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https://github.com/postgres/postgres.git
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a344a6e7b5
SELECT a FROM t1 tx (a); Allow join syntax, including queries like SELECT * FROM t1 NATURAL JOIN t2; Update RTE structure to hold column aliases in an Attr structure.
1724 lines
35 KiB
C
1724 lines
35 KiB
C
/*-------------------------------------------------------------------------
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*
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* copyfuncs.c
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* Copy functions for Postgres tree nodes.
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*
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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.105 2000/02/15 03:37:08 thomas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "optimizer/planmain.h"
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#include "optimizer/subselect.h"
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/*
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* Node_Copy
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* a macro to simplify calling of copyObject on the specified field
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*/
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#define Node_Copy(from, newnode, field) \
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((newnode)->field = copyObject((from)->field))
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/*
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* listCopy
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* This copy function only copies the "cons-cells" of the list, not the
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* pointed-to objects. (Use copyObject if you want a "deep" copy.)
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*
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* We also use this function for copying lists of integers, which is
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* grotty but unlikely to break --- it could fail if sizeof(pointer)
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* is less than sizeof(int), but I don't know any such machines...
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*
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* Note that copyObject will surely coredump if applied to a list
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* of integers!
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*/
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List *
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listCopy(List *list)
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{
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List *newlist,
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*l,
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*nl;
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/* rather ugly coding for speed... */
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if (list == NIL)
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return NIL;
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newlist = nl = lcons(lfirst(list), NIL);
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foreach(l, lnext(list))
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{
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lnext(nl) = lcons(lfirst(l), NIL);
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nl = lnext(nl);
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}
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return newlist;
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}
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/* ****************************************************************
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* plannodes.h copy functions
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* ****************************************************************
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*/
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/* ----------------
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* CopyPlanFields
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*
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* This function copies the fields of the Plan node. It is used by
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* all the copy functions for classes which inherit from Plan.
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* ----------------
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*/
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static void
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CopyPlanFields(Plan *from, Plan *newnode)
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{
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newnode->cost = from->cost;
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newnode->plan_rows = from->plan_rows;
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newnode->plan_width = from->plan_width;
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/* state is NOT copied */
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newnode->targetlist = copyObject(from->targetlist);
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newnode->qual = copyObject(from->qual);
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newnode->lefttree = copyObject(from->lefttree);
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newnode->righttree = copyObject(from->righttree);
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newnode->extParam = listCopy(from->extParam);
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newnode->locParam = listCopy(from->locParam);
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newnode->chgParam = listCopy(from->chgParam);
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Node_Copy(from, newnode, initPlan);
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if (from->subPlan != NIL)
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newnode->subPlan = nconc(SS_pull_subplan((Node *) newnode->targetlist),
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SS_pull_subplan((Node *) newnode->qual));
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else
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newnode->subPlan = NIL;
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newnode->nParamExec = from->nParamExec;
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}
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/* ----------------
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* _copyPlan
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* ----------------
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*/
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static Plan *
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_copyPlan(Plan *from)
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{
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Plan *newnode = makeNode(Plan);
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/* ----------------
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* copy the node superclass fields
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* ----------------
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*/
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CopyPlanFields(from, newnode);
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return newnode;
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}
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/* ----------------
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* _copyResult
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* ----------------
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*/
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static Result *
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_copyResult(Result *from)
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{
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Result *newnode = makeNode(Result);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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/* ----------------
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* copy remainder of node
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* ----------------
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*/
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Node_Copy(from, newnode, resconstantqual);
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/*
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* We must add subplans in resconstantqual to the new plan's subPlan
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* list
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*/
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if (from->plan.subPlan != NIL)
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newnode->plan.subPlan = nconc(newnode->plan.subPlan,
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SS_pull_subplan(newnode->resconstantqual));
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return newnode;
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}
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/* ----------------
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* _copyAppend
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* ----------------
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*/
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static Append *
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_copyAppend(Append *from)
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{
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Append *newnode = makeNode(Append);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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/* ----------------
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* copy remainder of node
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* ----------------
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*/
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Node_Copy(from, newnode, appendplans);
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Node_Copy(from, newnode, unionrtables);
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newnode->inheritrelid = from->inheritrelid;
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Node_Copy(from, newnode, inheritrtable);
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return newnode;
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}
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/* ----------------
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* CopyScanFields
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*
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* This function copies the fields of the Scan node. It is used by
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* all the copy functions for classes which inherit from Scan.
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* ----------------
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*/
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static void
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CopyScanFields(Scan *from, Scan *newnode)
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{
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newnode->scanrelid = from->scanrelid;
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return;
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}
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/* ----------------
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* _copyScan
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* ----------------
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*/
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static Scan *
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_copyScan(Scan *from)
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{
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Scan *newnode = makeNode(Scan);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyScanFields((Scan *) from, (Scan *) newnode);
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return newnode;
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}
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/* ----------------
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* _copySeqScan
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* ----------------
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*/
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static SeqScan *
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_copySeqScan(SeqScan *from)
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{
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SeqScan *newnode = makeNode(SeqScan);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyScanFields((Scan *) from, (Scan *) newnode);
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return newnode;
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}
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/* ----------------
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* _copyIndexScan
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* ----------------
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*/
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static IndexScan *
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_copyIndexScan(IndexScan *from)
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{
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IndexScan *newnode = makeNode(IndexScan);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyScanFields((Scan *) from, (Scan *) newnode);
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/* ----------------
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* copy remainder of node
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* ----------------
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*/
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newnode->indxid = listCopy(from->indxid);
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Node_Copy(from, newnode, indxqual);
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Node_Copy(from, newnode, indxqualorig);
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newnode->indxorderdir = from->indxorderdir;
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return newnode;
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}
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/* ----------------
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* _copyTidScan
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* ----------------
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*/
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static TidScan *
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_copyTidScan(TidScan *from)
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{
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TidScan *newnode = makeNode(TidScan);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyScanFields((Scan *) from, (Scan *) newnode);
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/* ----------------
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* copy remainder of node
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* ----------------
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*/
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newnode->needRescan = from->needRescan;
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Node_Copy(from, newnode, tideval);
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return newnode;
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}
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/* ----------------
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* CopyJoinFields
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*
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* This function copies the fields of the Join node. It is used by
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* all the copy functions for classes which inherit from Join.
