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Phase 3 of read-only-plans project: ExecInitExpr now builds expression

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execution state trees, and ExecEvalExpr takes an expression state tree
not an expression plan tree.  The plan tree is now read-only as far as
the executor is concerned.  Next step is to begin actually exploiting
this property.
This commit is contained in:
Tom Lane
2002-12-13 19:46:01 +00:00
parent 77b7a740f9
commit 3a4f7dde16
49 changed files with 993 additions and 815 deletions
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31
src/backend/executor/nodeHashjoin.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/nodeHashjoin.c,v 1.43 2002/12/05 15:50:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/nodeHashjoin.c,v 1.44 2002/12/13 19:45:52 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -169,7 +169,7 @@ ExecHashJoin(HashJoinState *node)
* for this tuple from the hash table
*/
node->hj_CurBucketNo = ExecHashGetBucket(hashtable, econtext,
outerkeys);
outerkeys);
node->hj_CurTuple = NULL;
/*
@ -302,6 +302,7 @@ ExecInitHashJoin(HashJoin *node, EState *estate)
HashJoinState *hjstate;
Plan *outerNode;
Hash *hashNode;
List *hclauses;
List *hcl;
/*
@ -322,17 +323,17 @@ ExecInitHashJoin(HashJoin *node, EState *estate)
* initialize child expressions
*/
hjstate->js.ps.targetlist = (List *)
ExecInitExpr((Node *) node->join.plan.targetlist,
ExecInitExpr((Expr *) node->join.plan.targetlist,
(PlanState *) hjstate);
hjstate->js.ps.qual = (List *)
ExecInitExpr((Node *) node->join.plan.qual,
ExecInitExpr((Expr *) node->join.plan.qual,
(PlanState *) hjstate);
hjstate->js.jointype = node->join.jointype;
hjstate->js.joinqual = (List *)
ExecInitExpr((Node *) node->join.joinqual,
ExecInitExpr((Expr *) node->join.joinqual,
(PlanState *) hjstate);
hjstate->hashclauses = (List *)
ExecInitExpr((Node *) node->hashclauses,
ExecInitExpr((Expr *) node->hashclauses,
(PlanState *) hjstate);
/*
@ -402,15 +403,23 @@ ExecInitHashJoin(HashJoin *node, EState *estate)
/*
* The planner already made a list of the inner hashkeys for us,
* but we also need a list of the outer hashkeys.
* but we also need a list of the outer hashkeys. Each list of
* exprs must then be prepared for execution.
*/
hjstate->hj_InnerHashKeys = hashNode->hashkeys;
hjstate->hj_OuterHashKeys = NIL;
hjstate->hj_InnerHashKeys = (List *)
ExecInitExpr((Expr *) hashNode->hashkeys,
innerPlanState(hjstate));
((HashState *) innerPlanState(hjstate))->hashkeys =
hjstate->hj_InnerHashKeys;
hclauses = NIL;
foreach(hcl, node->hashclauses)
{
hjstate->hj_OuterHashKeys = lappend(hjstate->hj_OuterHashKeys,
get_leftop(lfirst(hcl)));
hclauses = lappend(hclauses, get_leftop(lfirst(hcl)));
}
hjstate->hj_OuterHashKeys = (List *)
ExecInitExpr((Expr *) hclauses,
(PlanState *) hjstate);
hjstate->js.ps.ps_OuterTupleSlot = NULL;
hjstate->js.ps.ps_TupFromTlist = false;