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Hook for plugins to get control before PlannerGlobal is discarded

此版本暂无所选语言的定义，以下显示原始英文内容。

Interface type

planner_shutdown_hook_type

Header

src/include/optimizer/planner.h

Subsystem

Query planning

Initial value

NULL (no hook installed)

signature

typedef void (*planner_shutdown_hook_type) (PlannerGlobal *glob, Query *parse, const char *query_string, PlannedStmt *pstmt); extern PGDLLIMPORT planner_shutdown_hook_type planner_shutdown_hook;