# PDOException: SQLSTATE[HY000]: General error: 2053 SQLSTATE[HY000]: General error: 2053 when fetching data from table 'orders' with column 'total_amount' in /var/www/app/src/Repository/OrderRepository.php:42

- **ID:** `php/pdo-unknown-column-type`
- **Domain:** php
- **Category:** data_error
- **Error Code:** `2053`
- **Verification:** ai_generated
- **Fix Rate:** 76%

## Root Cause

PDO driver (e.g., MySQL or PostgreSQL) cannot map a database column type to a PHP type, often due to custom enum types, unsupported geometries, or corrupted column metadata.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| PHP 8.0 | active | — | — |
| PHP 8.1 | active | — | — |
| PHP 8.2 | active | — | — |
| MySQL 8.0 | active | — | — |
| MySQL 8.4 | active | — | — |
| PostgreSQL 15 | active | — | — |
| PostgreSQL 16 | active | — | — |

## Workarounds

1. **Cast the problematic column in the SQL query to a standard type, e.g., `SELECT CAST(total_amount AS DECIMAL(10,2)) AS total_amount FROM orders`.** (85% success)
   ```
   Cast the problematic column in the SQL query to a standard type, e.g., `SELECT CAST(total_amount AS DECIMAL(10,2)) AS total_amount FROM orders`.
   ```
2. **Update the column type in the database to a standard type like DECIMAL or DOUBLE; for custom enums, use a VARCHAR column instead.** (75% success)
   ```
   Update the column type in the database to a standard type like DECIMAL or DOUBLE; for custom enums, use a VARCHAR column instead.
   ```
3. **Use `PDO::ATTR_STRINGIFY_FETCHES` to force all fetched values to strings: `$pdo->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, true);`** (70% success)
   ```
   Use `PDO::ATTR_STRINGIFY_FETCHES` to force all fetched values to strings: `$pdo->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, true);`
   ```

## Dead Ends

- **** — The column type definition is static; restarting does not change how PDO interprets it. (95% fail)
- **** — The error is specific to certain column types, not a general driver failure. (80% fail)
- **** — The error occurs during data retrieval before fetch mode is applied. (85% fail)