database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-11-03 09:13:20 +03:00
Code Activity

Faster partition pruning

Browse Source 
Add a new module backend/partitioning/partprune.c, implementing a more
sophisticated algorithm for partition pruning.  The new module uses each
partition's "boundinfo" for pruning instead of constraint exclusion,
based on an idea proposed by Robert Haas of a "pruning program": a list
of steps generated from the query quals which are run iteratively to
obtain a list of partitions that must be scanned in order to satisfy
those quals.

At present, this targets planner-time partition pruning, but there exist
further patches to apply partition pruning at execution time as well.

This commit also moves some definitions from include/catalog/partition.h
to a new file include/partitioning/partbounds.h, in an attempt to
rationalize partitioning related code.

Authors: Amit Langote, David Rowley, Dilip Kumar
Reviewers: Robert Haas, Kyotaro Horiguchi, Ashutosh Bapat, Jesper Pedersen.
Discussion: https://postgr.es/m/098b9c71-1915-1a2a-8d52-1a7a50ce79e8@lab.ntt.co.jp
This commit is contained in:
Alvaro Herrera
2018-04-06 16:23:04 -03:00
parent 11523e860f
commit 9fdb675fc5
27 changed files with 3993 additions and 415 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/include/nodes/nodes.h
View File

@@ -193,6 +193,9 @@ typedef enum NodeTag
T_FromExpr,
T_OnConflictExpr,
T_IntoClause,
T_PartitionPruneStep,
T_PartitionPruneStepOp,
T_PartitionPruneStepCombine,
/*
* TAGS FOR EXPRESSION STATE NODES (execnodes.h)
@@ -262,7 +265,6 @@ typedef enum NodeTag
T_PlaceHolderVar,
T_SpecialJoinInfo,
T_AppendRelInfo,
T_PartitionedChildRelInfo,
T_PlaceHolderInfo,
T_MinMaxAggInfo,
T_PlannerParamItem,