[QGIS-Developer] Reduced compatibility with old PosgreSQL/PostGIS databases in v. 4.0.0

[Régis Haubourg]

9.1 has reached end of life 10 years ago!
I'm with Even here. A Postgres server out of maintenance period must be 
considered insecure and outdated and must totally be upgraded anyway.

Cheer, Régis

On 31/03/2026 18:14, Stefanos Natsis via QGIS-Developer wrote:
> One breaking change I'm aware of in QGIS 4 is that we've used the 
> `CREATE TABLE IF NOT EXISTS` idiom for the `qgis_projects` table (for 
> storing projects in the database) which was introduced in PostgreSQL 9.1