Support rollback for formatted SQL changelogs

Fixes liquibase#361

src/it/addColumnWithRollbackSqlChangelog/pom.xml

@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file 
+    distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under 
+    the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may 
+    obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to 
+    in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF 
+    ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under 
+    the License. -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>@[email protected]</groupId>
+    <artifactId>liquibase-percona-it-addColumnWithRollbackSqlChangelog</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <name>my-app</name>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.liquibase</groupId>
+                <artifactId>liquibase-maven-plugin</artifactId>
+                <version>@liquibase.version@</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>@project.groupId@</groupId>
+                        <artifactId>@project.artifactId@</artifactId>
+                        <version>@project.version@</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>mysql</groupId>
+                        <artifactId>mysql-connector-java</artifactId>
+                        <version>@mysql.version@</version>
+                    </dependency>
+                </dependencies>
+                <configuration>
+                    <changeLogFile>test-changelog.sql</changeLogFile>
+                    <driver>com.mysql.jdbc.Driver</driver>
+                    <url>jdbc:mysql://@config_host@:@config_port@/@config_dbname@?useSSL=false&amp;allowPublicKeyRetrieval=true</url>
+                    <username>@config_user@</username>
+                    <password>@config_password@</password>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>update</id>
+                        <phase>pre-integration-test</phase>
+                        <goals>
+                            <goal>update</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>rollbackSQL</id>
+                        <phase>pre-integration-test</phase>
+                        <goals>
+                            <goal>rollbackSQL</goal>
+                        </goals>
+                        <configuration>
+                            <rollbackCount>3</rollbackCount>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>rollback</id>
+                        <phase>pre-integration-test</phase>
+                        <goals>
+                            <goal>rollback</goal>
+                        </goals>
+                        <configuration>
+                            <rollbackCount>3</rollbackCount>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

src/it/addColumnWithRollbackSqlChangelog/test-changelog.sql

@@ -0,0 +1,14 @@
+--liquibase formatted sql
+
+--changeset Alice:1
+--rollback DROP TABLE person;
+CREATE TABLE person (name VARCHAR(255) NOT NULL, CONSTRAINT PK_PERSON PRIMARY KEY (name));
+
+--changeset Alice:2
+--rollback ALTER TABLE person DROP COLUMN address;
+ALTER TABLE person ADD address VARCHAR(255) NULL;
+
+--changeset Alice:3
+--liquibasePercona:usePercona="false"
+--rollback ALTER TABLE person DROP COLUMN email;
+ALTER TABLE person ADD email VARCHAR(255) NULL;

src/it/addColumnWithRollbackSqlChangelog/verify.groovy

@@ -0,0 +1,42 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+File buildLog = new File( basedir, 'build.log' )
+assert buildLog.exists()
+def buildLogText = buildLog.text;
+
+// changeset 3: email has usePercona="false"
+assert buildLogText.contains("Rolling Back Changeset: test-changelog.sql::3::Alice")
+assert !buildLogText.contains("Executing: pt-online-schema-change --alter-foreign-keys-method=auto --nocheck-unique-key-change --alter=\"DROP COLUMN email\" --password=*** --execute h=${config_host},P=${config_port},u=${config_user},D=testdb,t=person");
+// changeset 2: address
+assert buildLogText.contains("Rolling Back Changeset: test-changelog.sql::2::Alice")
+assert buildLogText.contains("Executing: pt-online-schema-change --alter-foreign-keys-method=auto --nocheck-unique-key-change --alter=\"DROP COLUMN address\" --password=*** --execute h=${config_host},P=${config_port},u=${config_user},D=testdb,t=person");
+// changeset 1: table
+assert buildLogText.contains("Rolling Back Changeset: test-changelog.sql::1::Alice")
+
+
+File sql = new File( basedir, 'target/liquibase/migrate.sql' )
+assert sql.exists()
+def sqlText = sql.text;
+assert sqlText.contains("pt-online-schema-change")
+// changeset 3: email has usePercona="false"
+assert !sqlText.contains("--  pt-online-schema-change --alter-foreign-keys-method=auto --nocheck-unique-key-change --alter=\"DROP COLUMN email\" --password=*** --execute h=${config_host},P=${config_port},u=${config_user},D=testdb,t=person;");
+// changeset 2: address
+assert sqlText.contains("--  pt-online-schema-change --alter-foreign-keys-method=auto --nocheck-unique-key-change --alter=\"DROP COLUMN address\" --password=*** --execute h=${config_host},P=${config_port},u=${config_user},D=testdb,t=person;");
+assert !sqlText.contains("password=${config_password}")

src/main/java/liquibase/ext/percona/PerconaFormattedSqlChangeLogParser.java

@@ -57,14 +57,7 @@ public DatabaseChangeLog parse(String physicalChangeLogLocation, ChangeLogParame
 
             for (Change change : changeSet.getChanges()) {
                 RawSQLChange rawSQLChange = (RawSQLChange) change;
-                PerconaRawSQLChange perconaChange = new PerconaRawSQLChange();
-                perconaChange.setSql(rawSQLChange.getSql());
-                perconaChange.setSplitStatements(rawSQLChange.isSplitStatements());
-                perconaChange.setStripComments(rawSQLChange.isStripComments());
-                perconaChange.setEndDelimiter(rawSQLChange.getEndDelimiter());
-                perconaChange.setRerunnable(rawSQLChange.isRerunnable());
-                perconaChange.setComment(rawSQLChange.getComment());
-                perconaChange.setDbms(rawSQLChange.getDbms());
+                PerconaRawSQLChange perconaChange = convert(rawSQLChange);
                 perconaChangeSet.addChange(perconaChange);
 
