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First cut at full support for OUTER JOINs. There are still a few loose

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ends to clean up (see my message of same date to pghackers), but mostly
it works.  INITDB REQUIRED!
This commit is contained in:
Tom Lane
2000-09-12 21:07:18 +00:00
parent b5c0ab278b
commit ed5003c584
93 changed files with 6386 additions and 4262 deletions
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87
src/backend/executor/execTuples.c
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@@ -15,7 +15,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execTuples.c,v 1.38 2000/07/12 02:37:02 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execTuples.c,v 1.39 2000/09/12 21:06:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -46,11 +46,10 @@
* type of tuple in a slot
*
* CONVENIENCE INITIALIZATION ROUTINES
* ExecInitResultTupleSlot \ convience routines to initialize
* ExecInitResultTupleSlot \ convenience routines to initialize
* ExecInitScanTupleSlot \ the various tuple slots for nodes
* ExecInitMarkedTupleSlot / which store copies of tuples.
* ExecInitOuterTupleSlot /
* ExecInitHashTupleSlot /
* ExecInitExtraTupleSlot / which store copies of tuples.
* ExecInitNullTupleSlot /
*
* old routines:
* ExecGetTupType - get type of tuple returned by this node
@@ -560,10 +559,11 @@ ExecSlotDescriptorIsNew(TupleTableSlot *slot) /* slot to inspect */
* ----------------------------------------------------------------
*/
/* --------------------------------
* ExecInit{Result,Scan,Raw,Marked,Outer,Hash}TupleSlot
* ExecInit{Result,Scan,Extra}TupleSlot
*
* These are convenience routines to initialize the specfied slot
* in nodes inheriting the appropriate state.
* These are convenience routines to initialize the specified slot
* in nodes inheriting the appropriate state. ExecInitExtraTupleSlot
* is used for initializing special-purpose slots.
* --------------------------------
*/
#define INIT_SLOT_DEFS \
@@ -583,7 +583,7 @@ ExecInitResultTupleSlot(EState *estate, CommonState *commonstate)
{
INIT_SLOT_DEFS;
INIT_SLOT_ALLOC;
commonstate->cs_ResultTupleSlot = (TupleTableSlot *) slot;
commonstate->cs_ResultTupleSlot = slot;
}
/* ----------------
@@ -595,50 +595,51 @@ ExecInitScanTupleSlot(EState *estate, CommonScanState *commonscanstate)
{
INIT_SLOT_DEFS;
INIT_SLOT_ALLOC;
commonscanstate->css_ScanTupleSlot = (TupleTableSlot *) slot;
}
#ifdef NOT_USED
/* ----------------
* ExecInitMarkedTupleSlot
* ----------------
*/
void
ExecInitMarkedTupleSlot(EState *estate, MergeJoinState *mergestate)
{
INIT_SLOT_DEFS;
INIT_SLOT_ALLOC;
mergestate->mj_MarkedTupleSlot = (TupleTableSlot *) slot;
}
#endif
/* ----------------
* ExecInitOuterTupleSlot
* ----------------
*/
void
ExecInitOuterTupleSlot(EState *estate, HashJoinState *hashstate)
{
INIT_SLOT_DEFS;
INIT_SLOT_ALLOC;
hashstate->hj_OuterTupleSlot = slot;
commonscanstate->css_ScanTupleSlot = slot;
}
/* ----------------
* ExecInitHashTupleSlot
* ExecInitExtraTupleSlot
* ----------------
*/
#ifdef NOT_USED
void
ExecInitHashTupleSlot(EState *estate, HashJoinState *hashstate)
TupleTableSlot *
ExecInitExtraTupleSlot(EState *estate)
{
INIT_SLOT_DEFS;
INIT_SLOT_ALLOC;
hashstate->hj_HashTupleSlot = slot;
return slot;
}
/* ----------------
* ExecInitNullTupleSlot
*
* Build a slot containing an all-nulls tuple of the given type.
* This is used as a substitute for an input tuple when performing an
* outer join.
* ----------------
*/
TupleTableSlot *
ExecInitNullTupleSlot(EState *estate, TupleDesc tupType)
{
TupleTableSlot* slot = ExecInitExtraTupleSlot(estate);
/*
* Since heap_getattr() will treat attributes beyond a tuple's t_natts
* as being NULL, we can make an all-nulls tuple just by making it be of
* zero length. However, the slot descriptor must match the real tupType.
*/
HeapTuple nullTuple;
Datum values[1];
char nulls[1];
static struct tupleDesc NullTupleDesc; /* we assume this inits to
* zeroes */
ExecSetSlotDescriptor(slot, tupType);
nullTuple = heap_formtuple(&NullTupleDesc, values, nulls);
return ExecStoreTuple(nullTuple, slot, InvalidBuffer, true);
}
#endif
static TupleTableSlot *
NodeGetResultTupleSlot(Plan *node)