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ODBC Oracle with CString Probelm

Posted on 2004-04-05
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Last Modified: 2013-11-20
hello.
I am using oracle database ,and
mfc,odbc method to
execute my command.

I want to insert into mytable
,the field is LONG type data_type .
I want to insert a CString.
when the CString length <4000,
it's ok.
but when It's length come to >4000.
It won't work.
how can I resovle ,thx.

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Question by:oopilix
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5 Comments
 

Author Comment

by:oopilix
ID: 10763082
can anyone help me??:
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Expert Comment

by:alligatorsql
ID: 10765322
Hello,

we use OCI and when we want to save string that are greater than 4000 bytes, we use a piecewise operation. That
means, that Oracle will save the long string in 4000 bytes blocks. Is there a aquivalent operation in ODBC ?

Best regards
Manfred Peter
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Author Comment

by:oopilix
ID: 10771739
thx,
but I din't use OCI before,
and
how do you use it in OCI,
I can't imagine  I can't insert into one
field with different data;

as u see:
Insert into xxx(x) values(...
Insert into xxx(x) values(...

what will it become..
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Accepted Solution

by:
alligatorsql earned 25 total points
ID: 10773054
Hello,

That`s true.
OCI is a low level api and you use C functions to put the datas to the table.
Piecewise operation means that you call the oci function for inserting datas more that ones
For example:

CString sVeryLongString = "ABCD";
CString sVeryLongString1;="EDFG";

OCI_PREPARE_BUFFER(sVeryLongString);
OCI_PREPARE_BUFFER(sVeryLongString1);

OCI_EXECUTE ...

The question is, can you use piecewise operation with ODBC ?

Best regards
Manfred Peter

So, the question is,
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Author Comment

by:oopilix
ID: 10773153
oh,thank you
I will find the OdBC method ,and
try it.
 
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