freefuncs.c

关系型数据库 Postgresql 6.5.2

{
	/* ----------------
	 *	free remainder of node
	 * ----------------
	 */
	freeObject(node->refupperindexpr);
	freeObject(node->reflowerindexpr);
	freeObject(node->refexpr);
	freeObject(node->refassgnexpr);

	pfree(node);
}

/* ****************************************************************
 *						relation.h free functions
 * ****************************************************************
 */

/* ----------------
 *		_freeRelOptInfo
 * ----------------
 */
static void
_freeRelOptInfo(RelOptInfo *node)
{
	/* ----------------
	 *	free remainder of node
	 * ----------------
	 */
	freeList(node->relids);

	freeObject(node->targetlist);
	freeObject(node->pathlist);
	freeObject(node->cheapestpath);

	if (node->classlist)
		pfree(node->classlist);

	if (node->indexkeys)
		pfree(node->indexkeys);

	freeObject(node->indpred);

	if (node->ordering)
		pfree(node->ordering);

	freeObject(node->restrictinfo);
	freeObject(node->joininfo);
	freeObject(node->innerjoin);

	pfree(node);
}

/* ----------------
 *		FreePathFields
 *
 *		This function frees the fields of the Path node.  It is used by
 *		all the free functions for classes which inherit node Path.
 * ----------------
 */
static void
FreePathFields(Path *node)
{
	if (node->pathorder->ordtype == SORTOP_ORDER)
	{
		if (node->pathorder->ord.sortop)
			pfree(node->pathorder->ord.sortop);
	}
	else
		freeObject(node->pathorder->ord.merge);

	pfree(node->pathorder);		/* is it an object, but we don't have
								 * separate free for it */

	freeObject(node->pathkeys);

	freeList(node->joinid);
	freeObject(node->loc_restrictinfo);
}

/* ----------------
 *		_freePath
 * ----------------
 */
static void
_freePath(Path *node)
{
	FreePathFields(node);

	pfree(node);
}

/* ----------------
 *		_freeIndexPath
 * ----------------
 */
static void
_freeIndexPath(IndexPath *node)
{
	/* ----------------
	 *	free the node superclass fields
	 * ----------------
	 */
	FreePathFields((Path *) node);

	/* ----------------
	 *	free remainder of node
	 * ----------------
	 */
	freeList(node->indexid);
	freeObject(node->indexqual);

	if (node->indexkeys)
		pfree(node->indexkeys);

	pfree(node);
}

/* ----------------
 *		FreeNestPathFields
 *
 *		This function frees the fields of the NestPath node.  It is used by
 *		all the free functions for classes which inherit node NestPath.
 * ----------------
 */
static void
FreeNestPathFields(NestPath *node)
{
	freeObject(node->pathinfo);
	freeObject(node->outerjoinpath);
	freeObject(node->innerjoinpath);
}

/* ----------------
 *		_freeNestPath
 * ----------------
 */
static void
_freeNestPath(NestPath *node)
{
	/* ----------------
	 *	free the node superclass fields
	 * ----------------
	 */
	FreePathFields((Path *) node);
	FreeNestPathFields(node);

	pfree(node);
}

/* ----------------
 *		_freeMergePath
 * ----------------
 */
static void
_freeMergePath(MergePath *node)
{
	/* ----------------
	 *	free the node superclass fields
	 * ----------------
	 */
	FreePathFields((Path *) node);
	FreeNestPathFields((NestPath *) node);

	/* ----------------
	 *	free the remainder of the node
	 * ----------------
	 */
	freeObject(node->path_mergeclauses);
	freeObject(node->outersortkeys);
	freeObject(node->innersortkeys);

	pfree(node);
}

/* ----------------
 *		_freeHashPath
 * ----------------
 */
static void
_freeHashPath(HashPath *node)
{
	/* ----------------
	 *	free the node superclass fields
	 * ----------------
	 */
	FreePathFields((Path *) node);
	FreeNestPathFields((NestPath *) node);

	/* ----------------
	 *	free remainder of node
	 * ----------------
	 */
	freeObject(node->path_hashclauses);
	freeObject(node->outerhashkeys);
	freeObject(node->innerhashkeys);

	pfree(node);
}

/* ----------------
 *		_freeOrderKey
 * ----------------
 */
static void
_freeOrderKey(OrderKey *node)
{
	pfree(node);
}


