SqlBuilderMixin: wrap column names in backticks

[macbre]

We have tables that have order column, let's wrap column names in backticks when performing INSERT query.

INSERT IGNORE INTO vpt_asset(asset_id, updated_by, section, updated_at, program_id, data, order) VALUES (%(asset_id)s, %(updated_by)s, %(section)s, %(updated_at)s, %(program_id)s, %(data)s, %(order)s);

CREATE TABLE `vpt_asset` ( `asset_id` int(10) unsigned NOT NULL AUTO_INCREMENT, `program_id` int(10) unsigned NOT NULL, `section` varchar(255) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT '', `order` tinyint(4) NOT NULL DEFAULT '1', `data` blob NOT NULL, `updated_by` int(10) unsigned NOT NULL, `updated_at` datetime NOT NULL, PRIMARY KEY (`asset_id`), UNIQUE KEY `asset` (`program_id`,`section`,`order`), KEY `program_id` (`program_id`,`section`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1;

@wladekb

[wladekb]

I'd rather

map(lambda s: '`{}`'.format(s), columns) 

so that the backticks stay in one place and the code is more readable overall.

[macbre]

Changed the implementation in 9bf2479