diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/fdwhandler.sgml | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/doc/src/sgml/fdwhandler.sgml b/doc/src/sgml/fdwhandler.sgml index 0ed3a47233d..9291b8f6d4b 100644 --- a/doc/src/sgml/fdwhandler.sgml +++ b/doc/src/sgml/fdwhandler.sgml @@ -359,7 +359,8 @@ void GetForeignUpperPaths(PlannerInfo *root, UpperRelationKind stage, RelOptInfo *input_rel, - RelOptInfo *output_rel); + RelOptInfo *output_rel, + void *extra); </programlisting> Create possible access paths for <firstterm>upper relation</firstterm> processing, which is the planner's term for all post-scan/join query processing, such @@ -379,7 +380,11 @@ GetForeignUpperPaths(PlannerInfo *root, currently being considered. <literal>output_rel</literal> is the upper relation that should receive paths representing computation of this step, and <literal>input_rel</literal> is the relation representing the input to this - step. (Note that <structname>ForeignPath</structname> paths added + step. The <literal>extra</literal> parameter provides additional details, + currently, it is set only for <literal>UPPERREL_PARTIAL_GROUP_AGG</> + or <literal>UPPERREL_GROUP_AGG</literal>, in which case it points to a + <literal>GroupPathExtraData</> structure. + (Note that <structname>ForeignPath</structname> paths added to <literal>output_rel</literal> would typically not have any direct dependency on paths of the <literal>input_rel</literal>, since their processing is expected to be done externally. However, examining paths previously generated for |