CreateQuery a1 (children 3)
 Identifier a1
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration ANIMAL (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
