Re: "SET FMTONLY ON select .." locks table

Actually not but as this query is just used to get metadata and as
lock last only the time to get this information I don't see the point
of locking here.

Frediano


2014-10-03 15:30 GMT+01:00 Yavuz Gökırmak <[email protected]>:
> Thanks Frediano,
>
> nolock may solve but this query ( or logic )
> is hardcode implemented in freetds,
> is it configurable?
>
> 2014-10-03 17:28 GMT+03:00 Frediano Ziglio <[email protected]>:
>
>> 2014-10-03 15:21 GMT+01:00 Yavuz Gökırmak <[email protected]>:
>> > Hi all,
>> >
>> > I am using freetds to do bulk load from linux to mssql,
>> > it is interesting that we get some problem during "SET FMTONLY ON.."
>> query,
>> > it is just getting table columns but somehow it gets the table lock and
>> > blocks other bulk load operations..
>> >
>> > do you have any idea,
>> > is it possible to disable this "set fmtonly" query and give table column
>> > names manually instead..
>> > regards.
>> >
>>
>> Hi,
>>   probably adding a (nolock) to the query like
>>
>> SET FMTONLY ON select * from clickstream.dbo.clicks_t(nolock) SET FMTONLY
>> OFF
>>
>> can help.
>>
>> > dblib.c:1369:dbsqlexec(0xaba400)
>> > dblib.c:6862:dbsqlsend(0xaba400)
>> > mem.c:615:tds_free_all_results()
>> > util.c:156:Changed query state from IDLE to QUERYING
>> > write.c:139:tds_put_string converting 73 bytes of "SET FMTONLY ON select
>> *
>> > from clickstream.dbo.clicks_t SET FMTONLY OFF"
>> > write.c:167:tds_put_string wrote 146 bytes
>> > util.c:156:Changed query state from QUERYING to PENDING
>> > net.c:743:Sending packet
>> > 0000 01 01 00 9a 00 00 01 00-53 00 45 00 54 00 20 00 |........ S.E.T. .|
>> > 0010 46 00 4d 00 54 00 4f 00-4e 00 4c 00 59 00 20 00 |F.M.T.O. N.L.Y. .|
>> > 0020 4f 00 4e 00 20 00 73 00-65 00 6c 00 65 00 63 00 |O.N. .s. e.l.e.c.|
>> > 0030 74 00 20 00 2a 00 20 00-66 00 72 00 6f 00 6d 00 |t. .*. . f.r.o.m.|
>> > 0040 20 00 65 00 76 00 61 00-6d 00 63 00 6c 00 69 00 | ..........
>> ..c.l.i.|
>> > 0050 63 00 6b 00 73 00 74 00-72 00 65 00 61 00 6d 00 |c.k.s.t. r.e.a.m.|
>> > 0060 2e 00 64 00 62 00 6f 00-2e 00 63 00 6c 00 69 00 |..d.b.o. ..c.l.i.|
>> > 0070 63 00 6b 00 73 00 5f 00-74 00 20 00 53 00 45 00 |c.k.s._. t. .S.E.|
>> > 0080 54 00 20 00 46 00 4d 00-54 00 4f 00 4e 00 4c 00 |T. .F.M. T.O.N.L.|
>> > 0090 59 00 20 00 4f 00 46 00-46 00                   |Y. .O.F. F.|
>> >
>> > dblib.c:4639:dbsqlok(0xaba400)
>> > dblib.c:4669:dbsqlok() not done, calling tds_process_tokens()
>> > token.c:540:tds_process_tokens(0xabaee0, 0x7ffff1375b30, 0x7ffff1375b34,
>> > 0x6914)
>> > util.c:156:Changed query state from PENDING to READING
>> >
>>
>> Regards,
>>   Frediano
>> _______________________________________________
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>>
>
>
>
> --
> Yavuz Gökırmak
> Co-Founder & Chief Data Architect
> Infoowl Software Solutions & Consultancy
>
> [email protected]
> +90 530 420 00 59
> www.infoowl.net
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