diff --git a/fe/fe-core/src/main/java/org/apache/doris/load/Load.java b/fe/fe-core/src/main/java/org/apache/doris/load/Load.java
index 905f9507378a81..ea381977e24f78 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/load/Load.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/load/Load.java
@@ -1049,8 +1049,12 @@ private static void initColumns(Table tbl, List<ImportColumnDesc> columnExprs,
         for (ImportColumnDesc importColumnDesc : copiedColumnExprs) {
             // make column name case match with real column name
             String columnName = importColumnDesc.getColumnName();
-            String realColName = tbl.getColumn(columnName) == null ? columnName
-                    : tbl.getColumn(columnName).getName();
+            String realColName;
+            if (tbl.getColumn(columnName) == null || importColumnDesc.getExpr() == null) {
+                realColName = columnName;
+            } else {
+                realColName = tbl.getColumn(columnName).getName();
+            }
             if (importColumnDesc.getExpr() != null) {
                 Expr expr = transformHadoopFunctionExpr(tbl, realColName, importColumnDesc.getExpr());
                 exprsByName.put(realColName, expr);
diff --git a/fe/fe-core/src/main/java/org/apache/doris/planner/BrokerScanNode.java b/fe/fe-core/src/main/java/org/apache/doris/planner/BrokerScanNode.java
index 73aa1fb04d3cf9..7faacde1dbf82f 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/planner/BrokerScanNode.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/planner/BrokerScanNode.java
@@ -247,8 +247,8 @@ private void initParams(ParamCreateContext context)
      */
     private void initColumns(ParamCreateContext context) throws UserException {
         context.srcTupleDescriptor = analyzer.getDescTbl().createTupleDescriptor();
-        context.slotDescByName = Maps.newHashMap();
-        context.exprMap = Maps.newHashMap();
+        context.slotDescByName = Maps.newTreeMap(String.CASE_INSENSITIVE_ORDER);
+        context.exprMap = Maps.newTreeMap(String.CASE_INSENSITIVE_ORDER);
 
         // for load job, column exprs is got from file group
         // for query, there is no column exprs, they will be got from table's schema in "Load.initColumns"
diff --git a/fe/fe-core/src/main/java/org/apache/doris/planner/StreamLoadScanNode.java b/fe/fe-core/src/main/java/org/apache/doris/planner/StreamLoadScanNode.java
index 0930bad5f0036f..65a265d9c56009 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/planner/StreamLoadScanNode.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/planner/StreamLoadScanNode.java
@@ -66,8 +66,11 @@ public class StreamLoadScanNode extends LoadScanNode {
     private TupleDescriptor srcTupleDesc;
     private TBrokerScanRange brokerScanRange;
 
-    private Map<String, SlotDescriptor> slotDescByName = Maps.newHashMap();
-    private Map<String, Expr> exprsByName = Maps.newHashMap();
+    // If use case sensitive map, for example,
+    // the column name 「A」 in the table and the mapping '(a) set (A = a)' in load sql，
+    // Slotdescbyname stores「a」, later will use 「a」to get table's 「A」 column info, will throw exception.
+    private final Map<String, SlotDescriptor> slotDescByName = Maps.newTreeMap(String.CASE_INSENSITIVE_ORDER);
+    private final Map<String, Expr> exprsByName = Maps.newTreeMap(String.CASE_INSENSITIVE_ORDER);
 
     // used to construct for streaming loading
     public StreamLoadScanNode(