V$SQL_BIND_CAPTURE

最新推荐文章于 2025-09-03 12:09:54 发布

转载最新推荐文章于 2025-09-03 12:09:54 发布 · 312 阅读

本文介绍Oracle数据库中V$SQL_BIND_CAPTURE视图的功能与使用细节。该视图提供SQL游标所使用绑定变量的信息，包括绑定元数据及历史绑定数据值。适用于SQL性能调优与查询分析。

V$SQL_BIND_CAPTURE displays information on bind variables used by SQL cursors.
Each row in the view contains information for one bind variable defined in a cursor.
This includes:
■ Reference to the cursor defining the bind variable
(hash_value, address) for the parent cursor and (hash_value, child_
address) for the child cursor.
■ Bind metadata
Name, position, datatype, character set ID, precision, scale, and maximum length
of the bind variable.
■ Bind data
One of the bind values used for the bind variable during a past execution of its
associated SQL statement. Bind values are not always captured for this view. Bind
values are displayed by this view only when the type of the bind variable is simple
(this excludes LONG, LOB, and ADT datatypes) and when the bind variable is
used in the WHERE or HAVING clauses of the SQL statement.
Bind capture is disabled when the STATISTICS_LEVEL initialization parameter is set
to BASIC. This view can be joined with V$SQLAREA on (HASH_VALUE, ADDRESS) and
with V$SQL on (HASH_VALUE, CHILD_ADDRESS).[@more@]

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