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* ----------------
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*/
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static void
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CopyJoinFields(Join *from, Join *newnode)
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{
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/* nothing extra */
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return;
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}
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/* ----------------
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* _copyJoin
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* ----------------
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*/
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static Join *
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_copyJoin(Join *from)
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{
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Join *newnode = makeNode(Join);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyJoinFields(from, newnode);
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return newnode;
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}
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/* ----------------
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* _copyNestLoop
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* ----------------
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*/
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static NestLoop *
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_copyNestLoop(NestLoop *from)
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{
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NestLoop *newnode = makeNode(NestLoop);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyJoinFields((Join *) from, (Join *) newnode);
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return newnode;
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}
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/* ----------------
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* _copyMergeJoin
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* ----------------
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*/
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static MergeJoin *
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_copyMergeJoin(MergeJoin *from)
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{
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MergeJoin *newnode = makeNode(MergeJoin);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyJoinFields((Join *) from, (Join *) newnode);
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/* ----------------
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* copy remainder of node
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* ----------------
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*/
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Node_Copy(from, newnode, mergeclauses);
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return newnode;
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}
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/* ----------------
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* _copyHashJoin
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* ----------------
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*/
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static HashJoin *
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_copyHashJoin(HashJoin *from)
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{
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HashJoin *newnode = makeNode(HashJoin);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyJoinFields((Join *) from, (Join *) newnode);
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/* ----------------
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* copy remainder of node
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* ----------------
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*/
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Node_Copy(from, newnode, hashclauses);
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newnode->hashjoinop = from->hashjoinop;
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return newnode;
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}
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/* ----------------
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* CopyNonameFields
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*
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* This function copies the fields of the Noname node. It is used by
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* all the copy functions for classes which inherit from Noname.
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* ----------------
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*/
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static void
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CopyNonameFields(Noname *from, Noname *newnode)
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{
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newnode->nonameid = from->nonameid;
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newnode->keycount = from->keycount;
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return;
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}
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/* ----------------
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* _copyNoname
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* ----------------
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*/
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static Noname *
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_copyNoname(Noname *from)
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{
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Noname *newnode = makeNode(Noname);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyNonameFields(from, newnode);
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return newnode;
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}
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/* ----------------
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* _copyMaterial
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* ----------------
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*/
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static Material *
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_copyMaterial(Material *from)
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{
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Material *newnode = makeNode(Material);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyNonameFields((Noname *) from, (Noname *) newnode);
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return newnode;
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}
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/* ----------------
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* _copySort
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* ----------------
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*/
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static Sort *
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_copySort(Sort *from)
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{
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Sort *newnode = makeNode(Sort);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyNonameFields((Noname *) from, (Noname *) newnode);
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return newnode;
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}
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/* ----------------
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* _copyGroup
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* ----------------
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*/
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static Group *
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_copyGroup(Group *from)
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{
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Group *newnode = makeNode(Group);
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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newnode->tuplePerGroup = from->tuplePerGroup;
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newnode->numCols = from->numCols;
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newnode->grpColIdx = palloc(from->numCols * sizeof(AttrNumber));
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memcpy(newnode->grpColIdx, from->grpColIdx, from->numCols * sizeof(AttrNumber));
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return newnode;
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}
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/* ---------------
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* _copyAgg
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* --------------
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*/
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static Agg *
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_copyAgg(Agg *from)
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{
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Agg *newnode = makeNode(Agg);
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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return newnode;
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}
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/* ---------------
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* _copyGroupClause
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* --------------
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*/
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static GroupClause *
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_copyGroupClause(GroupClause *from)
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{
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GroupClause *newnode = makeNode(GroupClause);
