fix(query-generator): allow Op as comparator in sequelize.where (#9124)

lib/dialects/abstract/query-generator.js

@@ -1861,6 +1861,10 @@ const QueryGenerator = {
   handleSequelizeMethod(smth, tableName, factory, options, prepend) {
     let result;
 
+    if (this.OperatorMap.hasOwnProperty(smth.comparator)) {
+      smth.comparator = this.OperatorMap[smth.comparator];
+    }
+
     if (smth instanceof Utils.Where) {
       let value = smth.logic;
       let key;

lib/sequelize.js

@@ -927,7 +927,7 @@ class Sequelize {
    * @see {@link Model.findAll}
    *
    * @param {Object} attr The attribute, which can be either an attribute object from `Model.rawAttributes` or a sequelize object, for example an instance of `sequelize.fn`. For simple string attributes, use the POJO syntax
-   * @param {string} [comparator='=']
+   * @param {String|Op} [comparator='=']
    * @param {String|Object} logic The condition. Can be both a simply type, or a further condition (`or`, `and`, `.literal` etc.)
    * @alias condition
    * @since v2.0.0-dev3

test/unit/sql/where.test.js

@@ -1117,5 +1117,13 @@ suite(Support.getTestDialectTeaser('SQL'), () => {
     testsql(current.where(current.fn('lower', current.col('name')), null), {
       default: 'lower([name]) IS NULL'
     });
+
+    testsql(current.where(current.fn('SUM', current.col('hours')), '>', 0), {
+      default: 'SUM([hours]) > 0'
+    });
+
+    testsql(current.where(current.fn('SUM', current.col('hours')), current.Op.gt, 0), {
+      default: 'SUM([hours]) > 0'
+    });
   });
 });