db2存储过程动态sql单引号问题，急急急啊~~~！！！！

SET sql_create = 'create table  zjb as ( select groupid from(select '||IN_FOCUSFIELD||',rank() over(order by '||IN_GROUPBY||' as groupid from '||IN_TBNAME||' a group by groupid having max(cast('||IN_FOCUSFIELD||'as int)) - min(cast('||IN_FOCUSFIELD||' as int)) >= '||V_TRENDSTEP||')))' || 'definition only IN ' ||IN_TABLESPACE|| ' INDEX IN ' ||IN_INDEXSPACE|| ' not logged initially';

这里面的V_TRENDSTEP旁边老是报错，两边一个单引号报错，三个单引号还是报错，大婶们救命啊~~~~
附上存储过程附件

附件：

s.sql (3.4 KB)