Fix up SQLite INSERT query generation

The UNION ALL transformation had to be updated so it reflected the root
query type using named placeholders instead of nameless ones.

src/Database/Dialect/SqliteDialectTrait.php

@@ -116,15 +116,21 @@ protected function _insertQueryTranslator($query) {
 
 		$newQuery = $query->connection()->newQuery();
 		$cols = $v->columns();
+		$placeholder = 0;
 		$replaceQuery = false;
+
 		foreach ($v->values() as $k => $val) {
 			$fillLength = count($cols) - count($val);
 			if ($fillLength > 0) {
 				$val = array_merge($val, array_fill(0, $fillLength, null));
 			}
-			$val = array_map(function ($val) {
-				return $val instanceof ExpressionInterface ? $val : '?';
-			}, $val);
+
+			foreach ($val as $col => $attr) {
+				if (!($attr instanceof ExpressionInterface)) {
+					$val[$col] = sprintf(':c%d', $placeholder);
+					$placeholder++;
+				}
+			}
 
 			$select = array_combine($cols, $val);
 			if ($k === 0) {