diff --git a/fe/fe-common/src/main/java/org/apache/doris/common/Config.java b/fe/fe-common/src/main/java/org/apache/doris/common/Config.java
index 51b4d4073c..5ea73a3ddb 100644
--- a/fe/fe-common/src/main/java/org/apache/doris/common/Config.java
+++ b/fe/fe-common/src/main/java/org/apache/doris/common/Config.java
@@ -1979,5 +1979,11 @@ public class Config extends ConfigBase {
 
     @ConfField(mutable = false)
     public static int topn_two_phase_limit_threshold = 512;
+
+    /**
+     * Used to set session variables randomly to check more issues in github workflow
+     */
+    @ConfField(mutable = true)
+    public static int pull_request_id = 0;
 }
 
diff --git a/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java b/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
index 3085fcb1b9..d151d620ff 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
@@ -719,6 +719,16 @@ public class SessionVariable implements Serializable, Writable {
                 this.externalSortBytesThreshold = 100 * 1024 * 1024 * 1024;
                 break;
         }
+        // pull_request_id default value is 0
+        if (Config.pull_request_id % 2 == 1) {
+            // this.enablePipelineEngine = true;
+            this.enableFoldConstantByBe = true;
+            // this.enableTwoPhaseReadOpt = false;
+        } else {
+            this.enablePipelineEngine = false;
+            this.enableFoldConstantByBe = false;
+            this.enableTwoPhaseReadOpt = true;
+        }
     }
 
     /**