subselect.h

关系型数据库 Postgresql 6.5.2

/*-------------------------------------------------------------------------
 *
 * subselect.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef SUBSELECT_H
#define SUBSELECT_H

extern int	PlannerQueryLevel;	/* level of current query */
extern List *PlannerInitPlan;	/* init subplans for current query */
extern List *PlannerParamVar;	/* to get Var from Param->paramid */
extern int	PlannerPlanId;		/* to assign unique ID to subquery plans */

extern List *SS_finalize_plan(Plan *plan);
extern Node *SS_replace_correlation_vars(Node *expr);
extern Node *SS_process_sublinks(Node *expr);
extern List *SS_pull_subplan(Node *expr);

#endif	 /* SUBSELECT_H */