在 R 中执行一个SQL，涉及到双层JSON，也就是第二层的JSON包含一个转义符，\。用R的RMySQL 执行的时候第二层的转义符号会被去掉怎么办。

如果我直接复制 statement 在SQL中可以执行成功。

以下是测试数据

UPDATE ANALYSIS SET POSITION_LIST = '[{\"date\":\"20150512\",\"listDatePosition\":\"[{\\\"code\\\":\\\"600000\\\",\\\"share\\\":274700,\\\"orderType\\\":1,\\\"price\\\":17.32,\\\"todayPosition\\\":0,\\\"totalPosition\\\":43857,\\\"tradeDate\\\":\\\"20150512104300\\\"},{\\\"code\\\":\\\"600652\\\",\\\"share\\\":3900,\\\"orderType\\\":1,\\\"price\\\":18.85,\\\"todayPosition\\\":0,\\\"totalPosition\\\":623,\\\"tradeDate\\\":\\\"20150512104300\\\"},{\\\"code\\\":\\\"600000\\\",\\\"share\\\":180700,\\\"orderType\\\":1,\\\"price\\\":17.32,\\\"todayPosition\\\":0,\\\"totalPosition\\\":43857,\\\"tradeDate\\\":\\\"20150512104300\\\"},{\\\"code\\\":\\\"600652\\\",\\\"share\\\":3900,\\\"orderType\\\":1,\\\"price\\\":18.85,\\\"todayPosition\\\":0,\\\"totalPosition\\\":623,\\\"tradeDate\\\":\\\"20150512104300\\\"}]\",\"startMoney\":8000000,\"counterFee\":0,\"endMoney\":7996494.47,\"deposits\":0,\"totalMarket\":767919.22},{\"date\":\"20150513\",\"listDatePosition\":\"[{\\\"code\\\":\\\"600000\\\",\\\"share\\\":277100,\\\"orderType\\\":1,\\\"price\\\":17.32,\\\"todayPosition\\\":0,\\\"totalPosition\\\":28857,\\\"tradeDate\\\":\\\"20150512104300\\\"},{\\\"code\\\":\\\"600652\\\",\\\"share\\\":3900,\\\"orderType\\\":1,\\\"price\\\":18.85,\\\"todayPosition\\\":0,\\\"totalPosition\\\":623,\\\"tradeDate\\\":\\\"20150512104300\\\"},{\\\"code\\\":\\\"600000\\\",\\\"share\\\":182300,\\\"orderType\\\":1,\\\"price\\\":17.32,\\\"todayPosition\\\":0,\\\"totalPosition\\\":28857,\\\"tradeDate\\\":\\\"20150512104300\\\"},{\\\"code\\\":\\\"600652\\\",\\\"share\\\":3900,\\\"orderType\\\":1,\\\"price\\\":18.85,\\\"todayPosition\\\":0,\\\"totalPosition\\\":623,\\\"tradeDate\\\":\\\"20150512104300\\\"}]\",\"startMoney\":7996494.47,\"counterFee\":0,\"endMoney\":7988530.21,\"deposits\":0,\"totalMarket\":504980.46},{\"date\":\"20150514\",\"listDatePosition\":\"[{\\\"code\\\":\\\"600652\\\",\\\"share\\\":365600,\\\"orderType\\\":1,\\\"price\\\":21.565,\\\"todayPosition\\\":0,\\\"totalPosition\\\":7824,\\\"tradeDate\\\":\\\"20150514103300\\\"}]\",\"startMoney\":7988530.21,\"counterFee\":0,\"endMoney\":7985375.903,\"deposits\":0,\"totalMarket\":171189.12}]',TRADE_DAY_COUNT = '3',DEAL_DETAIL = '[{\"volume\":14649,\"code\":\"600000\",\"price\":17.32,\"tradeType\":1,\"tradetime\":\"20150512104000\"},{\"volume\":9701,\"code\":\"600000\",\"price\":17.32,\"tradeType\":1,\"tradetime\":\"20150512104100\"},{\"volume\":6970,\"code\":\"600000\",\"price\":17.32,\"tradeType\":1,\"tradetime\":\"20150512104200\"},{\"volume\":12537,\"code\":\"600000\",\"price\":17.32,\"tradeType\":1,\"tradetime\":\"20150512104300\"},{\"volume\":623,\"code\":\"600652\",\"price\":18.85,\"tradeType\":1,\"tradetime\":\"20150512104300\"},{\"volume\":15000,\"code\":\"600000\",\"price\":17,\"tradeType\":-1,\"tradetime\":\"20150513103100\"},{\"volume\":19230,\"code\":\"600000\",\"price\":16.9,\"tradeType\":-1,\"tradetime\":\"20150514103100\"},{\"volume\":9627,\"code\":\"600000\",\"price\":16.9,\"tradeType\":-1,\"tradetime\":\"20150514103200\"},{\"volume\":7201,\"code\":\"600652\",\"price\":21.8,\"tradeType\":1,\"tradetime\":\"20150514103300\"}]',TYPE = 2 WHERE ID = UNHEX('8a2362225c3d480489e137dac92e8351')