Question

下面是确定表是否存在的PL / SQL脚本然后删除/创建表。如果它不存在，无论如何都要创建表。所以，当我运行脚本时，我收到了以下内容：

ORA-00904：“E”：标识符无效

我认为语法准确，双引号'E'是正确的，但显然不是。请指教。

感谢。

DECLARE 

  l_cnt NUMBER;

BEGIN
  SELECT COUNT(*)
    INTO l_cnt
    FROM dba_tables
   WHERE owner = 'ABCD'
     AND table_name = 'SEC_REC_TEMP';

  IF( l_cnt > 0 )
  THEN
     EXECUTE IMMEDIATE 'DROP TABLE sec_rec_temp';
     EXECUTE IMMEDIATE 'CREATE TABLE sec_rec_temp 
                        AS
                        SELECT is.inv_num
                          FROM abcd.inv_summ is
                              ,abcd.bill_fee bf
                         WHERE is.inv_num = bf.inv_num
                           AND trim(bf.fee_type) = "E"
                         GROUP BY is.inv_num';
  ELSE
     EXECUTE IMMEDIATE 'CREATE TABLE sec_rec_temp 
                        AS
                        SELECT is.inv_num
                          FROM abcd.inv_summ is
                              ,abcd.bill_fee bf
                         WHERE is.inv_num = bf.inv_num
                           AND trim(bf.fee_type) = "E"
                         GROUP BY is.inv_num';
  END IF;
END;
/

Answer 1

首先，丢弃并重新创建表的PL / SQL脚本非常可疑。例如，你真的确定你不想创建一个只是定期刷新的物化视图吗？在PL / SQL中执行DDL几乎总是一种糟糕的方法。如果您可以解释您尝试解决的业务问题，我们可能会为您提供更好的技术解决方案。

其次，如果要在PL / SQL中转义字符串中的单引号，则需要使用两个连续的单引号。不是一个双引号字符。

DECLARE 
  l_cnt NUMBER;
BEGIN
  SELECT COUNT(*)
    INTO l_cnt
    FROM dba_tables
   WHERE owner = 'ABCD'
     AND table_name = 'SEC_REC_TEMP';

  IF( l_cnt > 0 )
  THEN
     EXECUTE IMMEDIATE 'DROP TABLE sec_rec_temp';
     EXECUTE IMMEDIATE 'CREATE TABLE sec_rec_temp 
                        AS
                        SELECT is.inv_num
                          FROM abcd.inv_summ is
                              ,abcd.bill_fee bf
                         WHERE is.inv_num = bf.inv_num
                           AND trim(bf.fee_type) = ''E''
                         GROUP BY is.inv_num';
  ELSE
     EXECUTE IMMEDIATE 'CREATE TABLE sec_rec_temp 
                        AS
                        SELECT is.inv_num
                          FROM abcd.inv_summ is
                              ,abcd.bill_fee bf
                         WHERE is.inv_num = bf.inv_num
                           AND trim(bf.fee_type) = ''E''
                         GROUP BY is.inv_num';
  END IF;
END;

或者，您可以使用q引用语法

DECLARE 
  l_cnt NUMBER;
BEGIN
  SELECT COUNT(*)
    INTO l_cnt
    FROM dba_tables
   WHERE owner = 'ABCD'
     AND table_name = 'SEC_REC_TEMP';

  IF( l_cnt > 0 )
  THEN
     EXECUTE IMMEDIATE 'DROP TABLE sec_rec_temp';
     EXECUTE IMMEDIATE q'[CREATE TABLE sec_rec_temp 
                        AS
                        SELECT is.inv_num
                          FROM abcd.inv_summ is
                              ,abcd.bill_fee bf
                         WHERE is.inv_num = bf.inv_num
                           AND trim(bf.fee_type) = 'E'
                         GROUP BY is.inv_num]';
  ELSE
     EXECUTE IMMEDIATE q'[CREATE TABLE sec_rec_temp 
                        AS
                        SELECT is.inv_num
                          FROM abcd.inv_summ is
                              ,abcd.bill_fee bf
                         WHERE is.inv_num = bf.inv_num
                           AND trim(bf.fee_type) = 'E'
                         GROUP BY is.inv_num]';
  END IF;
END;

Answer 2

您需要使用另一个单引号来逃避单引号

  AND trim(bf.fee_type) = ''E''

如何使用EXECUTE IMMEDIATE语句更正PL / SQL脚本中的ORA-00904错误？

2 个答案: