diff --git a/spec/ParseGraphQLServer.spec.js b/spec/ParseGraphQLServer.spec.js
index adf004932b..205de6263c 100644
--- a/spec/ParseGraphQLServer.spec.js
+++ b/spec/ParseGraphQLServer.spec.js
@@ -9516,6 +9516,130 @@ describe('ParseGraphQLServer', () => {
           }
         });
 
+        it('should support where argument on object field that contains false boolean value or 0 number value', async () => {
+          try {
+            const someObjectFieldValue1 = {
+              foo: { bar: true, baz: 100 },
+            };
+
+            const someObjectFieldValue2 = {
+              foo: { bar: false, baz: 0 },
+            };
+
+            const object1 = new Parse.Object('SomeClass');
+            await object1.save({
+              someObjectField: someObjectFieldValue1,
+            });
+            const object2 = new Parse.Object('SomeClass');
+            await object2.save({
+              someObjectField: someObjectFieldValue2,
+            });
+
+            const whereToObject1 = {
+              someObjectField: {
+                equalTo: { key: 'foo.bar', value: true },
+                notEqualTo: { key: 'foo.baz', value: 0 },
+              },
+            };
+            const whereToObject2 = {
+              someObjectField: {
+                notEqualTo: { key: 'foo.bar', value: true },
+                equalTo: { key: 'foo.baz', value: 0 },
+              },
+            };
+
+            const whereToAll = {
+              someObjectField: {
+                lessThan: { key: 'foo.baz', value: 101 },
+              },
+            };
+
+            const whereToNone = {
+              someObjectField: {
+                notEqualTo: { key: 'foo.bar', value: true },
+                equalTo: { key: 'foo.baz', value: 1 },
+              },
+            };
+
+            const queryResult = await apolloClient.query({
+              query: gql`
+                query GetSomeObject(
+                  $id1: ID!
+                  $id2: ID!
+                  $whereToObject1: SomeClassWhereInput
+                  $whereToObject2: SomeClassWhereInput
+                  $whereToAll: SomeClassWhereInput
+                  $whereToNone: SomeClassWhereInput
+                ) {
+                  obj1: someClass(id: $id1) {
+                    id
+                    someObjectField
+                  }
+                  obj2: someClass(id: $id2) {
+                    id
+                    someObjectField
+                  }
+                  onlyObj1: someClasses(where: $whereToObject1) {
+                    edges {
+                      node {
+                        id
+                        someObjectField
+                      }
+                    }
+                  }
+                  onlyObj2: someClasses(where: $whereToObject2) {
+                    edges {
+                      node {
+                        id
+                        someObjectField
+                      }
+                    }
+                  }
+                  all: someClasses(where: $whereToAll) {
+                    edges {
+                      node {
+                        id
+                        someObjectField
+                      }
+                    }
+                  }
+                  none: someClasses(where: $whereToNone) {
+                    edges {
+                      node {
+                        id
+                        someObjectField
+                      }
+                    }
+                  }
+                }
+              `,
+              variables: {
+                id1: object1.id,
+                id2: object2.id,
+                whereToObject1,
+                whereToObject2,
+                whereToAll,
+                whereToNone,
+              },
+            });
+
+            const { obj1, obj2, onlyObj1, onlyObj2, all, none } = queryResult.data;
+
+            expect(obj1.someObjectField).toEqual(someObjectFieldValue1);
+            expect(obj2.someObjectField).toEqual(someObjectFieldValue2);
+
+            // Checks class query results
+            expect(onlyObj1.edges.length).toEqual(1);
+            expect(onlyObj1.edges[0].node.someObjectField).toEqual(someObjectFieldValue1);
+            expect(onlyObj2.edges.length).toEqual(1);
+            expect(onlyObj2.edges[0].node.someObjectField).toEqual(someObjectFieldValue2);
+            expect(all.edges.length).toEqual(2);
