# Supported Parquet column types


**Parquet data types:**
+  NULL 
+  BOOLEAN 
+  FLOAT 
+  DOUBLE 
+  STRING 
+  SIGNED INTEGER: UINT8, UINT16, UINT32, UINT64 
+  MAP: Only supports one-level. Does not support nested. 
+  LIST: Only supports one-level. Does not support nested. 

**Neptune -specific:**
+  A column type `Any` is supported in the user columns. An `Any` type is a type “syntactic sugar” for all of the other types we support. It is extremely useful if a user column has multiple types in it. The payload of an `Any` type value is a list of json strings as follows: `"{""value"": ""10"", ""type"": ""Int""};{""value"": ""1.0"", ""type"": ""Float""}"` , which has a `value` field and a `type` field in each individual json string. The column header of an `Any` type is `propertyname:Any`. The cardinality value of an `Any` column is `set`, meaning that the column can accept multiple values. 
  +  Neptune Analytics supports the following types in an `Any` type: `Bool` (or `Boolean`), `Byte`, `Short`, `Int`, `Long`, `UnsignedByte`, `UnsignedShort`, `UnsignedInt`, `UnsignedLong`, `Float`, `Double`, `Date`, `dateTime`, and `String`. 
  +  `Vector` type is not supported in `Any` type. 
  +  Nested `Any` type is not supported. For example, `"{""value"": "{""value"": ""10"", ""type"": ""Int""}", ""type"": ""Any""}"`.