如何将存储过程生成的游标/结果集插入到 db2 中的临时表中

Question

您好，我正在尝试使用此方法将结果集插入临时表，

How i can put a result set from a stored procedure in a temporary table in DB2 之前有人问过这个问题，但实际上没有人这样回答。

CREATE OR REPLACE PROCEDURE SCHEMANAME.SP_CALLER()
DYNAMIC RESULT SETS 1

BEGIN
DECLARE GLOBAL TEMPORARY TABLE SESSION.temp_table(
useraccountid SMALLINT,
roleid SMALLINT,
userid varchar(20),
username varchar(50),
lastlogindate TIMESTAMP,
deleted SMALLINT
) ON COMMIT PRESERVE ROWS;

P1:BEGIN

DECLARE loc_cursor RESULT_SET_LOCATOR VARYING;

CALL SCHEMANAME.PR_USERACCOUNTGETALL();


ASSOCIATE RESULT SET LOCATOR (loc_cursor) WITH PROCEDURE SCHEMANAME.PR_USERACCOUNTGETALL;
ALLOCATE cur CURSOR FOR RESULT SET loc_cursor;

--INSERT INTO #TEMPTABLE (cur);
--FETCH cur INTO TRANSACTIONCODE;
--CLOSE CUR;

Insert into session.temp_table(cur);

END P1;

END

更新代码：

我尝试了你建议的sn-p代码，它运行没有错误，但我需要返回我从SESSION.temp_table查询的结果集，

DECLARE RET CURSOR WITH RETURN FOR SELECT * FROM SESSION.temp_table where userid='JOHNDOE'; 打开ret;

我现在如何从这里返回值？？

CREATE OR REPLACE PROCEDURE ITRS.SP_CALLER()
DYNAMIC RESULT SETS 1

BEGIN
DECLARE GLOBAL TEMPORARY TABLE SESSION.temp_table(
USERACCOUNTID SMALLINT,
ROLEID SMALLINT,
USERID VARCHAR(20),
USERNAME VARCHAR(50),
LASTLOGINDATE TIMESTAMP,
DELETED SMALLINT
);

P1:BEGIN

DECLARE loc_cursor RESULT_SET_LOCATOR VARYING;
DECLARE a CHAR(5) DEFAULT '00000';
DECLARE v_useraccountid SMALLINT;
DECLARE v_roleid SMALLINT;
DECLARE v_userid VARCHAR(20);
DECLARE v_username VARCHAR(50);
DECLARE v_lastlogindate TIMESTAMP;
DECLARE v_deleted SMALLINT;

DECLARE ret CURSOR WITH RETURN FOR
SELECT * FROM SESSION.temp_table where userid='JOHNDOE';
open ret;


CALL ITRS.PR_USERACCOUNTGETALL();

ASSOCIATE RESULT SET LOCATOR (loc_cursor) WITH PROCEDURE ITRS.PR_USERACCOUNTGETALL;
ALLOCATE cur CURSOR FOR RESULT SET loc_cursor;

ins_loop: LOOP
FETCH cur INTO v_useraccountid,v_roleid,v_userid,v_username,v_lastlogindate,v_deleted;
IF a <> '00000' THEN LEAVE ins_loop; END IF;
INSERT INTO SESSION.temp_table(USERACCOUNTID,ROLEID,USERID,USERNAME,LASTLOGINDATE,DELETED)
    VALUES(v_useraccountid,v_roleid,v_userid,v_username,v_lastlogindate,v_deleted);

END LOOP ins_loop;

CLOSE cur;
END P1;

END

更新：

这里我尝试通过SP将数据插入到正常插入的表中，所以我删除了临时表的声明，直接将哑表名称替换为临时表

--#SET TERMINATOR @
CREATE OR REPLACE PROCEDURE ITRS.SP_CALLER()
DYNAMIC RESULT SETS 1

BEGIN

DECLARE loc_cursor RESULT_SET_LOCATOR VARYING;
DECLARE SQLSTATE CHAR(5) DEFAULT '00000';
DECLARE v_useraccountid SMALLINT;
DECLARE v_roleid SMALLINT;
DECLARE v_userid VARCHAR(20);
DECLARE v_username VARCHAR(50);
DECLARE v_lastlogindate TIMESTAMP;
DECLARE v_deleted SMALLINT;

