double类型的等值查询，查不出来数据
#11400
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库里面数据如下：
使用sql： select power_total , door_status from root.room where power_total = 0.09; 查不出来数据
使用sql: select power_total , door_status from root.room where door_status = 1; 能查出来数据
power_total是double类型
door_status是int类型
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