Explain EXPLAIN QUERY TREE (children 2)
 Set
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 5)
    ExpressionList (children 4)
     Identifier D_YEARMONTHNUM
     Identifier S_CITY
     Identifier P_BRAND
     Function sum (alias profit) (children 1)
      ExpressionList (children 1)
       Function minus (children 1)
        ExpressionList (children 2)
         Identifier LO_REVENUE
         Identifier LO_SUPPLYCOST
    TablesInSelectQuery (children 5)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier date
     TablesInSelectQueryElement (children 2)
      TableExpression (children 1)
       TableIdentifier customer
      TableJoin
     TablesInSelectQueryElement (children 2)
      TableExpression (children 1)
       TableIdentifier supplier
      TableJoin
     TablesInSelectQueryElement (children 2)
      TableExpression (children 1)
       TableIdentifier part
      TableJoin
     TablesInSelectQueryElement (children 2)
      TableExpression (children 1)
       TableIdentifier lineorder
      TableJoin
    Function and (children 1)
     ExpressionList (children 8)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier LO_CUSTKEY
        Identifier C_CUSTKEY
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier LO_SUPPKEY
        Identifier S_SUPPKEY
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier LO_PARTKEY
        Identifier P_PARTKEY
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier LO_ORDERDATE
        Identifier D_DATEKEY
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier S_NATION
        Literal \'UNITED KINGDOM\'
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier P_CATEGORY
        Literal \'MFGR#21\'
      Function and (children 1)
       ExpressionList (children 2)
        Function greaterOrEquals (children 1)
         ExpressionList (children 2)
          Identifier LO_QUANTITY
          Literal UInt64_34
        Function lessOrEquals (children 1)
         ExpressionList (children 2)
          Identifier LO_QUANTITY
          Literal UInt64_44
      Function and (children 1)
       ExpressionList (children 2)
        Function greaterOrEquals (children 1)
         ExpressionList (children 2)
          Identifier LO_ORDERDATE
          Function toDate (children 1)
           ExpressionList (children 1)
            Literal \'1996-01-01\'
        Function lessOrEquals (children 1)
         ExpressionList (children 2)
          Identifier LO_ORDERDATE
          Function toDate (children 1)
           ExpressionList (children 1)
            Literal \'1996-12-31\'
    ExpressionList (children 3)
     Identifier D_YEARMONTHNUM
     Identifier S_CITY
     Identifier P_BRAND
    ExpressionList (children 3)
     OrderByElement (children 1)
      Identifier D_YEARMONTHNUM
     OrderByElement (children 1)
      Identifier S_CITY
     OrderByElement (children 1)
      Identifier P_BRAND
