liquibase 中的 Postgres 删除函数显示错误

Question

我在 xml 文件中有 FUNCTION，例如：

<?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog
        xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
        xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.0.xsd
        http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd">

    <changeSet id="1.0-procedures" author="api-manager">

        <sql>
            DROP FUNCTION IF EXISTS proc_api_consumer_audit_insert;
        </sql>

        <createProcedure>
            CREATE FUNCTION proc_api_consumer_audit_insert()
            RETURNS TRIGGER AS $api_consumer_audit$
            BEGIN
                INSERT INTO api_consumer_audit(LOREM_IPSUM) VALUES(LOREM_IPSUM);
                RETURN NEW;
            END;
            $$ LANGUAGE plpgsql;
        </createProcedure>

        <rollback>
            DROP FUNCTION IF EXISTS proc_api_consumer_audit_insert;
        </rollback>
    </changeSet>
</databaseChangeLog>

更新期间 liquibase 向我显示以下错误：

[ERROR] Failed to execute goal org.liquibase:liquibase-maven-plugin:3.5.3:update (default-cli) on project api-manager: Error setting up or running Liquibase: Migration failed for change set db/dev/changelog/1.0/1.0-procedures.xml::1.0-procedures::api-manager:
[ERROR] Reason: liquibase.exception.DatabaseException: ERROR: syntax error at end of input
[ERROR] Pozycja: 55 [Failed SQL: DROP FUNCTION IF EXISTS proc_api_consumer_audit_insert]
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Process finished with exit code 1

我无法解决这个错误日志。我该如何修复？

Answer 1

要删除函数，您需要指定包含参数签名的函数。如果函数没有参数，则需要使用():

DROP FUNCTION IF EXISTS proc_api_consumer_audit_insert();

这在 Postgres 10 中放宽了。如果函数没有重载（只有一个参数签名），您可以省略参数列表。因此，在 Postgres 10 中，您的语句无需更改即可工作

liquibase 中的 Postgres 删除函数显示错误

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