oracle long to char转换(oracle 11g 10g)

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### Code Reference

• URL:https://blog.csdn.net/paul50060049/article/details/78811957
• DESC:oracle long to char转换(oracle 11g 10g)
• Last Update:2020-7-17 22:00
• Time：2020-7-17 22:00 Tittle：oracle long to char转换(oracle 11g 10g)
• Version:001

  • oracle long to char转换(oracle 11g 10g)

      -- 验证long to char
      select a.column_name,
             b.constraint_name,
             b.constraint_type,
             instr(fun_long2char(b.constraint_name, a.owner), ' IS NOT NULL')
        from dba_cons_columns a, dba_constraints b
       where a.constraint_name = b.constraint_name
         and a.owner = b.owner
         and b.constraint_type in ('P', 'R', 'U', 'C', 'V', 'O', 'H', 'F', 'S')
         and instr(fun_long2char(b.constraint_name, a.owner), ' IS NOT NULL') = 0
      -- 转化方法
      create or replace function fun_long2char(pv_constraintname in varchar2,
                                               pv_owner          in varchar2)
        return varchar2 as
        lv_text varchar2(32000);
      begin
        select search_condition
          into lv_text
          from dba_constraints t
         where upper(t.constraint_name) = upper(pv_constraintname)
           and upper(t.owner) = upper(pv_owner);
        lv_text := substr(nvl(lv_text, ''), 1, 500);
        return lv_text;
      end fun_long2char;
    

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