Commit Graph

6 Commits (e73b4ac026709eeb8acf93d24e2327abd78749c3)

Author SHA1 Message Date
Brian Cloutier e73b4ac026 Evaluate functions on the master
- Enables using VOLATILE functions (like nextval()) in INSERT queries
- Enables using STABLE functions (like now()) targetLists and joinTrees

UPDATE and INSERT can now contain non-immutable functions. INSERT can contain any kind of
expression, while UPDATE can contain any STABLE function, so long as a Var is not passed
into the STABLE function, even indirectly. UPDATE TagetEntry's can now also include Vars.

There's an exception, CASE/COALESCE statements may not contain mutable functions.

Functions calls in master_modify_multiple_shards are also evaluated.
2016-07-13 11:45:51 -07:00
Andres Freund 586f738bc7 Support RETURNING for modification commands.
Fixes: #242
2016-07-01 13:07:12 -07:00
Jason Petersen 8efb504d1a Refactor ReportRemoteError to remove boolean arg
Broke it into two explicitly-named functions instead: WarnRemoteError
and ReraiseRemoteError.
2016-06-07 12:38:32 -06:00
Metin Doslu dfc7dd8d87 Fail fast on constraint violations in router executor 2016-06-07 18:11:17 +03:00
Jason Petersen cc46222e35 Fix formatting
Checking in citus_indent output.
2016-05-27 15:13:28 -06:00
eren 793cb2d004 ADD master_modify_multiple_shards UDF
Fixes #10

This change creates a new UDF: master_modify_multiple_shards
Parameters:
  modify_query: A simple DELETE or UPDATE query as a string.

The UDF is similar to the existing master_apply_delete_command UDF.
Basically, given the modify query, it prunes the shard list, re-constructs
the query for each shard and sends the query to the placements.

Depending on the value of citus.multi_shard_commit_protocol, the commit
can be done in one-phase or two-phase manner.

Limitations:
* It cannot be called inside a transaction block
* It only be called with simple operator expressions (like Single Shard Modify)

Sample Usage:
```
SELECT master_modify_multiple_shards(
  'DELETE FROM customer_delete_protocol WHERE c_custkey > 500 AND c_custkey < 500');
```
2016-05-26 17:30:35 +03:00