should be it

external/duckdb/test/sql/storage/overflow_strings/load_overflow_strings_slowly.test_slow

@@ -0,0 +1,53 @@
+# name: test/sql/storage/overflow_strings/load_overflow_strings_slowly.test_slow
+# description: Test loading overflow strings in small batches
+# group: [overflow_strings]
+
+load __TEST_DIR__/overflow_strings.db
+
+loop x 0 10
+
+statement ok
+CREATE TABLE strings(s VARCHAR);
+
+statement ok
+pragma force_compression='uncompressed'
+
+# load large strings into the table iteratively
+loop it 0 10
+
+statement ok
+INSERT INTO strings
+SELECT
+	repeat(
+		'X',
+		CASE WHEN i % 17 = 0
+		THEN 5000
+		ELSE i % 7
+		END
+	) AS s
+FROM generate_series(0, 2500) tbl(i);
+
+statement ok
+CHECKPOINT;
+
+endloop
+
+# And verify that no other compression is used
+query I
+SELECT compression FROM pragma_storage_info('strings') WHERE segment_type == 'VARCHAR' AND compression != 'Uncompressed';
+----
+
+query I
+SELECT EXISTS (SELECT * FROM pragma_storage_info('strings') WHERE contains(segment_info, 'Overflow String'));
+----
+true
+
+# ensure that the expected total storage size is the same as in the first iteration of the loop
+
+query I nosort expected_blocks
+SELECT total_blocks FROM pragma_database_size();
+
+statement ok
+DROP TABLE strings;
+
+endloop