explain_get_index_name_hook

中文定义与说明

供插件在 explain_get_index_name() 中接管处理的钩子。

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 const char *(*explain_get_index_name_hook_type) (Oid indexId);
extern PGDLLIMPORT explain_get_index_name_hook_type explain_get_index_name_hook;

调用位置

• src/backend/commands/explain.c:4027

核心调用上下文：src/backend/commands/explain.c:4021–4035

static const char *
explain_get_index_name(Oid indexId)
{
	const char *result;

	if (explain_get_index_name_hook)
		result = (*explain_get_index_name_hook) (indexId);
	else
		result = NULL;
	if (result == NULL)
	{
		/* default behavior: look it up in the catalogs */
		result = get_rel_name(indexId);
		if (result == NULL)
			elog(ERROR, "cache lookup failed for index %u", indexId);