diff --git a/polyglot/adapter.json b/polyglot/adapter.json
index 5eea53d..85aa6a0 100644
--- a/polyglot/adapter.json
+++ b/polyglot/adapter.json
@@ -171,6 +171,24 @@
 				"parent": {
 					"type": "vector"
 				}
+			},
+			{
+				"from": {
+					"type": "varchar",
+					"hasMaxLength": true
+				},
+				"to": {
+					"length": 10485760
+				}
+			},
+			{
+				"from": {
+					"type": "nvarchar",
+					"hasMaxLength": true
+				},
+				"to": {
+					"length": 10485760
+				}
 			}
 		]
 	},
diff --git a/polyglot/convertAdapter.json b/polyglot/convertAdapter.json
index 09a1b19..ffb0519 100644
--- a/polyglot/convertAdapter.json
+++ b/polyglot/convertAdapter.json
@@ -49,6 +49,15 @@
 				"to": {
 					"subtype": "vector<real>"
 				}
+			},
+			{
+				"from": {
+					"mode": "varchar",
+					"length": 10485760
+				},
+				"to": {
+					"hasMaxLength": true
+				}
 			}
 		]
 	}