CreateQuery example_mt (children 3)
 Identifier example_mt
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType UInt32
   ColumnDeclaration data (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType UInt8
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Identifier id
  Set
