[Firebird-net-provider] EF handling

Discussion:

[Firebird-net-provider] EF handling - as string parameter

Nikolaus Kern

2017-05-02 07:39:16 UTC

Hello,

I am using following query to get all workitems for a specific organisation
unit:

ppaQuery = "SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE PRODUKTIONSSTATUS
NOT IN ('Abgeschlossen','Storno') ORDER BY PRODUKTIONSAUFTRAG_ID";

tmpPPA = this._ctx.LPP_PRODUKTIONSAUFTRAEGE.SqlQuery(ppaQuery).ToList();

This works fine, unless the parameter contains a -. In this case I receive
an exception "arithmetic exception, numeric overflow, or string
truncation\r\nstring right truncation"

In the case I concatenate the sql query it works fine:

ppaQuery = "SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE PRODUKTIONSSTATUS
NOT IN ('Abgeschlossen','Storno') AND AUSLASTUNG_GEHOERT_ZU = '" +
this.CurrentHalle + "' ORDER BY PRODUKTIONSAUFTRAG_ID";

tmpPPA = this._ctx.LPP_PRODUKTIONSAUFTRAEGE.SqlQuery(ppaQuery,
this.CurrentHalle).ToList();

Its EF 6.13 and Firebird .net Provider 4.10 (I am aware of the newer
versions but need to migration a big number of assemblies).

I would like to understand if there is a way to resolve this problem in a
more elegant way.

Thanks

Niko

Jiří Činčura

2017-05-02 07:43:15 UTC

Permalink

What parameter? I don't see any parameter in the query.

--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

Nikolaus Kern

2017-05-02 07:58:11 UTC

Permalink

Hi,

I just saw that the query and the execution do not match correct. This is the query with the parameter that creates an exception if the parameter is "Halle 6 - Schlosserei".

ppaQuery = "SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE PRODUKTIONSSTATUS NOT IN ('Abgeschlossen','Storno') AND AUSLASTUNG_GEHOERT_ZU = {0} ORDER BY PRODUKTIONSAUFTRAG_ID";
tmpPPA = this._ctx.LPP_PRODUKTIONSAUFTRAEGE.SqlQuery(ppaQuery, this.CurrentHalle).ToList();

Niko

-----Ursprüngliche Nachricht-----
Von: Jiří Činčura [mailto:***@cincura.net]
Gesendet: Dienstag, 2. Mai 2017 09:43
An: firebird-net-***@lists.sourceforge.net
Betreff: Re: [Firebird-net-provider] EF handling - as string parameter

What parameter? I don't see any parameter in the query.
--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

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Jiří Činčura

2017-05-02 08:01:58 UTC

Permalink

You should use @p0 instead of {0}
(https://msdn.microsoft.com/en-us/library/system.data.entity.dbset.sqlquery%28v=vs.113%29.aspx).
Optionally you can also specify the Size in FbParameter.
--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

Post by Nikolaus Kern
Hi,
I just saw that the query and the execution do not match correct. This is
the query with the parameter that creates an exception if the parameter
is "Halle 6 - Schlosserei".
ppaQuery = "SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE
PRODUKTIONSSTATUS NOT IN ('Abgeschlossen','Storno') AND
AUSLASTUNG_GEHOERT_ZU = {0} ORDER BY PRODUKTIONSAUFTRAG_ID";
tmpPPA = this._ctx.LPP_PRODUKTIONSAUFTRAEGE.SqlQuery(ppaQuery,
this.CurrentHalle).ToList();
Niko
-----Ursprüngliche Nachricht-----
Gesendet: Dienstag, 2. Mai 2017 09:43
Betreff: Re: [Firebird-net-provider] EF handling - as string parameter
What parameter? I don't see any parameter in the query.
--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/
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Nikolaus Kern

2017-05-02 09:55:37 UTC

Permalink

Hello Jiri,

thanks for the response.

