Fisharebest\Webtrees\DB\Drivers\MySQLDriver

Complexity

Total Complexity

3

Size/Duplication

Total Lines	60
Duplicated Lines	0 %

Importance

Changes	1
Bugs	0	Features	0

1 Method

Rating	Name	Duplication	Size	Complexity
A	introspectSchema()	0	58	3

<?php

/**
 * webtrees: online genealogy
 * Copyright (C) 2022 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

declare(strict_types=1);

namespace Fisharebest\Webtrees\DB\Drivers;

use Fisharebest\Webtrees\DB\Schema\Schema;

This use statement conflicts with another class in this namespace, Fisharebest\Webtrees\DB\Drivers\Schema. Consider defining an alias.

The type Fisharebest\Webtrees\DB\Schema\Schema was not found. Maybe you did not declare it correctly or list all dependencies?

use Fisharebest\Webtrees\DB\Schema\Column;
use Fisharebest\Webtrees\DB\Schema\Table;

use function array_filter;

/**
 * Driver for MySQL
 */
class MySQLDriver extends AbstractDriver implements DriverInterface
{
    public function introspectSchema(string $schema_name = null): Schema
    {
        $schema_name ?? $schema_name = $this->query('SELECT DATABASE() AS schema_name')[0]->schema_name;

        $pattern = $this->escapeLike($this->prefix) . '%';

        $sql =
            'SELECT    TABLE_NAME, ENGINE, AUTO_INCREMENT, TABLE_COLLATION' .
            ' FROM     INFORMATION_SCHEMA.TABLES' .
            ' WHERE    TABLE_TYPE   =    :table_type' .
            '   AND    TABLE_SCHEMA =    :table_schema' .
            '   AND    TABLE_NAME   LIKE :pattern' .
            ' ORDER BY TABLE_NAME';

        $table_rows = $this->query($sql, [
            'table_type'   => 'BASE TABLE',
            'pattern'      => $pattern,
            'table_schema' => $schema_name,
        ]);

        $sql =
            'SELECT    TABLE_NAME, COLUMN_NAME, ORDINAL_POSITION, COLUMN_DEFAULT, IS_NULLABLE, CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH, NUMERIC_PRECISION, NUMERIC_SCALE, DATETIME_PRECISION, CHARACTER_SET_NAME, COLLATION_NAME, COLUMN_TYPE, COLUMN_KEY, EXTRA, COLUMN_COMMENT, GENERATION_EXPRESSION, SRS_ID' .
            ' FROM     INFORMATION_SCHEMA.COLUMNS' .
            ' WHERE    TABLE_SCHEMA =    :table_schema' .
            '   AND    TABLE_NAME   LIKE :pattern' .
            ' ORDER BY ORDINAL_POSITION';

        $column_rows = $this->query($sql, ['pattern' => $pattern, 'table_schema' => $schema_name]);

        $sql =
            'SELECT TABLE_NAME, CONSTRAINT_NAME, CONSTRAINT_TYPE' .
            ' FROM  INFORMATION_SCHEMA.TABLE_CONSTRAINTS' .
            ' WHERE TABLE_SCHEMA =    :table_schema' .
            '   AND TABLE_NAME   LIKE :pattern';

        $table_constraints_rows = $this->query($sql, ['pattern' => $pattern, 'table_schema' => $schema_name]);

        $sql =
            'SELECT CONSTRAINT_NAME, TABLE_NAME, COLUMN_NAME, ORDINAL_POSITION, POSITION_IN_UNIQUE_CONSTRAINT,' .
            '       REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME' .
            ' FROM  INFORMATION_SCHEMA.KEY_COLUMN_USAGE' .
            ' WHERE TABLE_SCHEMA = :table_schema' .
            '   AND TABLE_NAME LIKE :pattern';

        $key_column_usage_rows = $this->query($sql, ['pattern' => $pattern, 'table_schema' => $schema_name]);

        foreach ($table_rows as $table_row) {
            $table = new Table($table_row->TABLE_NAME);

The assignment to $table is dead and can be removed.

            $this_column_rows = array_filter($column_rows, static fn (object $row): bool => $row->TABLE_NAME === $table_row->TABLE_NAME);

            foreach ($this_column_rows as $this_column_row) {
                $column = new Column($this_column_row->COLUMN_NAME, $this_column_row->COLUMN_TYPE, $this_column_row->COLUMN_DEFAULT);

The assignment to $column is dead and can be removed.

            }

        }

        var_dump($pattern, $schema_name, $table_rows, $column_rows, $table_constraints_rows, $key_column_usage_rows);exit;

Using exit here is not recommended.

var_dump($pattern, $schema_name, $table_rows, $column_rows, $table_constraints_rows, $key_column_usage_rows) looks like debug code. Are you sure you do not want to remove it?

    }
}