Improving the SQL datasource query log

This recipe shows how to create a component that will offer extended logging of all queries executed on any SQL-based datasource that supports the EXPLAIN command (this recipe is designed to work with MySQL, but can be adapted to other SQL based datasources), and show that information when the appropriate debug setting is set.

Getting ready

To go through this recipe we need a sample table to work with. Create a table named accounts, using the following SQL statement:

CREATE TABLE `accounts`(
`id` INT UNSIGNED AUTO_INCREMENT NOT NULL,
`email` VARCHAR(255) NOT NULL,
PRIMARY KEY(`id`)
);

Create a table named profiles, using the following SQL statement:

CREATE TABLE `profiles`(
`id` INT UNSIGNED AUTO_INCREMENT NOT NULL,
`account_id` INT UNSIGNED NOT NULL,
`name` VARCHAR(255) default NULL,
PRIMARY KEY(`id`),
KEY `account_id`(`account_id`),
FOREIGN KEY `profiles__accounts`(`account_id`) REFERENCES `accounts`(`id`)
);

Add some sample data, using the following...