Oracle 视图 V$OPEN_CURSOR 官方解释,作用,如何使用详细说明
本站中文解释
Oracle视图V$OPEN_CURSOR是ORACLE预定义的视图,用于显示数据库中当前打开的游标。它显示了每个当前活动游标的信息。
该视图可用于查看SQL和PL/SQL程序在当前会话中打开的游标数量,以及每个游标的信息,包括扒开的SQL类型、子类型、关联的会话ID、对应的进程ID和会话的操作时间。
这个视图可以使用以下语法进行查询:
SELECT * FROM V$OPEN_CURSOR;
通过这种方式,系统管理员可以查看当前数据库会话中打开的游标。这些信息可以帮助系统管理员识别和分析可能出现性能问题的sql和pl/sql语句,以及性能优化的空间。
官方英文解释
V$OPEN_CURSOR
lists cursors that each user session currently has opened and parsed, or cached.
Column | Datatype | Description |
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Session address |
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Session identifier |
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User that is logged in to the session |
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Used with |
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Used with |
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SQL identifier of the SQL statement being executed in the session |
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First 60 characters of the SQL statement that is parsed into the open cursor |
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Time when this cursor was last executed |
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If the open cursor is executing, then the SQL execution identifier for that execution (see |
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Type of cursor:
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Address of the child cursor |
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The ID of the container to which the data pertains. Possible values include:
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