AlterQuery  test (children 2)
 ExpressionList (children 1)
  AlterCommand ADD_INDEX (children 1)
   Index (children 2)
    Function tuple (children 1)
     ExpressionList (children 2)
      Identifier col1
      Identifier col2
    Function set (children 1)
     ExpressionList (children 1)
      Literal UInt64_100
 Identifier test
