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First cut at implementing IN (and NOT IN) via hashtables. There is

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more to be done yet, but this is a good start.
This commit is contained in:
Tom Lane
2003-01-12 04:03:34 +00:00
parent 3e54e26bcf
commit 19b886332a
7 changed files with 712 additions and 132 deletions
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56
src/backend/executor/execUtils.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.94 2002/12/18 00:14:47 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.95 2003/01/12 04:03:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -475,29 +475,51 @@ ExecGetResultType(PlanState *planstate)
return slot->ttc_tupleDescriptor;
}
/* ----------------
* ExecBuildProjectionInfo
*
* Build a ProjectionInfo node for evaluating the given tlist in the given
* econtext, and storing the result into the tuple slot. (Caller must have
* ensured that tuple slot has a descriptor matching the tlist!) Note that
* the given tlist should be a list of ExprState nodes, not Expr nodes.
* ----------------
*/
ProjectionInfo *
ExecBuildProjectionInfo(List *targetList,
ExprContext *econtext,
TupleTableSlot *slot)
{
ProjectionInfo *projInfo = makeNode(ProjectionInfo);
int len;
len = ExecTargetListLength(targetList);
projInfo->pi_targetlist = targetList;
projInfo->pi_exprContext = econtext;
projInfo->pi_slot = slot;
if (len > 0)
{
projInfo->pi_tupValues = (Datum *) palloc(len * sizeof(Datum));
projInfo->pi_tupNulls = (char *) palloc(len * sizeof(char));
projInfo->pi_itemIsDone = (ExprDoneCond *) palloc(len * sizeof(ExprDoneCond));
}
return projInfo;
}
/* ----------------
* ExecAssignProjectionInfo
forms the projection information from the node's targetlist
*
* forms the projection information from the node's targetlist
* ----------------
*/
void
ExecAssignProjectionInfo(PlanState *planstate)
{
ProjectionInfo *projInfo;
List *targetList;
int len;
targetList = planstate->targetlist;
len = ExecTargetListLength(targetList);
projInfo = makeNode(ProjectionInfo);
projInfo->pi_targetlist = targetList;
projInfo->pi_len = len;
projInfo->pi_tupValue = (len <= 0) ? NULL : (Datum *) palloc(sizeof(Datum) * len);
projInfo->pi_exprContext = planstate->ps_ExprContext;
projInfo->pi_slot = planstate->ps_ResultTupleSlot;
planstate->ps_ProjInfo = projInfo;
planstate->ps_ProjInfo =
ExecBuildProjectionInfo(planstate->targetlist,
planstate->ps_ExprContext,
planstate->ps_ResultTupleSlot);
}