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1
1<?php
2
3/**
4 * PostgreSQL specific SQL dialect.
5 *
6 * This Source Code Form is subject to the terms of the Mozilla Public License,
7 * v. 2.0. If a copy of the MPL was not distributed with this file, You can
8 * obtain one at https://mozilla.org/MPL/2.0/.
9 *
10 * @package   phpMyFAQ
11 * @author    Thorsten Rinne <thorsten@phpmyfaq.de>
12 * @copyright 2023-2026 phpMyFAQ Team
13 * @license   https://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0
14 * @link      https://www.phpmyfaq.de
15 * @since     2026-01-25
16 */
17
18declare(strict_types=1);
19
20namespace phpMyFAQ\Setup\Migration\QueryBuilder\Dialect;
21
22use phpMyFAQ\Setup\Migration\QueryBuilder\DialectInterface;
23
24class PostgresDialect implements DialectInterface
25{
26    public function getType(): string
27    {
28        return 'pgsql';
29    }
30
31    public function integer(): string
32    {
33        return 'INTEGER';
34    }
35
36    public function bigInteger(): string
37    {
38        return 'BIGINT';
39    }
40
41    public function smallInteger(): string
42    {
43        return 'SMALLINT';
44    }
45
46    public function varchar(int $length): string
47    {
48        return "VARCHAR({$length})";
49    }
50
51    public function text(): string
52    {
53        return 'TEXT';
54    }
55
56    public function longText(): string
57    {
58        return 'TEXT';
59    }
60
61    public function blob(): string
62    {
63        return 'BYTEA';
64    }
65
66    public function boolean(): string
67    {
68        return 'SMALLINT';
69    }
70
71    public function timestamp(): string
72    {
73        return 'TIMESTAMP';
74    }
75
76    public function date(): string
77    {
78        return 'DATE';
79    }
80
81    public function char(int $length): string
82    {
83        return "CHAR({$length})";
84    }
85
86    public function currentTimestamp(): string
87    {
88        return 'CURRENT_TIMESTAMP';
89    }
90
91    public function currentDate(): string
92    {
93        return 'CURRENT_DATE';
94    }
95
96    public function autoIncrement(string $columnName): string
97    {
98        return "{$columnName} SERIAL NOT NULL";
99    }
100
101    public function createTablePrefix(string $tableName, bool $ifNotExists = false): string
102    {
103        $exists = $ifNotExists ? 'IF NOT EXISTS ' : '';
104        return "CREATE TABLE {$exists}{$tableName}";
105    }
106
107    public function createTableSuffix(): string
108    {
109        return '';
110    }
111
112    public function addColumn(string $tableName, string $columnName, string $type, ?string $after = null): string
113    {
114        // PostgreSQL doesn't support AFTER clause
115        return "ALTER TABLE {$tableName} ADD COLUMN {$columnName} {$type}";
116    }
117
118    public function modifyColumn(string $tableName, string $columnName, string $newType): string
119    {
120        return "ALTER TABLE {$tableName} ALTER COLUMN {$columnName} TYPE {$newType}";
121    }
122
123    /**
124     * @param string[] $columns
125     */
126    public function createIndex(string $indexName, string $tableName, array $columns, bool $ifNotExists = false): string
127    {
128        $columnList = implode(', ', $columns);
129        $exists = $ifNotExists ? 'IF NOT EXISTS ' : '';
130        return "CREATE INDEX {$exists}{$indexName} ON {$tableName} ({$columnList})";
131    }
132
133    public function dropIndex(string $indexName, string $tableName): string
134    {
135        return "DROP INDEX {$indexName}";
136    }
137
138    public function supportsColumnPositioning(): bool
139    {
140        return false;
141    }
142
143    public function supportsCombinedAlter(): bool
144    {
145        return false;
146    }
147
148    public function quoteIdentifier(string $identifier): string
149    {
150        return '"' . str_replace(search: '"', replace: '""', subject: $identifier) . '"';
151    }
152}