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Comment improvements for ForeignPath.

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It's not necessarily just scanning a base relation any more.

Amit Langote and Etsuro Fujita
This commit is contained in:
Robert Haas
2016-04-21 13:30:48 -04:00
parent 9f84280ae9
commit 36f69faeff
2 changed files with 3 additions and 2 deletions
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2
src/backend/optimizer/README
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@ -355,7 +355,7 @@ RelOptInfo - a relation or joined relations
BitmapHeapPath - top of a bitmapped index scan BitmapHeapPath - top of a bitmapped index scan
TidPath - scan by CTID TidPath - scan by CTID
SubqueryScanPath - scan a subquery-in-FROM SubqueryScanPath - scan a subquery-in-FROM
ForeignPath - scan a foreign table ForeignPath - scan a foreign table, foreign join or foreign upper-relation
CustomPath - for custom scan providers CustomPath - for custom scan providers
AppendPath - append multiple subpaths together AppendPath - append multiple subpaths together
MergeAppendPath - merge multiple subpaths, preserving their common sort order MergeAppendPath - merge multiple subpaths, preserving their common sort order

3
src/include/nodes/relation.h
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@ -1030,7 +1030,8 @@ typedef struct SubqueryScanPath
} SubqueryScanPath; } SubqueryScanPath;
/* /*
* ForeignPath represents a potential scan of a foreign table * ForeignPath represents a potential scan of a foreign table, foreign join
* or foreign upper-relation.
* *
* fdw_private stores FDW private data about the scan. While fdw_private is * fdw_private stores FDW private data about the scan. While fdw_private is
* not actually touched by the core code during normal operations, it's * not actually touched by the core code during normal operations, it's