diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/ExplicitlyCastableSignature.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/ExplicitlyCastableSignature.java
index a8a831ae1b1d76..c666fe0ca286e1 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/ExplicitlyCastableSignature.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/ExplicitlyCastableSignature.java
@@ -22,6 +22,7 @@
 import org.apache.doris.nereids.analyzer.ComplexDataType;
 import org.apache.doris.nereids.types.DataType;
 import org.apache.doris.nereids.types.NullType;
+import org.apache.doris.nereids.types.VariantType;
 import org.apache.doris.nereids.types.coercion.AnyDataType;
 import org.apache.doris.nereids.types.coercion.FollowToAnyDataType;
 
@@ -50,6 +51,9 @@ static boolean isPrimitiveExplicitlyCastable(DataType signatureType, DataType re
         if (realType instanceof NullType) {
             return true;
         }
+        if (signatureType instanceof VariantType) {
+            return false;
+        }
         if (signatureType instanceof ComplexDataType && !(realType instanceof ComplexDataType)) {
             return false;
         }
diff --git a/regression-test/suites/variant_p0/load.groovy b/regression-test/suites/variant_p0/load.groovy
index cbd6bc1178c3c8..43963b2ff7622d 100644
--- a/regression-test/suites/variant_p0/load.groovy
+++ b/regression-test/suites/variant_p0/load.groovy
@@ -473,6 +473,13 @@ suite("regression_test_variant", "nonConcurrent"){
         sql """insert into var_as_key values(2, '{"b" : 11}')"""
         qt_sql "select * from var_as_key order by k"
 
+        test {
+            sql """
+                SELECT "1234"["abc"]
+            """ 
+            exception("errCode = 2, detailMessage = Can not find the compatibility")
+        }
+
     } finally {
         // reset flags
         set_be_config.call("variant_ratio_of_defaults_as_sparse_column", "0.95")