author | Oleksandr Gavenko <gavenkoa@gmail.com> |
Thu, 03 Jan 2019 19:36:18 +0200 | |
changeset 2330 | 03d20db65d79 |
parent 2329 | 738316fb865f |
child 2331 | 32dd4ce8e9b2 |
permissions | -rw-r--r-- |
1683 | 1 |
.. -*- coding: utf-8; -*- |
2 |
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========== |
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4 |
Postgres |
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========== |
6 |
.. contents:: |
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7 |
:local: |
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9 |
Installing on Debian |
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10 |
==================== |
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12 |
Install and create new user and database:: |
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13 |
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14 |
$ sudo apt-get install postgresql postgresql-client |
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15 |
$ sudo su - postgres |
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% psql |
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postgres=# CREATE USER myuser WITH PASSWORD 'mypass'; |
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postgres=# CREATE DATABASE mydb OWNER myuser; |
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postgres=# \q |
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Connect as user ``mypguser`` to new database:: |
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$ su - mypguser |
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$ psql mypgdatabase |
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In order to create local host superuser:: |
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Create local host superuser.
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parents:
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27 |
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Create local host superuser.
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28 |
$ sudo su - postgres |
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$ createuser --superuser USER |
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Create local host superuser.
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$ exit |
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$ sudo -u USER psql |
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.. |
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35 |
https://wiki.debian.org/PostgreSql |
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Debian wiki instructions. |
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2319 | 38 |
Check version |
39 |
============= |
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40 |
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41 |
By SQL query:: |
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SELECT version(); |
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SHOW server_version; |
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SHOW server_version_num; |
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From executable:: |
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$ postgres -V |
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Check locations |
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=============== |
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:: |
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SHOW hba_file; |
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SHOW config_file; |
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Check settings |
59 |
============== |
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60 |
:: |
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SELECT name, setting FROM pg_settings; |
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Check extensions |
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================ |
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66 |
:: |
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67 |
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68 |
SELECT * FROM pg_available_extensions; |
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69 |
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Grant role options |
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Grant role options.
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================== |
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72 |
:: |
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73 |
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74 |
ALTER USER me WITH SUPERUSER; |
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ALTER USER me WITH CREATEDB CREATEROLE LOGIN; |
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76 |
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https://www.postgresql.org/docs/current/sql-createrole.html |
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78 |
``CREATE ROLE``. |
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79 |
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80 |
Change password |
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81 |
=============== |
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82 |
:: |
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83 |
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84 |
ALTER USER me WITH PASSWORD 'PassWord'; |
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85 |
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List indexes/constraints.
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86 |
Monitor connections |
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87 |
=================== |
03d20db65d79
List indexes/constraints.
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88 |
:: |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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89 |
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List indexes/constraints.
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90 |
select * from pg_stat_activity; |
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91 |
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92 |
List databases, schemas and tables |
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93 |
================================== |
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To switch databases.
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parents:
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94 |
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To switch databases.
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parents:
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95 |
Default database is ``postgres``. |
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96 |
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Create local host superuser.
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97 |
To list databases and database locales:: |
1701
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To switch databases.
Oleksandr Gavenko <gavenkoa@gmail.com>
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98 |
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1702 | 99 |
$ psql -U pgadmin -l |
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101 |
or:: |
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102 |
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=> SELECT datname FROM pg_database WHERE datistemplate = false; |
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104 |
=> \l |
6163ba5907d4
To switch databases.
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105 |
|
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To switch databases.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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106 |
To switch databases:: |
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To switch databases.
Oleksandr Gavenko <gavenkoa@gmail.com>
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107 |
|
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To switch databases.
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108 |
=> \connect NAME |
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110 |
Schemas:: |
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111 |
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2328 | 112 |
\dn * |
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select schema_name from information_schema.schemata; |
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select nspname from pg_catalog.pg_namespace; |
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1684 | 115 |
|
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To switch databases.
