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Project "Postgres-XC".

The branch, master has been updated
       via  191d55ebf1faf897aed51f1b5fdcd71ec3ccdc6c (commit)
      from  5b00dd716cd6b47db2faee71dabc0fde91005ca6 (commit)


- Log -----------------------------------------------------------------
http://postgres-xc.git.sourceforge.net/git/gitweb.cgi?p=postgres-xc/postgres-xc;a=commitdiff;h=191d55ebf1faf897aed51f1b5fdcd71ec3ccdc6c

commit 191d55ebf1faf897aed51f1b5fdcd71ec3ccdc6c
Author: Ashutosh Bapat <ash...@en...>
Date:   Thu Feb 2 16:59:04 2012 +0530

    Add the support for Fast Query Shipping (FQS), a method to identify
    whether a query can be sent to the datanode/s as it is for evaluation and do so
    if deemed fit. In such cases, we create a plan with a single RemoteQuery node
    corresponding to the query and avoid the planning phase on coordinator.
    
    A query tree walker analyses all the nodes in the query tree and finds out the
    conditions under which the query is shippable and detects presence of
    expressions which can not be evaluated on the datanode. It looks at the
    relations involved in the query and deducts whether JOINs between these
    relations can be evaluated on a single datanode.
    
    Adds testcases xc_FQS and xc_FQS_join to test the fast query shipping
    functionality and make it independent of cluster configuration.

M	src/backend/access/hash/hashfunc.c
M	src/backend/commands/explain.c
M	src/backend/pgxc/locator/locator.c
M	src/backend/pgxc/plan/planner.c
M	src/include/pgxc/locator.h
M	src/include/pgxc/planner.h
A	src/test/regress/expected/xc_FQS.out
A	src/test/regress/expected/xc_FQS_join.out
M	src/test/regress/expected/xc_groupby.out
M	src/test/regress/expected/xc_having.out
M	src/test/regress/parallel_schedule
M	src/test/regress/serial_schedule
A	src/test/regress/sql/xc_FQS.sql
A	src/test/regress/sql/xc_FQS_join.sql
M	src/test/regress/sql/xc_groupby.sql
M	src/test/regress/sql/xc_having.sql

-----------------------------------------------------------------------

Summary of changes:
 src/backend/access/hash/hashfunc.c        |    4 +
 src/backend/commands/explain.c            |   45 +-
 src/backend/pgxc/locator/locator.c        |   16 +
 src/backend/pgxc/plan/planner.c           | 1092 +++++++++++++++++++++++------
 src/include/pgxc/locator.h                |   10 +-
 src/include/pgxc/planner.h                |   22 +
 src/test/regress/expected/xc_FQS.out      |  782 +++++++++++++++++++++
 src/test/regress/expected/xc_FQS_join.out |  384 ++++++++++
 src/test/regress/expected/xc_groupby.out  |    4 +
 src/test/regress/expected/xc_having.out   |    4 +
 src/test/regress/parallel_schedule        |    2 +-
 src/test/regress/serial_schedule          |    2 +
 src/test/regress/sql/xc_FQS.sql           |  181 +++++
 src/test/regress/sql/xc_FQS_join.sql      |  131 ++++
 src/test/regress/sql/xc_groupby.sql       |    6 +
 src/test/regress/sql/xc_having.sql        |    5 +
 16 files changed, 2432 insertions(+), 258 deletions(-)
 create mode 100644 src/test/regress/expected/xc_FQS.out
 create mode 100644 src/test/regress/expected/xc_FQS_join.out
 create mode 100644 src/test/regress/sql/xc_FQS.sql
 create mode 100644 src/test/regress/sql/xc_FQS_join.sql


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