Обсуждение: Tool for determining field usage of database tables
Does anyone know of a tool (or a way to use the database catalogs) that can analyze function code/queries accessing the database to pull out a list of the fields used in a set of tables. Basically we are importing a lot of data from another source, and we are trying to determine what percentage of the data we are actually using at this point . We have hundreds of stored procedures, and combing through the code would not be practical.
Thanks.
--Andy
Writing an audit trigger for the operations you'd like to monitor (then assign it to all your application's tables) to perform the auditing may be one easy way of doing so, this trigger would log the operations to some other table. Allan. On Thu, Feb 25, 2010 at 7:36 PM, Andy Yoder <ayoder@airfacts.com> wrote: > Does anyone know of a tool (or a way to use the database catalogs) that can > analyze function code/queries accessing the database to pull out a list of > the fields used in a set of tables. Basically we are importing a lot of > data from another source, and we are trying to determine what percentage of > the data we are actually using at this point . We have hundreds of stored > procedures, and combing through the code would not be practical. > > > > Thanks. > > > > --Andy > > > > > >
Thanks Allan for the input - I guess I didn't specify enough details. I am looking for some type of tool/report that isalready done. We have nearly 1000 tables, over 300 functions to look at a little over a day to provide the answers (allwithout dropping any other tasks, of course). I had considered the trigger idea, and may end of doing it anyway andjust working later, but thought I would check for a "ready-made" solution first. Andy -----Original Message----- From: Allan Kamau [mailto:kamauallan@gmail.com] Sent: Thursday, February 25, 2010 12:41 PM To: Andy Yoder Cc: pgsql-general@postgresql.org Subject: Re: [GENERAL] Tool for determining field usage of database tables Writing an audit trigger for the operations you'd like to monitor (then assign it to all your application's tables) to perform the auditing may be one easy way of doing so, this trigger would log the operations to some other table. Allan. On Thu, Feb 25, 2010 at 7:36 PM, Andy Yoder <ayoder@airfacts.com> wrote: > Does anyone know of a tool (or a way to use the database catalogs) that can > analyze function code/queries accessing the database to pull out a list of > the fields used in a set of tables. Basically we are importing a lot of > data from another source, and we are trying to determine what percentage of > the data we are actually using at this point . We have hundreds of stored > procedures, and combing through the code would not be practical. > > > > Thanks. > > > > --Andy > > > > > >
On Thu, Feb 25, 2010 at 12:56 PM, Andy Yoder <ayoder@airfacts.com> wrote: > Thanks Allan for the input - I guess I didn't specify enough details. I am looking for some type of tool/report that isalready done. We have nearly 1000 tables, over 300 functions to look at a little over a day to provide the answers (allwithout dropping any other tasks, of course). I had considered the trigger idea, and may end of doing it anyway andjust working later, but thought I would check for a "ready-made" solution first. Nothing as fine grained as per field, but there are the pg_stat_user_tables and pg_stat_user_indexes type system tables, which will show how much individual tables and indexes are getting used.