more useful log output with row count for each table

helper_scripts/db_backup.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-# greate postgres backup and status log
+# postgres backup and log management
 
 time_stamp=$(date '+%Y%m%d')
 time_date=$(date '+%Y%m%d_%H%M%S')
@@ -9,16 +9,23 @@ backup_dir="$HOME/backup"
 docker exec postgres pg_dump -U aqi | gzip > "$backup_dir/pg_$time_stamp.gz"
 
 # log
-log_file="$backup_dir/pg_status_$time_stamp.log"
+log_file="$backup_dir/pg_status.log"
 
-query="SELECT schemaname AS table_schema, \
+query1="SELECT schemaname AS table_schema, \
        relname AS table_name, \
        pg_size_pretty(pg_relation_size(relid)) AS data_size \
 FROM pg_catalog.pg_statio_user_tables \
 ORDER BY pg_relation_size(relid) DESC;"
 
+query2="SELECT schemaname,relname,n_live_tup \
+       FROM pg_stat_user_tables \
+       ORDER BY n_live_tup DESC;"
+
 echo "postgres dump run at $time_date" > "$log_file"
-docker exec postgres psql -U aqi -c "$query" >> "$log_file"
+echo "table size" >> "$log_file"
+docker exec postgres psql -U aqi -c "$query1" >> "$log_file"
+echo "row count" >> "$log_file"
+docker exec postgres psql -U aqi -c "$query2" >> "$log_file"
 
 ##
 exit 0