PostgreSQL 12 compatibility (lack of consrc)

Issue type: [x] bug report [x] feature request

Database system/driver: [x] postgres

TypeORM version: [x] latest [x] @next

Steps to reproduce or a small repository showing the problem: PostgreSQL 12 removes the pg_constraint.consrc column. This makes constraintsSql from loadTables in PostgresQueryRunner.ts fail with an exception and aborting the transaction. Documentation:

• PostgreSQL 12
• PostgreSQL 11

The docs for 11 still include consrc, but recommend to use pg_get_constraintdef, which only seems to be used for exclusions constraints (x) here. This has been introduced in #2710 for exclusions constraints. It seems that expression is used in some places, but giving it a very rough look I think whatever pg_get_constraintdef returns might work as well. Always using pg_get_constraintdef at least gets my 1 entity test running, but this obviously does not use many constraints.

[viktor-ku]

@Kononnable I see that it’s fixed in the fork of typeorm. Will it be fixed also in the main typeorm (this) repo some day?

[zishe]

It works in 0.2.21! Thanks!