我需要从Sqlite数据库迁移到我的应用程序中的房间，但是在迁移之前，我有一些疑问，我已经搜索了许多站点，但是我对恢复房间数据库的性能却不满意。
我的表架构将通过API调用频繁更改，这可能在房间里吗？
我们需要实体以实体名称映射列名称，因为我的表架构经常更改，我如何创建实体？
是否可以将多列映射到实体中的单个字段属性，例如 表A具有三列COL_A，COL_B，COL_C
{
"_id" : ObjectId("5d07685b964f7400e4de0382"),
"name" : "Item1",
"status" : "BOOKED",
"products" : [
{
"status" : "Available",
"internalName" : "Product1",
"Name" : "ProductName1",
"benefits" : [
{
"someProp" : "BenefitProp1",
"internalName" : "BenefitName1",
"cost" : [
{
"amount" : "100",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "200",
"isUsed":1,
"currencyCode" : 2
}
]
},
{
"someProp" : "BenefitProp2",
"internalName" : "BenefitName2",
"cost" : [
{
"amount" : "300",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "400",
"isUsed":1,
"currencyCode" : 2
}
]
}
]
},
{
"status" : "Available",
"internalName" : "Product2",
"Name" : "ProductName2",
"benefits" : [
{
"someProp" : "BenefitProp3",
"internalName" : "BenefitName3",
"cost" : [
{
"amount" : "100",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "200",
"isUsed":1,
"currencyCode" : 2
}
]
},
{
"someProp" : "BenefitProp4",
"internalName" : "BenefitName4",
"cost" : [
{
"amount" : "300",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "400",
"isUsed":1,
"currencyCode" : 2
}
]
}
]
},
{
"status" : "BOOKED",
"internalName" : "Product3",
"Name" : "ProductName3",
"benefits" : [
{
"someProp" : "BenefitProp5",
"internalName" : "BenefitName5",
"cost" : [
{
"amount" : "100",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "200",
"isUsed":1,
"currencyCode" : 2
}
]
},
{
"someProp" : "BenefitProp6",
"internalName" : "BenefitName6",
"cost" : [
{
"amount" : "300",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "400",
"isUsed":1,
"currencyCode" : 2
}
]
}
]
}
],
"tripId" : 3
},
{
"_id" : ObjectId("5d07682c964f7400e4de0381"),
"name" : "Item2",
"status" : "Available",
"products" : [
{
"status" : "BOOKED",
"internalName" : "Product4",
"Name" : "ProdcutName4",
"benefits" : [
{
"someProp" : "BenefitProp7",
"internalName" : "BenefitName7",
"cost" : [
{
"amount" : "100",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "200",
"isUsed":1,
"currencyCode" : 2
}
]
},
{
"someProp" : "BenefitProp8",
"internalName" : "BenefitName8",
"cost" : [
{
"amount" : "300",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "400",
"isUsed":1,
"currencyCode" : 2
}
]
}
]
},
{
"status" : "BOOKED",
"internalName" : "Product5",
"Name" : "ProductName5",
"benefits" : [
{
"someProp" : "BenefitProp9",
"internalName" : "BenefitName9",
"cost" : [
{
"amount" : "100",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "200",
"isUsed":1,
"currencyCode" : 2
}
]
},
{
"someProp" : "BenefitProp10",
"internalName" : "BenefitName10",
"cost" : [
{
"amount" : "300",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "400",
"isUsed":1,
"currencyCode" : 2
}
]
}
]
},
{
"status" : "Available",
"internalName" : "Product6",
"Name" : "ProductName6",
"benefits" : [
{
"someProp" : "BenefitProp11",
"internalName" : "BenefitName11",
"cost" : [
{
"amount" : "100",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "200",
"isUsed":1,
"currencyCode" : 2
}
]
},
{
"someProp" : "BenefitProp12",
"internalName" : "BenefitName12",
"cost" : [
{
"amount" : "300",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "400",
"isUsed":1,
"currencyCode" : 2
}
]
}
]
}
],
"tripId" : 2
},
{
"_id" : ObjectId("5d0767d6964f7400e4de0380"),
"name" : "Item3",
"status" : "BOOKED",
"products" : [
{
"status" : "BOOKED",
"internalName" : "Product7",
"Name" : "ProductName7",
"benefits" : [
{
"someProp" : "BenefitProp13",
"internalName" : "BenefitName13",
"cost" : [
{
"amount" : "100",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "200",
"isUsed":1,
"currencyCode" : 2
}
]
},
{
"someProp" : "BenefitProp14",
"internalName" : "BenefitName14",
"cost" : [
{
"amount" : "300",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "400",
"isUsed":1,
"currencyCode" : 2
}
]
}
]
},
{
"status" : "Available",
"internalName" : "Product8",
"Name" : "ProductName8",
"benefits" : [
{
"someProp" : "BenefitProp15",
"internalName" : "BenefitName15",
"cost" : [
{
"amount" : "100",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "200",
"isUsed":1,
"currencyCode" : 2
}
]
},
{
"someProp" : "BenefitProp16",
"internalName" : "BenefitName16",
"cost" : [
{
"amount" : "300",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "400",
"isUsed":1,
"currencyCode" : 2
}
]
}
]
},
{
"status" : "Available",
"internalName" : "Product9",
"Name" : "ProductName9",
"benefits" : [
{
"someProp" : "BenefitProp17",
"internalName" : "BenefitName17",
"cost" : [
{
"amount" : "100",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "200",
"isUsed":1,
"currencyCode" : 2
}
]
},
{
"someProp" : "BenefitProp18",
"internalName" : "BenefitProp18",
"cost" : [
{
"amount" : "300",
"isUsed":0,
"currencyCode" : 1
},
{
"amount" : "400",
"isUsed":1,
"currencyCode" : 2
}
]
}
]
}
],
"tripId" : 1
}是否可以在房间中创建上述实体？ 任何人都可以消除以上疑问吗？