java使用mybatis 调用函数返回一个游标结果集

Posted 2022-04-01 瀚高PG实验室

瀚高数据库
目录
环境
文档用途
详细信息

环境
系统平台：IBM:Linux on System z Red Hat Enterprise Linux 7
版本：4.5,6.0
文档用途
mybatis调用函数返回一个游标时如何接收

详细信息
1.service实现类代码

@Override
@Transactional
public List<HighgoFunOneRefcursorEntity> getOneRefcursor(Integer id) 

    HashMap<String, Object> map = new HashMap<String, Object>();
    map.put("id", id);
    highgoFunOneRefcursorDao.getOneRefcursor(map);
    List<HighgoFunOneRefcursorEntity> list = (List<HighgoFunOneRefcursorEntity>)map.get("result");

    return list;

2.dao层

@Mapper
public interface HighgoFunOneRefcursorDao extends BaseMapper<HighgoFunOneRefcursorEntity> 

    ArrayList<Map<String, Object>> getOneRefcursor(HashMap map);
   

3.mapper

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.database.mybatisplus.modules.demo.dao.HighgoFunOneRefcursorDao">

   <!-- 可根据自己的需求，是否要使用 -->
    <resultMap type="com.database.mybatisplus.modules.demo.entity.HighgoFunOneRefcursorEntity" id="highgoFunOneRefcursorMap">
        <result property="hanzi" column="hanzi"/>
        <result property="quanpin" column="quanpin"/>
        <result property="szm" column="szm"/>
        <result property="duyin" column="duyin"/>
        <result property="numbersd" column="numbersd"/>
        <result property="sd" column="sd"/>
        <result property="repsd" column="repsd"/>
        <result property="hzascii" column="hzascii"/>
    </resultMap>

    <!-- 调用函数程返回一个游标 -->
    <select id="getOneRefcursor" parameterType="map" statementType="CALLABLE" resultType="java.util.Map">
        #result,mode=OUT,jdbcType=OTHER,javaType=ResultSet,resultMap=highgoFunOneRefcursorMap = call fn_one_refcursor(#id,mode=IN)
    </select>

</mapper>

4.数据库函数

CREATE OR REPLACE FUNCTION test.fn_one_refcursor(integer)
 RETURNS refcursor
 LANGUAGE plpgsql
AS $function$
declare $2 refcursor;
begin
	if $1 = 1 then 
		open $2 for select * from hzpyszm limit 100;
	elseif $1 = 2 then
		open $2 for select hanzi,quanpin,szm,duyin from hzpyszm limit 100;
	else 
		open $2 for select hanzi,quanpin from hzpyszm limit 100;
	end if;
	return $2;
	exception when others then
		raise exception 'sql exception--%',sqlerrm;
end;
$function$
;

5.jdbc添加参数

url: jdbc:highgo://192.168.21.138:5870/test?escapeSyntaxCallMode=callIfNoReturn

6.数据库表

CREATE TABLE hzpyszm (
	hanzi varchar(4) NULL,
	quanpin varchar(10) NULL,
	szm varchar(5) NULL,
	duyin varchar(10) NULL,
	numbersd varchar(1) NULL,
	sd varchar(5) NULL,
	repsd varchar(5) NULL,
	hzascii int8 NULL
);
CREATE INDEX hzpyszm_hanzi_idx ON test.hzpyszm USING btree (hanzi varchar_pattern_ops);

INSERT INTO hzpyszm (hanzi, quanpin, szm, duyin, numbersd, sd, repsd, hzascii) VALUES('唔', 'ngn', 'n', 'ńgń', '2', NULL, NULL, 21780);
INSERT INTO hzpyszm (hanzi, quanpin, szm, duyin, numbersd, sd, repsd, hzascii) VALUES('匌', 'ge', 'g', 'gé', '2', 'é', 'e', 21260);
INSERT INTO hzpyszm (hanzi, quanpin, szm, duyin, numbersd, sd, repsd, hzascii) VALUES('匍', 'pu', 'p', 'pú', '2', 'ú', 'u', 21261);
INSERT INTO hzpyszm (hanzi, quanpin, szm, duyin, numbersd, sd, repsd, hzascii) VALUES('匎', 'e', 'e', 'è', '4', 'è', 'e', 21262);
INSERT INTO hzpyszm (hanzi, quanpin, szm, duyin, numbersd, sd, repsd, hzascii) VALUES('匏', 'pao', 'p', 'páo', '2', 'á', 'a', 21263);
INSERT INTO hzpyszm (hanzi, quanpin, szm, duyin, numbersd, sd, repsd, hzascii) VALUES('匐', 'fu', 'f', 'fú', '2', 'ú', 'u', 21264);
INSERT INTO hzpyszm (hanzi, quanpin, szm, duyin, numbersd, sd, repsd, hzascii) VALUES('匑', 'gong', 'g', 'gōng', '1', 'ō', 'o', 21265);
INSERT INTO hzpyszm (hanzi, quanpin, szm, duyin, numbersd, sd, repsd, hzascii) VALUES('匒', 'da', 'd', 'dá', '2', 'á', 'a', 21266);
INSERT INTO hzpyszm (hanzi, quanpin, szm, duyin, numbersd, sd, repsd, hzascii) VALUES('匓', 'jiu', 'j', 'jiù', '4', 'ù', 'u', 21267);
INSERT INTO hzpyszm (hanzi, quanpin, szm, duyin, numbersd, sd, repsd, hzascii) VALUES('匔', 'gong', 'g', 'gōng', '1', 'ō', 'o', 21268);