Disables showing of database errors.

Sets $this->charset and $this->collate.

Inserts a row into the table.

Loads the column metadata from the last query.

Logs query data.

Parses the DB_HOST setting to interpret it for mysqli_real_connect().

Generates and returns a placeholder escape string for use in queries returned by ::prepare().

Prepares a SQL query for safe execution.

Prints SQL/DB error.

Adds field charsets to field/value/format arrays generated by wpdb::process_field_formats().