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newnode->tleSortGroupRef = from->tleSortGroupRef;
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newnode->sortop = from->sortop;
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return newnode;
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}
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/* ----------------
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* _copyUnique
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* ----------------
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*/
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static Unique *
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_copyUnique(Unique *from)
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{
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Unique *newnode = makeNode(Unique);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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CopyNonameFields((Noname *) from, (Noname *) newnode);
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/* ----------------
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* copy remainder of node
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* ----------------
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*/
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newnode->numCols = from->numCols;
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newnode->uniqColIdx = palloc(from->numCols * sizeof(AttrNumber));
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memcpy(newnode->uniqColIdx, from->uniqColIdx, from->numCols * sizeof(AttrNumber));
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return newnode;
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}
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/* ----------------
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* _copyHash
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* ----------------
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*/
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static Hash *
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_copyHash(Hash *from)
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{
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Hash *newnode = makeNode(Hash);
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/* ----------------
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* copy node superclass fields
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* ----------------
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*/
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CopyPlanFields((Plan *) from, (Plan *) newnode);
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/* ----------------
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* copy remainder of node
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* ----------------
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*/
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Node_Copy(from, newnode, hashkey);
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return newnode;
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}
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static SubPlan *
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_copySubPlan(SubPlan *from)
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{
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SubPlan *newnode = makeNode(SubPlan);
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Node_Copy(from, newnode, plan);
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newnode->plan_id = from->plan_id;
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Node_Copy(from, newnode, rtable);
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newnode->setParam = listCopy(from->setParam);
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newnode->parParam = listCopy(from->parParam);
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Node_Copy(from, newnode, sublink);
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/* do not copy execution state */
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newnode->shutdown = false;
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newnode->curTuple = NULL;
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return newnode;
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}
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|
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/* ****************************************************************
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* primnodes.h copy functions
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* ****************************************************************
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*/
|
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|
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/* ----------------
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* _copyResdom
|
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* ----------------
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*/
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static Resdom *
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_copyResdom(Resdom *from)
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{
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Resdom *newnode = makeNode(Resdom);
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newnode->resno = from->resno;
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newnode->restype = from->restype;
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newnode->restypmod = from->restypmod;
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if (from->resname != NULL)
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newnode->resname = pstrdup(from->resname);
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newnode->ressortgroupref = from->ressortgroupref;
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newnode->reskey = from->reskey;
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newnode->reskeyop = from->reskeyop;
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newnode->resjunk = from->resjunk;
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return newnode;
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}
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|
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static Fjoin *
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_copyFjoin(Fjoin *from)
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{
|
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Fjoin *newnode = makeNode(Fjoin);
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|
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/* ----------------
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* copy node superclass fields
|
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* ----------------
|
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*/
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newnode->fj_initialized = from->fj_initialized;
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newnode->fj_nNodes = from->fj_nNodes;
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|
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Node_Copy(from, newnode, fj_innerNode);
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|
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newnode->fj_results = (DatumPtr)
|
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palloc((from->fj_nNodes) * sizeof(Datum));
|
|
memmove(from->fj_results,
|
|
newnode->fj_results,
|
|
(from->fj_nNodes) * sizeof(Datum));
|
|
|
|
newnode->fj_alwaysDone = (BoolPtr)
|
|
palloc((from->fj_nNodes) * sizeof(bool));
|
|
memmove(from->fj_alwaysDone,
|
|
newnode->fj_alwaysDone,
|
|
(from->fj_nNodes) * sizeof(bool));
|
|
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyExpr
|
|
* ----------------
|
|
*/
|
|
static Expr *
|
|
_copyExpr(Expr *from)
|
|
{
|
|
Expr *newnode = makeNode(Expr);
|
|
|
|
/* ----------------
|
|
* copy node superclass fields
|
|
* ----------------
|
|
*/
|
|
newnode->typeOid = from->typeOid;
|
|
newnode->opType = from->opType;
|
|
|
|
Node_Copy(from, newnode, oper);
|
|
Node_Copy(from, newnode, args);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyVar
|
|
* ----------------
|
|
*/
|
|
static Var *
|
|
_copyVar(Var *from)
|
|
{
|
|
Var *newnode = makeNode(Var);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->varno = from->varno;
|
|
newnode->varattno = from->varattno;
|
|
newnode->vartype = from->vartype;
|
|
newnode->vartypmod = from->vartypmod;
|
|
newnode->varlevelsup = from->varlevelsup;
|
|
|
|
newnode->varnoold = from->varnoold;
|
|
newnode->varoattno = from->varoattno;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static Attr *
|
|
_copyAttr(Attr *from)
|
|
{
|
|
Attr *newnode = makeNode(Attr);
|
|
|
|
if (from->relname)
|
|
newnode->relname = pstrdup(from->relname);
|
|
Node_Copy(from, newnode, attrs);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyOper
|
|
* ----------------
|
|
*/
|
|
static Oper *
|
|
_copyOper(Oper *from)
|
|
{
|
|
Oper *newnode = makeNode(Oper);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->opno = from->opno;
|
|
newnode->opid = from->opid;
|
|
newnode->opresulttype = from->opresulttype;
|
|
newnode->opsize = from->opsize;
|
|
|
|
/*
|
|
* NOTE: shall we copy the cache structure or just the pointer ?
|
|
* Alternatively we can set 'op_fcache' to NULL, in which case the
|
|
* executor will initialize it when it needs it...
|
|
*/
|
|
newnode->op_fcache = from->op_fcache;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyConst
|
|
* ----------------
|
|
*/
|
|
static Const *
|
|
_copyConst(Const *from)
|
|
{
|
|
Const *newnode = makeNode(Const);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->consttype = from->consttype;
|
|
newnode->constlen = from->constlen;
|
|
|
|
if (from->constbyval || from->constisnull)
|
|
{
|
|
/* ----------------
|
|
* passed by value so just copy the datum.
|
|
* Also, don't try to copy struct when value is null!
|
|
* ----------------
|
|
*/
|
|
newnode->constvalue = from->constvalue;
|
|
}
|
|
else
|
|
{
|
|
/* ----------------
|
|
* not passed by value. datum contains a pointer.
