我使用这些方式。
-
Postgres Functions（在 Postgres CLI 中）
postgres=# CREATE OR REPLACE FUNCTION getSize(tableName varchar) RETURNS varchar LANGUAGE SQL as
postgres-# $$
postgres$# SELECT pg_size_pretty(pg_relation_size(tableName));
postgres$# $$;
CREATE FUNCTION
postgres=# select getSize('test');
getsize
------------
8192 bytes
(1 row)
-
从 Shell（Postgres CLI 外部）
-
psqlgettablesize(schema, tablename) - 获取表格大小。传递all 作为架构参数以获取所有架构。
$ psqlgettablesize customer events
table_name | total_size | table_size | index_size
--------------------------+---------------------+-------------+---------------
test(complete database) | 19039892127 (18 GB) | |
--------- | --------- | --------- | ---------
customer.events | 24576 (24 kB) | 0 (0 bytes) | 24576 (24 kB)
(3 rows)
-
psqlgettablecount(schema, tablename) - 获取表中的行数，在模式中
$ psqlgettablecount customer events
count
----------
51850000
(1 row)
-
psqlgetvacuumdetails(schema, tablename) - 在模式中获取表的真空详细信息
$ psqlgetvacuumdetails customer events
schemaname | relname | n_live_tup | n_dead_tup | last_analyze | analyze_count | last_autoanalyze | autoanalyze_count | last_vacuum | vacuum_count | last_autovacuum | autovacuum_count
------------+-----------+------------+------------+----------------------------+---------------+----------------------------+-------------------+---------------------------+--------------+-----------------+------------------
customer | events | 0 | 0 | 2019-12-02 18:25:04.887653 | 2 | 2019-11-27 18:49:19.002405 | 1 | 2019-11-29 13:11:15.92002 | 1 | | 0
(1 row)
-
psqltruncatetable(schema, tablename) - 授权后截断架构中的表。
$ psqltruncatetable customer events
Are you sure to truncate table 'customer.events' (y/n)? y
Time: 4.944 ms
-
psqlsettings(category) - 获取 Postgres 的设置
$ psqlsettings Autovacuum
name | setting | unit | category | short_desc | extra_desc | context | vartype | source | min_val | max_val | enumvals | boot_val | reset_val | sourcefile | sourceline | pending_restart
-------------------------------------+-----------+------+------------+-------------------------------------------------------------------------------------------+------------+------------+---------+---------+---------+------------+----------+-----------+-----------+------------+------------+-----------------
autovacuum | on | | Autovacuum | Starts the autovacuum subprocess. | | sighup | bool | default | | | | on | on | | | f
autovacuum_analyze_scale_factor | 0.1 | | Autovacuum | Number of tuple inserts, updates, or deletes prior to analyze as a fraction of reltuples. | | sighup | real | default | 0 | 100 | | 0.1 | 0.1 | | | f
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psqlselectrows(schema, tablename) - 从表中获取行，在模式中
$ psqlselectrows customer events
id | name
----+------
1 | Clicked
2 | Page Loaded
(10 rows)
#Colors
B_BLACK='\033[1;30m'
B_RED='\033[1;31m'
B_GREEN='\033[1;32m'
B_YELLOW='\033[1;33m'
B_BLUE='\033[1;34m'
B_PURPLE='\033[1;35m'
B_CYAN='\033[1;36m'
B_WHITE='\033[1;37m'
RESET='\033[0m'
#Postgres Command With Params
psqlcommand="$POSTGRES_BIN/psql -U postgres test -q -c"
function psqlgettablesize()
{
[ -z "$1" ] && echo -e "${B_RED}Argument 1 missing. Schema name needed. ${B_YELLOW}(Pass 'all' to get details from all schema(s)${RESET}" ||
{
criteria="and table_schema = '$1'"
if [ "$1" == "all" ]; then
criteria=""
fi
if [ "$2" != "" ]; then
criteria+=" and table_name = '$2'"
fi
[ -z "$2" ] && echo -e "${B_YELLOW}Table name not given. ${B_GREEN}Showing size of all tables in $1 schema(s)${RESET}"
query="SELECT
concat(current_database(), '(complete database)') AS table_name, concat(pg_database_size(current_database()), ' (', pg_size_pretty(pg_database_size(current_database())), ')') AS total_size, '' AS table_size, '' AS index_size
UNION ALL SELECT '---------','---------','---------','---------'
UNION ALL SELECT
table_name,
concat(total_table_size, ' (', pg_size_pretty(total_table_size), ')'),
concat(table_size, ' (', pg_size_pretty(table_size), ')'),
concat(index_size, ' (', pg_size_pretty(index_size), ')')
FROM (
SELECT
concat(table_schema, '.', table_name) AS table_name,
pg_total_relation_size(concat(table_schema, '.', table_name)) AS total_table_size,
pg_relation_size(concat(table_schema, '.', table_name)) AS table_size,
pg_indexes_size(concat(table_schema, '.', table_name)) AS index_size
FROM information_schema.tables where table_schema !~ '^pg_' AND table_schema <> 'information_schema' $criteria ORDER BY total_table_size) AS sizes";
$psqlcommand "$query"
}
}
function psqlgettablecount()
{
[ -z "$1" ] && echo -e "${B_RED}Argument 1 missing: Need schema name${RESET}"
[ -z "$2" ] && echo -e "${B_RED}Argument 2 missing: Need table name${RESET}" ||
$psqlcommand "select count(*) from $1.$2;"
}
function psqlgetvacuumdetails()
{
[ -z "$1" ] && echo -e "${B_RED}Argument 1 missing: Need schema name${RESET}" ||
[ -z "$2" ] && echo -e "${B_RED}Argument 2 missing: Need table name${RESET}" ||
$psqlcommand "SELECT schemaname, relname, n_live_tup, n_dead_tup, last_analyze::timestamp, analyze_count, last_autoanalyze::timestamp, autoanalyze_count, last_vacuum::timestamp, vacuum_count, last_autovacuum::timestamp, autovacuum_count FROM pg_stat_user_tables where schemaname = '$1' and relname='$2';"
}
function psqltruncatetable()
{
[ -z "$1" ] && echo -e "${B_RED}Argument 1 missing: Need schema name${RESET}" ||
[ -z "$2" ] && echo -e "${B_RED}Argument 2 missing: Need table name${RESET}" ||
{
read -p "$(echo -e ${B_YELLOW}"Are you sure to truncate table '$1.$2' (y/n)? "${RESET})" choice
case "$choice" in
y|Y ) $psqlcommand "TRUNCATE $1.$2;";;
n|N ) echo -e "${B_GREEN}Table '$1.$2' not truncated${RESET}";;
* ) echo -e "${B_RED}Invalid option${RESET}";;
esac
}
}
function psqlsettings()
{
query="select * from pg_settings"
if [ "$1" != "" ]; then
query="$query where category like '%$1%'"
fi
query="$query ;"
$psqlcommand "$query"
if [ -z "$1" ]; then
echo -e "${B_YELLOW}Passing Category as first argument will filter the related settings.${RESET}"
fi
}
function psqlselectrows()
{
[ -z "$1" ] && echo -e "${B_RED}Argument 1 missing: Need schema name${RESET}" ||
[ -z "$2" ] && echo -e "${B_RED}Argument 2 missing: Need table name${RESET}" ||
$psqlcommand "SELECT * from $1.$2"
}