Invalid column name exception

Question

I am receiving an Invalid column name SQLException. I initially
thought it was a problem with the computed fields, but was after
making the usual changes to the model implementation the exception is
still occurring. I can run the SQL statement in SQLplus and get no
errors and the three results I'm expecting (grabbing the SQL statement
from the model's beforeExecute event). The mystifying part is that it
returns one of the three rows that I'm expecting. That is, the model
executes and the result set is partially filled. The model is Select
only. The computed fields are concatenated strings. After logging the
exception I call getNumRows() on the model and receive a 1 back. The
computed fields are returned in that one record. Any ideas about what
to try or where to look next?
Thanks,
paul

Answer 1

Kostas,
Thanks for your help. During migration a QueryFieldDescriptor was
created for a field that is only used in the where clause. I'm
assuming it then couldn't be mapped back to the ResultSet, and this
caused the Invalid Column Name exception. That is, I am selecting 5
fields, but had 6 QueryFieldDescriptors.
paul
--- In SunONE-JATO@y..., Kostas Morfis <kmorfis@i...> wrote:
Hi Paul,
It would appear you have a column name mismatch between what isdefines in
your modelImpl
and what is being returned by the JDBC driver.
From the SQL you sent, the Column Names would be something like:
'SURVEYGROUP_XREF',SURVEY_ID', CF_SURVEYANDGROUP', 'CF_SURVEYGROUP',
'RESULTS_VIEWER_ID'
Do all your column names definitions in your modelImpl match up tothese ?
>
eg public static final StringCOLUMN_WIS_SURVEYANDGROUP="CF_SURVEYANDGROUP";
>
Note: the qualified column vairables (QUALIFIED_COLUMN_XXXXXX) doNOT get
used for Select queries.
If it still unclear where the mismatch is occurring, you can addsome simple
debugging :
To tell you what you are trying to access add the the following in
ResultSetModelBase just before the
exception occurred:
System.out.println("UPDATE_MODEL: Attempting to Access Column Name:
"+fd.getColumnName());
Object value=resultSet.getObject(fd.getColumnName());
If still need more information,you can look at the column namesreturned by
the JDBC calls by doing something like:
ResultSetMetaData metaData = resultSet.getMetaData();
int columnCount = metaData.getColumnCount();
for(int i = 0; i < columnCount ; i++)
System.out.println("Colummn["+i+"]"+
metaData.getColumnName(i+1));
Hope that helps.
Kostas