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Línea 63... Línea 63...
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    public static function get_field_sql(string $field, int $columntype): string {
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    public static function get_field_sql(string $field, int $columntype): string {
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        return "AVG(1.0 * {$field})";
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        return "AVG(1.0 * {$field})";
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    }
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    }
Línea 66... Línea 66...
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    /**
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     * Returns aggregated column type
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     *
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     * @param int $columntype
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     * @return int
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     */
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    public static function get_column_type(int $columntype): int {
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        return column::TYPE_FLOAT;
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    }
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    /**
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    /**
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     * Return formatted value for column when applying aggregation
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     * Return formatted value for column when applying aggregation
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     *
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     *
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     * For boolean columns we return the average of the values (0..1), numeric columns execute original callbacks if present
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     * For boolean columns we return the average of the values (0..1), numeric columns execute original callbacks if present
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     *
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     *
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     * @param mixed $value
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     * @param mixed $value
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     * @param array $values
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     * @param array $values
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     * @param array $callbacks
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     * @param array $callbacks
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     * @param int $columntype
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     * @param int $columntype
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     * @return mixed
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     * @return mixed
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     */
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     */
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    public static function format_value($value, array $values, array $callbacks, int $columntype) {
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    public function format_value($value, array $values, array $callbacks, int $columntype) {
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        if (reset($values) === null) {
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        if (reset($values) === null) {
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            return null;
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            return null;
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        }
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        }
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        if ($columntype === column::TYPE_BOOLEAN || empty($callbacks)) {
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        if ($columntype === column::TYPE_BOOLEAN || empty($callbacks)) {