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Hook for plugins to replace standard_join_search()

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_search_hook_type

Header

src/include/optimizer/paths.h

Subsystem

Query planning

Initial value

NULL (no hook installed)

signature

typedef RelOptInfo *(*join_search_hook_type) (PlannerInfo *root, int levels_needed, List *initial_rels); extern PGDLLIMPORT join_search_hook_type join_search_hook;