The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for November 21st, 2019

ALTER DATABASE Compatibility Level (Transact-SQL) | Microsoft Docs

Posted by jpluimers on 2019/11/21

Since I keep forgetting which numeric value can correspond to what kind of server: [WayBack] ALTER DATABASE Compatibility Level (Transact-SQL) | Microsoft Docs

Product Database Engine Version Compatibility Level Designation Supported Compatibility Level Values
SQL Server 2019 15 150 150, 140, 130, 120, 110, 100
SQL Server 2017 (14.x) 14 140 140, 130, 120, 110, 100
Azure SQL Database logical server 12 130 150, 140, 130, 120, 110, 100
Azure SQL Database Managed Instance 12 130 150, 140, 130, 120, 110, 100
SQL Server 2016 (13.x) 13 130 130, 120, 110, 100
SQL Server 2014 (12.x) 12 120 120, 110, 100
SQL Server 2012 (11.x) 11 110 110, 100, 90
SQL Server 2008 R2 10.5 100 100, 90, 80
SQL Server 2008 10 100 100, 90, 80
SQL Server 2005 (9.x) 9 90 90, 80
SQL Server 2000 8 80 80

–jeroen

Posted in Database Development, Development, SQL Server | Leave a Comment »

Unorthodocs: Abandon your DVCS and Return to Sanity – bitquabit

Posted by jpluimers on 2019/11/21

Some interesting thoughts on DVCS: [WayBack] Unorthodocs: Abandon your DVCS and Return to Sanity – bitquabit

Besides the very good point it raises about DVCS (Git, Mercurial and most other DVCSes treat the whole state of the repository as the atom) it also indicates quite a few shortcomings:

  • most people hardly ever need the full history to be off-line
  • having the full history means repositories get huge in size, including your off-line clone
  • pseudo-solutions for huge repository sizes – like git-LFS or git-annex – are a no-go because now you loose atomicity
  • huge repositories in file or commit counts make them slow, especially when the trees are deep
  • splitting up repositories isn’t a good idea either because again: you loose atomicity
  • all DVCS are hard, not just git, because they are distributed and full of features
  • the workflow for submitting pull requests is quite a bit longer than submitting a patch, even though merging in a DVCS can be hard too (despite atomicity which does help a lot for DVCS systems)

I see many other advantages of DVCS systems (for instance that you only need to locally have the branches you are interested in, way better tooling for DVCS systems, ditto for sites hosting DVCS), but it always a good thing to know the weak spots of what you are working with.

–jeroen

Posted in Development, DVCS - Distributed Version Control, git, Mercurial/Hg, Software Development, Source Code Management | Leave a Comment »

Scopes and names can really be deceiving. A classes in a hierarchy can have members with identical names…

Posted by jpluimers on 2019/11/21

Examples like the one below from [WayBack] Scopes and names can really be deceiving. A root class and a descendant class can both have public fields, properties and methods with the same name… – Lars Fosdal – Google+ used to be part of the “language day” during my 5 day Delphi introductory courses.

Maybe I should find back more of those from the days, brush them up a little, then post them in a repository.

The thread has some nice references to tools that give better warnings and comparisons with other languages.

Anyone wanting to assist with that?

Example code

Read the rest of this entry »

Posted in Delphi, Development, Software Development | Leave a Comment »