postgres-xc-committers Mailing List for Postgres-XC

Project "Postgres-XC".

The branch, PGXC-sqlmed has been updated
       via  eb50a76cb929fbe4a31d093b43e1589382c892a0 (commit)
      from  69bb66c62f71b9be918475ea65931adb3bbfba20 (commit)


- Log -----------------------------------------------------------------
commit eb50a76cb929fbe4a31d093b43e1589382c892a0
Author: Pavan Deolasee <pav...@gm...>
Date:   Wed Oct 27 16:09:28 2010 +0530

    Set remote relation stats (pages, rows etc) to a lower value so that
    NestLoop joins are preferred over other join types. This is necessary
    until we can handle other join types for remote join reduction

diff --git a/src/backend/optimizer/util/relnode.c b/src/backend/optimizer/util/relnode.c
index 957a515..b1c8bcb 100644
--- a/src/backend/optimizer/util/relnode.c
+++ b/src/backend/optimizer/util/relnode.c
@@ -102,6 +102,20 @@ build_simple_rel(PlannerInfo *root, int relid, RelOptKind reloptkind)
 		case RTE_RELATION:
 			/* Table --- retrieve statistics from the system catalogs */
 			get_relation_info(root, rte->relid, rte->inh, rel);
+#ifdef PGXC
+			/* 
+			 * This is a remote table... we have no idea how many pages/rows
+			 * we may get from a scan of this table. However, we should set the
+			 * costs in such a manner that cheapest paths should pick up the
+			 * ones involving these remote rels
+			 *
+			 * These allow for maximum query shipping to the remote
+			 * side later during the planning phase
+			 */
+			rel->pages   = 1;
+			rel->tuples  = 1;
+			rel->rows    = 1;
+#endif
 			break;
 		case RTE_SUBQUERY:
 		case RTE_FUNCTION:

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

Summary of changes:
 src/backend/optimizer/util/relnode.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)


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Postgres-XC

Project "Postgres-XC".

The branch, master has been updated
       via  d7d492eaeca181add193b4705de58637f5ba7c58 (commit)
      from  fee989010d22b6ca6c47b72d2d9b0620e4ab42b8 (commit)


- Log -----------------------------------------------------------------
commit d7d492eaeca181add193b4705de58637f5ba7c58
Author: Michael P <mic...@us...>
Date:   Wed Oct 27 09:06:15 2010 +0900

    Deletion of a DEBUG message in postmaster.c
    
    When opening a child under postmaster,
    there was always a message written in log telling about the PID number.
    This was written for bug pruposes only.

diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index 56974b0..0add0e6 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -3181,10 +3181,6 @@ BackendStartup(Port *port)
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
-		//// FOR DEBUG
-		printf("The session started: %d\n", getpid());
-		//sleep(60);
-		//// FOR DEBUG
 		free(bn);
 
 		/*

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

Summary of changes:
 src/backend/postmaster/postmaster.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)


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