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116 |
To list all tables in the current database:: |
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To switch databases.
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117 |
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2328 | 118 |
\dt |
119 |
SELECT table_schema, table_name FROM information_schema.tables ORDER BY table_schema, table_name; |
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120 |
|
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Export data. Load external SQL file. List schemas/indexes/etc.
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121 |
or in all schemas:: |
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122 |
|
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Export data. Load external SQL file. List schemas/indexes/etc.
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123 |
=> \dt *.* |
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Export data. Load external SQL file. List schemas/indexes/etc.
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124 |
|
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Export data. Load external SQL file. List schemas/indexes/etc.
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|
125 |
List views:: |
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126 |
|
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Export data. Load external SQL file. List schemas/indexes/etc.
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127 |
\dv |
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Export data. Load external SQL file. List schemas/indexes/etc.
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|
128 |
|
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129 |
List users:: |
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List users. Switch database.
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130 |
|
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131 |
\du |
2299 | 132 |
\du+ |
133 |
||
2300
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Oleksandr Gavenko <gavenkoa@gmail.com>
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|
134 |
List schemas:: |
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Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
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changeset
|
135 |
|
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Export data. Load external SQL file. List schemas/indexes/etc.
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|
136 |
\dn |
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|
137 |
|
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Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
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|
138 |
List indexes:: |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
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|
139 |
|
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Export data. Load external SQL file. List schemas/indexes/etc.
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|
140 |
\di |
2328 | 141 |
select * from pg_indexes; |
142 |
select * from pg_indexes where schemaname = '...'; |
|
143 |
select * from pg_indexes where schemaname = '...' and tablename = '...'; |
|
144 |
select * from pg_indexes where schemaname = '...' and indexname = '...'; |
|
2300
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
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|
145 |
|
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146 |
select |
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147 |
t.relname as table_name, |
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148 |
i.relname as index_name, |
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|
149 |
a.attname as column_name |
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150 |
from |
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151 |
pg_class t, |
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152 |
pg_class i, |
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153 |
pg_index ix, |
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154 |
pg_attribute a |
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155 |
where |
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156 |
t.oid = ix.indrelid |
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157 |
and i.oid = ix.indexrelid |
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|
158 |
and a.attrelid = t.oid |
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|
159 |
and a.attnum = ANY(ix.indkey) |
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|
160 |
and t.relkind = 'r' |
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|
161 |
and t.relname like 'test%' |
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|
162 |
order by |
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|
163 |
t.relname, |
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|
164 |
i.relname; |
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|
165 |
|
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|
166 |
select |
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|
167 |
t.relname as table_name, |
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|
168 |
i.relname as index_name, |
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|
169 |
array_to_string(array_agg(a.attname), ', ') as column_names |
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170 |
from |
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|
171 |
pg_class t, |
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172 |
pg_class i, |
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|
173 |
pg_index ix, |
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|
174 |
pg_attribute a |
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|
175 |
where |
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|
