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Commite0e7b8f

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Remove parallel-safety check from GetExistingLocalJoinPath.
Commita104a01 has this check becauseI added it to the submitted patch before commit, but that was entirelywrongheaded, as explained to me by Ashutosh Bapat, who also wrote thispatch.
1 parent63f39b9 commite0e7b8f

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2 files changed

+8
-10
lines changed

2 files changed

+8
-10
lines changed

‎doc/src/sgml/fdwhandler.sgml

Lines changed: 4 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -349,11 +349,10 @@ GetExistingLocalJoinPath(RelOptInfo *joinrel)
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The function returns copy of a local join path, which can be converted
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into an alternative local join plan, which may be useful when
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implementing a <literal>RecheckForeignScan</> method. The function
352-
searches for a parallel-safe, unparameterized path in the
353-
<literal>pathlist</> of given <literal>joinrel</>. If it does not find
354-
such a path, it returns NULL, in which case a foreign data wrapper may
355-
build the local path by itself or may choose not to create access paths
356-
for that join.
352+
searches for an unparameterized path in the <literal>pathlist</> of given
353+
<literal>joinrel</>. If it does not find such a path, it returns NULL, in
354+
which case a foreign data wrapper may build the local path by itself or
355+
may choose not to create access paths for that join.
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</para>
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</sect2>

‎src/backend/foreign/foreign.c

Lines changed: 4 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -801,9 +801,8 @@ get_foreign_server_oid(const char *servername, bool missing_ok)
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*
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* Since the plan created using this path will presumably only be used to
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* execute EPQ checks, efficiency of the path is not a concern. But since the
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* list passed is expected to be from RelOptInfo, it's anyway sorted by total
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* cost and hence we are likely to choose the most efficient path, which is
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* all for the best.
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* path list in RelOptInfo is anyway sorted by total cost we are likely to
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* choose the most efficient path, which is all for the best.
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*/
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externPath*
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GetExistingLocalJoinPath(RelOptInfo*joinrel)
@@ -817,8 +816,8 @@ GetExistingLocalJoinPath(RelOptInfo *joinrel)
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Path*path= (Path*)lfirst(lc);
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JoinPath*joinpath=NULL;
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820-
/* Skip parameterisedor non-parallel-safepaths. */
821-
if (path->param_info!=NULL|| !path->parallel_safe)
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/* Skip parameterised paths. */
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if (path->param_info!=NULL)
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continue;
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switch (path->pathtype)

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