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Author SHA1 Message Date
Onder Kalaci 9f0bd4cb36 Reference Table Support - Phase 1 
With this commit, we implemented some basic features of reference tables.

To start with, a reference table is
  * a distributed table whithout a distribution column defined on it
  * the distributed table is single sharded
  * and the shard is replicated to all nodes

Reference tables follows the same code-path with a single sharded
tables. Thus, broadcast JOINs are applicable to reference tables.
But, since the table is replicated to all nodes, table fetching is
not required any more.

Reference tables support the uniqueness constraints for any column.

Reference tables can be used in INSERT INTO .. SELECT queries with
the following rules:
  * If a reference table is in the SELECT part of the query, it is
    safe join with another reference table and/or hash partitioned
    tables.
  * If a reference table is in the INSERT part of the query, all
    other participating tables should be reference tables.

Reference tables follow the regular co-location structure. Since
all reference tables are single sharded and replicated to all nodes,
they are always co-located with each other.

Queries involving only reference tables always follows router planner
and executor.

Reference tables can have composite typed columns and there is no need
to create/define the necessary support functions.

All modification queries, master_* UDFs, EXPLAIN, DDLs, TRUNCATE,
sequences, transactions, COPY, schema support works on reference
tables as expected. Plus, all the pre-requisites associated with
distribution columns are dismissed.
 2016-12-20 14:09:35 +02:00
Metin Doslu 161093908e Convert colocationid to uint32 2016-10-20 10:59:31 +03:00
Marco Slot 32b2bd4ed8 Add replication model column to pg_dist_partition 2016-10-05 01:14:28 +02:00
Burak Yucesoy 1ee39eb098 Internal co-location API 
With this commit we introduce internal API for co-location related operations.
 2016-09-29 11:56:53 +03:00
Andres Freund 63fb8311cb Don't access pg_dist_partition->partkey directly, use heap_getattr(). 
Text datums can't be directly accessed via the struct equivalence trick
used to access catalogs. That's because, as an optimization, they're
sometimes aligned to 1 byte ("text"'s alignment), and sometimes to 4
bytes. That depends on it being a short
varlena (cf. VARATT_NOT_PAD_BYTE) or not.

In the case at hand here, partkey became longer than 127 characters -
the boundary for short varlenas (cf. VARATT_CAN_MAKE_SHORT()). Thus it
became 4 byte/int aligned. Which lead to the direct struct access
accessing the wrong data.

The fix is simply to never access partkey that way - to enforce that,
hide partkey ehind the usual ifdef.

Fixes: #674
 2016-07-29 10:02:36 -07:00
Jason Petersen 423e6c8ea0
Update copyright dates 
Fixed configure variable and updated all end dates to 2016.
 2016-03-23 17:14:37 -06:00
Jason Petersen fdb37682b2
First formatting attempt 
Skipped csql, ruleutils, readfuncs, and functions obviously copied from
PostgreSQL. Seeing how this looks, then continuing.
 2016-02-15 23:29:32 -07:00
Onder Kalaci 136306a1fe Initial commit of Citus 5.0 2016-02-11 04:05:32 +02:00