feat: add query execution for mode discovery

lib/sql.js

@@ -2182,3 +2182,20 @@ SQLConnector.prototype.discoverUniqueKeys = function(table, options, cb) {
   const sql = self.buildQueryUniqueKeys(schema, table);
   this.execute(sql, cb);
 };
+
+/**
+ * Discover if database is in strict mode
+ * @param {Function} [cb] The callback function
+ */
+SQLConnector.prototype.discoverIsStrict = function(cb) {
+  const self = this;
+  const sql = self.buildQueryIsStrict();
+  this.execute(sql, cb);
+};
+
+/**
+ * Build sql for checking if database is in strict mode
+ */
+SQLConnector.prototype.buildQueryIsStrict = function() {
+  throw new Error(g.f('{{isStrict}} must be implemented by the connector'));
+};

test/connectors/test-sql-connector.js

@@ -262,3 +262,7 @@ TestConnector.prototype.executeSQL = function(sql, params, options, callback) {
     callback(null, result);
   }
 };
+
+TestConnector.prototype.buildQueryIsStrict = function() {
+  return 'SELECT 1 AS globalStrictMode, 1 AS sessionStrictMode';
+};

test/sql.test.js

@@ -667,4 +667,23 @@ describe('sql connector', function() {
       });
     });
   });
+
+  it(
+    'should throw an error if buildQueryIsStrict is not implemented by SQLconnector',
+    function() {
+      const baseConnector = new SQLConnector();
+      expect(function() {
+        baseConnector.buildQueryIsStrict();
+      }).to.throw('isStrict must be implemented by the connector');
+    },
+  );
+
+  it('should support discoverIsStrict method', function(done) {
+    connector.discoverIsStrict(function(err, data) {
+      // eslint-disable-next-line no-unused-expressions
+      expect(err).to.be.null;
+      expect(data).to.be.an('array');
+      done(err);
+    });
+  });
 });