如何使用 liquibase 和 mysql 修复 SQL 语法错误来创建触发器

Question

我正在为 MySQL 数据库设置第一个 liquibase maven 项目。在创建触发器之前一切顺利。

我认为这是 liquibase 的问题，JDBC 没有正确处理多重语句 SQL，但我不知道我遗漏了什么。

这是我的 pom 依赖关系

    <dependency>
      <groupId>org.liquibase</groupId>
      <artifactId>liquibase-parent</artifactId>
      <version>3.5.3</version>
      <type>pom</type>
    </dependency>

    <dependency>
      <groupId>org.liquibase</groupId>
      <artifactId>liquibase-core</artifactId>
      <version>3.5.3</version>
    </dependency>

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.46</version>
    </dependency>

    <dependency>
      <groupId>org.liquibase</groupId>
      <artifactId>liquibase-maven-plugin</artifactId>
      <version>3.6.3</version>
    </dependency>

这是我的 liquibase 包含文件

<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                   xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.0.xsd">

  <changeSet id="event_horizon_1_0_0" author="lmtyler" dbms="mysql">
    <sql>
      drop trigger if exists ai_event_approval;
    </sql>
  </changeSet>

  <changeSet id="event_horizon_1_0_1" author="lmtyler" dbms="mysql">
    <sqlFile splitStatements="false" stripComments="false" endDelimiter="DONE" path="01__ai_event_approval.sql" relativeToChangelogFile="true" />
  </changeSet>

</databaseChangeLog>

这是我的 sql 文件

CREATE DEFINER ='evclient'@'%' TRIGGER ai_event_approval
    AFTER INSERT
    ON event_approval
    FOR EACH row
begin
    insert into event_approval_log (rowAction,
                                    actionTs,
                                    event,
                                    requestorEmail,
                                    requestReason,
                                    statusType,
                                    approverUserId,
                                    approverReason,
                                    lastChangTs)
        values ('I',
                current_timestamp(6),
                new.event,
                new.requestorEmail,
                new.requestReason,
                new.statusType,
                new.approverUserId,
                new.approverReason,
                new.lastChangTs);
end;
# DONE

我希望通过设置 splitStatements、stripComments 和 endDelimiter，我可以让 liquibase 将整个 SQL 作为一个发送到 JDBC。

但是我收到这个错误

[ERROR] Failed to execute goal org.liquibase:liquibase-maven-plugin:3.6.3:update (default) on project event-horizon-mysql: Error setting up or running Liquibase: Migration failed for change set /Users/lmtyler/OneDrive - Walmart Inc/workspace/code/event-horizon/event-horizon-mysql/src/main/java/resources/liquibase/schema/triggers/02__au_event_approval.sql::event_horizon_1_0_1::lmtyler:
[ERROR]      Reason: liquibase.exception.DatabaseException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 23 [Failed SQL: CREATE TRIGGER au_event_approval
[ERROR]     AFTER UPDATE
[ERROR]     ON event_approval
[ERROR]     FOR EACH row
[ERROR] begin
[ERROR]     insert into event_approval_log (rowAction,
[ERROR]                                     actionTs,
[ERROR]                                     event,
[ERROR]                                     requestorEmail,
[ERROR]                                     requestReason,
[ERROR]                                     statusType,
[ERROR]                                     approverUserId,
[ERROR]                                     approverReason,
[ERROR]                                     lastChangTs)
[ERROR]     values ('U',
[ERROR]             current_timestamp(6),
[ERROR]             new.event,
[ERROR]             new.requestorEmail,
[ERROR]             new.requestReason,
[ERROR]             new.statusType,
[ERROR]             new.approverUserId,
[ERROR]             new.approverReason,
[ERROR]             new.lastChangTs)]

Answer 1

随着@Jens 的建议睡了一晚上我终于明白了这个问题。

首先，如果您看到我的 post，错误不是我认为的 SQL。我以为是 AFTER INSERT 引发了错误，但实际上是 AFTER UPDATE

关键是要确保设置splitStatements:false，不需要设置endDelimiter。

这里有两个有效的例子：

<changeSet id="event_horizon_1_0_1" author="lmtyler" dbms="mysql">
    <sqlFile splitStatements="false" stripComments="false" path="01__ai_event_approval.sql" relativeToChangelogFile="true"/>
</changeSet>

用这个 sql 文件

CREATE DEFINER ='evclient'@'%' TRIGGER ai_event_approval
    AFTER INSERT
    ON event_approval
    FOR EACH row
begin
    insert into event_approval_log (rowAction,
                                    actionTs,
                                    event,
                                    requestorEmail,
                                    requestReason,
                                    statusType,
                                    approverUserId,
                                    approverReason,
                                    lastChangTs)
        values ('I',
                current_timestamp(6),
                new.event,
                new.requestorEmail,
                new.requestReason,
                new.statusType,
                new.approverUserId,
                new.approverReason,
                new.lastChangTs);
end;

这里使用的是 SQL 格式

--changeset lmtyler:event_horizon_1_0_1 dbms:mysql splitStatements:false
CREATE TRIGGER au_event_approval
    AFTER UPDATE
    ON event_approval
    FOR EACH row
begin
    insert into event_approval_log (rowAction,
                                    actionTs,
                                    event,
                                    requestorEmail,
                                    requestReason,
                                    statusType,
                                    approverUserId,
                                    approverReason,
                                    lastChangTs)
    values ('U',
            current_timestamp(6),
            new.event,
            new.requestorEmail,
            new.requestReason,
            new.statusType,
            new.approverUserId,
            new.approverReason,
            new.lastChangTs);
end;

Answer 2

我在 sql 标签内执行触发器时遇到了同样的问题。如果您在 liquibase 中执行一段代码，请不要忘记将 splitStatements:false 添加到您的 sql 标签中。

<changeSet id="your_id" author="your_name">

    <comment>your comments</comment>

    <sql splitStatements="false">
        CREATE TRIGGER trigger_name
        BEFORE UPDATE ON table_name FOR EACH ROW
        BEGIN
        --Your Code Block
        END;
    </sql>
</changeSet>

如何使用 liquibase 和 mysql 修复 SQL 语法错误来创建触发器

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