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 UInt64
      DataType String
  ExpressionList (children 1)
   Index (children 2)
    Function mapKeys (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