CreateQuery without_nullable (children 3)
 Identifier without_nullable
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration timestamp (children 1)
    DataType UInt32
   ColumnDeclaration country (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
