From d860e0182cf740eec66741298a57b1085ab171bc Mon Sep 17 00:00:00 2001
From: Arjan Scherpenisse <arjan@scherpenisse.net>
Date: Sun, 15 Jun 2014 09:17:52 +0200
Subject: [PATCH] Return SQLITE_CONSTRAINT error

---
 c_src/esqlite3_nif.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/c_src/esqlite3_nif.c b/c_src/esqlite3_nif.c
index b9d8784..5861bb1 100644
--- a/c_src/esqlite3_nif.c
+++ b/c_src/esqlite3_nif.c
@@ -508,6 +508,8 @@ do_step(ErlNifEnv *env, sqlite3 *db, sqlite3_stmt *stmt)
         return make_sqlite3_error_tuple(env, rc, db);
     if(rc == SQLITE_MISUSE)
         return make_error_tuple(env, "misuse");
+    if(rc == SQLITE_CONSTRAINT)
+        return make_sqlite3_error_tuple(env, rc, db);
 
     return make_error_tuple(env, "unexpected_return_value");
 }