Issue type:

[ ] question
[x] bug report
[ ] feature request
[x] documentation issue

Database system/driver:

[ ] cordova
[ ] mongodb
[ ] mssql
[ ] mysql / mariadb
[ ] oracle
[x] postgres
[ ] sqlite
[ ] sqljs
[ ] react-native
[ ] expo

TypeORM version:

[x] latest
[ ] @next
[ ] 0.x.x (or put your version here)

Steps to reproduce or a small repository showing the problem:
Reproducible with https://github.com/typeorm/typescript-example

1. Create some categories in the DB

Add this snippet

const categoryRepository = getRepository(Category);
const categories = await categoryRepository.find({doesNotExist: 'any value'} as any);
console.log(categories);

I would expect categories to be empty since we're querying a non-existent field. However the query actually returns everything (i.e., every record in the Category table).

Is there any reason the doesNotExist key is not present in the resulting SQL query please?