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Hooks for plugins to get control in set_rel_pathlist()

此版本暂无所选语言的定义，以下显示原始英文内容。

Interface type

join_path_setup_hook_type

Header

src/include/optimizer/paths.h

Subsystem

Query planning

Initial value

NULL (no hook installed)

signature

typedef void (*join_path_setup_hook_type) (PlannerInfo *root, RelOptInfo *joinrel, RelOptInfo *outerrel, RelOptInfo *innerrel, JoinType jointype, JoinPathExtraData *extra); extern PGDLLIMPORT join_path_setup_hook_type join_path_setup_hook;