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Directly modify foreign tables.

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postgres_fdw can now sent an UPDATE or DELETE statement directly to
the foreign server in simple cases, rather than sending a SELECT FOR
UPDATE statement and then updating or deleting rows one-by-one.

Etsuro Fujita, reviewed by Rushabh Lathia, Shigeru Hanada, Kyotaro
Horiguchi, Albe Laurenz, Thom Brown, and me.
This commit is contained in:
Robert Haas
2016-03-18 13:48:58 -04:00
parent 3422feccca
commit 0bf3ae88af
21 changed files with 1515 additions and 125 deletions
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20
src/include/foreign/fdwapi.h
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@@ -97,6 +97,18 @@ typedef void (*EndForeignModify_function) (EState *estate,
typedef int (*IsForeignRelUpdatable_function) (Relation rel);
typedef bool (*PlanDirectModify_function) (PlannerInfo *root,
ModifyTable *plan,
Index resultRelation,
int subplan_index);
typedef void (*BeginDirectModify_function) (ForeignScanState *node,
int eflags);
typedef TupleTableSlot *(*IterateDirectModify_function) (ForeignScanState *node);
typedef void (*EndDirectModify_function) (ForeignScanState *node);
typedef RowMarkType (*GetForeignRowMarkType_function) (RangeTblEntry *rte,
LockClauseStrength strength);
@@ -114,6 +126,9 @@ typedef void (*ExplainForeignModify_function) (ModifyTableState *mtstate,
int subplan_index,
struct ExplainState *es);
typedef void (*ExplainDirectModify_function) (ForeignScanState *node,
struct ExplainState *es);
typedef int (*AcquireSampleRowsFunc) (Relation relation, int elevel,
HeapTuple *rows, int targrows,
double *totalrows,
@@ -181,6 +196,10 @@ typedef struct FdwRoutine
ExecForeignDelete_function ExecForeignDelete;
EndForeignModify_function EndForeignModify;
IsForeignRelUpdatable_function IsForeignRelUpdatable;
PlanDirectModify_function PlanDirectModify;
BeginDirectModify_function BeginDirectModify;
IterateDirectModify_function IterateDirectModify;
EndDirectModify_function EndDirectModify;
/* Functions for SELECT FOR UPDATE/SHARE row locking */
GetForeignRowMarkType_function GetForeignRowMarkType;
@@ -190,6 +209,7 @@ typedef struct FdwRoutine
/* Support functions for EXPLAIN */
ExplainForeignScan_function ExplainForeignScan;
ExplainForeignModify_function ExplainForeignModify;
ExplainDirectModify_function ExplainDirectModify;
/* Support functions for ANALYZE */
AnalyzeForeignTable_function AnalyzeForeignTable;