|
|
* ----------------
|
|
*/
|
|
int length = from->constlen;
|
|
|
|
if (length == -1) /* variable-length type? */
|
|
length = VARSIZE(from->constvalue);
|
|
newnode->constvalue = PointerGetDatum(palloc(length));
|
|
memcpy(DatumGetPointer(newnode->constvalue),
|
|
DatumGetPointer(from->constvalue),
|
|
length);
|
|
}
|
|
|
|
newnode->constisnull = from->constisnull;
|
|
newnode->constbyval = from->constbyval;
|
|
newnode->constisset = from->constisset;
|
|
newnode->constiscast = from->constiscast;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyParam
|
|
* ----------------
|
|
*/
|
|
static Param *
|
|
_copyParam(Param *from)
|
|
{
|
|
Param *newnode = makeNode(Param);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->paramkind = from->paramkind;
|
|
newnode->paramid = from->paramid;
|
|
|
|
if (from->paramname != NULL)
|
|
newnode->paramname = pstrdup(from->paramname);
|
|
newnode->paramtype = from->paramtype;
|
|
Node_Copy(from, newnode, param_tlist);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyFunc
|
|
* ----------------
|
|
*/
|
|
static Func *
|
|
_copyFunc(Func *from)
|
|
{
|
|
Func *newnode = makeNode(Func);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->funcid = from->funcid;
|
|
newnode->functype = from->functype;
|
|
newnode->funcisindex = from->funcisindex;
|
|
newnode->funcsize = from->funcsize;
|
|
newnode->func_fcache = from->func_fcache;
|
|
Node_Copy(from, newnode, func_tlist);
|
|
Node_Copy(from, newnode, func_planlist);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyAggref
|
|
* ----------------
|
|
*/
|
|
static Aggref *
|
|
_copyAggref(Aggref *from)
|
|
{
|
|
Aggref *newnode = makeNode(Aggref);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->aggname = pstrdup(from->aggname);
|
|
newnode->basetype = from->basetype;
|
|
newnode->aggtype = from->aggtype;
|
|
Node_Copy(from, newnode, target);
|
|
newnode->usenulls = from->usenulls;
|
|
newnode->aggstar = from->aggstar;
|
|
newnode->aggdistinct = from->aggdistinct;
|
|
newnode->aggno = from->aggno; /* probably not needed */
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copySubLink
|
|
* ----------------
|
|
*/
|
|
static SubLink *
|
|
_copySubLink(SubLink *from)
|
|
{
|
|
SubLink *newnode = makeNode(SubLink);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->subLinkType = from->subLinkType;
|
|
newnode->useor = from->useor;
|
|
Node_Copy(from, newnode, lefthand);
|
|
Node_Copy(from, newnode, oper);
|
|
Node_Copy(from, newnode, subselect);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyCaseExpr
|
|
* ----------------
|
|
*/
|
|
static CaseExpr *
|
|
_copyCaseExpr(CaseExpr *from)
|
|
{
|
|
CaseExpr *newnode = makeNode(CaseExpr);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->casetype = from->casetype;
|
|
|
|
Node_Copy(from, newnode, arg);
|
|
Node_Copy(from, newnode, args);
|
|
Node_Copy(from, newnode, defresult);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyCaseWhen
|
|
* ----------------
|
|
*/
|
|
static CaseWhen *
|
|
_copyCaseWhen(CaseWhen *from)
|
|
{
|
|
CaseWhen *newnode = makeNode(CaseWhen);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
Node_Copy(from, newnode, expr);
|
|
Node_Copy(from, newnode, result);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static Array *
|
|
_copyArray(Array *from)
|
|
{
|
|
Array *newnode = makeNode(Array);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->arrayelemtype = from->arrayelemtype;
|
|
newnode->arrayelemlength = from->arrayelemlength;
|
|
newnode->arrayelembyval = from->arrayelembyval;
|
|
newnode->arrayndim = from->arrayndim;
|
|
newnode->arraylow = from->arraylow;
|
|
newnode->arrayhigh = from->arrayhigh;
|
|
newnode->arraylen = from->arraylen;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static ArrayRef *
|
|
_copyArrayRef(ArrayRef *from)
|
|
{
|
|
ArrayRef *newnode = makeNode(ArrayRef);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->refattrlength = from->refattrlength;
|
|
newnode->refelemlength = from->refelemlength;
|
|
newnode->refelemtype = from->refelemtype;
|
|
newnode->refelembyval = from->refelembyval;
|
|
|
|
Node_Copy(from, newnode, refupperindexpr);
|
|
Node_Copy(from, newnode, reflowerindexpr);
|
|
Node_Copy(from, newnode, refexpr);
|
|
Node_Copy(from, newnode, refassgnexpr);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ****************************************************************
|
|
* relation.h copy functions
|
|
* ****************************************************************
|
|
*/
|
|
|
|
/* ----------------
|
|
* _copyRelOptInfo
|
|
* ----------------
|
|
*/
|
|
/*
|
|
* when you change this, also make sure to fix up xfunc_copyRelOptInfo in
|
|
* planner/path/xfunc.c accordingly!!!
