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Support writable foreign tables.

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This patch adds the core-system infrastructure needed to support updates
on foreign tables, and extends contrib/postgres_fdw to allow updates
against remote Postgres servers.  There's still a great deal of room for
improvement in optimization of remote updates, but at least there's basic
functionality there now.

KaiGai Kohei, reviewed by Alexander Korotkov and Laurenz Albe, and rather
heavily revised by Tom Lane.
This commit is contained in:
Tom Lane
2013-03-10 14:14:53 -04:00
parent 7f49a67f95
commit 21734d2fb8
29 changed files with 3672 additions and 347 deletions
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7
src/include/nodes/execnodes.h
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@ -270,7 +270,8 @@ typedef struct ProjectionInfo
* resultSlot: tuple slot used to hold cleaned tuple.
* junkAttNo: not used by junkfilter code. Can be used by caller
* to remember the attno of a specific junk attribute
* (execMain.c stores the "ctid" attno here).
* (nodeModifyTable.c keeps the "ctid" or "wholerow"
* attno here).
* ----------------
*/
typedef struct JunkFilter
@ -300,6 +301,8 @@ typedef struct JunkFilter
* TrigFunctions cached lookup info for trigger functions
* TrigWhenExprs array of trigger WHEN expr states
* TrigInstrument optional runtime measurements for triggers
* FdwRoutine FDW callback functions, if foreign table
* FdwState available to save private state of FDW
* ConstraintExprs array of constraint-checking expr states
* junkFilter for removing junk attributes from tuples
* projectReturning for computing a RETURNING list
@ -317,6 +320,8 @@ typedef struct ResultRelInfo
FmgrInfo *ri_TrigFunctions;
List **ri_TrigWhenExprs;
Instrumentation *ri_TrigInstrument;
struct FdwRoutine *ri_FdwRoutine;
void *ri_FdwState;
List **ri_ConstraintExprs;
JunkFilter *ri_junkFilter;
ProjectionInfo *ri_projectReturning;