diff --git a/legend-engine-xts-analytics/legend-engine-xts-analytics-lineage/legend-engine-xt-analytics-lineage-pure/src/main/resources/core_analytics_lineage/tests/lineageTests.pure b/legend-engine-xts-analytics/legend-engine-xts-analytics-lineage/legend-engine-xt-analytics-lineage-pure/src/main/resources/core_analytics_lineage/tests/lineageTests.pure
index c27d8139bbf..b6c38f5678c 100644
--- a/legend-engine-xts-analytics/legend-engine-xts-analytics-lineage/legend-engine-xt-analytics-lineage-pure/src/main/resources/core_analytics_lineage/tests/lineageTests.pure
+++ b/legend-engine-xts-analytics/legend-engine-xts-analytics-lineage/legend-engine-xt-analytics-lineage-pure/src/main/resources/core_analytics_lineage/tests/lineageTests.pure
@@ -125,3 +125,16 @@ function <<meta::pure::profiles::test.Test>> meta::analytics::lineage::tests::re
 
 
 }
+
+###Pure
+import meta::analytics::lineage::*;
+import meta::relational::tests::*;
+import meta::relational::tests::model::simple::*;
+function <<meta::pure::profiles::test.Test>> meta::analytics::lineage::tests::relational::testProjectWithIsolatedFilterMultiJoinTrees():Boolean[1]
+{
+   let fn =  { |Order.all()-> filter( p| $p.pnlContact->exists(l|$l.address.name == 'Main St' &&  $l.firm.legalName == 'Co' ))
+                                 ->project([ f|$f.quantity ], ['quantity'])};
+    let lineage = computeLineage($fn,simpleRelationalMapping, meta::external::store::relational::tests::testRuntime(), meta::relational::extension::relationalExtensions());
+    assertSameElements(['Lambda', 'db_db', 'db_dbInc', 'tb_dbIncdefaultaddressTable', 'tb_dbIncdefaultfirmTable', 'tb_dbIncdefaultpersonTable', 'tb_dbdefaultaccountTable', 'tb_dbdefaultorderPnlTable', 'tb_dbdefaultorderTable', 'tb_dbdefaultsalesPersonTable'],$lineage.databaseLineage.nodes.data.id);
+
+}
\ No newline at end of file
diff --git a/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-pure/src/main/resources/core_relational/relational/lineage/scanRelations/scanRelations.pure b/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-pure/src/main/resources/core_relational/relational/lineage/scanRelations/scanRelations.pure
index 41be682e587..105d83cb5fe 100644
--- a/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-pure/src/main/resources/core_relational/relational/lineage/scanRelations/scanRelations.pure
+++ b/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-pure/src/main/resources/core_relational/relational/lineage/scanRelations/scanRelations.pure
@@ -725,12 +725,18 @@ function <<access.private>> meta::pure::lineage::scanRelations::extractSourceCol
    if($reqTableAliasColumn->isEmpty() || $select.data->isEmpty(),
       |[],
       |let rootTree        = $select.data->toOne();
-       let childTrees      = $rootTree->children()->map(child | $child->extractLine());
+       let childTrees      = $rootTree->children()->map(child | $child->extractJoinChildren());
        let sourceOperation = $rootTree->concatenate($childTrees)->filter(tree | $tree.alias.name == $reqTableAliasColumn.alias.name).alias->toOne();
        $reqTableAliasColumn->toOne()->extractSourceColumn($sourceOperation, $relationIdentifiers, $sourceTree);
    );
 }
 
+function  <<access.private>> meta::pure::lineage::scanRelations::extractJoinChildren(j:JoinTreeNode[1]):JoinTreeNode[*]
+{
+   $j->concatenate(if($j->children()->isEmpty(),|[],|$j->children()->map(c|$c->extractJoinChildren())));
+}
+
+
 function <<access.private>> meta::pure::lineage::scanRelations::extractSourceRelation(sourceOperation:RelationalOperationElement[1], relationIdentifiers:String[*]):NamedRelation[1]
 {
    $sourceOperation->match([