When executing queries using PDO in PHP, the PDOStatement::getColumnMeta method can help us obtain metadata of a column in the result set, such as field name, data type, length, etc. However, many developers will find that the information returned by this method is often incomplete, especially when using certain database drivers (such as MySQL). This can cause some logic that depends on field metadata processing to errors or behavior abnormalities.
PDOStatement::getColumnMeta