diff --git a/sample-config/pgmon-metrics.yml b/sample-config/pgmon-metrics.yml
index ac905be..67251db 100644
--- a/sample-config/pgmon-metrics.yml
+++ b/sample-config/pgmon-metrics.yml
@@ -98,20 +98,20 @@ metrics:
     query:
       160000: >
         SELECT backend_type,
-               COALESCE(SUM(reads * op_bytes), 0)::bigint AS reads,
-               COALESCE(SUM(read_time), 0)::bigint AS read_time,
-               COALESCE(SUM(writes * op_bytes), 0)::bigint AS writes,
-               COALESCE(SUM(write_time), 0)::bigint AS write_time,
-               COALESCE(SUM(writebacks * op_bytes), 0)::bigint AS writebacks,
-               COALESCE(SUM(writeback_time), 0)::bigint AS writeback_time,
-               COALESCE(SUM(extends * op_bytes), 0)::bigint AS extends,
-               COALESCE(SUM(extend_time), 0)::bigint AS extend_time,
-               COALESCE(SUM(op_bytes), 0)::bigint AS op_bytes,
-               COALESCE(SUM(hits), 0)::bigint AS hits,
-               COALESCE(SUM(evictions), 0)::bigint AS evictions,
-               COALESCE(SUM(reuses), 0)::bigint AS reuses,
-               COALESCE(SUM(fsyncs), 0)::bigint AS fsyncs,
-               COALESCE(SUM(fsync_time), 0)::bigint AS fsync_time
+               COALESCE(SUM(reads * op_bytes), 0) AS reads,
+               COALESCE(SUM(read_time), 0) AS read_time,
+               COALESCE(SUM(writes * op_bytes), 0) AS writes,
+               COALESCE(SUM(write_time), 0) AS write_time,
+               COALESCE(SUM(writebacks * op_bytes), 0) AS writebacks,
+               COALESCE(SUM(writeback_time), 0) AS writeback_time,
+               COALESCE(SUM(extends * op_bytes), 0) AS extends,
+               COALESCE(SUM(extend_time), 0) AS extend_time,
+               COALESCE(SUM(op_bytes), 0) AS op_bytes,
+               COALESCE(SUM(hits), 0) AS hits,
+               COALESCE(SUM(evictions), 0) AS evictions,
+               COALESCE(SUM(reuses), 0) AS reuses,
+               COALESCE(SUM(fsyncs), 0) AS fsyncs,
+               COALESCE(SUM(fsync_time), 0) AS fsync_time
         FROM pg_stat_io
         GROUP BY backend_type
 
@@ -147,7 +147,7 @@ metrics:
                NULL AS sessions_abandoned,
                NULL AS sessions_fatal,
                NULL AS sessions_killed,
-               extract('epoch' from stats_reset)::float AS stats_reset
+               extract('epoch' from stats_reset) AS stats_reset
         FROM pg_stat_database WHERE datname = %(dbname)s
       140000: >
         SELECT numbackends,
@@ -174,7 +174,7 @@ metrics:
                sessions_abandoned,
                sessions_fatal,
                sessions_killed,
-               extract('epoch' from stats_reset)::float AS stats_reset
+               extract('epoch' from stats_reset) AS stats_reset
         FROM pg_stat_database WHERE datname = %(dbname)s
     test_args:
       dbname: postgres
@@ -197,7 +197,7 @@ metrics:
       0: >
         SELECT state,
                count(*) AS backend_count,
-               COALESCE(EXTRACT(EPOCH FROM max(now() - state_change))::float, 0) AS max_state_time
+               COALESCE(EXTRACT(EPOCH FROM max(now() - state_change)) 0) AS max_state_time
         FROM pg_stat_activity
         WHERE datname = %(dbname)s
         GROUP BY state
@@ -226,7 +226,7 @@ metrics:
     type: row
     query:
       100000: >
-        SELECT COUNT(*) FILTER (WHERE has_sequence_privilege(c.oid, 'SELECT,USAGE'::text)) AS readable_sequences,
