Add new dialect spread APIs

Author: mythz

src/ServiceStack.OrmLite/OrmLiteDialectProviderExtensions.cs

@@ -121,5 +121,9 @@ public static void InitDbParam(this IOrmLiteDialectProvider dialect, IDbDataPara
             converter.InitDbParam(dbParam, columnType);
             dbParam.Value = converter.ToDbValue(columnType, value);
         }
+
+        public static string SqlSpread<T>(this IOrmLiteDialectProvider dialect, params T[] values) =>
+            OrmLiteUtils.SqlJoin(values, dialect);
+
     }
 }

tests/ServiceStack.OrmLite.Tests/SqlDialectTests.cs

@@ -0,0 +1,24 @@
+using NUnit.Framework;
+
+namespace ServiceStack.OrmLite.Tests
+{
+    [TestFixtureOrmLite]
+    public class SqlDialectTests : OrmLiteProvidersTestBase
+    {
+        public SqlDialectTests(DialectContext context) : base(context) { }
+
+        [Test]
+        public void Does_spread_values()
+        {
+            using var db = OpenDbConnection();
+            var dialect = db.GetDialectProvider();
+            Assert.That(dialect.SqlSpread((int[])null), Is.EqualTo(""));
+            Assert.That(dialect.SqlSpread((string[])null), Is.EqualTo(""));
+            Assert.That(dialect.SqlSpread(new int[0]), Is.EqualTo(""));
+            Assert.That(dialect.SqlSpread(new string[0]), Is.EqualTo(""));
+            Assert.That(dialect.SqlSpread(1, 2, 3), Is.EqualTo("1,2,3"));
+            Assert.That(dialect.SqlSpread("A", "B", "C"), Is.EqualTo("'A','B','C'"));
+            Assert.That(dialect.SqlSpread("A'B", "C\"D"), Is.EqualTo("'A''B','C\"D'"));
+        }
+    }
+}