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Add final Motion earlier in grouping_planner for partial paths #142

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Merged
my-ship-it merged 1 commit into from
Oct 12, 2023
Merged

Add final Motion earlier in grouping_planner for partial paths #142

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20 changes: 20 additions & 0 deletions src/backend/optimizer/plan/planner.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2579,6 +2579,26 @@ grouping_planner(PlannerInfo *root, double tuple_fraction)
offset_est, count_est);
}

/*
* Like pathlist:
* Take Motion cost into accout before standard_planner().
* Don't foo by one-phase LIMIT with partial_path here.
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*/
if ((CdbPathLocus_IsHashed(root->final_locus) ||
CdbPathLocus_IsSingleQE(root->final_locus) ||
CdbPathLocus_IsEntry(root->final_locus) ||
CdbPathLocus_IsReplicated(root->final_locus)) &&
!root->glob->is_parallel_cursor)
{
Path *orig_path = partial_path;

partial_path = cdbpath_create_motion_path(root, orig_path,
root->sort_pathkeys,
false,
root->final_locus);
if (!partial_path)
partial_path = orig_path;
}
add_partial_path(final_rel, partial_path);
}
}
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