tistaharahap

$ pip install -r requirements.txt
Collecting python-handler-socket (from -r deps (line 1))
  Downloading python-handler-socket-0.2.4.tar.gz
Building wheels for collected packages: python-handler-socket
  Running setup.py bdist_wheel for python-handler-socket ... done
  Stored in directory: /Users/tista/Library/Caches/pip/wheels/48/7c/46/ee1c1e3dabc22527c8780ac7ae3ca7ba03a66e6720d5d1f481
Successfully built python-handler-socket
Installing collected packages: python-handler-socket
Successfully installed python-handler-socket-0.2.4

tistaharahap

python-handler-socket

tistaharahap

CREATE TABLE user (
  user_id INT UNSIGNED PRIMARY KEY,
  user_name VARCHAR(50),
  user_email VARCHAR(255),
  created DATETIME 
) ENGINE=InnoDB; 

tistaharahap

It may not seem like it, but there’s a lot of information packed into those 10 columns! The columns returned by the query are:

id – a sequential identifier for each SELECT within the query (for when you have nested subqueries)
select_type – the type of SELECT query. Possible values are:
  SIMPLE – the query is a simple SELECT query without any subqueries or UNIONs
  PRIMARY – the SELECT is in the outermost query in a JOIN
  DERIVED – the SELECT is part of a subquery within a FROM clause
  SUBQUERY – the first SELECT in a subquery
  DEPENDENT SUBQUERY – a subquery which is dependent upon on outer query
  UNCACHEABLE SUBQUERY – a subquery which is not cacheable (there are certain conditions for a query to be cacheable)

tistaharahap

MariaDB [fun]> EXPLAIN SELECT * FROM users WHERE first_name = 'Martin' AND last_name = 'David';
+------+-------------+-------+------+----------------------+----------------------+---------+-------------+------+--------------------------+
| id   | select_type | table | type | possible_keys        | key                  | key_len | ref         | rows | Extra                    |
+------+-------------+-------+------+----------------------+----------------------+---------+-------------+------+--------------------------+
|    1 | SIMPLE      | users | ref  | first_and_last_names | first_and_last_names | 106     | const,const |    1 | Using where; Using index |
+------+-------------+-------+------+----------------------+----------------------+---------+-------------+------+--------------------------+
1 row in set (0.00 sec)

tistaharahap

MariaDB [fun]> CREATE INDEX first_and_last_names ON users (first_name, last_name);
Query OK, 0 rows affected (0.01 sec)
Records: 0  Duplicates: 0  Warnings: 0

tistaharahap

MariaDB [fun]> EXPLAIN SELECT * FROM users WHERE first_name = 'Martin' AND last_name = 'David';
+------+-------------+-------+------+---------------+------+---------+------+------+-------------+
| id   | select_type | table | type | possible_keys | key  | key_len | ref  | rows | Extra       |
+------+-------------+-------+------+---------------+------+---------+------+------+-------------+
|    1 | SIMPLE      | users | ALL  | NULL          | NULL | NULL    | NULL |   10 | Using where |
+------+-------------+-------+------+---------------+------+---------+------+------+-------------+
1 row in set (0.00 sec)

tistaharahap

MariaDB [fun]> SELECT * FROM names WHERE first_name = 'Martin' AND last_name = 'David';
+----+------------+-----------+
| id | first_name | last_name |
+----+------------+-----------+
| 10 | Martin     | David     |
+----+------------+-----------+
1 row in set (0.01 sec)

tistaharahap

MariaDB [fun]> SELECT * FROM names;
+----+------------+------------+
| id | first_name | last_name  |
+----+------------+------------+
|  1 | Batista    | Harahap    |
|  2 | Rinto      | Harahap    |
|  3 | Michael    | Jordan     |
|  4 | Chris      | Martin     |
|  5 | Jordan     | Sparks     |
|  6 | Daniel     | Craig      |

tistaharahap

$ python cythondemo.py
Elapsed Time: 3.86 second
Ops/second:   25903031.00