我有一个MySQL表或大约15万行,其中很大一部分在长blob字段中存储了blob(图像)。我正在尝试创建一个查询来选择行,并包含一个字段,该字段简单地指示了longblob (图像)是存在的。= '',1,0)‘,它将在不到一秒钟的时间内完成。我也试过以下几种方法,但它们都暂停了。IF(ISNULL(house_image),0,1) as has_imageSUBSTRING(house_image,0,1)AS
使用MySQL (MariaDB) (COALESCE(SELECT z.ID FROM bus_values z WHERE (z.BUS_NUM=35 AND z.WORKER_ID=2922882), 0))BUS_ID, YVAL, DATE_ENTERED
FROM data_points WHERE (WOR
00:25.652 2598-2712/com.mcrlogs.pp.test W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0x99497ce000:26.882 2598-2712/com.mcrlogs.pp.test W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0x99497ea000:31.568 2598-2712