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Add some additional core functions to support join pushdown for FDWs.

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GetExistingLocalJoinPath() is useful for handling EvalPlanQual rechecks
properly, and GetUserMappingById() is needed to make sure you're using
the right credentials.

Shigeru Hanada, Etsuro Fujita, Ashutosh Bapat, Robert Haas
This commit is contained in:
Robert Haas
2016-02-04 17:05:09 -05:00
parent c1772ad922
commit a104a017fc
4 changed files with 196 additions and 2 deletions
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1
src/include/foreign/fdwapi.h
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@@ -202,5 +202,6 @@ extern FdwRoutine *GetFdwRoutineByRelId(Oid relid);
extern FdwRoutine *GetFdwRoutineForRelation(Relation relation, bool makecopy);
extern bool IsImportableForeignTable(const char *tablename,
ImportForeignSchemaStmt *stmt);
extern Path *GetExistingLocalJoinPath(RelOptInfo *joinrel);
#endif /* FDWAPI_H */

1
src/include/foreign/foreign.h
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@@ -73,6 +73,7 @@ extern ForeignServer *GetForeignServer(Oid serverid);
extern ForeignServer *GetForeignServerByName(const char *name, bool missing_ok);
extern UserMapping *GetUserMapping(Oid userid, Oid serverid);
extern Oid GetUserMappingId(Oid userid, Oid serverid);
extern UserMapping *GetUserMappingById(Oid umid);
extern ForeignDataWrapper *GetForeignDataWrapper(Oid fdwid);
extern ForeignDataWrapper *GetForeignDataWrapperByName(const char *name,
bool missing_ok);