176 |
t.oid = ix.indrelid |
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|
177 |
and i.oid = ix.indexrelid |
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|
178 |
and a.attrelid = t.oid |
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|
179 |
and a.attnum = ANY(ix.indkey) |
738316fb865f
Grant role options.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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changeset
|
180 |
and t.relkind = 'r' |
738316fb865f
Grant role options.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
181 |
and t.relname like 'test%' |
738316fb865f
Grant role options.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
182 |
group by |
738316fb865f
Grant role options.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
183 |
t.relname, |
738316fb865f
Grant role options.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2328
diff
changeset
|
184 |
i.relname |
738316fb865f
Grant role options.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2328
diff
changeset
|
185 |
order by |
738316fb865f
Grant role options.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2328
diff
changeset
|
186 |
t.relname, |
738316fb865f
Grant role options.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
187 |
i.relname; |
738316fb865f
Grant role options.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
188 |
|
2330
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
189 |
List index usage:: |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
190 |
|
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
191 |
SELECT * FROM pg_stat_all_indexes; |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
192 |
SELECT * FROM pg_stat_all_tables; |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
193 |
SELECT * FROM pg_stat_user_indexes; |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
194 |
SELECT * FROM pg_stat_user_tables; |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
195 |
|
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
196 |
List constraints:: |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
197 |
|
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
198 |
SELECT * FROM pg_constraint; |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
199 |
SELECT * FROM pg_constraint WHERE conrelid = (SELECT oid FROM pg_class WHERE relname LIKE 'tblName'); |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
200 |
|
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
201 |
https://www.postgresql.org/docs/current/catalog-pg-constraint.html |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
202 |
pg_constraint. |
03d20db65d79
List indexes/constraints.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2329
diff
changeset
|
203 |
|
2300
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
204 |
List functions:: |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
205 |
|
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
206 |
\df |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
207 |
|
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
208 |
List triggers:: |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
209 |
|
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
210 |
\dy |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
211 |
|
2299 | 212 |
List misc info:: |
213 |
||
214 |
select current_database(); |
|
215 |
select current_schema(); |
|
216 |
select current_user; |
|
217 |
select session_user; |
|
218 |
select current_date; |
|
219 |
select version(); |
|
220 |
||
221 |
https://www.postgresql.org/docs/current/functions-info.html |
|
222 |
System Information Functions. |
|
2298
34ffcffdc8df
List users. Switch database.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
223 |
|
1703
a85cc266dbdf
Set default schema.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1702
diff
changeset
|
224 |
Set default schema. |
a85cc266dbdf
Set default schema.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1702
diff
changeset
|
225 |
=================== |
a85cc266dbdf
Set default schema.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1702
diff
changeset
|
226 |
:: |
a85cc266dbdf
Set default schema.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1702
diff
changeset
|
227 |
|
a85cc266dbdf
Set default schema.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1702
diff
changeset
|
228 |
set search_path to NAME; |
2298
34ffcffdc8df
List users. Switch database.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
229 |
set schema 'NAME'; |
1703
a85cc266dbdf
Set default schema.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1702
diff
changeset
|
230 |
|
2298
34ffcffdc8df
List users. Switch database.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
231 |
Database, table, index size |
34ffcffdc8df
List users. Switch database.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
232 |
=========================== |
1710
601c31753686
Database, table, index size.
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parents:
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diff
changeset
|
233 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
234 |
Database size:: |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
235 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1709
diff
changeset
|
236 |
SELECT pg_database_size('geekdb'); -- in bytes |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
237 |
SELECT pg_size_pretty(pg_database_size('dbname')); |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
238 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
239 |
List of databases sizes:: |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
240 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
241 |
\l+ |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
242 |
|
1711 | 243 |
List tables sizes:: |
244 |
||
245 |
\d+ |
|
246 |
||
1710
601c31753686
Database, table, index size.
