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"RPG400-L" <rpg400-l-bounces@xxxxxxxxxxxx> wrote on 10/13/2017 03:33:12
PM:
1.) what do i need to do to avoid the -822?
2.) what are the correct sql steps to process the sql statement string
to
begin pulling out values from the fetched row? and from where?
You avoid -822 by providing addresses for the data areas where SQL
is to store the fetched data and indicators. However, I do hope you're
aware that the default SQLDA only provides space for up to 20 columns of
information (SQLVARs). If you need more than that then you need to create
your own descriptor data structure and use LIKEDS against the default
SQLDA and SQLVAR definitions. Otherwise, the steps are:
1. define enough data areas to provide storage for the number of columns
of data and indicators you will be fetching at one time
2. clear the descriptor data structure
3. set the number of SQLVAR areas in SQLN that you are expecting
4. issue a describe for your table/view/cursor
5. check SQLD to see the number of columns that were available to make
sure you're covered
6. loop through the descriptor data structure and, based on column data
type and length, provide addresses to your data areas from #1, above
7. fetch data using the descriptor data structure
At this point the fetched data and descriptors will be in your provided
data areas.
Sincerely,
Dave Clark
midrange.com