/* ----------------
 *		_freeJoinKey
 * ----------------
 */
static void
_freeJoinKey(JoinKey *node)
{
	/* ----------------
	 *	free remainder of node
	 * ----------------
	 */
	freeObject(node->outer);
	freeObject(node->inner);

	pfree(node);
}

/* ----------------
 *		_freeMergeOrder
 * ----------------
 */
static void
_freeMergeOrder(MergeOrder *node)
{
	/* ----------------
	 *	free remainder of node
	 * ----------------
	 */
	pfree(node);
}

/* ----------------
 *		_freeRestrictInfo
 * ----------------
 */
static void
_freeRestrictInfo(RestrictInfo *node)
{
	/* ----------------
	 *	free remainder of node
	 * ----------------
	 */
	freeObject(node->clause);
	freeObject(node->indexids);
	freeObject(node->mergejoinorder);
	freeList(node->restrictinfojoinid);

	pfree(node);
}

/* ----------------
 *		FreeJoinMethodFields
 *
 *		This function frees the fields of the JoinMethod node.	It is used by
 *		all the free functions for classes which inherit node JoinMethod.
 * ----------------
 */
static void
FreeJoinMethodFields(JoinMethod *node)
{
	freeObject(node->jmkeys);
	freeObject(node->clauses);
	return;
}

/* ----------------
 *		_freeJoinMethod
 * ----------------
 */
static void
_freeJoinMethod(JoinMethod *node)
{
	FreeJoinMethodFields(node);

	pfree(node);
}

/* ----------------
 *		_freeHInfo
 * ----------------
 */
static void
_freeHashInfo(HashInfo *node)
{
	/* ----------------
	 *	free remainder of node
	 * ----------------
	 */
	FreeJoinMethodFields((JoinMethod *) node);

	pfree(node);
}

/* ----------------
 *		_freeMInfo
 * ----------------
 */
static void
_freeMergeInfo(MergeInfo *node)
{
	/* ----------------
	 *	free remainder of node
	 * ----------------
	 */
	FreeJoinMethodFields((JoinMethod *) node);
	freeObject(node->m_ordering);

	pfree(node);
}

/* ----------------
 *		_freeJoinInfo
 * ----------------
 */
static void
_freeJoinInfo(JoinInfo *node)
{
	/* ----------------
	 *	free remainder of node
	 * ----------------
	 */
	freeList(node->unjoined_relids);
	freeObject(node->jinfo_restrictinfo);

	pfree(node);
}

static void
_freeIter(Iter *node)
{
	freeObject(node->iterexpr);

	pfree(node);
}

static void
_freeStream(Stream *node)
{
	freeObject(node->downstream);

	pfree(node);
}

/*
 *	parsenodes.h routines have no free functions
 */

static void
_freeTargetEntry(TargetEntry *node)
{
	freeObject(node->resdom);
	freeObject(node->fjoin);
	freeObject(node->expr);

	pfree(node);
}

static void
_freeRangeTblEntry(RangeTblEntry *node)
{
	if (node->relname)
		pfree(node->relname);
	if (node->refname)
		pfree(node->refname);

	pfree(node);
}

static void
_freeRowMark(RowMark *node)
{
	pfree(node);
}

static void
_freeSortClause(SortClause *node)
{
	freeObject(node->resdom);

	pfree(node);
}

static void
_freeAConst(A_Const *node)
{
	freeObject(&(node->val));
	freeObject(node->typename);

	pfree(node);
}

static void
_freeTypeName(TypeName *node)
{
	if (node->name)
		pfree(node->name);
	freeObject(node->arrayBounds);

	pfree(node);
}

static void
_freeQuery(Query *node)
{
	if (node->utilityStmt && nodeTag(node->utilityStmt) == T_NotifyStmt)
	{
		NotifyStmt *node_notify = (NotifyStmt *) node->utilityStmt;

		pfree(node_notify->relname);
		pfree(node_notify);
	}
	if (node->into)
		pfree(node->into);
	if (node->uniqueFlag)
		pfree(node->uniqueFlag);

	freeObject(node->sortClause);
	freeObject(node->rtable);
	freeObject(node->targetList);
	freeObject(node->qual);
	freeObject(node->groupClause);
	freeObject(node->havingQual);
	freeObject(node->unionClause);
	freeObject(node->limitOffset);
	freeObject(node->limitCount);
	freeObject(node->rowMark);

	pfree(node);
}


/*
 *	mnodes.h routines have no free functions
 */

/* ****************************************************************
 *					pg_list.h free functions
 * ****************************************************************
 */

static void
_freeValue(Value *node)
{
	switch (node->type)
	{
			case T_String:
			pfree(node->val.str);
			break;
		default:
			break;
	}

