diff --git a/ibis-server/app/custom_sqlglot/__init__.py b/ibis-server/app/custom_sqlglot/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/ibis-server/app/custom_sqlglot/dialects/__init__.py b/ibis-server/app/custom_sqlglot/dialects/__init__.py
new file mode 100644
index 000000000..b40c47a3a
--- /dev/null
+++ b/ibis-server/app/custom_sqlglot/dialects/__init__.py
@@ -0,0 +1,3 @@
+# ruff: noqa: F401
+
+from app.custom_sqlglot.dialects.mysql import MySQL
diff --git a/ibis-server/app/custom_sqlglot/dialects/mysql.py b/ibis-server/app/custom_sqlglot/dialects/mysql.py
new file mode 100644
index 000000000..b80439b6b
--- /dev/null
+++ b/ibis-server/app/custom_sqlglot/dialects/mysql.py
@@ -0,0 +1,10 @@
+from sqlglot import exp
+from sqlglot.dialects import MySQL as OriginalMySQL
+
+
+class MySQL(OriginalMySQL):
+    class Generator(OriginalMySQL.Generator):
+        TYPE_MAPPING = {
+            **OriginalMySQL.Generator.TYPE_MAPPING,
+            exp.DataType.Type.VARBINARY: "BINARY",
+        }
diff --git a/ibis-server/app/mdl/rewriter.py b/ibis-server/app/mdl/rewriter.py
index 3d7f466a7..19e93e654 100644
--- a/ibis-server/app/mdl/rewriter.py
+++ b/ibis-server/app/mdl/rewriter.py
@@ -15,6 +15,9 @@
 # To register custom dialects from ibis library for sqlglot
 importlib.import_module("ibis.backends.sql.dialects")
 
+# Register custom dialects
+importlib.import_module("app.custom_sqlglot.dialects")
+
 
 class Rewriter(ABC):
     def __init__(self, manifest_str: str, data_source: DataSource = None):
diff --git a/ibis-server/app/util.py b/ibis-server/app/util.py
index 616514c2c..615c5ff86 100644
--- a/ibis-server/app/util.py
+++ b/ibis-server/app/util.py
@@ -30,6 +30,8 @@ def default(obj):
             return None
         if isinstance(obj, decimal.Decimal):
             return str(obj)
+        if isinstance(obj, (bytes, bytearray)):
+            return obj.hex()
         raise TypeError
 
     json_obj = orjson.loads(
diff --git a/ibis-server/tests/routers/v2/connector/test_bigquery.py b/ibis-server/tests/routers/v2/connector/test_bigquery.py
index 6bc6765ce..f24ff56b0 100644
--- a/ibis-server/tests/routers/v2/connector/test_bigquery.py
+++ b/ibis-server/tests/routers/v2/connector/test_bigquery.py
@@ -60,6 +60,11 @@
                     "expression": "cast(NULL as timestamp)",
                     "type": "timestamp",
                 },
+                {
+                    "name": "bytea_column",
+                    "expression": "cast('abc' as bytea)",
+                    "type": "bytea",
+                },
             ],
             "primaryKey": "orderkey",
         },
@@ -92,6 +97,7 @@ def test_query():
         "2024-01-01 23:59:59.000000",
         "2024-01-01 23:59:59.000000 UTC",
         None,
+        "616263",
     ]
     assert result["dtypes"] == {
         "orderkey": "int64",
@@ -103,6 +109,7 @@ def test_query():
         "timestamp": "object",
         "timestamptz": "object",
         "test_null_time": "datetime64[ns]",
+        "bytea_column": "object",
     }
 
 
diff --git a/ibis-server/tests/routers/v2/connector/test_clickhouse.py b/ibis-server/tests/routers/v2/connector/test_clickhouse.py
index fd1b2b009..58a214951 100644
--- a/ibis-server/tests/routers/v2/connector/test_clickhouse.py
+++ b/ibis-server/tests/routers/v2/connector/test_clickhouse.py
@@ -57,6 +57,11 @@
                     "expression": "toDateTime64(NULL, 9)",
                     "type": "timestamp",
                 },
+                {
+                    "name": "bytea_column",
+                    "expression": "cast('abc' as bytea)",
+                    "type": "bytea",
+                },
                 {
                     "name": "customer",
                     "type": "Customer",
@@ -167,7 +172,7 @@ def test_query(clickhouse: ClickHouseContainer):
     )
     assert response.status_code == 200
     result = response.json()
-    assert len(result["columns"]) == 9
+    assert len(result["columns"]) == 10
     assert len(result["data"]) == 1
     assert result["data"][0] == [
         1,
@@ -179,6 +184,7 @@ def test_query(clickhouse: ClickHouseContainer):
         "2024-01-01 23:59:59.000000",
         "2024-01-01 23:59:59.000000 UTC",
         None,
+        "abc",  # Clickhouse does not support bytea, so it is returned as string
     ]
     assert result["dtypes"] == {
         "orderkey": "int32",
@@ -190,6 +196,7 @@ def test_query(clickhouse: ClickHouseContainer):
         "timestamp": "object",
         "timestamptz": "object",
         "test_null_time": "object",
+        "bytea_column": "object",
     }
 
