isolation.so

berkeley db 4.6.21的源码。berkeley db是一个简单的数据库管理系统

m4_comment([$Id: isolation.so,v 1.4 2005/10/20 16:14:24 bostic Exp $])

m4_ref_title(Upgrading m4_db Applications,
    [Release 4.4: DB_DEGREE_2, DB_DIRTY_READ],,
    upgrade.4.4/autocommit, upgrade.4.4/joinenv)

m4_p([dnl
The names of two isolation-level flags changed in the m4_db 4.4 release.
The DB_DEGREE_2 flag was renamed to m4_ref(DB_READ_COMMITTED), and the
DB_DIRTY_READ flag was renamed to m4_ref(DB_READ_UNCOMMITTED), to match
ANSI standard names for isolation levels.  The historic flag names
continue to work in this release, but may be removed from future
releases.])

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