Fixed pg_stat_statements metric for case when track_io_timing is off

Author: dementii-priadko

config/pgwatch-prometheus/metrics.yml

@@ -858,7 +858,7 @@ metrics:
           select
             pg_get_userbyid(userid) as user,
             pg_database.datname,
-            pg_stat_statements.queryid ,
+            pg_stat_statements.queryid,
             pg_stat_statements.plans as plans_total,
             pg_stat_statements.calls,
             pg_stat_statements.total_exec_time as exec_time_total,
@@ -868,8 +868,14 @@ metrics:
             (current_setting('block_size')::int * pg_stat_statements.shared_blks_read) as shared_bytes_read_total,
             (current_setting('block_size')::int * pg_stat_statements.shared_blks_dirtied) as shared_bytes_dirtied_total,
             (current_setting('block_size')::int * pg_stat_statements.shared_blks_written) as shared_bytes_written_total,
-            pg_stat_statements.blk_read_time as block_read_total,
-            pg_stat_statements.blk_write_time as block_write_total,
+            CASE WHEN current_setting('track_io_timing') = 'on' 
+              THEN pg_stat_statements.blk_read_time 
+              ELSE NULL 
+            END as block_read_total,
+            CASE WHEN current_setting('track_io_timing') = 'on' 
+              THEN pg_stat_statements.blk_write_time 
+              ELSE NULL 
+            END as block_write_total,
             pg_stat_statements.wal_records,
             pg_stat_statements.wal_fpi,
             pg_stat_statements.wal_bytes,
@@ -893,8 +899,8 @@ metrics:
           shared_bytes_read_total::int8 as shared_bytes_read_total,
           shared_bytes_dirtied_total::int8 as shared_bytes_dirtied_total,
           shared_bytes_written_total::int8 as shared_bytes_written_total,
-          block_read_total::int8 as block_read_total,
-          block_write_total::int8 as block_write_total,
+          COALESCE(block_read_total::int8, 0) as block_read_total,
+          COALESCE(block_write_total::int8, 0) as block_write_total,
           wal_records::int8 as wal_records,
           wal_fpi::int8 as wal_fpi,
           wal_bytes::int8 as wal_bytes,
@@ -906,7 +912,7 @@ metrics:
           select
             pg_get_userbyid(userid) as user,
             pg_database.datname,
-            pg_stat_statements.queryid ,
+            pg_stat_statements.queryid,
             pg_stat_statements.plans as plans_total,
             pg_stat_statements.calls,
             pg_stat_statements.total_exec_time as exec_time_total,
@@ -916,8 +922,14 @@ metrics:
             (current_setting('block_size')::int * pg_stat_statements.shared_blks_read) as shared_bytes_read_total,
             (current_setting('block_size')::int * pg_stat_statements.shared_blks_dirtied) as shared_bytes_dirtied_total,
             (current_setting('block_size')::int * pg_stat_statements.shared_blks_written) as shared_bytes_written_total,
-            pg_stat_statements.shared_blk_read_time as block_read_total,
-            pg_stat_statements.shared_blk_write_time as block_write_total,
+            CASE WHEN current_setting('track_io_timing') = 'on' 
+              THEN pg_stat_statements.shared_blk_read_time 
+              ELSE NULL 
+            END as block_read_total,
+            CASE WHEN current_setting('track_io_timing') = 'on' 
+              THEN pg_stat_statements.shared_blk_write_time 
+              ELSE NULL 
+            END as block_write_total,
             pg_stat_statements.wal_records,
             pg_stat_statements.wal_fpi,
             pg_stat_statements.wal_bytes,
@@ -941,8 +953,8 @@ metrics:
           shared_bytes_read_total::int8 as shared_bytes_read_total,
           shared_bytes_dirtied_total::int8 as shared_bytes_dirtied_total,
           shared_bytes_written_total::int8 as shared_bytes_written_total,
-          block_read_total::int8 as block_read_total,
-          block_write_total::int8 as block_write_total,
+          COALESCE(block_read_total::int8, 0) as block_read_total,
+          COALESCE(block_write_total::int8, 0) as block_write_total,
           wal_records::int8 as wal_records,
           wal_fpi::int8 as wal_fpi,
           wal_bytes::int8 as wal_bytes,