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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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29
src/include/nodes/execnodes.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: execnodes.h,v 1.48 2000/08/24 03:29:13 tgl Exp $
* $Id: execnodes.h,v 1.49 2000/09/12 21:07:10 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -469,11 +469,18 @@ typedef CommonState JoinState;
/* ----------------
* NestLoopState information
*
* NeedNewOuter true if need new outer tuple on next call
* MatchedOuter true if found a join match for current outer tuple
* NullInnerTupleSlot prepared null tuple for left outer joins
* ----------------
*/
typedef struct NestLoopState
{
JoinState jstate; /* its first field is NodeTag */
bool nl_NeedNewOuter;
bool nl_MatchedOuter;
TupleTableSlot *nl_NullInnerTupleSlot;
} NestLoopState;
/* ----------------
@ -482,7 +489,13 @@ typedef struct NestLoopState
* OuterSkipQual outerKey1 < innerKey1 ...
* InnerSkipQual outerKey1 > innerKey1 ...
* JoinState current "state" of join. see executor.h
* MatchedOuter true if found a join match for current outer tuple
* MatchedInner true if found a join match for current inner tuple
* OuterTupleSlot pointer to slot in tuple table for cur outer tuple
* InnerTupleSlot pointer to slot in tuple table for cur inner tuple
* MarkedTupleSlot pointer to slot in tuple table for marked tuple
* NullOuterTupleSlot prepared null tuple for right outer joins
* NullInnerTupleSlot prepared null tuple for left outer joins
* ----------------
*/
typedef struct MergeJoinState
@ -491,7 +504,13 @@ typedef struct MergeJoinState
List *mj_OuterSkipQual;
List *mj_InnerSkipQual;
int mj_JoinState;
bool mj_MatchedOuter;
bool mj_MatchedInner;
TupleTableSlot *mj_OuterTupleSlot;
TupleTableSlot *mj_InnerTupleSlot;
TupleTableSlot *mj_MarkedTupleSlot;
TupleTableSlot *mj_NullOuterTupleSlot;
TupleTableSlot *mj_NullInnerTupleSlot;
} MergeJoinState;
/* ----------------
@ -506,6 +525,10 @@ typedef struct MergeJoinState
* hj_InnerHashKey the inner hash key in the hashjoin condition
* hj_OuterTupleSlot tuple slot for outer tuples
* hj_HashTupleSlot tuple slot for hashed tuples
* hj_NullInnerTupleSlot prepared null tuple for left outer joins
* hj_NeedNewOuter true if need new outer tuple on next call
* hj_MatchedOuter true if found a join match for current outer
* hj_hashdone true if hash-table-build phase is done
* ----------------
*/
typedef struct HashJoinState
@ -517,6 +540,10 @@ typedef struct HashJoinState
Node *hj_InnerHashKey;
TupleTableSlot *hj_OuterTupleSlot;
TupleTableSlot *hj_HashTupleSlot;
TupleTableSlot *hj_NullInnerTupleSlot;
bool hj_NeedNewOuter;
bool hj_MatchedOuter;
bool hj_hashdone;
} HashJoinState;