|
|
* -- JMH, 8/2/93
|
|
*/
|
|
static RelOptInfo *
|
|
_copyRelOptInfo(RelOptInfo *from)
|
|
{
|
|
RelOptInfo *newnode = makeNode(RelOptInfo);
|
|
|
|
newnode->relids = listCopy(from->relids);
|
|
|
|
newnode->rows = from->rows;
|
|
newnode->width = from->width;
|
|
|
|
Node_Copy(from, newnode, targetlist);
|
|
Node_Copy(from, newnode, pathlist);
|
|
/* XXX cheapestpath should point to a member of pathlist? */
|
|
Node_Copy(from, newnode, cheapestpath);
|
|
newnode->pruneable = from->pruneable;
|
|
|
|
newnode->indexed = from->indexed;
|
|
newnode->pages = from->pages;
|
|
newnode->tuples = from->tuples;
|
|
|
|
Node_Copy(from, newnode, baserestrictinfo);
|
|
Node_Copy(from, newnode, joininfo);
|
|
Node_Copy(from, newnode, innerjoin);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyIndexOptInfo
|
|
* ----------------
|
|
*/
|
|
static IndexOptInfo *
|
|
_copyIndexOptInfo(IndexOptInfo *from)
|
|
{
|
|
IndexOptInfo *newnode = makeNode(IndexOptInfo);
|
|
int i,
|
|
len;
|
|
|
|
newnode->indexoid = from->indexoid;
|
|
newnode->pages = from->pages;
|
|
newnode->tuples = from->tuples;
|
|
|
|
if (from->classlist)
|
|
{
|
|
for (len = 0; from->classlist[len] != 0; len++)
|
|
;
|
|
newnode->classlist = (Oid *) palloc(sizeof(Oid) * (len + 1));
|
|
for (i = 0; i < len; i++)
|
|
newnode->classlist[i] = from->classlist[i];
|
|
newnode->classlist[len] = 0;
|
|
}
|
|
|
|
if (from->indexkeys)
|
|
{
|
|
for (len = 0; from->indexkeys[len] != 0; len++)
|
|
;
|
|
newnode->indexkeys = (int *) palloc(sizeof(int) * (len + 1));
|
|
for (i = 0; i < len; i++)
|
|
newnode->indexkeys[i] = from->indexkeys[i];
|
|
newnode->indexkeys[len] = 0;
|
|
}
|
|
|
|
if (from->ordering)
|
|
{
|
|
for (len = 0; from->ordering[len] != 0; len++)
|
|
;
|
|
newnode->ordering = (Oid *) palloc(sizeof(Oid) * (len + 1));
|
|
for (i = 0; i < len; i++)
|
|
newnode->ordering[i] = from->ordering[i];
|
|
newnode->ordering[len] = 0;
|
|
}
|
|
|
|
newnode->relam = from->relam;
|
|
newnode->amcostestimate = from->amcostestimate;
|
|
newnode->indproc = from->indproc;
|
|
Node_Copy(from, newnode, indpred);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* CopyPathFields
|
|
*
|
|
* This function copies the fields of the Path node. It is used by
|
|
* all the copy functions for classes which inherit from Path.
|
|
* ----------------
|
|
*/
|
|
static void
|
|
CopyPathFields(Path *from, Path *newnode)
|
|
{
|
|
/*
|
|
* Modify the next line, since it causes the copying to cycle (i.e.
|
|
* the parent points right back here! -- JMH, 7/7/92. Old version:
|
|
* Node_Copy(from, newnode, parent);
|
|
*/
|
|
newnode->parent = from->parent;
|
|
|
|
newnode->path_cost = from->path_cost;
|
|
|
|
newnode->pathtype = from->pathtype;
|
|
|
|
Node_Copy(from, newnode, pathkeys);
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyPath
|
|
* ----------------
|
|
*/
|
|
static Path *
|
|
_copyPath(Path *from)
|
|
{
|
|
Path *newnode = makeNode(Path);
|
|
|
|
CopyPathFields(from, newnode);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyIndexPath
|
|
* ----------------
|
|
*/
|
|
static IndexPath *
|
|
_copyIndexPath(IndexPath *from)
|
|
{
|
|
IndexPath *newnode = makeNode(IndexPath);
|
|
|
|
/* ----------------
|
|
* copy the node superclass fields
|
|
* ----------------
|
|
*/
|
|
CopyPathFields((Path *) from, (Path *) newnode);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->indexid = listCopy(from->indexid);
|
|
Node_Copy(from, newnode, indexqual);
|
|
newnode->joinrelids = listCopy(from->joinrelids);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyTidPath
|
|
* ----------------
|
|
*/
|
|
static TidPath *
|
|
_copyTidPath(TidPath *from)
|
|
{
|
|
TidPath *newnode = makeNode(TidPath);
|
|
|
|
/* ----------------
|
|
* copy the node superclass fields
|
|
* ----------------
|
|
*/
|
|
CopyPathFields((Path *) from, (Path *) newnode);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
Node_Copy(from, newnode, tideval);
|
|
newnode->unjoined_relids = listCopy(from->unjoined_relids);
|
|
|
|
return newnode;
|
|
}
|
|
/* ----------------
|
|
* CopyJoinPathFields
|
|
*
|
|
* This function copies the fields of the JoinPath node. It is used by
|
|
* all the copy functions for classes which inherit from JoinPath.
