Function findSenderMotion

src/backend/executor/execUtils.c:2338–2349

* Given the Plan and a Slice index, find the motion node that is the root of the slice's subtree. */

 * Given the Plan and a Slice index, find the motion node that is the root of the slice's subtree.
 */
Motion *findSenderMotion(PlannedStmt *plannedstmt, int sliceIndex)
{
	Assert(sliceIndex > -1);

	Plan *planTree = plannedstmt->planTree;
	MotionFinderContext ctx;
	ctx.base.node = (Node*)plannedstmt;
	ctx.motionId = sliceIndex;
	ctx.motion = NULL;
	MotionFinderWalker(planTree, &ctx);
	return ctx.motion;
}

typedef struct SubPlanFinderContext
{