From 09c585cdb1056fc48c59541b0c66f20a81282a25 Mon Sep 17 00:00:00 2001
From: Alex Grintsvayg <git@grin.io>
Date: Thu, 1 Jun 2017 09:58:50 -0400
Subject: [PATCH] dont run delete query when there's nothing to delete

---
 templates/singleton/boil_queries.tpl | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/templates/singleton/boil_queries.tpl b/templates/singleton/boil_queries.tpl
index 8ff4edd..248fae1 100644
--- a/templates/singleton/boil_queries.tpl
+++ b/templates/singleton/boil_queries.tpl
@@ -80,6 +80,11 @@ func deleteConflictsBeforeMerge(tx *sql.Tx, conflict conflictingUniqueKey, prima
 		args = append(args, value)
 	}
 
+	// if no rows found, no need to delete anything
+	if len(args) < 2 {
+		return nil
+	}
+
 	query = fmt.Sprintf(
 		"DELETE FROM %s WHERE %s = %s AND %s IN (%s)",
 		conflict.table, conflict.objectIdColumn, strmangle.Placeholders(dialect.IndexPlaceholders, 1, 1, 1),