Postgres identifier exceeds limit on eager relations

[nurdism]

Issue Description

Postgres identifier exceeds limit on eager relations

Expected Behavior

eager relations "relation alias" or identifier should not exceed Postgres's (or the driver's) limit

Actual Behavior

eager relations identifier do not get shortened when a query is built

Steps to Reproduce

https://github.com/nurdism/typeorm_issue

My Environment

Dependency	Version
Operating System	Debian Linux
Node.js version	v14.16.0
Typescript version	v4.2.3
TypeORM version	v0.2.31

Additional Context

I've found the issue, its here, the function is missing the length check for the relationAlias var. My question is, should I use StringUtils.shorten(relationAlias) (used here) or StringUtils.hash(relationAlias) (used here)
or should I use the has function

Relevant Database Driver(s)

• aurora-data-api
• aurora-data-api-pg
• better-sqlite3
• cockroachdb
• cordova
• expo
• mongodb
• mysql
• nativescript
• oracle
• postgres
• react-native
• sap
• sqlite
• sqlite-abstract
• sqljs
• sqlserver

Are you willing to resolve this issue by submitting a Pull Request?

• Yes, I have the time, and I know how to start.
• Yes, I have the time, but I don't know how to start. I would need guidance.
• No, I don't have the time, although I believe I could do it if I had the time...
• No, I don't have the time and I wouldn't even know how to start.