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Noor E Ilahi
164
database/migrations/2018_09_11_100952_add_index.php
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164
database/migrations/2018_09_11_100952_add_index.php
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<?php
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use Illuminate\Support\Facades\Schema;
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use Illuminate\Database\Schema\Blueprint;
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use Illuminate\Database\Migrations\Migration;
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class AddIndex extends Migration
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{
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/**
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* Run the migrations.
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*
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* @return void
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*/
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public function up()
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{
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Schema::table('time_intervals', function (Blueprint $table) {
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$table->index('start_at');
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$table->index('end_at');
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$table->index(['end_at', 'start_at']);
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});
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DB::unprepared('CREATE OR REPLACE VIEW `time_durations` AS SELECT DATE(`start_at`) AS `date`, SUM(TIME_TO_SEC(TIMEDIFF(`end_at`, `start_at`))) AS `duration`, `user_id` FROM `time_intervals` GROUP BY `date`,`user_id` ');
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Schema::create('time_durations_cache', function (Blueprint $table) {
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$table->increments('id');
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$table->date('date');
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$table->integer('duration')->unsigned();
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$table->integer('user_id')->unsigned();
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$table->foreign('user_id')->references('id')->on('users');
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});
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DB::unprepared('CREATE TRIGGER `time_durations_cache_insert_trigger` AFTER INSERT ON `time_intervals`
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FOR EACH ROW
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BEGIN
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DECLARE `interval` INT UNSIGNED;
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DECLARE `current_date` DATE;
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SET
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`interval` = TIME_TO_SEC(TIMEDIFF(NEW.`end_at`, NEW.`start_at`)),
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`current_date` = DATE(NEW.`start_at`);
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IF (
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SELECT 1
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FROM `time_durations_cache`
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WHERE
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`time_durations_cache`.`date` = `current_date`
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AND
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`time_durations_cache`.`user_id` = NEW.`user_id`
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) = 1
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THEN
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UPDATE `time_durations_cache`
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SET `duration` = `duration` + `interval`
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WHERE `date` = `current_date`;
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ELSE
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INSERT INTO `time_durations_cache` (`date`, `duration`, `user_id`)
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VALUES (`current_date`, `interval`, NEW.`user_id`);
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END IF;
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END'
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);
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DB::unprepared('CREATE TRIGGER `time_durations_cache_update_trigger` AFTER UPDATE ON `time_intervals`
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FOR EACH ROW
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BEGIN
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DECLARE `new_interval` INT UNSIGNED;
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DECLARE `old_interval` INT UNSIGNED;
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DECLARE `old_date` DATE;
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DECLARE `new_date` DATE;
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SET
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`new_interval` = TIME_TO_SEC(TIMEDIFF(NEW.`end_at`, NEW.`start_at`)),
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`old_interval` = TIME_TO_SEC(TIMEDIFF(OLD.`end_at`, OLD.`start_at`)),
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`new_date` = DATE(NEW.`start_at`),
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`old_date` = DATE(OLD.`start_at`);
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UPDATE `time_durations_cache`
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SET
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`duration` = `duration` - `old_interval`
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WHERE
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`date` = `old_date`
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AND
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`user_id` = OLD.`user_id`;
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IF (
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SELECT 1
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FROM `time_durations_cache`
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WHERE
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`time_durations_cache`.`date` = `new_date`
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AND
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`time_durations_cache`.`user_id` = NEW.`user_id`
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) = 1
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THEN
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UPDATE `time_durations_cache`
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SET `duration` = `duration` + `new_interval`
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WHERE
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`date` = `new_date`
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AND
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`time_durations_cache`.`user_id` = NEW.`user_id`;
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ELSE
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INSERT INTO `time_durations_cache` (`date`, `duration`, `user_id`)
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VALUES (`new_date`, `new_interval`, NEW.`user_id`);
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END IF;
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END'
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);
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DB::unprepared('CREATE TRIGGER `time_durations_cache_delete_trigger` AFTER DELETE ON `time_intervals`
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FOR EACH ROW
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BEGIN
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DECLARE `interval` INT UNSIGNED;
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DECLARE `current_date` DATE;
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SET
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`interval` = TIME_TO_SEC(TIMEDIFF(OLD.`end_at`, OLD.`start_at`)),
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`current_date` = DATE(OLD.`start_at`);
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UPDATE `time_durations_cache`
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SET `duration` = `duration` - `interval`
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WHERE `date` = `current_date`;
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END'
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);
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DB::unprepared('DROP PROCEDURE IF EXISTS `time_durations_cache_refresh`;');
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DB::unprepared('CREATE PROCEDURE `time_durations_cache_refresh` ()
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BEGIN
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DELETE FROM `time_durations_cache`;
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INSERT INTO `time_durations_cache` (`date`, `duration`, `user_id`)
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SELECT
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`time_durations`.`date`,
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`time_durations`.`duration`,
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`time_durations`.`user_id`
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FROM `time_durations`;
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END
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');
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}
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/**
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* Reverse the migrations.
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*
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* @return void
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*/
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public function down()
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{
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DB::unprepared( 'DROP TRIGGER IF EXISTS `time_durations_cache_insert_trigger`' );
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DB::unprepared( 'DROP TRIGGER IF EXISTS `time_durations_cache_update_trigger`' );
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DB::unprepared( 'DROP TRIGGER IF EXISTS `time_durations_cache_delete_trigger`' );
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DB::unprepared( 'DROP PROCEDURE IF EXISTS `time_durations_cache_refresh`' );
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Schema::dropIfExists('time_durations_cache');
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DB::unprepared( 'DROP VIEW IF EXISTS `time_durations`' );
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Schema::table('time_intervals', function (Blueprint $table) {
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$table->dropIndex('time_intervals_start_at_index');
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$table->dropIndex('time_intervals_end_at_index');
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$table->dropIndex('time_intervals_end_at_start_at_index');
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});
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}
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}
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