WITH bloat AS (
	WITH t1 AS (
		SELECT
			schemaname,
			tablename,
			( 23 + CEIL ( COUNT ( * ) >> 3 ) ) :: BIGINT nullheader,
			MAX ( null_frac ) nullfrac,
			CEIL ( SUM ( ( 1 - null_frac ) * avg_width ) ) :: BIGINT datawidth 
		FROM
			pg_stats 
			--where schemaname='form'
		GROUP BY
			schemaname,
			tablename 
		),
		t2 AS (
		SELECT
			schemaname,
			tablename,
			( datawidth + 8 - ( CASE WHEN datawidth % 8 = 0 THEN 8 ELSE datawidth % 8 END ) ) -- avg data len
			+ ( 1 - nullfrac ) * 24 + nullfrac * ( nullheader + 8 - ( CASE WHEN nullheader % 8 = 0 THEN 8 ELSE nullheader % 8 END ) ) avgtuplelen 
FROM
	t1 
	) SELECT C
	.oid,
	avgtuplelen
FROM
	t2 T,
	pg_class C,
	pg_namespace n 
WHERE
	T.schemaname = n.nspname 
	AND C.relname = T.tablename 
	AND C.relnamespace = n.oid 
	AND relpages > 100 
and c.relname in 
	(	select relname from (
select relname , reltuples::numeric as 记录数
from pg_class
where relkind = 'r'
)t order by 记录数 desc limit 50)
	),
	parti AS (
	SELECT
		parti.inhparent,
		parti.inhrelid,
		stat.n_dead_tup,
		c.relpages,
		c.reltuples
	FROM
		(
		SELECT
			inhparent,
			inhrelid
		FROM
			pg_inherits inh UNION ALL
			( SELECT b.inhparent AS grandpa, A.inhrelid me FROM pg_inherits A INNER JOIN pg_inherits b ON A.inhparent = b.inhrelid ) 
		) AS parti
		inner join pg_class c on parti.inhrelid = c.oid
		LEFT JOIN pg_stat_user_tables stat ON parti.inhrelid = stat.relid 
	 where  c.relname in 
	(	select relname from (
select relname , reltuples::numeric as 记录数
from pg_class
where relkind = 'r'
)t order by 记录数 desc limit 50)
	) SELECT
	 n.nspname "tableSchema",
	C.relname "tableName",
	'vacuum full '||C.relname||';' "sql",
	round(SUM ( pg_total_relation_size ( COALESCE ( parti1.inhrelid, C.oid ) )+0.0 )/1024/1024/1024,2) AS "表大小 GB", --表及其子分区、索引大小，包含索引
	round(
		SUM ( pg_total_relation_size ( COALESCE ( parti1.inhrelid, C.oid ) ) ) / ( SELECT SUM ( pg_database_size ( datname ) ) AS dbsize FROM pg_database ),
		4 
	) AS "占数据文件比例%",-- 表占数据文件比例	 
	to_char(COALESCE ( MAX ( c.reltuples ), 0 ) + COALESCE ( SUM ( COALESCE ( parti1.reltuples, 0 ) ), 0 ),'9999999999') AS "元组(记录行数)",
CASE
		WHEN (coalesce(max( bloat.avgtuplelen), 0) = 0  and coalesce(avg( parti1.avgtuplelen), 0) = 0) or  MAX ( COALESCE (c.relpages , 0 ) ) + SUM ( COALESCE ( parti1.relpages, 0 ))  = 0 THEN
		0 ELSE  
		round((1 - CEIL ( (MAX ( COALESCE ( c.reltuples, 0 ))  + SUM ( COALESCE ( parti1.reltuples, 0 ))) * 
		(case when max( parti1.avgtuplelen) is not null then AVG( parti1.avgtuplelen)  else max ( COALESCE ( bloat.avgtuplelen, 0 ) ) end  ) / 8168) / 
		(  MAX ( COALESCE (c.relpages , 0 ) ) + SUM ( COALESCE ( parti1.relpages, 0 )) ))::NUMERIC, 2)*100
	END AS "表膨胀率%",
	COALESCE ( MAX ( stat.n_dead_tup ), 0 ) + COALESCE ( SUM ( COALESCE ( parti1.n_dead_tup, 0 ) ), 0 ) AS "死元组(行)" --表内死数据行
FROM
	pg_class
	C INNER JOIN pg_namespace n ON C.relnamespace = n.oid
	LEFT JOIN pg_stat_user_tables stat ON C.oid = stat.relid
	LEFT JOIN (select p.*, b.* from parti p left join bloat as b  ON p.inhrelid = b.oid) as parti1 on c.oid = parti1.inhparent
	LEFT JOIN bloat ON C.oid = bloat.oid 
WHERE
	n.nspname NOT IN ( 'pg_catalog', 'information_schema' ) 
	AND n.nspname !~ '^pg_toast' 
	AND C.relkind IN ( 'r', 'p' ) 
	AND C.oid NOT IN ( SELECT inhrelid FROM pg_inherits ) 
	and c.relname in 
	(	select relname from (
select relname , reltuples::numeric as 记录数,
'truncate table '||relname||' ;'
from pg_class
where relkind = 'r'
)t order by 记录数 desc limit 50)
GROUP BY
	C.relname,
	n.nspname 
ORDER BY
--	"表大小 GB" DESC
"表膨胀率%" DESC
 limit 100
	

