Fixes #3469: Fixed the bug that `QueryBuilder::getColumnType()` may drop the…

framework/CHANGELOG.md

@@ -28,6 +28,7 @@ Yii Framework 2 Change Log
 - Bug #3431: Allow using extended ErrorHandler class from the app namespace (cebe)
 - Bug #3436: Fixed the issue that `ServiceLocator` still returns the old component after calling `set()` with a new definition (qiangxue)
 - Bug #3458: Fixed the bug that the image rendered by `CaptchaAction` was using a wrong content type (MDMunir, qiangxue)
+- Bug #3469: Fixed the bug that `QueryBuilder::getColumnType()` may drop the provided column precision in certain cases (qiangxue, Ragazzo)
 - Bug: Fixed inconsistent return of `\yii\console\Application::runAction()` (samdark)
 - Enh #2264: `CookieCollection::has()` will return false for expired or removed cookies (qiangxue)
 - Enh #2435: `yii\db\IntegrityException` is now thrown on database integrity errors instead of general `yii\db\Exception` (samdark)

framework/db/QueryBuilder.php

@@ -591,7 +591,13 @@ class QueryBuilder extends \yii\base\Object
             return $this->typeMap[$type];
         } elseif (preg_match('/^(\w+)\((.+?)\)(.*)$/', $type, $matches)) {
             if (isset($this->typeMap[$matches[1]])) {
-                return preg_replace('/\(.+\)/', '(' . $matches[2] . ')', $this->typeMap[$matches[1]]) . $matches[3];
+                $ptype = $this->typeMap[$matches[1]];
+                if (strpos($ptype, '(') !== false) {
+                    // replace the precision in $ptype with the actual one
+                    return preg_replace('/\(.+\)/', '(' . $matches[2] . ')', $ptype) . $matches[3];
+                } else {
+                    return "{$ptype}({$matches[2]}){$matches[3]}";
+                }
             }
         } elseif (preg_match('/^(\w+)\s+/', $type, $matches)) {
             if (isset($this->typeMap[$matches[1]])) {