|
|
* ----------------
|
|
*/
|
|
static void
|
|
CopyJoinPathFields(JoinPath *from, JoinPath *newnode)
|
|
{
|
|
Node_Copy(from, newnode, outerjoinpath);
|
|
Node_Copy(from, newnode, innerjoinpath);
|
|
Node_Copy(from, newnode, joinrestrictinfo);
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyNestPath
|
|
* ----------------
|
|
*/
|
|
static NestPath *
|
|
_copyNestPath(NestPath *from)
|
|
{
|
|
NestPath *newnode = makeNode(NestPath);
|
|
|
|
/* ----------------
|
|
* copy the node superclass fields
|
|
* ----------------
|
|
*/
|
|
CopyPathFields((Path *) from, (Path *) newnode);
|
|
CopyJoinPathFields((JoinPath *) from, (JoinPath *) newnode);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyMergePath
|
|
* ----------------
|
|
*/
|
|
static MergePath *
|
|
_copyMergePath(MergePath *from)
|
|
{
|
|
MergePath *newnode = makeNode(MergePath);
|
|
|
|
/* ----------------
|
|
* copy the node superclass fields
|
|
* ----------------
|
|
*/
|
|
CopyPathFields((Path *) from, (Path *) newnode);
|
|
CopyJoinPathFields((JoinPath *) from, (JoinPath *) newnode);
|
|
|
|
/* ----------------
|
|
* copy the remainder of the node
|
|
* ----------------
|
|
*/
|
|
Node_Copy(from, newnode, path_mergeclauses);
|
|
Node_Copy(from, newnode, outersortkeys);
|
|
Node_Copy(from, newnode, innersortkeys);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyHashPath
|
|
* ----------------
|
|
*/
|
|
static HashPath *
|
|
_copyHashPath(HashPath *from)
|
|
{
|
|
HashPath *newnode = makeNode(HashPath);
|
|
|
|
/* ----------------
|
|
* copy the node superclass fields
|
|
* ----------------
|
|
*/
|
|
CopyPathFields((Path *) from, (Path *) newnode);
|
|
CopyJoinPathFields((JoinPath *) from, (JoinPath *) newnode);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
Node_Copy(from, newnode, path_hashclauses);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyPathKeyItem
|
|
* ----------------
|
|
*/
|
|
static PathKeyItem *
|
|
_copyPathKeyItem(PathKeyItem *from)
|
|
{
|
|
PathKeyItem *newnode = makeNode(PathKeyItem);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
Node_Copy(from, newnode, key);
|
|
newnode->sortop = from->sortop;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyRestrictInfo
|
|
* ----------------
|
|
*/
|
|
static RestrictInfo *
|
|
_copyRestrictInfo(RestrictInfo *from)
|
|
{
|
|
RestrictInfo *newnode = makeNode(RestrictInfo);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
Node_Copy(from, newnode, clause);
|
|
Node_Copy(from, newnode, subclauseindices);
|
|
newnode->mergejoinoperator = from->mergejoinoperator;
|
|
newnode->left_sortop = from->left_sortop;
|
|
newnode->right_sortop = from->right_sortop;
|
|
newnode->hashjoinoperator = from->hashjoinoperator;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* _copyJoinInfo
|
|
* ----------------
|
|
*/
|
|
static JoinInfo *
|
|
_copyJoinInfo(JoinInfo *from)
|
|
{
|
|
JoinInfo *newnode = makeNode(JoinInfo);
|
|
|
|
/* ----------------
|
|
* copy remainder of node
|
|
* ----------------
|
|
*/
|
|
newnode->unjoined_relids = listCopy(from->unjoined_relids);
|
|
Node_Copy(from, newnode, jinfo_restrictinfo);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static Iter *
|
|
_copyIter(Iter *from)
|
|
{
|
|
Iter *newnode = makeNode(Iter);
|
|
|
|
Node_Copy(from, newnode, iterexpr);
|
|
newnode->itertype = from->itertype;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static Stream *
|
|
_copyStream(Stream *from)
|
|
{
|
|
Stream *newnode = makeNode(Stream);
|
|
|
|
newnode->pathptr = from->pathptr;
|
|
newnode->cinfo = from->cinfo;
|
|
newnode->clausetype = from->clausetype;
|
|
|
|
newnode->upstream = (StreamPtr) NULL; /* only copy nodes
|
|
* downwards! */
|
|
Node_Copy(from, newnode, downstream);
|
|
if (newnode->downstream)
|
|
((Stream *) newnode->downstream)->upstream = (Stream *) newnode;
|
|
|
|
newnode->groupup = from->groupup;
|
|
newnode->groupcost = from->groupcost;
|
|
newnode->groupsel = from->groupsel;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
/*
|
|
* parsenodes.h routines have no copy functions
|
|
*/
|
|
|
|
static TargetEntry *
|
|
_copyTargetEntry(TargetEntry *from)
|
|
{
|
|
TargetEntry *newnode = makeNode(TargetEntry);
|
|
|
|
Node_Copy(from, newnode, resdom);