+        SELECT COUNT(*) FILTER (WHERE has_sequence_privilege(c.oid, 'SELECT,USAGE')) AS readable_sequences,
                COUNT(*) AS total_sequences
         FROM pg_class AS c
         WHERE relkind = 'S';
@@ -240,7 +240,7 @@ metrics:
     query:
       90400: >
         SELECT pid, usename,
-               EXTRACT(EPOCH FROM backend_start)::integer AS backend_start,
+               EXTRACT(EPOCH FROM backend_start) AS backend_start,
                state,
                pg_xlog_location_diff(pg_current_xlog_location(), sent_location) AS sent_lsn,
                pg_xlog_location_diff(pg_current_xlog_location(), write_location) AS write_lsn,
@@ -254,15 +254,15 @@ metrics:
         WHERE host(client_addr) || '_' || regexp_replace(application_name, '[ ,]', '_', 'g') = %(repid)s
       100000: >
         SELECT pid, usename,
-               EXTRACT(EPOCH FROM backend_start)::integer AS backend_start,
+               EXTRACT(EPOCH FROM backend_start) AS backend_start,
                state,
                pg_wal_lsn_diff(pg_current_wal_lsn(), sent_lsn) AS sent_lsn,
                pg_wal_lsn_diff(pg_current_wal_lsn(), write_lsn) AS write_lsn,
                pg_wal_lsn_diff(pg_current_wal_lsn(), flush_lsn) AS flush_lsn,
                pg_wal_lsn_diff(pg_current_wal_lsn(), replay_lsn) AS replay_lsn,
-               COALESCE(EXTRACT(EPOCH FROM write_lag), 0)::integer AS write_lag,
-               COALESCE(EXTRACT(EPOCH FROM flush_lag), 0)::integer AS flush_lag,
-               COALESCE(EXTRACT(EPOCH FROM replay_lag), 0)::integer AS replay_lag,
+               COALESCE(EXTRACT(EPOCH FROM write_lag), 0) AS write_lag,
+               COALESCE(EXTRACT(EPOCH FROM flush_lag), 0) AS flush_lag,
+               COALESCE(EXTRACT(EPOCH FROM replay_lag), 0) AS replay_lag,
                sync_state
         FROM pg_stat_replication
         WHERE host(client_addr) || '_' || regexp_replace(application_name, '[ ,]', '_', 'g') = %(repid)s
@@ -279,20 +279,20 @@ metrics:
       90400: >
         SELECT NULL as active_pid,
                xmin,
-               pg_xlog_location_diff(pg_current_xlog_location(), restart_lsn)::bigint AS restart_bytes,
+               pg_xlog_location_diff(pg_current_xlog_location(), restart_lsn) AS restart_bytes,
                NULL AS confirmed_flush_bytes
         FROM pg_replication_slots WHERE slot_name = %(slot)s
       90600: >
         SELECT active_pid,
                xmin,
-               pg_xlog_location_diff(pg_current_xlog_location(), restart_lsn)::bigint AS restart_bytes,
-               pg_xlog_location_diff(pg_current_xlog_location(), confirmed_flush_lsn)::bigint AS confirmed_flush_bytes
+               pg_xlog_location_diff(pg_current_xlog_location(), restart_lsn) AS restart_bytes,
+               pg_xlog_location_diff(pg_current_xlog_location(), confirmed_flush_lsn) AS confirmed_flush_bytes
         FROM pg_replication_slots WHERE slot_name = %(slot)s
       100000: >
         SELECT active_pid,
                xmin,
-               pg_wal_lsn_diff(pg_current_wal_lsn(), restart_lsn)::bigint AS restart_bytes,
-               pg_wal_lsn_diff(pg_current_wal_lsn(), confirmed_flush_lsn)::bigint AS confirmed_flush_bytes
+               pg_wal_lsn_diff(pg_current_wal_lsn(), restart_lsn) AS restart_bytes,
+               pg_wal_lsn_diff(pg_current_wal_lsn(), confirmed_flush_lsn) AS confirmed_flush_bytes
         FROM pg_replication_slots WHERE slot_name = %(slot)s
     test_args:
       slot: test_slot