112 lines
3.3 KiB
Plaintext
112 lines
3.3 KiB
Plaintext
<?php
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/**
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* @file
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* Farm sensor listener install.
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*/
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/**
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* Implements hook_schema().
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*/
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function farm_sensor_listener_schema() {
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$schema['farm_sensor_data'] = array(
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'description' => 'Farm sensor data storage',
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'fields' => array(
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'id' => array(
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'description' => 'Farm sensor asset ID',
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'type' => 'int',
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'unsigned' => TRUE,
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'not null' => TRUE,
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'default' => 0,
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),
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'timestamp' => array(
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'description' => 'Timestamp of the sensor reading',
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'type' => 'int',
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'not null' => TRUE,
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'default' => 0,
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),
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'name' => array(
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'description' => 'Sensor reading name',
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'type' => 'varchar',
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'length' => '255',
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'not null' => FALSE,
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),
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'value_numerator' => array(
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'description' => 'Value numerator',
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'type' => 'int',
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'size' => 'big',
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'not null' => TRUE,
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'default' => 0,
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),
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'value_denominator' => array(
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'description' => 'Value denominator',
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'type' => 'int',
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'not null' => TRUE,
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'default' => 1,
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),
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),
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'indexes' => array(
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'id' => array('id'),
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'name' => array('name'),
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'timestamp' => array('timestamp'),
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),
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);
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return $schema;
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}
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/**
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* Do not allow null timestamp values in sensor data table.
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*/
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function farm_sensor_listener_update_7000(&$sandbox) {
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// Drop the index.
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db_drop_index('farm_sensor_data', 'timestamp');
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// Set all NULL values to 0.
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db_query('UPDATE {farm_sensor_data} SET timestamp = 0 WHERE timestamp IS NULL');
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// Change the field.
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$timestamp = array(
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'description' => 'Timestamp of the sensor reading',
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'type' => 'int',
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'not null' => TRUE,
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'default' => 0,
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);
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$timestamp_keys = array(
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'indexes' => array(
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'timestamp' => array('timestamp'),
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),
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);
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db_change_field('farm_sensor_data', 'timestamp', 'timestamp', $timestamp, $timestamp_keys);
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}
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/**
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* Alter sensor data schema to make denominator signed.
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*
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* This is done so the field is leveled between MySQL and Postgres and migration
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* is possible between the two. When an integer is unsigned in Postges, Drupal
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* will create a bigint for it, while with MySQL, it would create a regular int.
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*
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* @see https://www.drupal.org/project/fraction/issues/2729315
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*/
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function farm_sensor_listener_update_7001(&$sandbox) {
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// Max value on signed int for MySQL or int in PostgreSQL is 2147483648. If
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// the max value is bigger than the limits for MySQL/Postgres, warn the user.
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$max_denominator = db_query('SELECT MAX(value_denominator) FROM {farm_sensor_data}')->fetchField();
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if ($max_denominator >= 2147483648) {
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throw new DrupalUpdateException('Fraction works with signed integer schema fields for denominator, some of your values in the database exceed this limit, please check the farm_sensor_data table and review the data before running this update. See https://www.drupal.org/project/fraction/issues/2729315 for further details.');
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}
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// Alter schema to make denominator signed.
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db_change_field('farm_sensor_data', 'value_denominator', 'value_denominator', array(
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'description' => 'Fraction denominator value',
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'type' => 'int',
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'not null' => TRUE,
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'default' => 1,
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));
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// Return a message.
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return 'Sensor data table schema updated.';
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}
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