|
|
Node_Copy(from, newnode, fjoin);
|
|
Node_Copy(from, newnode, expr);
|
|
return newnode;
|
|
}
|
|
|
|
static RangeTblEntry *
|
|
_copyRangeTblEntry(RangeTblEntry *from)
|
|
{
|
|
RangeTblEntry *newnode = makeNode(RangeTblEntry);
|
|
|
|
if (from->relname)
|
|
newnode->relname = pstrdup(from->relname);
|
|
if (from->ref)
|
|
Node_Copy(from, newnode, ref);
|
|
newnode->relid = from->relid;
|
|
newnode->inh = from->inh;
|
|
newnode->inFromCl = from->inFromCl;
|
|
newnode->inJoinSet = from->inJoinSet;
|
|
newnode->skipAcl = from->skipAcl;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static RowMark *
|
|
_copyRowMark(RowMark *from)
|
|
{
|
|
RowMark *newnode = makeNode(RowMark);
|
|
|
|
newnode->rti = from->rti;
|
|
newnode->info = from->info;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static SortClause *
|
|
_copySortClause(SortClause *from)
|
|
{
|
|
SortClause *newnode = makeNode(SortClause);
|
|
|
|
newnode->tleSortGroupRef = from->tleSortGroupRef;
|
|
newnode->sortop = from->sortop;
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static A_Const *
|
|
_copyAConst(A_Const *from)
|
|
{
|
|
A_Const *newnode = makeNode(A_Const);
|
|
|
|
newnode->val = *((Value *) (copyObject(&(from->val))));
|
|
Node_Copy(from, newnode, typename);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static TypeName *
|
|
_copyTypeName(TypeName *from)
|
|
{
|
|
TypeName *newnode = makeNode(TypeName);
|
|
|
|
if (from->name)
|
|
newnode->name = pstrdup(from->name);
|
|
newnode->timezone = from->timezone;
|
|
newnode->setof = from->setof;
|
|
newnode->typmod = from->typmod;
|
|
Node_Copy(from, newnode, arrayBounds);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static TypeCast *
|
|
_copyTypeCast(TypeCast *from)
|
|
{
|
|
TypeCast *newnode = makeNode(TypeCast);
|
|
|
|
Node_Copy(from, newnode, arg);
|
|
Node_Copy(from, newnode, typename);
|
|
|
|
return newnode;
|
|
}
|
|
|
|
static Query *
|
|
_copyQuery(Query *from)
|
|
{
|
|
Query *newnode = makeNode(Query);
|
|
|
|
newnode->commandType = from->commandType;
|
|
if (from->utilityStmt && nodeTag(from->utilityStmt) == T_NotifyStmt)
|
|
{
|
|
NotifyStmt *from_notify = (NotifyStmt *) from->utilityStmt;
|
|
NotifyStmt *n = makeNode(NotifyStmt);
|
|
|
|
n->relname = pstrdup(from_notify->relname);
|
|
newnode->utilityStmt = (Node *) n;
|
|
}
|
|
newnode->resultRelation = from->resultRelation;
|
|
if (from->into)
|
|
newnode->into = pstrdup(from->into);
|
|
newnode->isPortal = from->isPortal;
|
|
newnode->isBinary = from->isBinary;
|
|
newnode->isTemp = from->isTemp;
|
|
newnode->unionall = from->unionall;
|
|
newnode->hasAggs = from->hasAggs;
|
|
newnode->hasSubLinks = from->hasSubLinks;
|
|
|
|
Node_Copy(from, newnode, rtable);
|
|
Node_Copy(from, newnode, targetList);
|
|
Node_Copy(from, newnode, qual);
|
|
Node_Copy(from, newnode, rowMark);
|
|
|
|
Node_Copy(from, newnode, distinctClause);
|
|
Node_Copy(from, newnode, sortClause);
|
|
Node_Copy(from, newnode, groupClause);
|
|
Node_Copy(from, newnode, havingQual);
|
|
|
|
/* why is intersectClause missing? */
|
|
Node_Copy(from, newnode, unionClause);
|
|
|
|
Node_Copy(from, newnode, limitOffset);
|
|
Node_Copy(from, newnode, limitCount);
|
|
|
|
/* we do not copy the planner internal fields: base_rel_list,
|
|
* join_rel_list, query_pathkeys. Not entirely clear if this is right?
|
|
*/
|
|
|
|
return newnode;
|
|
}
|
|
|
|
|
|
/*
|
|
* mnodes.h routines have no copy functions
|
|
*/
|
|
|
|
/* ****************************************************************
|
|
* pg_list.h copy functions
|
|
* ****************************************************************
|
|
*/
|
|
|
|
static Value *
|
|
_copyValue(Value *from)
|
|
{
|
|
Value *newnode = makeNode(Value);
|
|
|
|
newnode->type = from->type;
|
|
switch (from->type)
|
|
{
|
|
case T_String:
|
|
newnode->val.str = pstrdup(from->val.str);
|
|
break;
|
|
case T_Integer:
|
|
newnode->val.ival = from->val.ival;
|
|
break;
|
|
case T_Float:
|
|
newnode->val.dval = from->val.dval;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return newnode;
|
|
}
|
|
|
|
/* ----------------
|
|
* copyObject returns a copy of the node or list. If it is a list, it
|
|
* recursively copies its items.
