IDS Forum

Re: fragment NONE

Posted By: Fernando Nunes
Date: Friday, 17 January 2014, at 12:19 p.m.

In Response To: Re: fragment NONE (Paul Watson)

It does... And it's good. The bad part is that when DBDATE is wrong, it
doesn't complain... silently fails and gives no rows. If you try an INSERT
it complains. I think this is not very consistent and leads to confusion.
I'd prefer to see the same error as you get on an INSERT.
Regards.

On Fri, Jan 17, 2014 at 5:15 PM, Paul Watson <paul@oninit.com> wrote:

> Month is expecting a date but I suspect that there is an implicit cast in
> the
> mix - I would expect to work - probably month(char::date)
>
> Cheers
> Paul
>
> Paul Watson
> Oninit www.oninit.com
> +1 913 387 7529
>
> On Jan 17, 2014, at 10:20, "Fernando Nunes" <domusonline@gmail.com> wrote:
>
> > Yes... You have the wrong setting for DBDATE on the user who cannot see
> the
> > data... You need to set it to "Y4MD". Otherwise the engine will not be
> able
> > to parse the fragmentation expression. It should give an error in my
> > opinion... but Informix really tries hard to work even when it can't...
> >
> > If anyone find this is wrong behavior, please open a PMR. My first
> > impression would be that MONTH should not be allowed on non DATE
> columns...
> > but it accepts it.And then it breaks when the environment is wrong.
> > The problem can be easily reproduced.
> > Regards
> >
> > On Fri, Jan 17, 2014 at 3:54 PM, Fernando Nunes
> <domusonline@gmail.com>wrote:
> >
> >> Hmmmm.... weird... Do you have the same setting for DBDATE for both
> users?
> >> As someone else pointed out I find it odd the MONTH(CHAR(8)) works...
> >> Regards.
> >>
> >> On Fri, Jan 17, 2014 at 2:23 PM, CHUAN LU <luchuan@cn.ibm.com> wrote:
> >>
> >>> Hi,
> >>>
> >>> I fragmented a talbe using month function .
> >>> dbschema -d cbsbg -t aapf30 -ss
> >>> DBSCHEMA Schema Utility INFORMIX-SQL Version 11.50.FC7
> >>>
> >>> { TABLE "cbsbg".aapf30 row size = 220 number of columns = 21 index
> size =
> >>> 38 }
> >>> create table "cbsbg".aapf30
> >>> (
> >>>
> >>> aa30dpnoa char(11),
> >>>
> >>> aa30dpnok char(11),
> >>>
> >>> aa30acid integer,
> >>>
> >>> aa30date char(8),
> >>>
> >>> aa30seq integer,
> >>>
> >>> aa30brief char(3),
> >>>
> >>> aa30abst char(52),
> >>>
> >>> aa30crdcls char(4),
> >>>
> >>> aa30crdno char(20),
> >>>
> >>> aa30dc char(1),
> >>>
> >>> aa30amt decimal(16,2),
> >>>
> >>> aa30bal decimal(16,2),
> >>>
> >>> aa30acno char(32),
> >>>
> >>> aa30dpno char(11),
> >>>
> >>> aa30stan integer,
> >>>
> >>> aa30trcod char(4),
> >>>
> >>> aa30oprr char(10),
> >>>
> >>> aa30oprc char(10),
> >>>
> >>> aa30attr char(5),
> >>>
> >>> aa30enseq integer,
> >>>
> >>> aa30page integer
> >>> )
> >>> fragment by expression
> >>>
> >>> (MONTH (aa30date ) = 1 ) in datadbs01,
> >>>
> >>> (MONTH (aa30date ) = 2 ) in datadbs02,
> >>>
> >>> (MONTH (aa30date ) = 3 ) in datadbs03,
> >>>
> >>> (MONTH (aa30date ) = 4 ) in datadbs04,
> >>>
> >>> (MONTH (aa30date ) = 5 ) in datadbs05,
> >>>
> >>> (MONTH (aa30date ) = 6 ) in datadbs06,
> >>>
> >>> (MONTH (aa30date ) = 7 ) in datadbs07,
> >>>
> >>> (MONTH (aa30date ) = 8 ) in datadbs08,
> >>>
> >>> (MONTH (aa30date ) = 9 ) in datadbs09,
> >>>
> >>> (MONTH (aa30date ) = 10 ) in datadbs10,
> >>>
> >>> (MONTH (aa30date ) = 11 ) in datadbs11,
> >>>
> >>> (MONTH (aa30date ) = 12 ) in datadbs12
> >>> extent size 500000 next size 500000 lock mode row;
> >>>
> >>> revoke all on "cbsbg".aapf30 from "public" as "cbsbg";
> >>>
> >>> create unique index "cbsbg".aalf31 on "cbsbg".aapf30 (aa30acid,
> >>>
> >>> aa30seq) using btree in idxdbs;
> >>> create index "cbsbg".aalf32 on "cbsbg".aapf30 (aa30acid,aa30date,
> >>>
> >>> aa30page) using btree ;
> >>> Totally the table has about 150M rows.
> >>>
> >>> I have two users, one is cbsbg ,it's the development DBA,the other is
> >> query
> >>> user which use to execute the select statement. I execute the below SQL
> >>> with
> >>> both cbsbg and query user, cbsbg coult return the corrent result,but
> >> query
> >>> user show no rows returned.
> >>>
> >>> select * from aapf30 where aa30date='20131111'
> >>>
> >>> I capture the execute plain, and they are different .
> >>>
> >>> 1)quyer user:
