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Comment update for join pushdown.

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Etsuro Fujita
This commit is contained in:
Robert Haas
2015-09-29 07:42:30 -04:00
parent d1b7c1ffe7
commit 758fcfdc01
1 changed files with 5 additions and 5 deletions
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10
src/backend/optimizer/util/pathnode.c
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@ -1449,13 +1449,13 @@ create_worktablescan_path(PlannerInfo *root, RelOptInfo *rel,
/* /*
* create_foreignscan_path * create_foreignscan_path
* Creates a path corresponding to a scan of a foreign table, * Creates a path corresponding to a scan of a foreign table or
* returning the pathnode. * a foreign join, returning the pathnode.
* *
* This function is never called from core Postgres; rather, it's expected * This function is never called from core Postgres; rather, it's expected
* to be called by the GetForeignPaths function of a foreign data wrapper. * to be called by the GetForeignPaths or GetForeignJoinPaths function of
* We make the FDW supply all fields of the path, since we do not have any * a foreign data wrapper. We make the FDW supply all fields of the path,
* way to calculate them in core. * since we do not have any way to calculate them in core.
*/ */
ForeignPath * ForeignPath *
create_foreignscan_path(PlannerInfo *root, RelOptInfo *rel, create_foreignscan_path(PlannerInfo *root, RelOptInfo *rel,