若依框架数据源切换为pg库

一切换数据源

在ruoyi-admin项目里引入pg数据库驱动

<dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <version>42.2.18</version>
</dependency>

修改配置文件里的数据源为pg

spring:
    datasource:
        type: com.alibaba.druid.pool.DruidDataSource
        driverClassName: org.postgresql.Driver
        druid:
            # 主库数据源
            master:
                url: jdbc:postgresql://192.168.119.128:5432/FDS?stringtype=unspecified
                username: postgres
                password: ts123456

二切换函数以及语法

因为pg库里没有dual表，所以把配置文件里validationQuery的值，从SELECT 1 FROM DUAL 换为：select version()来判断数据库是否正常连接

PageHelper分页插件换成pgsql的

pagehelper:
  helperDialect: postgresql
  supportMethodsArguments: true
  params: count=countSql

在mapper.xml里全局搜索sysdate()，换为now()
在mapper.xml里全局搜索ifnull(字段，‘’) 函数，换成 COALESCE(字段，‘’)

char类型的值，mysql可以不加引号，但是pg必须加单引号

mapper.xml文件里，搜索status = 0 ，改为 status = '0'

搜索`query` ，换为query

全局搜索database()，换为CURRENT_SCHEMA()

xml里搜索sysdate()函数，换为now()

三加自增序列

凡是有自增主键的表，都要加自增序列

CREATE SEQUENCE sys_user_id_seq
	START WITH 3
	INCREMENT BY 1
	NO MINVALUE
	NO MAXVALUE 
	CACHE 1;
	
-- 设置表某个字段自增
alter table sys_user alter column user_id set default nextval('sys_user_id_seq');

-- 从当前最大id依次递增
--select setval('sys_user_id_seq',(select max(user_id) from sys_user));

CREATE SEQUENCE sys_oper_log_id_seq
	START WITH 3
	INCREMENT BY 1
	NO MINVALUE
	NO MAXVALUE 
	CACHE 1;

-- 设置表某个字段自增
alter table sys_oper_log alter column oper_id set default nextval('sys_oper_log_id_seq');

-- 从当前最大id依次递增
--select setval('sys_oper_log_id_seq',(select max(oper_id) from sys_oper_log));
CREATE SEQUENCE sys_role_id_seq
	START WITH 3
	INCREMENT BY 1
	NO MINVALUE
	NO MAXVALUE 
	CACHE 1;

-- 设置表某个字段自增
alter table sys_role alter column role_id set default nextval('sys_role_id_seq');

CREATE SEQUENCE sys_notice_id_seq
	START WITH 3
	INCREMENT BY 1
	NO MINVALUE
	NO MAXVALUE 
	CACHE 1;

-- 设置表某个字段自增
alter table sys_notice alter column notice_id set default nextval('sys_notice_id_seq');

CREATE SEQUENCE sys_dict_type_id_seq
	START WITH 11
	INCREMENT BY 1
	NO MINVALUE
	NO MAXVALUE 
	CACHE 1;

-- 设置表某个字段自增
alter table sys_dict_type alter column dict_id set default nextval('sys_dict_type_id_seq');

CREATE SEQUENCE sys_dept_id_seq
	START WITH 11
	INCREMENT BY 1
	NO MINVALUE
	NO MAXVALUE 
	CACHE 1;

-- 设置表某个字段自增
alter table sys_dept alter column dept_id set default nextval('sys_dept_id_seq');

SELECT 'CREATE SEQUENCE ' || sequence_name || ' START ' ||  start_value || ';' from information_schema.sequences;

CREATE SEQUENCE gen_table_id_seq
	START WITH 1
	INCREMENT BY 1
	NO MINVALUE
	NO MAXVALUE 
	CACHE 1;

-- 设置表某个字段自增
alter table gen_table alter column table_id set default nextval('gen_table_id_seq');

CREATE SEQUENCE gen_table_column_id_seq
	START WITH 1
	INCREMENT BY 1
	NO MINVALUE
	NO MAXVALUE 
	CACHE 1;

-- 设置表某个字段自增
alter table gen_table_column alter column column_id set default nextval('gen_table_column_id_seq');

CREATE SEQUENCE sys_post_id_seq
	START WITH 5
	INCREMENT BY 1
	NO MINVALUE
	NO MAXVALUE 
	CACHE 1;

-- 设置表某个字段自增
alter table sys_post alter column post_id set default nextval('sys_post_id_seq');

CREATE SEQUENCE sys_dict_data_code_seq
	START WITH 30
	INCREMENT BY 1
	NO MINVALUE
	NO MAXVALUE 
	CACHE 1;

-- 设置表某个字段自增
alter table sys_dict_data alter column dict_code set default nextval('sys_dict_data_code_seq');

查询序列

SELECT 'CREATE SEQUENCE ' || sequence_name || ' START ' ||  start_value || ';' from information_schema.sequences;

删除序列

DROP SEQUENCE sys_oper_log_id_seq

四加默认值、加引号

凡是之前是char类型的字段，并且有默认值的，都需要在navicat里添加默认值，如sys_user表、sys_role、sys_dept表的del_flag、status字段，设置默认值，注意，要加引号。sys_menu、sys_post、sys_notice、sys_loggininfo、sys_job_log、sys_dict_type、sys_dict_data表的status字段，设置默认值0，加引号。

在这里插入图片描述

五改代码

SysRole.java里的menuCheckStrictly、deptCheckStrictly改为int类型，index.vue里的menuCheckStrictly、deptCheckStrictly，由true改为1，搜索vue文件里的“父子联动”，注释掉。

GenTableMapper.xml里的id=“selectDbTableList”，改为下边这种

 <select id="selectDbTableList" parameterType="GenTable" resultMap="GenTableResult">
        select * from information_schema.tables
        where table_schema = (select CURRENT_SCHEMA())
        AND table_name NOT LIKE 'qrtz_%' AND table_name NOT LIKE 'gen_%'
        AND table_name NOT IN (select table_name from gen_table)
        <if test="tableName != null and tableName != ''">
            AND lower(table_name) like lower(concat('%', #{tableName}, '%'))
        </if>
        <!--<if test="tableComment != null and tableComment != ''">
            AND lower(table_comment) like lower(concat('%', #{tableComment}, '%'))
        </if>
        <if test="params.beginTime != null and params.beginTime != ''">&lt;!&ndash; 开始时间检索 &ndash;&gt;
            AND date_format(create_time,'%y%m%d') &gt;= date_format(#{params.beginTime},'%y%m%d')
        </if>
        <if test="params.endTime != null and params.endTime != ''">&lt;!&ndash; 结束时间检索 &ndash;&gt;
            AND date_format(create_time,'%y%m%d') &lt;= date_format(#{params.endTime},'%y%m%d')
        </if>
        order by create_time desc-->
</select>