I guess I am missing something here. The code below produces the same error as {0}.

ppaQuery = "SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE PRODUKTIONSSTATUS NOT IN ('Abgeschlossen','Storno') AND AUSLASTUNG_GEHOERT_ZU = @p0 ORDER BY PRODUKTIONSAUFTRAG_ID";
tmpPPA = this._ctx.LPP_PRODUKTIONSAUFTRAEGE.SqlQuery(ppaQuery, new object[]{this.CurrentHalle}).ToList();

If I copy the query to the SQL tool and execute the query it works fine (even when it does not return a record, which is also the case in other working queries).
SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE PRODUKTIONSSTATUS NOT IN ('Abgeschlossen','Storno') AND AUSLASTUNG_GEHOERT_ZU = 'Halle 6 - Schlosserei' ORDER BY PRODUKTIONSAUFTRAG_ID

Do you have an idea whats missing?

Thanks

Niko

-----Ursprüngliche Nachricht-----
Von: Jiří Činčura [mailto:***@cincura.net]
Gesendet: Dienstag, 2. Mai 2017 10:02
An: firebird-net-***@lists.sourceforge.net
Betreff: Re: [Firebird-net-provider] EF handling - as string parameter

You should use @p0 instead of {0}
(https://msdn.microsoft.com/en-us/library/system.data.entity.dbset.sqlquery%28v=vs.113%29.aspx).
Optionally you can also specify the Size in FbParameter.

--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

Post by Nikolaus Kern
Hi,
I just saw that the query and the execution do not match correct. This
is the query with the parameter that creates an exception if the
parameter is "Halle 6 - Schlosserei".
ppaQuery = "SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE
PRODUKTIONSSTATUS NOT IN ('Abgeschlossen','Storno') AND
AUSLASTUNG_GEHOERT_ZU = {0} ORDER BY PRODUKTIONSAUFTRAG_ID"; tmpPPA =
this._ctx.LPP_PRODUKTIONSAUFTRAEGE.SqlQuery(ppaQuery,
this.CurrentHalle).ToList();
Niko
-----Ursprüngliche Nachricht-----
Gesendet: Dienstag, 2. Mai 2017 09:43
Betreff: Re: [Firebird-net-provider] EF handling - as string parameter
What parameter? I don't see any parameter in the query.
--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/
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Jiří Činčura

2017-05-02 09:57:26 UTC

Permalink

What's the AUSLASTUNG_GEHOERT_ZU's datatype?
--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

Post by Nikolaus Kern
Hello Jiri,
thanks for the response.
I guess I am missing something here. The code below produces the same error as {0}.
ppaQuery = "SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE
PRODUKTIONSSTATUS NOT IN ('Abgeschlossen','Storno') AND
tmpPPA = this._ctx.LPP_PRODUKTIONSAUFTRAEGE.SqlQuery(ppaQuery, new
object[]{this.CurrentHalle}).ToList();
If I copy the query to the SQL tool and execute the query it works fine
(even when it does not return a record, which is also the case in other
working queries).
SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE PRODUKTIONSSTATUS NOT IN
('Abgeschlossen','Storno') AND AUSLASTUNG_GEHOERT_ZU = 'Halle 6 -
Schlosserei' ORDER BY PRODUKTIONSAUFTRAG_ID
Do you have an idea whats missing?
Thanks
Niko
-----Ursprüngliche Nachricht-----
Gesendet: Dienstag, 2. Mai 2017 10:02
Betreff: Re: [Firebird-net-provider] EF handling - as string parameter
(https://msdn.microsoft.com/en-us/library/system.data.entity.dbset.sqlquery%28v=vs.113%29.aspx).
Optionally you can also specify the Size in FbParameter.
--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

Post by Nikolaus Kern
Hi,
I just saw that the query and the execution do not match correct. This
is the query with the parameter that creates an exception if the
parameter is "Halle 6 - Schlosserei".
ppaQuery = "SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE
PRODUKTIONSSTATUS NOT IN ('Abgeschlossen','Storno') AND
AUSLASTUNG_GEHOERT_ZU = {0} ORDER BY PRODUKTIONSAUFTRAG_ID"; tmpPPA =
this._ctx.LPP_PRODUKTIONSAUFTRAEGE.SqlQuery(ppaQuery,
this.CurrentHalle).ToList();
Niko
-----Ursprüngliche Nachricht-----
Gesendet: Dienstag, 2. Mai 2017 09:43
Betreff: Re: [Firebird-net-provider] EF handling - as string parameter
What parameter? I don't see any parameter in the query.
--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/
----------------------------------------------------------------------
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Nikolaus Kern

2017-05-02 10:21:10 UTC

Permalink

Hello Jiri,

its my fault: AUSLASTUNG_GEHOERT_ZU is Varchar(20), the parameter "Halle 6 - Schlosserei" is 21 chars long.... After correcting the length to 30 it works fine. Interessting the slq console does not compain about the too long input for the query.

