diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/Brackets.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/Brackets.java
index e4220922..1d37f44b 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/Brackets.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/Brackets.java
@@ -83,15 +83,15 @@ public class Brackets extends QueryCondition {
         if (checkEffective()) {
             String childSql = childCondition.toSql(queryTables, dialect);
             if (StringUtil.isNotBlank(childSql)) {
-                QueryCondition prevCondition = getPrevEffectiveCondition();
-                if (prevCondition != null) {
-                    childSql = prevCondition.connector + "(" + childSql + ")";
+                QueryCondition prevEffectiveCondition = getPrevEffectiveCondition();
+                if (prevEffectiveCondition != null) {
+                    childSql = prevEffectiveCondition.connector + "(" + childSql + ")";
                 } else if (StringUtil.isNotBlank(sqlNext)) {
                     childSql = "(" + childSql + ")";
                 }
                 sql.append(childSql);
             } else {
-                //all child conditions is not effective
+                //all child conditions are not effective
                 //fixed gitee #I6W89G
                 this.effective = false;
             }
diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/QueryCondition.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/QueryCondition.java
index d71bd807..98f10a09 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/QueryCondition.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/QueryCondition.java
@@ -217,13 +217,10 @@ public class QueryCondition implements CloneSupport<QueryCondition> {
 
 
     protected QueryCondition getPrevEffectiveCondition() {
-        if (prev != null && prev.checkEffective()) {
-            return prev;
-        } else if (prev != null) {
-            return prev.getPrevEffectiveCondition();
-        } else {
+        if (prev == null) {
             return null;
         }
+        return prev.checkEffective() ? prev : prev.getPrevEffectiveCondition();
     }