In Dynamics AX, we have two way to filter the result set of records in joined query is using QueryFilter class and QueryBuildRange class.
So what’s difference between them? when do we use QueryFilter class? When do we use QueryBuildRange class?
Today, i will make a simple sample to show what is difference between them.
I have two table :
Table DuyDang_ParentTable which have 1 columns : ID.
Table DuyDang_ChildTable which have 3 columns : ID, ParentID, Qty.
and they have relation like this : DuyDang_ParentTable.ID = DuyDang_ChildTable.ParentID.
I have the Outer Join query:
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static void DuyDang_QueryFilter(Args _args)
{
Query query;
QueryBuildDataSource qbds, qbds1;
QueryRun queryRun;
DuyDang_ParentTable parentTable;
DuyDang_ChildTable childTable;
QueryFilter qFilter;
QueryBuildRange qRange;
struct structSet;
structSet = new struct
("str ParentID;"
+ "str ChildID;"
+ "real Quantity"
);
query = new Query();
qbds = query.addDataSource(tableNum(DuyDang_ParentTable));
qbds1 = qbds.addDataSource(tableNum(DuyDang_ChildTable));
qbds1.joinMode(JoinMode::OuterJoin); // Set join type.
qbds1.addLink(fieldNum(DuyDang_ParentTable, ID), fieldNum(DuyDang_ChildTable, ParentID));
qFilter = query.addQueryFilter(qbds1, 'Qty');
qFilter.value(queryValue(15));
//qRange = qbds1.addRange(fieldNum(DuyDang_ChildTable, Qty));
//qRange.value(queryValue(15));
queryRun = new QueryRun(query);
while (queryRun.next())
{
parentTable = queryRun.get(tableNum(DuyDang_ParentTable));
childTable = queryRun.get(tableNum(DuyDang_ChildTable));
structSet.value("ParentID", parentTable.ID);
structSet.value("ChildID", childTable.ID);
structSet.value("Quantity", childTable.Qty);
info(structSet.toString());
}
}
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and result info here:
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static void DuyDang_QueryFilter(Args _args)
{
Query query;
QueryBuildDataSource qbds, qbds1;
QueryRun queryRun;
DuyDang_ParentTable parentTable;
DuyDang_ChildTable childTable;
QueryFilter qFilter;
QueryBuildRange qRange;
struct structSet;
structSet = new struct
("str ParentID;"
+ "str ChildID;"
+ "real Quantity"
);
query = new Query();
qbds = query.addDataSource(tableNum(DuyDang_ParentTable));
qbds1 = qbds.addDataSource(tableNum(DuyDang_ChildTable));
qbds1.joinMode(JoinMode::OuterJoin); // Set join type.
qbds1.addLink(fieldNum(DuyDang_ParentTable, ID), fieldNum(DuyDang_ChildTable, ParentID));
//qFilter = query.addQueryFilter(qbds1, 'Qty');
//qFilter.value(queryValue(15));
qRange = qbds1.addRange(fieldNum(DuyDang_ChildTable, Qty));
qRange.value(queryValue(15));
queryRun = new QueryRun(query);
while (queryRun.next())
{
parentTable = queryRun.get(tableNum(DuyDang_ParentTable));
childTable = queryRun.get(tableNum(DuyDang_ChildTable));
structSet.value("ParentID", parentTable.ID);
structSet.value("ChildID", childTable.ID);
structSet.value("Quantity", childTable.Qty);
info(structSet.toString());
}
}
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and result info here:
now you can see the difference between them
- When you use
QueryBuidRange class, the restriction is in the ON clause of the OUTER JOIN in the ANSI SQL select statement that is generated by the AOS for the underlying database system.
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SELECT * FROM DuyDang_ParentTable(DuyDang_ParentTable_1)
OUTER JOIN * FROM DuyDang_ChildTable(DuyDang_ChildTable_1)
ON DuyDang_ParentTable.ID = DuyDang_ChildTable.ParentID
AND ((Qty = 15))
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- When you use
QueryFilter class, the restriction is in the WHERE clause of the OUTER JOIN in the ANSI SQL select statement that is generated by the AOS for the underlying database system.
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SELECT * FROM DuyDang_ParentTable(DuyDang_ParentTable_1)
OUTER JOIN * FROM DuyDang_ChildTable(DuyDang_ChildTable_1)
ON DuyDang_ParentTable.ID = DuyDang_ChildTable.ParentID
WHERE ((DuyDang_ChildTable(DuyDang_ChildTable_1).Qty = 15))
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Thank you for reading!
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