                 String sql = perconaChange.getSql();
@@ -78,9 +71,34 @@ public DatabaseChangeLog parse(String physicalChangeLogLocation, ChangeLogParame
                     perconaChange.setPerconaOptions(perconaOptionsMatcher.group(1));
                 }
             }
+
+            for (Change change : changeSet.getRollback().getChanges()) {
+                RawSQLChange rawSQLChange = (RawSQLChange) change;
+                PerconaRawSQLChange rollbackChange = convert(rawSQLChange);
+
+                assert perconaChangeSet.getChanges().size() == 1;
+                PerconaRawSQLChange forwardChange = (PerconaRawSQLChange) perconaChangeSet.getChanges().get(0);
+                rollbackChange.setUsePercona(forwardChange.getUsePercona());
+                rollbackChange.setPerconaOptions(forwardChange.getPerconaOptions());
+
+                perconaChangeSet.getRollback().getChanges().add(rollbackChange);
+            }
+
             changeLog.getChangeSets().set(i, perconaChangeSet);
         }
 
         return changeLog;
     }
+
+    private static PerconaRawSQLChange convert(RawSQLChange rawSQLChange) {
+        PerconaRawSQLChange perconaChange = new PerconaRawSQLChange();
+        perconaChange.setSql(rawSQLChange.getSql());
+        perconaChange.setSplitStatements(rawSQLChange.isSplitStatements());
+        perconaChange.setStripComments(rawSQLChange.isStripComments());
+        perconaChange.setEndDelimiter(rawSQLChange.getEndDelimiter());
+        perconaChange.setRerunnable(rawSQLChange.isRerunnable());
+        perconaChange.setComment(rawSQLChange.getComment());
+        perconaChange.setDbms(rawSQLChange.getDbms());
+        return perconaChange;
+    }
 }

src/test/java/liquibase/ext/percona/ChangeLogParserTest.java

@@ -23,6 +23,7 @@
 
 import liquibase.change.Change;
 import liquibase.changelog.ChangeLogParameters;
+import liquibase.changelog.ChangeSet;
 import liquibase.changelog.DatabaseChangeLog;
 import liquibase.parser.ChangeLogParser;
 import liquibase.parser.ChangeLogParserFactory;
@@ -78,11 +79,27 @@ public void testReadLiquibaseUsePerconaFlagXML() throws Exception {
     public void testReadLiquibaseUsePerconaFlagSQL() throws Exception {
         DatabaseChangeLog changelog = loadChangeLog("test-changelog.sql");
         Assertions.assertEquals(3, changelog.getChangeSets().size());
-        Change change = changelog.getChangeSets().get(0).getChanges().get(0);
+
+        // changeset 1
+        ChangeSet changeSet = changelog.getChangeSets().get(0);
+        Change change = changeSet.getChanges().get(0);
         assertChange(change, PerconaRawSQLChange.class, null, null);
-        change = changelog.getChangeSets().get(1).getChanges().get(0);
+        Assertions.assertEquals(1, changeSet.getRollback().getChanges().size());
+        Change rollback = changeSet.getRollback().getChanges().get(0);
+        assertChange(rollback, PerconaRawSQLChange.class, null, null);
+
+        // changeset 2
+        changeSet = changelog.getChangeSets().get(1);
+        change = changeSet.getChanges().get(0);
         assertChange(change, PerconaRawSQLChange.class, Boolean.FALSE, null);
-        change = changelog.getChangeSets().get(2).getChanges().get(0);
+        rollback = changeSet.getRollback().getChanges().get(0);
+        assertChange(rollback, PerconaRawSQLChange.class, Boolean.FALSE, null);
+
+        // changeset 3
+        changeSet = changelog.getChangeSets().get(2);
+        change = changeSet.getChanges().get(0);
         assertChange(change, PerconaRawSQLChange.class, null, "--foo");
+        rollback = changeSet.getRollback().getChanges().get(0);
+        assertChange(rollback, PerconaRawSQLChange.class, null, "--foo");
     }
 }

src/test/resources/liquibase/ext/percona/changelog/test-changelog.sql

@@ -1,12 +1,15 @@
 --liquibase formatted sql
 
 --changeset Alice:1
+--rollback DROP TABLE person;
 CREATE TABLE person (name VARCHAR(255) NOT NULL, CONSTRAINT PK_PERSON PRIMARY KEY (name));
 
 --changeset Alice:2
 --liquibasePercona:usePercona="false"
+--rollback ALTER TABLE person DROP COLUMN address;
 ALTER TABLE person ADD address VARCHAR(255) NULL;
 
 --changeset Alice:3
 -- liquibasePercona:perconaOptions="--foo"
+--rollback ALTER TABLE person DROP COLUMN email;
 ALTER TABLE person ADD email VARCHAR(255) NULL;