fix: empty return7

sql/aws_pgvector_contract.sql

@@ -370,7 +370,7 @@ BEGIN
                         SELECT 1
                         FROM jsonb_array_elements_text($4->'tags') AS allowed(value)
                         WHERE lower(COALESCE(e.metadata->>'tags', ''))
-                              LIKE ('%' || lower(allowed.value) || '%')
+                              LIKE ('%%' || lower(allowed.value) || '%%')
                     )
               )
               AND (

tests/test_sql_contract.py

@@ -0,0 +1,11 @@
+from pathlib import Path
+
+
+def test_hybrid_search_dynamic_sql_escapes_format_percent_signs() -> None:
+    contract = Path("sql/aws_pgvector_contract.sql").read_text(encoding="utf-8")
+    dynamic_sql = contract.split("RETURN QUERY EXECUTE format($query$", maxsplit=1)[1]
+    dynamic_sql = dynamic_sql.split("$query$, target_table)", maxsplit=1)[0]
+
+    remaining_percent_signs = dynamic_sql.replace("%%", "").replace("%I", "")
+
+    assert "%" not in remaining_percent_signs