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Expand run-time partition pruning to work with MergeAppend

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This expands the support for the run-time partition pruning which was added
for Append in 499be013de to also allow unneeded subnodes of a MergeAppend
to be removed.

Author: David Rowley
Discussion: https://www.postgresql.org/message-id/CAKJS1f_F_V8D7Wu-HVdnH7zCUxhoGK8XhLLtd%3DCu85qDZzXrgg%40mail.gmail.com
This commit is contained in:
Heikki Linnakangas
2018-07-19 13:49:43 +03:00
parent b33ef397a1
commit 5220bb7533
11 changed files with 356 additions and 35 deletions
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src/backend/nodes/copyfuncs.c
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@@ -273,6 +273,7 @@ _copyMergeAppend(const MergeAppend *from)
COPY_POINTER_FIELD(sortOperators, from->numCols * sizeof(Oid));
COPY_POINTER_FIELD(collations, from->numCols * sizeof(Oid));
COPY_POINTER_FIELD(nullsFirst, from->numCols * sizeof(bool));
COPY_NODE_FIELD(part_prune_infos);
return newnode;
}