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5 commits

Author SHA1 Message Date
Sergei Petrunia
af4b2ae858 MDEV-21887: federatedx crashes on SELECT ... INTO query in select_handler code 
Backport to 10.4:

- Don't try to push down SELECTs that have a side effect

- In case the storage engine did support pushdown of SELECT with an INTO
  clause, write the rows we've got from it into select->join->result,
  and not thd->protocol.  This way, SELECT ... INTO ... FROM
  smart_engine_table will put the result into where instructed, and
  NOT send it to the client.
 2020-03-26 15:01:44 +03:00
Igor Babaev
17d00d9a94 MDEV-17096 Pushdown of simple derived tables to storage engines 
Made the setting of the system variable federated_pushdown at
the default connection.
 2019-02-12 14:00:48 -08:00
Igor Babaev
58b950737c MDEV-17096 Pushdown of simple derived tables to storage engines 
Added plugin system variable federated_pushdown.
 2019-02-12 13:11:32 -08:00
Igor Babaev
d11be23933 MDEV-17096 Pushdown of simple derived tables to storage engines 
Resolved the problem of forming a proper query string for FEDERATEDX.
Added test cases.

Cleanup of extra spaces.
 2019-02-09 22:54:26 -08:00
Igor Babaev
16327fc2e7 MDEV-17096 Pushdown of simple derived tables to storage engines 
MDEV-17631 select_handler for a full query pushdown

Interfaces + Proof of Concept for federatedx with test cases.

The interfaces have been developed for integration of ColumnStore engine.
 2019-02-06 17:02:44 -08:00