From 2307d8ef2531312c8e01cb73449a659fec209185 Mon Sep 17 00:00:00 2001
From: Wizzer <wizzer@qq.com>
Date: Tue, 16 Mar 2021 17:57:04 +0800
Subject: [PATCH] fix: jdbc connector RestfulResultSet.getString NPE

---
 .../src/main/java/com/taosdata/jdbc/rs/RestfulResultSet.java   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulResultSet.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulResultSet.java
index 30081a63c3..0cbb40dbb6 100644
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulResultSet.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulResultSet.java
@@ -136,7 +136,8 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
             throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_PARAMETER_INDEX_OUT_RANGE, "Column Index out of range, " + columnIndex + " > " + resultSet.get(pos).size());
 
         columnIndex = getTrueColumnIndex(columnIndex);
-        return resultSet.get(pos).get(columnIndex).toString();
+        Object value = resultSet.get(pos).get(columnIndex);
+        return value == null ? null : value.toString();
     }
 
     @Override
-- 
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