|
|
* ----------------
|
|
*/
|
|
void *
|
|
copyObject(void *from)
|
|
{
|
|
void *retval;
|
|
|
|
if (from == NULL)
|
|
return NULL;
|
|
switch (nodeTag(from))
|
|
{
|
|
|
|
/*
|
|
* PLAN NODES
|
|
*/
|
|
case T_Plan:
|
|
retval = _copyPlan(from);
|
|
break;
|
|
case T_Result:
|
|
retval = _copyResult(from);
|
|
break;
|
|
case T_Append:
|
|
retval = _copyAppend(from);
|
|
break;
|
|
case T_Scan:
|
|
retval = _copyScan(from);
|
|
break;
|
|
case T_SeqScan:
|
|
retval = _copySeqScan(from);
|
|
break;
|
|
case T_IndexScan:
|
|
retval = _copyIndexScan(from);
|
|
break;
|
|
case T_TidScan:
|
|
retval = _copyTidScan(from);
|
|
break;
|
|
case T_Join:
|
|
retval = _copyJoin(from);
|
|
break;
|
|
case T_NestLoop:
|
|
retval = _copyNestLoop(from);
|
|
break;
|
|
case T_MergeJoin:
|
|
retval = _copyMergeJoin(from);
|
|
break;
|
|
case T_HashJoin:
|
|
retval = _copyHashJoin(from);
|
|
break;
|
|
case T_Noname:
|
|
retval = _copyNoname(from);
|
|
break;
|
|
case T_Material:
|
|
retval = _copyMaterial(from);
|
|
break;
|
|
case T_Sort:
|
|
retval = _copySort(from);
|
|
break;
|
|
case T_Group:
|
|
retval = _copyGroup(from);
|
|
break;
|
|
case T_Agg:
|
|
retval = _copyAgg(from);
|
|
break;
|
|
case T_GroupClause:
|
|
retval = _copyGroupClause(from);
|
|
break;
|
|
case T_Unique:
|
|
retval = _copyUnique(from);
|
|
break;
|
|
case T_Hash:
|
|
retval = _copyHash(from);
|
|
break;
|
|
case T_SubPlan:
|
|
retval = _copySubPlan(from);
|
|
break;
|
|
|
|
/*
|
|
* PRIMITIVE NODES
|
|
*/
|
|
case T_Resdom:
|
|
retval = _copyResdom(from);
|
|
break;
|
|
case T_Fjoin:
|
|
retval = _copyFjoin(from);
|
|
break;
|
|
case T_Expr:
|
|
retval = _copyExpr(from);
|
|
break;
|
|
case T_Var:
|
|
retval = _copyVar(from);
|
|
break;
|
|
case T_Attr:
|
|
retval = _copyAttr(from);
|
|
break;
|
|
case T_Oper:
|
|
retval = _copyOper(from);
|
|
break;
|
|
case T_Const:
|
|
retval = _copyConst(from);
|
|
break;
|
|
case T_Param:
|
|
retval = _copyParam(from);
|
|
break;
|
|
case T_Func:
|
|
retval = _copyFunc(from);
|
|
break;
|
|
case T_Array:
|
|
retval = _copyArray(from);
|
|
break;
|
|
case T_ArrayRef:
|
|
retval = _copyArrayRef(from);
|
|
break;
|
|
case T_Aggref:
|
|
retval = _copyAggref(from);
|
|
break;
|
|
case T_SubLink:
|
|
retval = _copySubLink(from);
|
|
break;
|
|
case T_CaseExpr:
|
|
retval = _copyCaseExpr(from);
|
|
break;
|
|
case T_CaseWhen:
|
|
retval = _copyCaseWhen(from);
|
|
break;
|
|
|
|
/*
|
|
* RELATION NODES
|
|
*/
|
|
case T_RelOptInfo:
|
|
retval = _copyRelOptInfo(from);
|
|
break;
|
|
case T_Path:
|
|
retval = _copyPath(from);
|
|
break;
|
|
case T_IndexPath:
|
|
retval = _copyIndexPath(from);
|
|
break;
|
|
case T_TidPath:
|
|
retval = _copyTidPath(from);
|
|
break;
|
|
case T_NestPath:
|
|
retval = _copyNestPath(from);
|
|
break;
|
|
case T_MergePath:
|
|
retval = _copyMergePath(from);
|
|
break;
|
|
case T_HashPath:
|
|
retval = _copyHashPath(from);
|
|
break;
|
|
case T_PathKeyItem:
|
|
retval = _copyPathKeyItem(from);
|
|
break;
|
|
case T_RestrictInfo:
|
|
retval = _copyRestrictInfo(from);
|
|
break;
|
|
case T_JoinInfo:
|
|
retval = _copyJoinInfo(from);
|
|
break;
|
|
case T_Iter:
|
|
retval = _copyIter(from);
|
|
break;
|
|
case T_Stream:
|
|
retval = _copyStream(from);
|
|
break;
|
|
case T_IndexOptInfo:
|
|
retval = _copyIndexOptInfo(from);
|
|
break;
|
|
|
|
/*
|
|
* PARSE NODES
|
|
*/
|
|
case T_Query:
|
|
retval = _copyQuery(from);
|
|
break;
|
|
case T_TargetEntry:
|
|
retval = _copyTargetEntry(from);
|
|
break;
|
|
case T_RangeTblEntry:
|
|
retval = _copyRangeTblEntry(from);
|
|
break;
|
|
case T_RowMark:
|
|
retval = _copyRowMark(from);
|
|
break;
|
|
case T_SortClause:
|
|
retval = _copySortClause(from);
|
|
break;
|
|
case T_A_Const:
|
|
retval = _copyAConst(from);
|
|
break;
|
|
case T_TypeName:
|
|
retval = _copyTypeName(from);
|
|
break;
|
|
case T_TypeCast:
|
|
retval = _copyTypeCast(from);
|
|
break;
|
|
|
|
/*
|
|
* VALUE NODES
|
|
*/
|
|
case T_Integer:
|
|
case T_String:
|
|
case T_Float:
|
|
retval = _copyValue(from);
|
|
break;
|
|
case T_List:
|
|
{
|
|
List *list = from,
|
|
*l,
|
|
*nl;
|
|
|
|
/* rather ugly coding for speed... */
|
|
/* Note the input list cannot be NIL if we got here. */
|
|
nl = lcons(copyObject(lfirst(list)), NIL);
|
|
retval = nl;
|
|
|
|
foreach(l, lnext(list))
|
|
{
|
|
lnext(nl) = lcons(copyObject(lfirst(l)), NIL);
|
|
nl = lnext(nl);
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
elog(ERROR, "copyObject: don't know how to copy %d", nodeTag(from));
|
|
retval = from;
|
|
break;
|
|
}
|
|
return retval;
|
|
}
|