Configure placholder identifying character

[capc0]

It would be awesome if we could configure what character acts as the identifiying char for the named attribute.

So instead of using : allow the usage of e.g. @

SELECT * FROM something WHERE id = :id

SELECT * FROM something WHERE id = @id

I want to utilize prepared statements in https://github.com/sidorares/node-mysql2 via .execute in combination with named parameters. Currently all of our code bases uses @ parameters in combination with .query and a custom queryFormat function that replaces these with the actual values.

[s-devaney]

In case anybody else was wondering this, you can override the default character (?) by passing a placeholder property e.g.:

var toUnnamed = require('named-placeholders')({placeholder: '@');

Also the library supports Postgres-style positional placeholders using the undocumented toNumbered function