=changelog.mysql.xml
liquibase.command.url:jdbc:mysql://localhost:3306/appleDb?createDatabaseIfNotExist=true&autoReconnect=true&useSSL=false&allowPublicKeyRetrieval=true
liquibase.command.username : root
liquibase.command.password : rootroot

Run command liquibase update --count=2

The table is created with only the first 1 ChangeSet records, the same can be verified by running the query

SELECT * FROM appleDb.apple;

now to inspect the SQL query for only the last yet to be executed ChangeSet, run the command liquibase futureRollbackSql --count=1

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