 
@@ -205,7 +212,7 @@ def test_query_with_connection_url(clickhouse: ClickHouseContainer):
     )
     assert response.status_code == 200
     result = response.json()
-    assert len(result["columns"]) == 9
+    assert len(result["columns"]) == 10
     assert len(result["data"]) == 1
     assert result["data"][0][0] == 1
     assert result["dtypes"] is not None
diff --git a/ibis-server/tests/routers/v2/connector/test_mssql.py b/ibis-server/tests/routers/v2/connector/test_mssql.py
index 1fc3b1819..c46f9e876 100644
--- a/ibis-server/tests/routers/v2/connector/test_mssql.py
+++ b/ibis-server/tests/routers/v2/connector/test_mssql.py
@@ -57,6 +57,11 @@
                     "expression": "cast(NULL as timestamp)",
                     "type": "timestamp",
                 },
+                {
+                    "name": "bytea_column",
+                    "expression": "cast('abc' as bytea)",
+                    "type": "bytea",
+                },
             ],
             "primaryKey": "orderkey",
         },
@@ -103,6 +108,7 @@ def test_query(mssql: SqlServerContainer):
         "2024-01-01 23:59:59.000000",
         "2024-01-01 23:59:59.000000 UTC",
         None,
+        "616263",
     ]
     assert result["dtypes"] == {
         "orderkey": "int32",
@@ -114,6 +120,7 @@ def test_query(mssql: SqlServerContainer):
         "timestamp": "object",
         "timestamptz": "object",
         "test_null_time": "datetime64[ns]",
+        "bytea_column": "object",
     }
 
 
diff --git a/ibis-server/tests/routers/v2/connector/test_mysql.py b/ibis-server/tests/routers/v2/connector/test_mysql.py
index 8051ce1a7..23b4af573 100644
--- a/ibis-server/tests/routers/v2/connector/test_mysql.py
+++ b/ibis-server/tests/routers/v2/connector/test_mysql.py
@@ -58,6 +58,11 @@
                     "expression": "cast(NULL as timestamp)",
                     "type": "timestamp",
                 },
+                {
+                    "name": "bytea_column",
+                    "expression": "cast('abc' as bytea)",
+                    "type": "bytea",
+                },
             ],
             "primaryKey": "orderkey",
         },
@@ -123,6 +128,7 @@ def test_query(mysql: MySqlContainer):
         "2024-01-01 23:59:59.000000",
         "2024-01-01 23:59:59.000000",
         None,
+        "616263",
     ]
     assert result["dtypes"] == {
         "orderkey": "int32",
@@ -134,6 +140,7 @@ def test_query(mysql: MySqlContainer):
         "timestamp": "object",
         "timestamptz": "object",
         "test_null_time": "datetime64[ns]",
+        "bytea_column": "object",
     }
 
 
diff --git a/ibis-server/tests/routers/v2/connector/test_postgres.py b/ibis-server/tests/routers/v2/connector/test_postgres.py
index 336178560..8266fc249 100644
--- a/ibis-server/tests/routers/v2/connector/test_postgres.py
+++ b/ibis-server/tests/routers/v2/connector/test_postgres.py
@@ -59,6 +59,11 @@
                     "expression": "cast(NULL as timestamp)",
                     "type": "timestamp",
                 },
+                {
+                    "name": "bytea_column",
+                    "expression": "cast('abc' as bytea)",
+                    "type": "bytea",
+                },
             ],
             "primaryKey": "orderkey",
         },
@@ -91,7 +96,7 @@ def test_query(postgres: PostgresContainer):
     )
     assert response.status_code == 200
     result = response.json()
-    assert len(result["columns"]) == 9
+    assert len(result["columns"]) == len(manifest["models"][0]["columns"])
     assert len(result["data"]) == 1
     assert result["data"][0] == [
         1,
@@ -103,6 +108,7 @@ def test_query(postgres: PostgresContainer):
         "2024-01-01 23:59:59.000000",
         "2024-01-01 23:59:59.000000 UTC",
         None,
+        "616263",
     ]
     assert result["dtypes"] == {
         "orderkey": "int32",
@@ -114,6 +120,7 @@ def test_query(postgres: PostgresContainer):
         "timestamp": "object",
         "timestamptz": "object",
         "test_null_time": "datetime64[ns]",
+        "bytea_column": "object",
     }
 
 
@@ -129,7 +136,7 @@ def test_query_with_connection_url(postgres: PostgresContainer):
     )
     assert response.status_code == 200
     result = response.json()
-    assert len(result["columns"]) == 9
+    assert len(result["columns"]) == len(manifest["models"][0]["columns"])
     assert len(result["data"]) == 1
     assert result["data"][0][0] == 1
     assert result["dtypes"] is not None
diff --git a/ibis-server/tests/routers/v2/connector/test_trino.py b/ibis-server/tests/routers/v2/connector/test_trino.py
index a931a5af5..669aa2b47 100644
--- a/ibis-server/tests/routers/v2/connector/test_trino.py
+++ b/ibis-server/tests/routers/v2/connector/test_trino.py
@@ -54,6 +54,11 @@
                     "expression": "cast(NULL as timestamp)",
                     "type": "timestamp",
                 },
+                {
+                    "name": "bytea_column",
+                    "expression": "cast('abc' as bytea)",
+                    "type": "bytea",
+                },
             ],
             "primaryKey": "orderkey",
         },
@@ -94,6 +99,7 @@ def test_query(trino: TrinoContainer):
         "2024-01-01 23:59:59.000000",
         "2024-01-01 23:59:59.000000 UTC",
         None,
+        "616263",
     ]
     assert result["dtypes"] == {
         "orderkey": "int64",
@@ -105,6 +111,7 @@ def test_query(trino: TrinoContainer):
         "timestamp": "object",
         "timestamptz": "object",
         "test_null_time": "datetime64[ns]",
+        "bytea_column": "object",
     }