Creating WHERE clause for an outer join using DatabaseFilter

Question

Hi all,
I read a post on thie group about constructing the WHERE clause for a RowSet Controls
SQL Query using the DatabaseFilter and this is what it said:
****************************************************************************The
following example shows adding part of a WHERE clause in an action method of a
page flow:
DatabaseFilter.FilterTerm term = new DatabaseFilter.FilterTerm(); term.sColumnName
= "name"; term.op = DatabaseFilter.opContains; // there are ops for equals, less
than, etc... term.value = form.getPartialName();
// You can also add sort terms for an ORDER BY clause allNames = dbControl.getNames(new
DatabaseFilter(new DatabaseFilter.FilterTerm[] {term}, null));
I am trying to create a where clause which uses a join like this:
Select * from x,y where x.id=y.id (+)
ie. All values from x.id but only corrosponding ones from y.id.
Is there any way to build this outer join query using the DatabaseFilter class
or am i forced to use a String which is contruct in my page flow as the where
clause?like so:
* @jc:sql command-type="grid"
* rowset-name="RFPSRowSet"
* max-rows="1000"
* statement::
* SELECT RFPS.RFP_ID,RFPS.NAME AS RFP_NAME,RFPS.FFO_NUMBER,RFPS.RFP_TYPE,RFPS.CFDA_NUMBER,COMPETITIONS.NAME
AS COMP_NAME,COMPETITIONS.COMPETITION_ID FROM RFPS,COMPETITIONS WHERE {sql: whereClause
} {sql: filter.getOrderByClause ()}
public RowSet getAllRfps(java.lang.String whereClause,DatabaseFilter filter)
throws SQLException;
and in my pageFlow action, i do the following:
StringBuffer whereClause= new StringBuffer();
whereClause.append("RFPS.RFP_ID = COMPETITIONS.RFP_ID (+)");
if ((form.getRfpTitle() != null) &&
(!form.getRfpTitle().equalsIgnoreCase("")))
whereClause.append(" AND UPPER(RFPS.NAME) LIKE %"+form.getRfpTitle().toUpperCase());
if ((form.getCfdaNumber() != null) &&
(!form.getCfdaNumber().equalsIgnoreCase("")))
whereClause.append(" AND RFPS.CFDA_NUMBER ="+form.getCfdaNumber());
if ((form.getFfoNumber() != null) &&
(!form.getFfoNumber().equalsIgnoreCase("")))
whereClause.append(" AND RFPS.FFO_NUMBER ="+form.getFfoNumber());
sortFilterService = SortFilterService.getInstance(getRequest());
DatabaseFilter filter=sortFilterService.getDatabaseFilter(getGridName());
log.debug("***********"+whereClause.toString()+"***********");
allRows = searchRfaAndComp.getAllRfps(whereClause.toString(),filter);
Thanks in advance for your help,
Regards,
Vik.

Answer 1

Thanks for your reply. Just one more question....if we indeed are trying to use
a simple query and have a where clause like "select * from x where upper(x) like
{x}", how do we set the UPPER filter on the column using the database filter?
I see a IDENTIFIER.ISUPPER static field on that DatabaseFilter but am unsure how
to use it. Would appreciate any pointers .
Thanks again,
Vik
Eddie O'Neil <[email protected]> wrote:
Vik--
I believe that the approach that you describe below is the best one
for dealing with outer joins
with the DatabaseFilter.
Apologies for the limitation...
Eddie
vik wrote:
Hi all,
I read a post on thie group about constructing the WHERE clause fora RowSet Controls
SQL Query using the DatabaseFilter and this is what it said:
****************************************************************************The
following example shows adding part of a WHERE clause in an actionmethod of a
page flow:
DatabaseFilter.FilterTerm term = new DatabaseFilter.FilterTerm(); term.sColumnName
= "name"; term.op = DatabaseFilter.opContains; // there are ops forequals, less
than, etc... term.value = form.getPartialName();
// You can also add sort terms for an ORDER BY clause allNames = dbControl.getNames(new
DatabaseFilter(new DatabaseFilter.FilterTerm[] {term}, null));
I am trying to create a where clause which uses a join like this:
Select * from x,y where x.id=y.id (+)
ie. All values from x.id but only corrosponding ones from y.id.
Is there any way to build this outer join query using the DatabaseFilterclass
or am i forced to use a String which is contruct in my page flow asthe where
clause?like so:
* @jc:sql command-type="grid"
* rowset-name="RFPSRowSet"
* max-rows="1000"
* statement::
* SELECT RFPS.RFP_ID,RFPS.NAME AS RFP_NAME,RFPS.FFO_NUMBER,RFPS.RFP_TYPE,RFPS.CFDA_NUMBER,COMPETITIONS.NAME
AS COMP_NAME,COMPETITIONS.COMPETITION_ID FROM RFPS,COMPETITIONS WHERE{sql: whereClause
sql: filter.getOrderByClause ()}* ::
public RowSet getAllRfps(java.lang.String whereClause,DatabaseFilter
filter)
throws SQLException;
and in my pageFlow action, i do the following:
StringBuffer whereClause= new StringBuffer();
whereClause.append("RFPS.RFP_ID = COMPETITIONS.RFP_ID (+)");
if ((form.getRfpTitle() != null) &&
(!form.getRfpTitle().equalsIgnoreCase("")))
whereClause.append(" AND UPPER(RFPS.NAME) LIKE %"+form.getRfpTitle().toUpperCase());
if ((form.getCfdaNumber() != null) &&
(!form.getCfdaNumber().equalsIgnoreCase("")))
whereClause.append(" AND RFPS.CFDA_NUMBER ="+form.getCfdaNumber());
if ((form.getFfoNumber() != null) &&
(!form.getFfoNumber().equalsIgnoreCase("")))
whereClause.append(" AND RFPS.FFO_NUMBER ="+form.getFfoNumber());
sortFilterService = SortFilterService.getInstance(getRequest());
DatabaseFilter filter=sortFilterService.getDatabaseFilter(getGridName());
log.debug("***********"+whereClause.toString()+"***********");
allRows = searchRfaAndComp.getAllRfps(whereClause.toString(),filter);
Thanks in advance for your help,
Regards,
Vik.