Tag: where

Waiting for PostgreSQL 12 – Allow COPY FROM to filter data using WHERE conditions

On 19th of January 2019, Tomas Vondra committed patch:

Allow COPY FROM to filter data using WHERE conditions
 
Extends the COPY FROM command with a WHERE condition, which allows doing
various types of filtering while importing the data (random sampling,
condition on a data column, etc.).  Until now such filtering required
either preprocessing of the input data, or importing all data and then
filtering in the database. COPY FROM ... WHERE is an easy-to-use and
low-overhead alternative for most simple cases.
 
Author: Surafel Temesgen
 
Discussion: https://www.postgresql.org/message-id/flat/CALAY4q_DdpWDuB5-Zyi-oTtO2uSk8pmy+dupiRe3AvAc++1imA@mail.gmail.com

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Waiting for 9.4 – WITH CHECK OPTION support for auto-updatable VIEWs

On 18th of July, Stephen Frost committed patch:

WITH CHECK OPTION support for auto-updatable VIEWs
 
For simple views which are automatically updatable, this patch allows
the user to specify what level of checking should be done on records
being inserted or updated.  For 'LOCAL CHECK', new tuples are validated
against the conditionals of the view they are being inserted into, while
for 'CASCADED CHECK' the new tuples are validated against the
conditionals for all views involved (from the top down).
 
This option is part of the SQL specification.
 
Dean Rasheed, reviewed by Pavel Stehule

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