Hello empire-db community,
in our application we've got a similar problem like the given example below.
We build a command object with different joins depending on different
expressions.
As you can see we have an inner join and a left outer join on the same
tables.
If we execute the statement we get the exception: column ambiguously
defined.
>From our point of view the framework is not able to set the table aliases on
it's own if required and
we do not have the possibility to set the alias manually.
Furthermore we see not the possibility to create a full outer join.
Example:
###################################################
public class PROJECTDB extends DBDatabase
{
public TTableA T_TABLEA;
public TTableB T_TABLEB;
public static class TTableA extends DBTable
{
// Spaltendefinitionen
public final DBTableColumn C_ID_A;
public final DBTableColumn C_VALUE_A;
public final DBTableColumn C_ID_C;
...
}
public static class TTableB extends DBTable
{
// Spaltendefinitionen
public final DBTableColumn C_ID_A;
public final DBTableColumn C_VALUE_B;
...
}
...
}
public class DO_SOME_THING
{
...
public method_B (DBCommand cmd)
{
cmd.join (PROJECTDB.TTableA.C_ID_A, PROJECTDB.TTableB.C_ID_A,
DBJoinType.INNER);
}
public method_C (DBCommand cmd)
{
cmd.join (PROJECTDB.TTableA.C_ID_A, PROJECTDB.TTableB.C_ID_A,
DBJoinType.LEFT);
}
..
public method_A
{
DBCommand cmd = ...;
if (expressionX()) {
method_C(cmd);
}
if (expressionY()) {
method_B(cmd);
}
...
readValuesFromDB(cmd);
...
}
###################################################
Do you have any clues?
Regards,
Pascal
