From f9f5ae61df62957e5d559b124ad4f800265830e0 Mon Sep 17 00:00:00 2001
From: Andrew Kane <andrew@ankane.org>
Date: Tue, 15 Aug 2023 23:44:18 -0700
Subject: [PATCH] Added test for select with no data for ivfflat

---
 test/expected/ivfflat_l2.out | 9 +++++++++
 test/sql/ivfflat_l2.sql      | 3 +++
 2 files changed, 12 insertions(+)

diff --git a/test/expected/ivfflat_l2.out b/test/expected/ivfflat_l2.out
index ae7670c..bef78ae 100644
--- a/test/expected/ivfflat_l2.out
+++ b/test/expected/ivfflat_l2.out
@@ -27,4 +27,13 @@ SELECT COUNT(*) FROM t;
      5
 (1 row)
 
+TRUNCATE t;
+NOTICE:  ivfflat index created with little data
+DETAIL:  This will cause low recall.
+HINT:  Drop the index until the table has more data.
+SELECT * FROM t ORDER BY val <-> '[3,3,3]';
+ val 
+-----
+(0 rows)
+
 DROP TABLE t;
diff --git a/test/sql/ivfflat_l2.sql b/test/sql/ivfflat_l2.sql
index 4772978..c309519 100644
--- a/test/sql/ivfflat_l2.sql
+++ b/test/sql/ivfflat_l2.sql
@@ -10,4 +10,7 @@ SELECT * FROM t ORDER BY val <-> '[3,3,3]';
 SELECT * FROM t ORDER BY val <-> (SELECT NULL::vector);
 SELECT COUNT(*) FROM t;
 
+TRUNCATE t;
+SELECT * FROM t ORDER BY val <-> '[3,3,3]';
+
 DROP TABLE t;