如何运行从 Knex toNative 返回的查询？

Question

Knex toNative() might return something like this:

{
  sql: 'select "firstName", "lastName" from "table1" where (("age" >= $1 and "country" = $2) or ("age" < $3))',
  bindings: [ 25, 'NL', 25 ]
}

and naively, I thought I could run that like:

knex.raw(q.sql, q.bindings)

which doesn't work:

Expected 3 bindings, saw 0

I use raw queries quite a lot, but always with? and not $1 etc, so I figured this was the difference, and indeed, it works fine if I replace them. That is not so nice though.

What am I missing? How can I run the raw query as-is?

Answer 1

This seems to be an issue with .toNative() when using Postgres. The reason appears to be because knex.raw only expects ? and ?? to be used for positional arguments regardless of the underlying SQL dialect being used but .toNative() uses the postgres positional argument syntax of $ .

If you remove the .toNative() call, so you only call .toSQL() on your query, that should give you the sql and bindings that you can pass directly to knex.raw .