	pfree(node);
}

/* ----------------
 *		freeObject free's the node or list. If it is a list, it
 *		recursively frees its items.
 * ----------------
 */
static void
freeObject(void *node)
{
	if (node == NULL)
		return;

	switch (nodeTag(node))
	{

			/*
			 * PLAN NODES
			 */
		case T_Plan:
			_freePlan(node);
			break;
		case T_Result:
			_freeResult(node);
			break;
		case T_Append:
			_freeAppend(node);
			break;
		case T_Scan:
			_freeScan(node);
			break;
		case T_SeqScan:
			_freeSeqScan(node);
			break;
		case T_IndexScan:
			_freeIndexScan(node);
			break;
		case T_Join:
			_freeJoin(node);
			break;
		case T_NestLoop:
			_freeNestLoop(node);
			break;
		case T_MergeJoin:
			_freeMergeJoin(node);
			break;
		case T_HashJoin:
			_freeHashJoin(node);
			break;
		case T_Noname:
			_freeNoname(node);
			break;
		case T_Material:
			_freeMaterial(node);
			break;
		case T_Sort:
			_freeSort(node);
			break;
		case T_Group:
			_freeGroup(node);
			break;
		case T_Agg:
			_freeAgg(node);
			break;
		case T_GroupClause:
			_freeGroupClause(node);
			break;
		case T_Unique:
			_freeUnique(node);
			break;
		case T_Hash:
			_freeHash(node);
			break;
		case T_SubPlan:
			_freeSubPlan(node);
			break;

			/*
			 * PRIMITIVE NODES
			 */
		case T_Resdom:
			_freeResdom(node);
			break;
		case T_Fjoin:
			_freeFjoin(node);
			break;
		case T_Expr:
			_freeExpr(node);
			break;
		case T_Var:
			_freeVar(node);
			break;
		case T_Oper:
			_freeOper(node);
			break;
		case T_Const:
			_freeConst(node);
			break;
		case T_Param:
			_freeParam(node);
			break;
		case T_Func:
			_freeFunc(node);
			break;
		case T_Array:
			_freeArray(node);
			break;
		case T_ArrayRef:
			_freeArrayRef(node);
			break;
		case T_Aggref:
			_freeAggref(node);
			break;
		case T_SubLink:
			_freeSubLink(node);
			break;
		case T_CaseExpr:
			_freeCaseExpr(node);
			break;
		case T_CaseWhen:
			_freeCaseWhen(node);
			break;

			/*
			 * RELATION NODES
			 */
		case T_RelOptInfo:
			_freeRelOptInfo(node);
			break;
		case T_Path:
			_freePath(node);
			break;
		case T_IndexPath:
			_freeIndexPath(node);
			break;
		case T_NestPath:
			_freeNestPath(node);
			break;
		case T_MergePath:
			_freeMergePath(node);
			break;
		case T_HashPath:
			_freeHashPath(node);
			break;
		case T_OrderKey:
			_freeOrderKey(node);
			break;
		case T_JoinKey:
			_freeJoinKey(node);
			break;
		case T_MergeOrder:
			_freeMergeOrder(node);
			break;
		case T_RestrictInfo:
			_freeRestrictInfo(node);
			break;
		case T_JoinMethod:
			_freeJoinMethod(node);
			break;
		case T_HashInfo:
			_freeHashInfo(node);
			break;
		case T_MergeInfo:
			_freeMergeInfo(node);
			break;
		case T_JoinInfo:
			_freeJoinInfo(node);
			break;
		case T_Iter:
			_freeIter(node);
			break;
		case T_Stream:
			_freeStream(node);
			break;

			/*
			 * PARSE NODES
			 */
		case T_Query:
			_freeQuery(node);
			break;
		case T_TargetEntry:
			_freeTargetEntry(node);
			break;
		case T_RangeTblEntry:
			_freeRangeTblEntry(node);
			break;
		case T_RowMark:
			_freeRowMark(node);
			break;
		case T_SortClause:
			_freeSortClause(node);
			break;
		case T_A_Const:
			_freeAConst(node);
			break;
		case T_TypeName:
			_freeTypeName(node);
			break;

			/*
			 * VALUE NODES
			 */
		case T_Integer:
		case T_String:
		case T_Float:
			_freeValue(node);
			break;
		case T_List:
			{
				List	   *list = node,
						   *l;

				foreach(l, list)
					freeObject(lfirst(l));
				freeList(list);
			}
			break;
		default:
			elog(ERROR, "freeObject: don't know how to free %d", nodeTag(node));
			break;
	}
}