From 1372de6f4344fa89a4ef823a65110f55a899a829 Mon Sep 17 00:00:00 2001
From: Ruslan Talpa <ruslan.talpa@gmail.com>
Date: Tue, 28 Jun 2016 12:18:12 +0300
Subject: [PATCH] query simplification by @diogob

---
 src/PostgREST/QueryBuilder.hs | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/src/PostgREST/QueryBuilder.hs b/src/PostgREST/QueryBuilder.hs
index 37906635e..1b40ca893 100644
--- a/src/PostgREST/QueryBuilder.hs
+++ b/src/PostgREST/QueryBuilder.hs
@@ -212,15 +212,13 @@ callProc qi params selectQuery countQuery _ countTotal isSingle =
             SELECT
               {countResultF} AS total_result_set,
               pg_catalog.count(t) AS page_total,
-              case when pg_catalog.count(1) > 1
-            		then {bodyF}
-            	    else (
-            	    	select case when ((array_agg(row_to_json(t)))[1]->{_procName}) is not null
-            		    	then ((array_agg(row_to_json(t)))[1]->{_procName})::character varying
-            		    	else {bodyF}
-            		    end
-            	    )
-            	end as body
+              case 
+                when pg_catalog.count(1) > 1 then 
+                  {bodyF}
+                else
+                  coalesce(((array_agg(row_to_json(t)))[1]->{_procName})::character varying, {bodyF})
+
+              end as body
             FROM ({selectQuery}) t;
           |]
           -- FROM (select * from {sourceCTEName} {limitF range}) t;