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parents:
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|
247 |
Table total size (with indexes):: |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
248 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
249 |
SELECT pg_size_pretty(pg_total_relation_size('schemaname.tablename')); |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
250 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
251 |
Sole table size (without indexes and other):: |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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changeset
|
252 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
253 |
SELECT pg_size_pretty(pg_relation_size('schemaname.tablename')); |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
254 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
255 |
Largest table in the PostgreSQL database:: |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
256 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
257 |
SELECT relname, relpages FROM pg_class ORDER BY relpages DESC; |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
258 |
|
2327
24ffd84a171c
MVCC and transaction id.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2326
diff
changeset
|
259 |
MVCC and transaction id |
24ffd84a171c
MVCC and transaction id.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2326
diff
changeset
|
260 |
======================= |
24ffd84a171c
MVCC and transaction id.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2326
diff
changeset
|
261 |
|
24ffd84a171c
MVCC and transaction id.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2326
diff
changeset
|
262 |
As being MVCC Postgres doesn't delete or update existing rows. Row visibility is controled by |
24ffd84a171c
MVCC and transaction id.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2326
diff
changeset
|
263 |
transaction id (monotonous incremented number): ``xmin`` - first transaction that can see row, |
24ffd84a171c
MVCC and transaction id.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2326
diff
changeset
|
264 |
``xmax`` - last transaction that can see row::: |
24ffd84a171c
MVCC and transaction id.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2326
diff
changeset
|
265 |
|
24ffd84a171c
MVCC and transaction id.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2326
diff
changeset
|
266 |
SELECT xmin, xmax, * FROM foo WHERE id < 5 ORDER BY id; |
24ffd84a171c
MVCC and transaction id.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2326
diff
changeset
|
267 |
|
2328 | 268 |
Vacuum |
269 |
====== |
|
270 |
||
271 |
Stats on vacuum oprtations per table:: |
|
272 |
||
273 |
select * from pg_stat_user_tables; |
|
274 |
||
2300
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
275 |
Using psql client |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
276 |
================= |
1700 | 277 |
|
278 |
Using password file ``~/.pgpass``:: |
|
279 |
||
280 |
# comment |
|
281 |
hostname:port:database:username:password |
|
282 |
hostname:port:*:username:password |
|
283 |
hostname:*:*:username:password |
|
284 |
||
285 |
Connect by:: |
|
286 |
||
287 |
$ psql -U $USER -h $HOST $SCHEMA |
|
288 |
||
1710
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
289 |
How to view execution plan:: |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
290 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
291 |
EXPLAIN query; |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
292 |
EXPLAIN ANALYZE query; |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
293 |
|
2300
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
294 |
Collect statistics:: |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
295 |
|
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
296 |
ANALYZE table; |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
297 |
|
1710
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
298 |
How to redirect the output of query to a file:: |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
299 |
|
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
300 |
\o output_file |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
301 |
SELECT * FROM pg_class; |
601c31753686
Database, table, index size.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
302 |
|
2298
34ffcffdc8df
List users. Switch database.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2297
diff
changeset
|
303 |
Switch database:: |
34ffcffdc8df
List users. Switch database.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2297
diff
changeset
|
304 |
|
34ffcffdc8df
List users. Switch database.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2297
diff
changeset
|
305 |
\connect DBNAME |
34ffcffdc8df
List users. Switch database.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2297
diff
changeset
|
306 |
\c DBNAME |
34ffcffdc8df
List users. Switch database.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2297
diff
changeset
|
307 |
|
2300
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
308 |
Load external SQL file:: |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
309 |
|
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
310 |
\i my.sql |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
311 |
|
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
312 |
Export data |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
313 |
=========== |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
314 |
|
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
315 |
Export from ``psql``:: |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
316 |
|
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
317 |
\copy (SELECT * FROM foo) TO '/tmp/my.csv' WITH CSV |
e538e158c38b
Export data. Load external SQL file. List schemas/indexes/etc.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
2299
diff
changeset
|
318 |
|
2305 | 319 |
Import data |
320 |
=========== |
|
321 |
||
322 |
Import CSV file:: |
|
323 |
||
324 |
\copy tbl_name from 'my.csv' csv; |
|
325 |
\copy tbl_name from 'my.csv' delimiter ':' csv; |
|
326 |
||
327 |
$ psql -U $USER -h $HOST $DB -c "\\copy tbl_name from 'my.csv' csv" |
|
328 |
||
2326 | 329 |
JDBC driver |
330 |
=========== |
|
331 |
||
332 |
https://jdbc.postgresql.org/about/about.html |
|
333 |
The current version of the driver should be compatible with PostgreSQL 8.2 and higher, and Java 6 |
|
334 |
(JDBC 4.0), Java 7 (JDBC 4.1), Java 8 (JDBC 4.2) and Java 9. |
|
335 |
https://jdbc.postgresql.org/download.html |
|
336 |
Java/JDBC/Postgres compatibility table. |
|
337 |