greenplumn paramassign 源码
greenplumn paramassign 代码
文件路径：/src/include/optimizer/paramassign.h
/*-------------------------------------------------------------------------
*
* paramassign.h
* Functions for assigning PARAM_EXEC slots during planning.
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/optimizer/paramassign.h
*
*-------------------------------------------------------------------------
*/
#ifndef PARAMASSIGN_H
#define PARAMASSIGN_H
#include "nodes/pathnodes.h"
extern Param *replace_outer_var(PlannerInfo *root, Var *var);
extern Param *replace_outer_placeholdervar(PlannerInfo *root,
PlaceHolderVar *phv);
extern Param *replace_outer_agg(PlannerInfo *root, Aggref *agg);
extern Param *replace_outer_grouping(PlannerInfo *root, GroupingFunc *grp);
extern Param *replace_outer_group_id(PlannerInfo *root, GroupId *grp);
extern Param *replace_nestloop_param_var(PlannerInfo *root, Var *var);
extern Param *replace_nestloop_param_placeholdervar(PlannerInfo *root,
PlaceHolderVar *phv);
extern void process_subquery_nestloop_params(PlannerInfo *root,
List *subplan_params);
extern List *identify_current_nestloop_params(PlannerInfo *root,
Relids leftrelids);
extern Param *generate_new_exec_param(PlannerInfo *root, Oid paramtype,
int32 paramtypmod, Oid paramcollation);
extern int assign_special_exec_param(PlannerInfo *root);
#endif /* PARAMASSIGN_H */
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