From 552959df2d01e2805288b6a509efe0395b39bd7b Mon Sep 17 00:00:00 2001
From: 1fanwang <1fannnw@gmail.com>
Date: Sat, 29 Aug 2026 08:38:00 -0400
Subject: [PATCH] [fix](fe) Accept BLOB prepared statement parameters

### What problem does this PR solve?

Issue Number: close https://github.com/apache/doris/issues/67301

Problem Summary: Doris rejects wide ODBC strings because their prepared parameters use BLOB type codes.

### Release note

Prepared statements accept MySQL BLOB string parameters.

### Check List (For Author)

- Test: Unit Test
- Behavior changed: Yes
- Documentation: No

Signed-off-by: 1fanwang <1fannnw@gmail.com>
---
 .../trees/expressions/literal/Literal.java    |  4 +++
 .../trees/expressions/LiteralTest.java        | 26 +++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/Literal.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/Literal.java
index 1c368179005be3..8e73124831fae3 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/Literal.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/Literal.java
@@ -562,6 +562,10 @@ public static Literal getLiteralByMysqlType(MysqlColType mysqlType, boolean isUn
             case MYSQL_TYPE_TIMESTAMP2:
                 literal = handleDateTimeLiteral(data);
                 break;
+            case MYSQL_TYPE_TINY_BLOB:
+            case MYSQL_TYPE_MEDIUM_BLOB:
+            case MYSQL_TYPE_LONG_BLOB:
+            case MYSQL_TYPE_BLOB:
             case MYSQL_TYPE_STRING:
             case MYSQL_TYPE_VARSTRING:
                 literal = handleStringLiteral(data);
diff --git a/fe/fe-core/src/test/java/org/apache/doris/nereids/trees/expressions/LiteralTest.java b/fe/fe-core/src/test/java/org/apache/doris/nereids/trees/expressions/LiteralTest.java
index 4964414e6b3db5..4cddc446332532 100644
--- a/fe/fe-core/src/test/java/org/apache/doris/nereids/trees/expressions/LiteralTest.java
+++ b/fe/fe-core/src/test/java/org/apache/doris/nereids/trees/expressions/LiteralTest.java
@@ -17,6 +17,8 @@
 
 package org.apache.doris.nereids.trees.expressions;
 
+import org.apache.doris.catalog.MysqlColType;
+import org.apache.doris.mysql.MysqlSerializer;
 import org.apache.doris.nereids.trees.expressions.literal.ArrayLiteral;
 import org.apache.doris.nereids.trees.expressions.literal.BooleanLiteral;
 import org.apache.doris.nereids.trees.expressions.literal.IntegerLiteral;
@@ -36,6 +38,8 @@
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -57,6 +61,28 @@ public void testEqual() {
         Assertions.assertTrue(Literal.of(false) instanceof BooleanLiteral);
     }
 
+    @Test
+    public void testMysqlBlobParameter() {
+        String value = "Doris 数据";
+        for (MysqlColType mysqlType : Arrays.asList(
+                MysqlColType.MYSQL_TYPE_TINY_BLOB,
+                MysqlColType.MYSQL_TYPE_MEDIUM_BLOB,
+                MysqlColType.MYSQL_TYPE_LONG_BLOB,
+                MysqlColType.MYSQL_TYPE_BLOB)) {
+            MysqlSerializer serializer = MysqlSerializer.newInstance();
+            serializer.writeLenEncodedString(value);
+            serializer.writeInt1(0x7f);
+            ByteBuffer data = serializer.toByteBuffer().order(ByteOrder.LITTLE_ENDIAN);
+
+            Literal literal = Literal.getLiteralByMysqlType(mysqlType, false, data);
+
+            Assertions.assertTrue(literal instanceof StringLiteral, mysqlType.name());
+            Assertions.assertEquals(value, literal.getStringValue(), mysqlType.name());
+            Assertions.assertEquals(1, data.remaining(), mysqlType.name());
+            Assertions.assertEquals(0x7f, Byte.toUnsignedInt(data.get()), mysqlType.name());
+        }
+    }
+
     @Test
     public void testGetResultExpressionArrayInt() {
         int num = 10;