From e00ff9dd3234ee69ff92dc785c58089f27396c04 Mon Sep 17 00:00:00 2001
From: Yugo Nagata <nagata@sraoss.co.jp>
Date: Thu, 26 Jan 2023 16:58:20 +0900
Subject: [PATCH] Fix to allow generate_sereis in FROM clause (#50)

Previously, it caused an error due to an ambiguous reference
at the maintenance time because generate_series is used internally.
This is fixed by using an alias name for the internal genearet_series.
---
 matview.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/matview.c b/matview.c
index 650d27a..6e4208f 100644
--- a/matview.c
+++ b/matview.c
@@ -2347,7 +2347,7 @@ apply_new_delta(const char *matviewname, const char *deltaname_new,
 	initStringInfo(&querybuf);
 	appendStringInfo(&querybuf,
 					"INSERT INTO %s (%s) SELECT %s FROM ("
-						"SELECT diff.*, generate_series(1, diff.\"__ivm_count__\") "
+						"SELECT diff.*, generate_series(1, diff.\"__ivm_count__\") AS __ivm_generate_series__ "
 						"FROM %s AS diff) AS v",
 					matviewname, target_list->data, target_list->data,
 					deltaname_new);