CreateQuery neighbor_test (children 3)
 Identifier neighbor_test
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration rowNr (children 1)
    DataType UInt8
   ColumnDeclaration val_string (children 1)
    DataType String
   ColumnDeclaration val_low (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 3)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
  Identifier rowNr
