oracle plsql 如果没有找到重复

Question

set verify off

accept project prompt ' project : '
select locknr,description,couserid,ciuserid from dgdtw_lockedinfo where     
description = '&project' and ciuserid is null;

accept lock prompt ' locknumber  : '

update dgdtw_lockedinfo set ciuserid = couserid where locknr = &lock;
update dgdtw_topografie set locknr = '' where locknr = &lock;
update dgdtw_topografie set verval=sysdate where id= &lock;
commit;

accept var prompt 'repeat process?  [Y/N] ? '
define doit = 'H:\Scripts\stop.sql'
column doit new_value doit noprint
set termout off
select 'H:\Scripts\unlock.sql' doit from dual where upper('&var') like 'Y%';
set termout on
start &doit.

我需要一个循环脚本，这样如果项目为空或错误，脚本会要求重复或停止。类似于：

accept var prompt 'project number is wrong try again?  [Y/N] ? '

直到项目编号正确或答案为 "N"

Answer 1

下面的示例将在该项目没有锁定时立即重新启动 unlock.sql，方法是将对 unlock.sql 的调用重新定义为对 empty.sql 的调用，只要至少有一行被锁定返回。

set verify off

accept project prompt ' project : '

define doit = 'H:\Scripts\unlock.sql'
column doit new_value doit noprint
select 'H:\Scripts\empty.sql' as doit, locknr,description,couserid,ciuserid from dgdtw_lockedinfo where     
description = '&project' and ciuserid is null;
start &doit. 

accept lock prompt ' locknumber  : '

update dgdtw_lockedinfo set ciuserid = couserid where locknr = &lock;
update dgdtw_topografie set locknr = '' where locknr = &lock;
update dgdtw_topografie set verval=sysdate where id= &lock;
commit;

accept var prompt 'repeat process?  [Y/N] ? '
define doit = 'H:\Scripts\stop.sql'
column doit new_value doit noprint
set termout off
select 'H:\Scripts\unlock.sql' doit from dual where upper('&var') like 'Y%';
set termout on
start &doit.

作为一项改进，我建议将重复问题移动到一个单独的 SQL 文件中，然后使用一个参数调用它，告诉它要重新启动哪个脚本（参见 https://docs.oracle.com/cd/B10501_01/server.920/a90842/ch13.htm#1013716）

例如，从 'unlock.sql' 像这样调用 'repeat.sql'：

start 'repeat.sql' unlock

和 repeat.sql 是这样的：

accept var prompt 'repeat &1 process?  [Y/N] ? '
define doit = 'H:\Scripts\stop.sql'
column doit new_value doit noprint
set termout off
select 'H:\Scripts\&1.sql' doit from dual where upper('&var') like 'Y%';
set termout on
start &doit.

oracle plsql 如果没有找到重复

oracle plsql if not found repeat

sql

oracle

plsql

sqlplus