From: Andrew Dunstan <andrew@dunslane.net>
Date: Thu, 17 Oct 2013 15:09:55 +0000 (-0400)
Subject: Return valid json when converting an empty hstore.
X-Git-Tag: REL9_3_2~72
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=bfb327ac1d9a55fe0cd83fa96d4ba471dd30efaf;p=postgresql

Return valid json when converting an empty hstore.

Oskari Saarenmaa.
---

diff --git a/contrib/hstore/hstore_io.c b/contrib/hstore/hstore_io.c
index d3e67dd5d0..772a5ca5d5 100644
--- a/contrib/hstore/hstore_io.c
+++ b/contrib/hstore/hstore_io.c
@@ -1240,11 +1240,7 @@ hstore_to_json_loose(PG_FUNCTION_ARGS)
 				dst;
 
 	if (count == 0)
-	{
-		out = palloc(1);
-		*out = '\0';
-		PG_RETURN_TEXT_P(cstring_to_text(out));
-	}
+		PG_RETURN_TEXT_P(cstring_to_text_with_len("{}",2));
 
 	buflen = 3;
 
@@ -1369,11 +1365,7 @@ hstore_to_json(PG_FUNCTION_ARGS)
 				dst;
 
 	if (count == 0)
-	{
-		out = palloc(1);
-		*out = '\0';
-		PG_RETURN_TEXT_P(cstring_to_text(out));
-	}
+		PG_RETURN_TEXT_P(cstring_to_text_with_len("{}",2));
 
 	buflen = 3;