DECLARE ret CURSOR WITH RETURN FOR
SELECT * FROM ITRS.DUMBTABLE where USERID='JOHNDOE';


CALL ITRS.PR_USERACCOUNTGETALL();

ASSOCIATE RESULT SET LOCATOR (loc_cursor) WITH PROCEDURE ITRS.PR_USERACCOUNTGETALL;
ALLOCATE cur CURSOR FOR RESULT SET loc_cursor;

ins_loop: 
LOOP
  FETCH cur INTO v_useraccountid,v_roleid,v_userid,v_username,v_lastlogindate,v_deleted;
  IF SQLSTATE <> '00000' THEN LEAVE ins_loop; END IF;
  INSERT INTO ITRS.DUMBTABLE(USERACCOUNTID,ROLEID,USERID,USERNAME,LASTLOGINDATE,DELETED)
  VALUES(v_useraccountid,v_roleid,v_userid,v_username,v_lastlogindate,v_deleted);
  COMMIT;
END LOOP ins_loop;
CLOSE cur;
open ret;
END@

Answer 1

例如，您应该按照LOOP statement in SQL procedures 中所述的循环从游标中获取数据。

--#SET TERMINATOR @
DECLARE GLOBAL TEMPORARY TABLE SESSION.temp_table(
USERACCOUNTID SMALLINT,
ROLEID SMALLINT,
USERID VARCHAR(20),
USERNAME VARCHAR(50),
LASTLOGINDATE TIMESTAMP,
DELETED SMALLINT
) WITH REPLACE NOT LOGGED@

CREATE OR REPLACE PROCEDURE ITRS.SP_CALLER()
DYNAMIC RESULT SETS 1

BEGIN

DECLARE loc_cursor RESULT_SET_LOCATOR VARYING;
DECLARE SQLSTATE CHAR(5) DEFAULT '00000';
DECLARE v_useraccountid SMALLINT;
DECLARE v_roleid SMALLINT;
DECLARE v_userid VARCHAR(20);
DECLARE v_username VARCHAR(50);
DECLARE v_lastlogindate TIMESTAMP;
DECLARE v_deleted SMALLINT;

DECLARE ret CURSOR WITH RETURN FOR
SELECT * FROM SESSION.temp_table where userid='JOHNDOE';

DECLARE GLOBAL TEMPORARY TABLE SESSION.temp_table(
USERACCOUNTID SMALLINT,
ROLEID SMALLINT,
USERID VARCHAR(20),
USERNAME VARCHAR(50),
LASTLOGINDATE TIMESTAMP,
DELETED SMALLINT
) WITH REPLACE NOT LOGGED;

CALL ITRS.PR_USERACCOUNTGETALL();

ASSOCIATE RESULT SET LOCATOR (loc_cursor) WITH PROCEDURE ITRS.PR_USERACCOUNTGETALL;
ALLOCATE cur CURSOR FOR RESULT SET loc_cursor;

ins_loop: 
LOOP
  FETCH cur INTO v_useraccountid,v_roleid,v_userid,v_username,v_lastlogindate,v_deleted;
  IF SQLSTATE <> '00000' THEN LEAVE ins_loop; END IF;
  INSERT INTO SESSION.temp_table(USERACCOUNTID,ROLEID,USERID,USERNAME,LASTLOGINDATE,DELETED)
  VALUES(v_useraccountid,v_roleid,v_userid,v_username,v_lastlogindate,v_deleted);
END LOOP ins_loop;

CLOSE cur;
open ret;

END@

请注意，如果您使用 COMPOUND SQL 语句，则必须使用一些不同的语句分隔符，例如 @ 而不是默认的 ;。
不要更改SQLSTATE 变量名。这是特别的。它几乎在每条语句自动执行后设置。
如果您运行包含此文本的文件，该示例应该可以在 Db2 命令行处理器中运行（它可以理解第一行中的指令）。
如果你使用一些不同的工具来运行语句，你必须找到一个可以更改默认语句终止符的地方。