fetch out of sequence sqlcode = -1002 异常原因和解决方法

最新推荐文章于 2024-08-13 22:57:09 发布

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最新推荐文章于 2024-08-13 22:57:09 发布

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分类专栏： ORACLE

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本文详细解析了ORA-01002异常的出现原因，即在未成功解析并执行SQL语句前尝试获取数据，或在SELECT FOR UPDATE游标后提交时发生错误。常见于PL/SQL游标循环中。

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官方解释：

ORA-01002:	fetch out of sequence
Cause:	In a host language program, a FETCH call was issued out of sequence. A successful parse-and-execute call must be issued before a fetch. This can occur if an attempt was made to FETCH from an active set after all records have been fetched. This may be caused by fetching from a SELECT FOR UPDATE cursor after a commit. A PL/SQL cursor loop implicitly does fetches and may also cause this error.
Action:	Parse and execute a SQL statement before attempting to fetch the data.

在一个select for 循环中，如修改提交了数据，那么可能出现这个错误。