CreateQuery tab (children 3)
 Identifier tab
 Columns definition (children 2)
  ExpressionList (children 2)
   ColumnDeclaration key (children 1)
    DataType UInt64
   ColumnDeclaration map (children 1)
    DataType Map (children 1)
     ExpressionList (children 2)
      DataType String
      DataType Float32
  ExpressionList (children 1)
   Index (children 2)
    Function mapValues (children 1)
     ExpressionList (children 1)
      Identifier map
    Function text (children 1)
     ExpressionList (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier tokenizer
        Literal \'splitByNonAlpha\'
 Storage definition (children 2)
  Function MergeTree
  Identifier key