From c4fc94a7169f8e758eb9a02f8cd446c2e20b165c Mon Sep 17 00:00:00 2001
From: Jia-Xuan Liu <liugs963@gmail.com>
Date: Mon, 18 Nov 2024 13:50:12 +0800
Subject: [PATCH] workaround for array without element type

---
 wren-core/core/src/logical_plan/utils.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/wren-core/core/src/logical_plan/utils.rs b/wren-core/core/src/logical_plan/utils.rs
index 01b50ee25..db5a78188 100644
--- a/wren-core/core/src/logical_plan/utils.rs
+++ b/wren-core/core/src/logical_plan/utils.rs
@@ -25,6 +25,10 @@ use std::collections::HashSet;
 use std::{collections::HashMap, sync::Arc};
 
 fn create_list_type(array_type: &str) -> Result<DataType> {
+    // Workaround for the array type without an element type
+    if array_type.len() == "array".len() {
+        return create_list_type("array<varchar>");
+    }
     if let ast::DataType::Array(value) = parse_type(array_type)? {
         let data_type = match value {
             ArrayElemTypeDef::None => {
@@ -361,6 +365,7 @@ mod test {
             ("null", DataType::Null),
             ("geography", DataType::Utf8),
             ("range", DataType::Utf8),
+            ("array", create_list_type("array<varchar>")?),
             ("array<int64>", create_list_type("array<int64>")?),
             (
                 "struct<name string, age int>",