Pro * C ++: Notes for batch reading

Source: Internet
Author: User
When reading data in the cursor in Pro * C in batches, note: when reading data in the cursor in batches at the last time, the data is retrieved to hostarray, and sqlca. sqlcode is set to 1403 (no_data_found ). If you determine sqlca. sqlcode immediately after fetch, the last data may not be retrieved.
The insurance method is to define the number of last read records for a variable record:
If (sqlca. sqlcode = 1403 & sqlca. sqlerrd [2] <= nlastcount)
{
Break;
}
Nlastcount = sqlca. sqlerrd [2];

A good syntax is: do {} while (sqlca. sqlcode! = 1403); to judge, the code is more concise!

Do
{
Exec SQL ftech curname into: hostarray;
Int ncount = sqlca. sqlerrd [2]-nlastcount;
//...
} While (sqlca. sqlcode! = 1403 );

 

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.