6 Commits (4effa8c1f8fbcc66352fcb99e5be870696de3be9)

Author	SHA1	Message	Date
Marco Slot	8893cc141d	Support INSERT...SELECT with ON CONFLICT or RETURNING via coordinator ... Before this commit, Citus supported INSERT...SELECT queries with ON CONFLICT or RETURNING clauses only for pushdownable ones, since queries supported via coordinator were utilizing COPY infrastructure of PG to send selected tuples to the target worker nodes. After this PR, INSERT...SELECT queries with ON CONFLICT or RETURNING clauses will be performed in two phases via coordinator. In the first phase selected tuples will be saved to the intermediate table which is colocated with target table of the INSERT...SELECT query. Note that, a utility function to save results to the colocated intermediate result also implemented as a part of this commit. In the second phase, INSERT.. SELECT query is directly run on the worker node using the intermediate table as the source table.	2018-11-30 15:29:12 +03:00
Onder Kalaci	d5472614df	Use non-data connection for intermediate results ... Make sure that intermediate results use a connection that is not associated with any placement. That is useful in two ways: - More complex queries can be executed with CTEs - Safely use the same connections when there is a foreign key to reference table from a distributed table, which needs to use the same connection for modifications since the reference table might cascade to the distributed table.	2018-06-21 13:26:13 +03:00
Marco Slot	90cdfff602	Implement recursive planning for DML statements	2018-05-03 14:42:28 +02:00
velioglu	32bcd610c1	Support modify queries with multiple tables ... With this commit we begin to support modify queries with multiple tables if these queries are pushdownable.	2018-05-02 16:22:26 +03:00
Metin Doslu	bcf660475a	Add support for modifying CTEs	2018-02-27 15:08:32 +02:00
mehmet furkan şahin	5851f71bfb	Add CTE regression tests	2017-12-14 09:32:55 +01:00