Thanks for answering to my posting that fast.

Can you please add 1 line to describe the difference between using {0} vs. @p0 ?

Thanks

Niko

-----Ursprüngliche Nachricht-----
Von: Jiří Činčura [mailto:***@cincura.net]
Gesendet: Dienstag, 2. Mai 2017 11:57
An: firebird-net-***@lists.sourceforge.net
Betreff: Re: [Firebird-net-provider] EF handling - as string parameter

What's the AUSLASTUNG_GEHOERT_ZU's datatype?

--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

Post by Nikolaus Kern
Hello Jiri,
thanks for the response.
I guess I am missing something here. The code below produces the same error as {0}.
ppaQuery = "SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE
PRODUKTIONSSTATUS NOT IN ('Abgeschlossen','Storno') AND
this._ctx.LPP_PRODUKTIONSAUFTRAEGE.SqlQuery(ppaQuery, new
object[]{this.CurrentHalle}).ToList();
If I copy the query to the SQL tool and execute the query it works
fine (even when it does not return a record, which is also the case in
other working queries).
SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE PRODUKTIONSSTATUS NOT IN
('Abgeschlossen','Storno') AND AUSLASTUNG_GEHOERT_ZU = 'Halle 6 -
Schlosserei' ORDER BY PRODUKTIONSAUFTRAG_ID
Do you have an idea whats missing?
Thanks
Niko
-----Ursprüngliche Nachricht-----
Gesendet: Dienstag, 2. Mai 2017 10:02
Betreff: Re: [Firebird-net-provider] EF handling - as string parameter
(https://msdn.microsoft.com/en-us/library/system.data.entity.dbset.sqlquery%28v=vs.113%29.aspx).
Optionally you can also specify the Size in FbParameter.
--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

Post by Nikolaus Kern
Hi,
I just saw that the query and the execution do not match correct.
This is the query with the parameter that creates an exception if
the parameter is "Halle 6 - Schlosserei".
ppaQuery = "SELECT * FROM LPP_PRODUKTIONSAUFTRAEGE WHERE
PRODUKTIONSSTATUS NOT IN ('Abgeschlossen','Storno') AND
AUSLASTUNG_GEHOERT_ZU = {0} ORDER BY PRODUKTIONSAUFTRAG_ID"; tmpPPA
= this._ctx.LPP_PRODUKTIONSAUFTRAEGE.SqlQuery(ppaQuery,
this.CurrentHalle).ToList();
Niko
-----Ursprüngliche Nachricht-----
Gesendet: Dienstag, 2. Mai 2017 09:43
Betreff: Re: [Firebird-net-provider] EF handling - as string
parameter
What parameter? I don't see any parameter in the query.
--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/
--------------------------------------------------------------------
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Jiří Činčura

2017-05-02 10:55:58 UTC

Permalink

Well, AFAIK only the @p0 is supported. Maybe the {0} works as well, but
I know only about the @p0 from documentation. Of course we can check EF6
sources, but I'm too lazy to do that. :D

--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

Daniel Rail

2017-05-02 11:58:41 UTC

Permalink

Hi,

Post by JiÅÃ ÄinÄura
sources, but I'm too lazy to do that. :D

Actually, it's not. I'm using the Firebird's default parameter syntax,
the question mark. And, I use "new object[] {paramValue1, paramValue2,
etc..}" to pass the parameters, and paramValueX are just simple
variables or object properties, don't have to be FbParameter. I don't
remember trying @p0, although I did try with actual names(i.e.:
@PDate), since it was also documented in the MSDN documentation, but I
was getting an invalid field error coming from Firebird.

But, as you mentioned, one might have to look at the EF6 sources to
find out the real behavior.

--
Best regards,
Daniel Rail
Senior Software Developer
ACCRA Solutions Inc. (www.accra.ca)
ACCRA Med Software Inc. (www.filopto.com)