CreateQuery video_log (children 3)
 Identifier video_log
 Columns definition (children 1)
  ExpressionList (children 6)
   ColumnDeclaration datetime (children 1)
    DataType DateTime
   ColumnDeclaration user_id (children 1)
    DataType UInt64
   ColumnDeclaration device_id (children 1)
    DataType UInt64
   ColumnDeclaration domain (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration bytes (children 1)
    DataType UInt64
   ColumnDeclaration duration (children 1)
    DataType UInt64
 Storage definition (children 4)
  Function MergeTree
  Function toDate (children 1)
   ExpressionList (children 1)
    Identifier datetime
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier user_id
    Identifier device_id
  Set