Better checks for the bloat check.

diff --git a/check_postgres.pl b/check_postgres.pl
index 243f5d047362e94c4a82a32f5377ff535484b82f..db65bea93ac111193003f484040d40aa76eb32be 100755 (executable)
--- a/check_postgres.pl
+++ b/check_postgres.pl
@@ -2786,12 +2786,12 @@ sub check_bloat {
     $SQL = q{
 SELECT
   current_database() AS db, schemaname, tablename, reltuples::bigint AS tups, relpages::bigint AS pages, otta,
-  ROUND(CASE WHEN otta=0 THEN 0.0 ELSE sml.relpages/otta::numeric END,1) AS tbloat,
+  ROUND(CASE WHEN otta=0 OR sml.relpages=0 OR sml.relpages=otta THEN 0.0 ELSE sml.relpages/otta::numeric END,1) AS tbloat,
   CASE WHEN relpages < otta THEN 0 ELSE relpages::bigint - otta END AS wastedpages,
   CASE WHEN relpages < otta THEN 0 ELSE bs*(sml.relpages-otta)::bigint END AS wastedbytes,
   CASE WHEN relpages < otta THEN '0 bytes'::text ELSE (bs*(relpages-otta))::bigint || ' bytes' END AS wastedsize,
   iname, ituples::bigint AS itups, ipages::bigint AS ipages, iotta,
-  ROUND(CASE WHEN iotta=0 OR ipages=0 THEN 0.0 ELSE ipages/iotta::numeric END,1) AS ibloat,
+  ROUND(CASE WHEN iotta=0 OR ipages=0 OR ipages=iotta THEN 0.0 ELSE ipages/iotta::numeric END,1) AS ibloat,
   CASE WHEN ipages < iotta THEN 0 ELSE ipages::bigint - iotta END AS wastedipages,
   CASE WHEN ipages < iotta THEN 0 ELSE bs*(ipages-iotta) END AS wastedibytes,
   CASE WHEN ipages < iotta THEN '0 bytes' ELSE (bs*(ipages-iotta))::bigint || ' bytes' END AS wastedisize