diff --git a/txlcn-tc/src/main/java/com/codingapi/txlcn/tc/core/transaction/txc/analy/PrimaryKeyListVisitor.java b/txlcn-tc/src/main/java/com/codingapi/txlcn/tc/core/transaction/txc/analy/PrimaryKeyListVisitor.java
index 6821c1814..02ed9ff17 100644
--- a/txlcn-tc/src/main/java/com/codingapi/txlcn/tc/core/transaction/txc/analy/PrimaryKeyListVisitor.java
+++ b/txlcn-tc/src/main/java/com/codingapi/txlcn/tc/core/transaction/txc/analy/PrimaryKeyListVisitor.java
@@ -80,7 +80,7 @@ private Map<String, Object> newKeyValues(List<Expression> expressions) {
             if (primaryKeys.contains(columns.get(i).getFullyQualifiedName())) {
                 Object expression = null;
                 if (expressions.get(i).getASTNode() != null) {
-                    expressions.get(i).getASTNode().jjtGetValue();
+                    expression = expressions.get(i).getASTNode().jjtGetValue();
                 } else {
                     expression = expressions.get(i);
                 }