ENGTAI-68310 : Adding logic and fixing order

document-store/src/integrationTest/java/org/hypertrace/core/documentstore/ArrayFiltersQueryIntegrationTest.java

@@ -296,6 +296,54 @@ void getSolarSystemsWithNoneOfThePlanetsHavingBothWaterAndOxygenTogether(
     JSONAssert.assertEquals(expected, actual, JSONCompareMode.LENIENT);
   }
 
+  /**
+   * Tests returning documents where environment IDs are a subset of the provided allowed
+   * environment IDs.
+   */
+  @ParameterizedTest
+  @ArgumentsSource(AllProvider.class)
+  void getDocumentsWithEnvironmentIdsSubsetOfGivenList(final String dataStoreName)
+      throws JSONException, IOException {
+    final String testCollectionName = "environment_scope_test";
+    final Datastore datastore = datastoreMap.get(dataStoreName);
+    final Map<Key, Document> testDocuments =
+        Utils.buildDocumentsFromResource("query/array_operators/environment_scope_test.json");
+    datastore.deleteCollection(testCollectionName);
+    datastore.createCollection(testCollectionName, null);
+    final Collection collection = datastore.getCollection(testCollectionName);
+    collection.bulkUpsert(testDocuments);
+
+    final java.util.List<String> environmentIds = java.util.List.of("env-1", "env-2", "env-3");
+
+    final Query query =
+        Query.builder()
+            .setFilter(
+                and(
+                    RelationalExpression.of(
+                        IdentifierExpression.of("scope.environmentScope.environmentIds"),
+                        RelationalOperator.EXISTS,
+                        ConstantExpression.of(true)),
+                    not(
+                        ArrayRelationalFilterExpression.builder()
+                            .operator(ANY)
+                            .filter(
+                                RelationalExpression.of(
+                                    IdentifierExpression.of(
+                                        "scope.environmentScope.environmentIds"),
+                                    RelationalOperator.NOT_IN,
+                                    ConstantExpression.ofStrings(environmentIds)))
+                            .build())))
+            .build();
+
+    final Iterator<Document> documents = collection.aggregate(query);
+    final String expected = readResource("environment_ids_subset.json");
+    final String actual = iteratorToJson(documents);
+
+    datastore.deleteCollection(testCollectionName);
+
+    JSONAssert.assertEquals(expected, actual, JSONCompareMode.LENIENT);
+  }
+
   private String readResource(final String fileName) {
     try {
       return new String(

document-store/src/integrationTest/resources/query/array_operators/environment_ids_subset.json

@@ -0,0 +1,18 @@
+[
+  {
+    "scope": {
+      "environmentScope": {
+        "environmentIds": ["env-1", "env-2"]
+      }
+    },
+    "name": "Document A"
+  },
+  {
+    "scope": {
+      "environmentScope": {
+        "environmentIds": ["env-1", "env-2", "env-3"]
+      }
+    },
+    "name": "Document B"
+  }
+]

document-store/src/integrationTest/resources/query/array_operators/environment_scope_test.json

@@ -0,0 +1,42 @@
+[
+  {
+    "_id": 1,
+    "name": "Document A",
+    "scope": {
+      "environmentScope": {
+        "environmentIds": ["env-1", "env-2"]
+      }
+    }
+  },
+  {
+    "_id": 2,
+    "name": "Document B", 
+    "scope": {
+      "environmentScope": {
+        "environmentIds": ["env-1", "env-2", "env-3"]
+      }
+    }
+  },
+  {
+    "_id": 3,
+    "name": "Document C",
+    "scope": {
+      "environmentScope": {
+        "environmentIds": ["env-1", "env-4"]
+      }
+    }
+  },
+  {
+    "_id": 4,
+    "name": "Document D",
+    "scope": {
+      "environmentScope": {
+        "environmentIds": ["env-5", "env-6"]
+      }
+    }
+  },
+  {
+    "_id": 5,
+    "name": "Document E"
+  }
+]

document-store/src/main/java/org/hypertrace/core/documentstore/mongo/query/parser/filter/MongoNotInExprRelationalFilterParser.java

@@ -0,0 +1,26 @@
+package org.hypertrace.core.documentstore.mongo.query.parser.filter;
+
+import java.util.Map;
+import lombok.AllArgsConstructor;
+import org.hypertrace.core.documentstore.expression.impl.RelationalExpression;
+import org.hypertrace.core.documentstore.mongo.query.parser.filter.MongoRelationalFilterParserFactory.MongoRelationalFilterContext;
+
+/**
+ * Note: MongoDB does not have a native "NOT IN" aggregation operator. This parser simulates "NOT
+ * IN" functionality by combining the $not and $in operators.
+ */
+@AllArgsConstructor
+public class MongoNotInExprRelationalFilterParser implements MongoRelationalFilterParser {
+  private static final String NOT_OP = "$not";
+  private static final String IN_OP = "$in";
+  private static final MongoStandardRelationalOperatorMapping mapping =
+      new MongoStandardRelationalOperatorMapping();
+
+  @Override
+  public Map<String, Object> parse(
+      final RelationalExpression expression, final MongoRelationalFilterContext context) {
+    final String parsedLhs = expression.getLhs().accept(context.lhsParser());
+    final Object parsedRhs = expression.getRhs().accept(context.rhsParser());
+    return Map.of(NOT_OP, Map.of(IN_OP, new Object[] {parsedLhs, parsedRhs}));
+  }
+}

document-store/src/main/java/org/hypertrace/core/documentstore/mongo/query/parser/filter/MongoRelationalFilterParserFactoryImpl.java

@@ -26,8 +26,22 @@ public MongoRelationalFilterParser parser(
         }
 
       case IN:
+        if (INSIDE_EXPR.equals(context.location())) {
+          return new MongoStandardExprRelationalFilterParser();
+        } else if (OUTSIDE_EXPR.equals(context.location())) {
+          return new MongoStandardNonExprRelationalFilterParser();
+        } else {
+          throw new UnsupportedOperationException("Unsupported location: " + context.location());
+        }
+
       case NOT_IN:
-        return new MongoStandardNonExprRelationalFilterParser();
+        if (INSIDE_EXPR.equals(context.location())) {
+          return new MongoNotInExprRelationalFilterParser();
+        } else if (OUTSIDE_EXPR.equals(context.location())) {
+          return new MongoStandardNonExprRelationalFilterParser();
+        } else {
+          throw new UnsupportedOperationException("Unsupported location: " + context.location());
+        }
 
       case CONTAINS:
         return new MongoContainsRelationalFilterParser();

document-store/src/main/java/org/hypertrace/core/documentstore/postgres/query/v1/vistors/PostgresFilterTypeExpressionVisitor.java

@@ -181,7 +181,7 @@ private String getFilterStringForAnyOperator(final ArrayRelationalFilterExpressi
             .accept(new PostgresIdentifierExpressionVisitor(postgresQueryParser));
 
     // If the field name is 'elements.inner', alias becomes 'elements_dot_inner'
-    final String alias = encodeAliasForNestedField(identifierName);
+    final String alias = encodeAliasForNestedField(identifierName).toLowerCase();
 
     // Any LHS field name (elements) is to be prefixed with current alias (elements_dot_inner)
     final PostgresWrappingFilterVisitorProvider visitorProvider =