There is always the possibility to create a trigger to check unicity from all local indexes, but this is not scalable. However, when using PostgreSQL declarative partitioning on top of it, there is the same limitation for unique constraints. This doesn't hurt scalability in YugabyteDB because all secondary indexes are global in YugabyteDB at sharding level.
They often have one or multiple natural keys in addition to one immutable surrogate key chose as the primary key. OLTP applications rarely have only one unique key. They don't in PostgreSQL, and that limits the possibilities of ensuring unique constraints on other columns than the partition key. This is the IvorySQL fork from PostgreSQL 15.1 and, by default, with Oracle-compatibility disabled:īefore looking at what is documented as Compatibility Features I'm curious about Global Unique Index implementation. I start a Centos7 container on my laptop and bash into it:Įnter fullscreen mode Exit fullscreen mode What I'm testing here is documented and open-source but nothing is better than a quick test to look at the corner cases. In this blog post, I'm testing IvorySQL, a fork of PostgreSQL, which provides some compatibility with some Oracle syntax, in a similar way as orafce but on other features.
#ORACLE SQL DEVELOPER POSTGRESQL FULL#
Even if it will never be a full solution, it may ease your migration by not having to re-write all use cases immediately. However, because there is a big market here, many companies try to add an Oracle- compatibility layer to PostgreSQL. Let me break you dreams to avoid any frustration at the end: there is no magic solution. But one question remains: can you lift-and-shift legacy applications, using the old non-ANSI SQL syntax and proprietary PL/SQL code, to PostgreSQL? And with Distributed SQL databases, Maximum Availability can be provided ( here is a comparison or Oracle MAA with YugabyteDB native HA). From an infrastructure point of view, There are many managed services running PostgreSQL or PostgreSQL-compatible database services. Many companies want to move from Oracle Database to PostgreSQL.
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