> >>> QUERY: (OPTIMIZATION TIMESTAMP: 01-17-2014 20:56:49)
> >>> ------
> >>> select * from aapf30 where aa30date='20131111'
> >>>
> >>> Estimated Cost: 1186996
> >>> Estimated # of Rows Returned: 71947
> >>> 1) cbsbg.aapf30: INDEX PATH
> >>>
> >>> (1) Index Name: cbsbg.aalf32
> >>> Index Keys: aa30acid aa30date aa30page (Serial, fragments: NONE)
> >>> Index Self Join Keys (aa30acid )
> >>> Lower Index Filter: cbsbg.aapf30.aa30acid = cbsbg.aapf30.aa30acid AND
> >>> cbsbg.aapf30.aa30date = '20131111'
> >>>
> >>> Query statistics:
> >>> -----------------
> >>> Table map :
> >>> ----------------------------
> >>> Internal name Table name
> >>> ----------------------------
> >>> t1 aapf30
> >>> type table rows_prod est_rows rows_scan time est_cost
> >>> -------------------------------------------------------------------
> >>> scan t1 0 71947 0 00:00.00 1186996
> >>>
> >>> select month('20130221') from sysmaster:sysdual
> >>>
> >>> (constant)
> >>>
> >>> 0
> >>> it show ids doesn't scan any fragment
> >>> 2) cbsbg user:
> >>> select month('20130221') from sysmaster:sysdual
> >>>
> >>> (constant)
> >>>
> >>> 2
> >>> QUERY: (OPTIMIZATION TIMESTAMP: 01-17-2014 19:27:16)
> >>> ------
> >>> select * from aapf30 where aa30date='20131111'
> >>>
> >>> Estimated Cost: 3331663
> >>> Estimated # of Rows Returned: 71947
> >>> 1) cbsbg.aapf30: INDEX PATH
> >>>
> >>> (1) Index Name: cbsbg.aalf32
> >>> Index Keys: aa30acid aa30date aa30page (Serial, fragments: 10)
> >>> Fragments Scanned: (10) datadbs11
> >>> Index Self Join Keys (aa30acid )
> >>> Lower Index Filter: cbsbg.aapf30.aa30acid = cbsbg.aapf30.aa30acid AND
> >>> cbsbg.aapf30.aa30date = '20131111'
> >>>
> >>> Query statistics:
> >>> -----------------
> >>> Table map :
> >>> ----------------------------
> >>> Internal name Table name
> >>> ----------------------------
> >>> t1aapf30
> >>> type table rows_prod est_rows rows_scan timeest_cost
> >>> -------------------------------------------------------------------
> >>> scan t1 1871947 1800:00.03 3331663
> >>>
> >>> 3&#65289; grantor and grantee information in catalog tables:
> >>>
> >>> grantor cbsbg
> >>> grantee query
> >>> tabid 102
> >>> tabauth s--------
> >>>
> >>> 4) oncheck
> >>>
> >>> I use query user to run the "oncheck -pT cbsbg:aapf30", the ouput is
> >>> correct.
> >>>
> >>> Do anybody has any suggestion on the problem? thanks for your time .
> >
>
> *******************************************************************************
> >>> Forum Note: Use "Reply" to post a response in the discussion forum.
> >>
> >> --
> >> Fernando Nunes
> >> Portugal
> >>
> >> http://informix-technology.blogspot.com
> >> My email works... but I don't check it frequently...
> >>
> >> --047d7b3436d2b7591704f02c8f4e
> >
>
> *******************************************************************************
> >> Forum Note: Use "Reply" to post a response in the discussion forum.
> >
> > --
> > Fernando Nunes
> > Portugal
> >
> > http://informix-technology.blogspot.com
> > My email works... but I don't check it frequently...
> >
> > --089e0111d7327efa8b04f02cec02
> >
> >
> >
>
> *******************************************************************************
> > Forum Note: Use "Reply" to post a response in the discussion forum.
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--
Fernando Nunes
Portugal

http://informix-technology.blogspot.com
My email works... but I don't check it frequently...

--089e013a0bf66140cb04f02dbe12

Messages In This Thread

• fragment NONE
  CHUAN LU -- Friday, 17 January 2014, at 9:23 a.m.
  • Re: fragment NONE
    Art Kagel -- Friday, 17 January 2014, at 9:48 a.m.
  • Re: fragment NONE
    George_Palmer@aotx.uscourts.gov -- Friday, 17 January 2014, at 10:45 a.m.
  • Re: fragment NONE
    Fernando Nunes -- Friday, 17 January 2014, at 10:54 a.m.
    • Re: fragment NONE
      Fernando Nunes -- Friday, 17 January 2014, at 11:20 a.m.
      • Re: fragment NONE
        Paul Watson -- Friday, 17 January 2014, at 12:15 p.m.
        • Re: fragment NONE
          Fernando Nunes -- Friday, 17 January 2014, at 12:19 p.m.
          • Re: fragment NONE
            CHUAN LU -- Tuesday, 21 January 2014, at 8:01 p.m.

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