Function ExecutionPlan_Clone

src/execution_plan/execution_plan_clone.c:71–81

This function clones the input ExecutionPlan by recursively visiting its tree of ops. * When an op is encountered that was constructed as part of a different ExecutionPlan segment, that segment * and its internal members (FilterTree, record mapping, query graphs, and AST segment) are also cloned. */

 * When an op is encountered that was constructed as part of a different ExecutionPlan segment, that segment
 * and its internal members (FilterTree, record mapping, query graphs, and AST segment) are also cloned. */
ExecutionPlan *ExecutionPlan_Clone(const ExecutionPlan *template) {
	ASSERT(template != NULL);
	// Store the original AST pointer.
	AST *master_ast = QueryCtx_GetAST();
	// Verify that the execution plan template is not prepared yet.
	ASSERT(template->prepared == false && "Execution plan cloning should be only on templates");
	ExecutionPlan *clone = _ExecutionPlan_Clone(template);
	// Restore the original AST pointer.
	QueryCtx_SetAST(master_ast);
	return clone;
}