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 b1d6d877e8..0347964352 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
@@ -3260,7 +3260,7 @@ public class SessionVariable implements Serializable, Writable {
         tResult.setInvertedIndexConjunctionOptThreshold(invertedIndexConjunctionOptThreshold);
         tResult.setInvertedIndexMaxExpansions(invertedIndexMaxExpansions);
 
-        tResult.setEnableDecimal256(enableNereidsPlanner && enableDecimal256);
+        tResult.setEnableDecimal256(getEnableDecimal256());
 
         tResult.setSkipMissingVersion(skipMissingVersion);
 
@@ -3654,7 +3654,7 @@ public class SessionVariable implements Serializable, Writable {
             return false;
         }
         SessionVariable sessionVariable = connectContext.getSessionVariable();
-        return sessionVariable.isEnableNereidsPlanner() && sessionVariable.isEnableDecimal256();
+        return connectContext.getState().isNereids() && sessionVariable.isEnableDecimal256();
     }
 
     public boolean isEnableDecimal256() {