diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/NereidsParser.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/NereidsParser.java
index 3699f26578f929..4890ddd214d5ae 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/NereidsParser.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/NereidsParser.java
@@ -36,6 +36,7 @@
 import org.apache.doris.qe.ConnectContext;
 import org.apache.doris.qe.SessionVariable;
 
+import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import org.antlr.v4.runtime.CharStreams;
@@ -67,6 +68,8 @@ public class NereidsParser {
 
     private static final BitSet EXPLAIN_TOKENS = new BitSet();
 
+    private static final Map<String, Integer> LITERAL_TOKENS;
+
     static {
         EXPLAIN_TOKENS.set(DorisLexer.EXPLAIN);
         EXPLAIN_TOKENS.set(DorisLexer.PARSED);
@@ -78,6 +81,14 @@ public class NereidsParser {
         EXPLAIN_TOKENS.set(DorisLexer.PLAN);
         EXPLAIN_TOKENS.set(DorisLexer.PROCESS);
 
+        ImmutableMap.Builder<String, Integer> literalToTokenType = ImmutableMap.builder();
+        for (int tokenType = 0; tokenType <= DorisLexer.VOCABULARY.getMaxTokenType(); tokenType++) {
+            String literalName = DorisLexer.VOCABULARY.getLiteralName(tokenType);
+            if (literalName != null) {
+                literalToTokenType.put(literalName.substring(1, literalName.length() - 1), tokenType);
+            }
+        }
+        LITERAL_TOKENS = literalToTokenType.build();
     }
 
     /**
@@ -264,7 +275,7 @@ public Expression parseExpression(String expression) {
     }
 
     private boolean isSimpleIdentifier(String expression) {
-        if (expression == null || expression.length() == 0) {
+        if (expression == null || expression.isEmpty()) {
             return false;
         }
 
@@ -277,7 +288,7 @@ private boolean isSimpleIdentifier(String expression) {
                 return false;
             }
         }
-        return hasLetter;
+        return hasLetter && !LITERAL_TOKENS.containsKey(expression.toUpperCase());
     }
 
     public DataType parseDataType(String dataType) {