CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration d (children 1)
    DataType Variant (children 1)
     ExpressionList (children 1)
      DataType UInt64
 Storage definition (children 3)
  Function MergeTree
  Function map (children 1)
   ExpressionList (children 2)
    Literal \'str\'
    Identifier d
  Function tuple (children 1)
   ExpressionList