#!/bin/bash
#备份功能的话  记得 在 gkit 推送流水线的时候 要做逻辑分区 ，不要和当前的数据库用一个盘
# 备份文件目录
BKUP_DATADIR=/opt/srv/smartcare/hypergis/pg-data
# 日志文件目录
log_dir=/opt/srv/smartcare/hypergis/scripts
#备份日志
LOG_BK_FILE=${log_dir}/backupCtl_bk.log
LOG_FILE=${log_dir}/backupCtl.log
# 日志10M后要转储
MAX_LOGFILE_SIZE=10485760

# 写日志
function logMsg()
{
    echo "$1" >>  ${LOG_FILE}
}

# 清理日志文件,保留一个历史备份日志
function clearLogFile()
{
    logFileSize=$(ls -l ${LOG_FILE} | awk '{print $5}')
    if [[ ${logFileSize} -gt ${MAX_LOGFILE_SIZE} ]];then
       logMsg "`date '+%Y-%m-%d %H %M %S'`:log file is greater than ${MAX_LOGFILE_SIZE},backup it now"
       rm -rf ${LOG_BK_FILE}
       mv ${LOG_FILE} ${LOG_BK_FILE}
    fi

}

# 备份数据
function backupData()
{

logMsg "`date '+%Y-%m-%d %H %M %S'`:begin backup db"
local filename="datalinkbackup_`date '+%Y-%m-%d'`"
local backfile=${BKUP_DATADIR}'/'${filename}
docker exec $(docker ps |grep gis-postgresql:11.13|awk '{print $1}') sh -c 'source /opt/gis-postgresql/config/postgres_profile.sh && pg_dump --port 1523 --username datalink --no-password  -d datalink  --host 127.0.0.1 --format=c --blobs --encoding "UTF8" --verbose --file '${backfile}' &>> '${LOG_FILE}'' 
logMsg "`date '+%Y-%m-%d %H %M %S'`:end backup db"
}

#删除超过3天的备份文件
function clearFile()
{
    filePath=$1
    fileFlag=$2
logMsg "`date '+%Y-%m-%d %H %M %S'`:begin clearFile"
    cd ${filePath}
	local fileNum=$(ls -l |grep ${fileFlag}|wc -l)
	#Backup files are retained for 7 days.
	if [ ${fileNum} -ge 3 ];then
	  local deleteFile=$(ls -l |grep ${fileFlag} | awk -F ' ' '{print $9}'|awk 'NR==1{print}')
	  local time=$(stat -c %Y ${deleteFile})
	  for file in $(ls -l |grep  ${fileFlag} | awk -F ' ' '{print $9}')
	  do
		local fileCreatDate=$(stat -c %Y ${file})
		if [[ ${fileCreatDate} < ${time} ]];then
		  deleteFile=${file}
		fi
	  done
	  if [ -n "${deleteFile}" ];then
		#clear old data
		rm -rf ${deleteFile}
	  fi
	fi
	logMsg "`date '+%Y-%m-%d %H %M %S'`:end clearFile"
}


#backup
function backup_main()
{

#使用walsender进程判断是否主节点


primary_flag=`docker exec $(docker ps |grep gis-postgresql:11.13|awk '{print $1}') sh -c 'source /opt/gis-postgresql/config/postgres_profile.sh && pg_controldata -D /opt/srv/smartcare/hypergis/pg-data | grep "in production" |wc -l'`

   if [[ "${primary_flag}" -eq 1 ]] then
#清理备份日志
clearLogFile

logMsg "`date '+%Y-%m-%d %H %M %S'`:this is primary db"
#是主节点就备份数据
backupData ${BKUP_DATADIR}
#删除超过3天的备份文件
clearFile ${BKUP_DATADIR} "datalinkbackup"

else
echo "this is standby db don backup db"
fi
}

backup_main