正如您很可能从以下问题中推断出的那样,我通常是 DB2 的新手。我正在尝试使用 IBM Data Studio 编写我的第二个存储过程,但在尝试部署它时遇到了错误。存储过程的重点是在不同表的字段中搜索文本字符串。注意:代码不完整,在当前形式下没有用处。我正在尝试测试每一步。
这是我到目前为止的所有代码:
CREATE OR REPLACE PROCEDURE sp_find_string (in in_search_string varchar(200), in in_schema varchar(50))
DYNAMIC RESULT SETS 1
P1: BEGIN
-- #######################################################################
-- #
-- #######################################################################
declare table_a varchar(200);
declare colname varchar(200);
declare sqlcmd varchar(2000);
declare eof smallint default 0;
declare not_found condition for sqlstate '02000';
-- Declare cursor
DECLARE cursor1 CURSOR WITH RETURN for
select tabname, colname from syscat.columns c
--inner join syscat.tables t on t.tabschema = c.tabschema
-- and t.tabname = c.tabname
where tabname like 'MERLIN%'
and tabschema = in_schema;
DECLARE CONTINUE HANDLER FOR SQLSTATE '42704' -- or SQLEXCEPTION
-------------------------------------------------
if (exists
(
select 1 from sysibm.systables
where creator = 'A2815'
and name = 'DBP_TEMP_SEARCH_RESULTS'
)
) then drop table A2815.DBP_TEMP_SEARCH_RESULTS;
end if;
create table A2815.DBP_TEMP_SEARCH_RESULTS
(text_to_match varchar(200)
,table_a varchar(200)
,colname varchar(200)
,match_count bigint);
-- Cursor left open for client application
OPEN cursor1;
while eof = 0 do
p2: begin
declare continue handler for not_found set eof = 1;
fetch from cursor1 into table_a, colname;
insert into A2815.DPB_TEMP_SEARCH_RESULTS
values(table_a, colname);
end p2;
end while;
close cursor1;
--return;
END P1
尝试部署时出现此错误:
Deploy [TIO_D]A2815.SP_FIND_STRING(VARCHAR(200), VARCHAR(50))
Running
A2815.SP_FIND_STRING - Deploy started.
Create stored procedure returns SQLCODE: -204, SQLSTATE: 42704.
A2815.SP_FIND_STRING: 44: "A2815.DPB_TEMP_SEARCH_RESULTS" is an undefined name.. SQLCODE=-204, SQLSTATE=42704, DRIVER=4.18.60
"A2815.DPB_TEMP_SEARCH_RESULTS" is an undefined name.. SQLCODE=-204, SQLSTATE=42704, DRIVER=4.18.60
A2815.SP_FIND_STRING - Deploy failed.
A2815.SP_FIND_STRING - Roll back completed successfully.
当我注释掉插入语句时,它部署得很好(但当然,如果没有插入能力,这个过程对我没有多大好处):
OPEN cursor1;
while eof = 0 do
p2: begin
declare continue handler for not_found set eof = 1;
fetch from cursor1 into table_a, colname;
--insert into A2815.DPB_TEMP_SEARCH_RESULTS
--values(table_a, colname);
end p2;
end while;
close cursor1;
确实,该表还不存在,因为它应该由过程创建。但是,如果我创建表然后部署该过程,我会收到此错误:
Deploy [TIO_D]A2815.SP_FIND_STRING(VARCHAR(200), VARCHAR(50))
Running
A2815.SP_FIND_STRING - Deploy started.
Create stored procedure returns SQLCODE: -601, SQLSTATE: 42710.
A2815.SP_FIND_STRING: 32: The name of the object to be created is identical to the existing name "A2815.DBP_TEMP_SEARCH_RESULTS" of type "TABLE".. SQLCODE=-601, SQLSTATE=42710, DRIVER=4.18.60
The name of the object to be created is identical to the existing name "A2815.DBP_TEMP_SEARCH_RESULTS" of type "TABLE".. SQLCODE=-601, SQLSTATE=42710, DRIVER=4.18.60
A2815.SP_FIND_STRING - Deploy failed.
A2815.SP_FIND_STRING - Roll back completed successfully.
谁能告诉我如何在表存在、不存在或两者兼有时部署此过程?
非常感谢,让我知道还需要什么其他细节。此外,关于如何改进代码的建议也很好。