Updates with joins in postgres

when compiling to mysql there is a clear syntax for joining to an update. However, in postgres the syntax for doing this is update...from, which from what I understand knex can’t really support, because there can only be one primary table. is it possible to compile this ;

knex.from('table').update({a:knex.raw('othertable.a')}).join('othertable', 'othertable.b', 'table.b')

to this;

update table set a = othertable.a from othertable where othertable.b = table.b

particularly when the knex instance is for postgres? I understand that the syntax restricts us to inner joins, so limiting the join methods that work to innerJoin would be reasonable, but at the moment this just silently fails to add anything related to the join, and trying to add a from clause just changes the primary table.

[duzenko]

This worked for me

	await knex( 'managers' ).update( {
		address: knex( 'clients' ).select( 'address' ).where( 'id', knex.raw( '??', ['managers.clientId'] ) ),
	} );

[elhigu]

knex doesn’t support from clause for updates / deletes etc. it works only for select.

However you can do something this (there might be some syntax errors… didn’t run the query):

knex.from('table').update({
  a: knex('othertable').select('a').where('b', knex.raw('??', ['table.b'])
})