{
    "id": "pdo176-visibility",
    "title": "Увидеть изменение другой сессии: READ COMMITTED и SNAPSHOT",
    "columns": [
        "Наблюдение",
        "Результат"
    ],
    "rows": [
        [
            "READ_COMMITTED в той же транзакции",
            "10 → 20"
        ],
        [
            "REPEATABLE_READ в той же транзакции",
            "10 → 10"
        ],
        [
            "После завершения и нового чтения",
            "20 в обоих режимах"
        ]
    ],
    "checks": {
        "read_committed_refresh": true,
        "snapshot_stable": true,
        "transaction_finished": true,
        "owned_objects_removed": true
    },
    "observations": {
        "sequence": "reader SELECT 10; writer UPDATE 20 + COMMIT; reader SELECT; reader COMMIT; new SELECT",
        "samples": [
            {
                "mode": "READ_COMMITTED",
                "before": 10,
                "same_transaction": 20,
                "new_read": 20
            },
            {
                "mode": "REPEATABLE_READ",
                "before": 10,
                "same_transaction": 10,
                "new_read": 20
            }
        ]
    },
    "runtime": {
        "php": "8.5.11",
        "extension": "8.5.11",
        "pdo": "8.5.11",
        "driver": "firebird",
        "server_version": "5.0.4",
        "client_version": "WI-V6.3.4.1812 Firebird 5.0",
        "api_version": 40,
        "database": "phpmanual176",
        "transport": "isolated_loopback_tcp"
    },
    "owned_objects": [
        {
            "type": "TABLE",
            "name": "P176_VISIBILITY_FAC916D0B7"
        }
    ],
    "removed_objects": [
        {
            "type": "TABLE",
            "name": "P176_VISIBILITY_FAC916D0B7"
        }
    ]
}