在VBA中使用易失表进行TeraData查询

Question

I'm trying to automate a sequence of queries. One query, say Q1, is problematic as it creates a volatile table prior to the select statement. Within TeraData, Q1 runs fine but when passing Q1 to TeraData through VBA I get an error:

Only an ET or null statement is legal after a DDL Statement.

Q1 is of the form:

    create multiset volatile table volatileTable,
    no fallback,
    no before journal,
    no after journal,
    (
        a1,
        a2,
        a3,
        a4,
        a5
    ) as 
    (sel
        b1,
        b2,
        b3,
        min(b4) as a1,
        min(b5) as a2
    from
        db.table
    where
        b6 = 'condition'
    group by
        b1,
        b2,
        b3
    )
    with data
    on commit preserve rows;

    sel
        c1,
        c2,
        c3
    from 
        db.table
    group by
        1,
        2

    union

    sel
        d1,
        d2,
        d3
    from 
        (sel
            e.f1,
            e.f2,
            e.f3,
            e.a1,
            s.a1,
            e.a2,
            s.a2,
            e.a3,
            s.a3,
            e.a4,
            s.a4,
            e.a5,
            s.a5
        from 
            db.table) as e
            left outer join volatileTable as s
            on
                e.a1 = s.a1
                e.a2 = s.a2
                e.a3 = s.a3
                e.a4 >= s.a4
                e.a5 <= s.a5    
    group by
        1,
        2

    union

    sel
        g1,
        g2,
        g3
    from 
        db.table
    group by
        1,
        2

    union

    ...

The problem has got to be with creating a volatile table within the VBA ADODB.Command.Execute() statement. Any ideas on how to get around this?

Answer 1

You are connectected in BT/ET mode. After executing the Q1 query, execute "ET" command to end the transaction.

Or you could connect in Teradata default mode to do auto commit of queries.

Answer 2

You must send the Create and the Select in two separate requests.

In an ANSI session you must add a COMMIT; to the Create after on commit preserve rows;

To switch to from an ANSI to a Teradata session you need to change to Session Mode=Teradata;

If you're in a Teradata mode session, there's no need for BT/ET as every request is an implicit transaction.