为什么Liquibase要dropPrimaryKey和addPrimaryKey？

Question

我有使用 Eclipse 生成的 Postgres 数据库 Link。这些数据库之间没有任何变化，但是当我运行 liquibase 用于生成 diffChangeLog 时，它会生成带有 dropPrimaryKey 和 addPrimaryKey 的变更集。我不明白为什么它会为所有 table 的所有主键生成这些记录。 table 的名称、列顺序相同。

变更集示例

<changeSet author="michal2 (generated)" id="1436872322297-8">
        <dropPrimaryKey tableName="country_translation"/>
        <addPrimaryKey columnNames="country_id, translations_id" constraintName="country_translation_pkey" tableName="country_translation"/>
    </changeSet>

Sql 原来 table

CREATE TABLE country_translation
(
  country_id bigint NOT NULL,
  translations_id bigint NOT NULL,
  CONSTRAINT country_translation_pkey PRIMARY KEY (country_id, translations_id),
  CONSTRAINT fk_country_translation_country_id FOREIGN KEY (country_id)
      REFERENCES country (id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE NO ACTION,
  CONSTRAINT fk_country_translation_translations_id FOREIGN KEY (translations_id)
      REFERENCES translation (id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE NO ACTION
)
WITH (
  OIDS=FALSE
);
ALTER TABLE country_translation
  OWNER TO hotels;

Sql 参考 table

CREATE TABLE country_translation
(
  country_id bigint NOT NULL,
  translations_id bigint NOT NULL,
  CONSTRAINT country_translation_pkey PRIMARY KEY (country_id, translations_id),
  CONSTRAINT fk_country_translation_country_id FOREIGN KEY (country_id)
      REFERENCES country (id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE NO ACTION,
  CONSTRAINT fk_country_translation_translations_id FOREIGN KEY (translations_id)
      REFERENCES translation (id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE NO ACTION
)
WITH (
  OIDS=FALSE
);
ALTER TABLE country_translation
  OWNER TO hotels;

带参数的 Liquibase 命令

./liquibase \
      --driver=org.postgresql.Driver \
      --classpath=/home/michal2/tools/postgresql-jdbc-driver/postgresql-jdbc.jar \
      --changeLogFile=changelog-hotels.xml \
      --url="jdbc:postgresql://localhost/hotels" \
      --username=hotels \
      --password=hotels \
      --defaultSchemaName=public \
    --logLevel=info \
    diffChangeLog \
    --referenceUrl="jdbc:postgresql://localhost/hotels_liquibase" \
    --referenceUsername=hotels \
    --referencePassword=hotels \
        --referenceDefaultSchemaName=public

我使用的是 3.4.0 版本

Answer 1

Liquibase 3.4.1 已修复此问题https://liquibase.jira.com/browse/CORE-2416

为什么Liquibase要dropPrimaryKey和addPrimaryKey？

Why does Liquibase want to dropPrimaryKey and addPrimaryKey?

postgresql

liquibase