Paul Holden
ea45aefe62
When applying callbacks during the group concatenation aggregation types, ensure the column type is preserved for it's default value.
96 lines
2.7 KiB
PHP
96 lines
2.7 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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declare(strict_types=1);
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namespace core_reportbuilder\local\aggregation;
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use lang_string;
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use core_reportbuilder\local\report\column;
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/**
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* Column count distinct aggregation type
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*
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* @package core_reportbuilder
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* @copyright 2021 Paul Holden <paulh@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class countdistinct extends base {
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/**
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* Return aggregation name
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*
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* @return lang_string
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*/
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public static function get_name(): lang_string {
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return new lang_string('aggregationcountdistinct', 'core_reportbuilder');
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}
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/**
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* This aggregation can be performed on all column types
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*
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* @param int $columntype
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* @return bool
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*/
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public static function compatible(int $columntype): bool {
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return true;
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}
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/**
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* Override base method to ensure all SQL fields are concatenated together if there are multiple
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*
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* @param array $sqlfields
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* @return string
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*/
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public static function get_column_field_sql(array $sqlfields): string {
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if (count($sqlfields) === 1) {
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return parent::get_column_field_sql($sqlfields);
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}
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return self::get_column_fields_concat($sqlfields);
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}
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/**
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* Return the aggregated field SQL
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*
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* @param string $field
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* @param int $columntype
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* @return string
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*/
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public static function get_field_sql(string $field, int $columntype): string {
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global $DB;
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if ($columntype === column::TYPE_LONGTEXT && $DB->get_dbfamily() === 'oracle') {
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$field = $DB->sql_compare_text($field, 255);
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}
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return "COUNT(DISTINCT {$field})";
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}
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/**
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* Return formatted value for column when applying aggregation
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*
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* @param mixed $value
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* @param array $values
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* @param array $callbacks
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* @param int $columntype
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* @return int
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*/
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public static function format_value($value, array $values, array $callbacks, int $columntype): int {
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return (int) reset($values);
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}
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}
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