explain_validate_options_hook

中文定义与说明

对 EXPLAIN 选项执行额外校验的钩子。

以下中文为本站依据所列 PostgreSQL 源码注释编译的说明。

接口声明

typedef void (*explain_validate_options_hook_type) (struct ExplainState *es, List *options, ParseState *pstate);
extern PGDLLIMPORT explain_validate_options_hook_type explain_validate_options_hook;

源码说明

插件专用的选项校验。

调用位置

• src/backend/commands/explain_state.c:206

核心调用上下文：src/backend/commands/explain_state.c:200–214

	/* if the summary was not set explicitly, set default value */
	es->summary = (summary_set) ? es->summary : es->analyze;

	/* plugin specific option validation */
	if (explain_validate_options_hook)
		(*explain_validate_options_hook) (es, options, pstate);
}

/*
 * Map the name of an EXPLAIN extension to an integer ID.
 *
 * Within the lifetime of a particular backend, the same name will be mapped
 * to the same ID every time. IDs are not stable across backends. Use the ID
 * that you get from this function to call GetExplainExtensionState and