+            expect(none.edges.length).toEqual(0);
+          } catch (e) {
+            handleError(e);
+          }
+        });
+
         it('should support object composed queries', async () => {
           try {
             const someObjectFieldValue1 = {
diff --git a/src/Adapters/Storage/Postgres/PostgresStorageAdapter.js b/src/Adapters/Storage/Postgres/PostgresStorageAdapter.js
index 764cfe2d78..eb668868c6 100644
--- a/src/Adapters/Storage/Postgres/PostgresStorageAdapter.js
+++ b/src/Adapters/Storage/Postgres/PostgresStorageAdapter.js
@@ -91,6 +91,22 @@ const toPostgresValue = value => {
   return value;
 };
 
+const toPostgresValueCastType = value => {
+  const postgresValue = toPostgresValue(value);
+  let castType;
+  switch (typeof postgresValue) {
+    case 'number':
+      castType = 'double precision';
+      break;
+    case 'boolean':
+      castType = 'boolean';
+      break;
+    default:
+      castType = undefined;
+  }
+  return castType;
+};
+
 const transformValue = value => {
   if (typeof value === 'object' && value.__type === 'Pointer') {
     return value.objectId;
@@ -369,9 +385,12 @@ const buildWhereClause = ({ schema, query, index, caseInsensitive }): WhereClaus
             );
           } else {
             if (fieldName.indexOf('.') >= 0) {
-              const constraintFieldName = transformDotField(fieldName);
+              const castType = toPostgresValueCastType(fieldValue.$ne);
+              const constraintFieldName = castType
+                ? `CAST ((${transformDotField(fieldName)}) AS ${castType})`
+                : transformDotField(fieldName);
               patterns.push(
-                `(${constraintFieldName} <> $${index} OR ${constraintFieldName} IS NULL)`
+                `(${constraintFieldName} <> $${index + 1} OR ${constraintFieldName} IS NULL)`
               );
             } else if (typeof fieldValue.$ne === 'object' && fieldValue.$ne.$relativeTime) {
               throw new Parse.Error(
@@ -401,8 +420,12 @@ const buildWhereClause = ({ schema, query, index, caseInsensitive }): WhereClaus
         index += 1;
       } else {
         if (fieldName.indexOf('.') >= 0) {
+          const castType = toPostgresValueCastType(fieldValue.$eq);
+          const constraintFieldName = castType
+            ? `CAST ((${transformDotField(fieldName)}) AS ${castType})`
+            : transformDotField(fieldName);
           values.push(fieldValue.$eq);
-          patterns.push(`${transformDotField(fieldName)} = $${index++}`);
+          patterns.push(`${constraintFieldName} = $${index++}`);
         } else if (typeof fieldValue.$eq === 'object' && fieldValue.$eq.$relativeTime) {
           throw new Parse.Error(
             Parse.Error.INVALID_JSON,
@@ -771,20 +794,11 @@ const buildWhereClause = ({ schema, query, index, caseInsensitive }): WhereClaus
     Object.keys(ParseToPosgresComparator).forEach(cmp => {
       if (fieldValue[cmp] || fieldValue[cmp] === 0) {
         const pgComparator = ParseToPosgresComparator[cmp];
-        let postgresValue = toPostgresValue(fieldValue[cmp]);
         let constraintFieldName;
+        let postgresValue = toPostgresValue(fieldValue[cmp]);
+
         if (fieldName.indexOf('.') >= 0) {
-          let castType;
-          switch (typeof postgresValue) {
-            case 'number':
-              castType = 'double precision';
-              break;
-            case 'boolean':
-              castType = 'boolean';
-              break;
-            default:
-              castType = undefined;
-          }
+          const castType = toPostgresValueCastType(fieldValue[cmp]);
           constraintFieldName = castType
             ? `CAST ((${transformDotField(fieldName)}) AS ${castType})`
             : transformDotField(fieldName);
diff --git a/src/GraphQL/transformers/query.js b/src/GraphQL/transformers/query.js
index a91ee208ad..bf4946f125 100644
--- a/src/GraphQL/transformers/query.js
+++ b/src/GraphQL/transformers/query.js
@@ -108,7 +108,7 @@ const transformQueryConstraintInputToParse = (
      *      }
      *   }
      */
-    if (fieldValue.key && fieldValue.value && parentConstraints && parentFieldName) {
+    if (fieldValue.key && fieldValue.value !== undefined && parentConstraints && parentFieldName) {
       delete parentConstraints[parentFieldName];
       parentConstraints[`${parentFieldName}.${fieldValue.key}`] = {
         ...parentConstraints[`${parentFieldName}.${fieldValue.key}`],