From 98c358914efb4988ffc83cf8e47fda9342857683 Mon Sep 17 00:00:00 2001
From: Gang Wu <ustcwg@gmail.com>
Date: Fri, 27 Sep 2024 09:48:09 +0800
Subject: [PATCH] add geoparquet column metadata back

---
 src/main/thrift/parquet.thrift | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/thrift/parquet.thrift b/src/main/thrift/parquet.thrift
index 77af877b2..47a28433c 100644
--- a/src/main/thrift/parquet.thrift
+++ b/src/main/thrift/parquet.thrift
@@ -570,9 +570,13 @@ struct GeometryType {
   4: optional string crs_encoding;
   /**
    * Additional informative metadata as a list of key-value pair of UTF-8 string.
+   *
    * It is not strictly required by the low-level Parquet implementation for
    * features like statistics or filter pushdown. Using a list of key-value pair
    * provides maximum flexibility for adding future informative metadata.
+   *
+   * GeoParquet could store its column metadata in this field:
+   * https://github.com/opengeospatial/geoparquet/blob/v1.1.0/format-specs/geoparquet.md?plain=1#L46
    */
   5: optional list<KeyValue> key_value_metadata;
 }