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How to check my queries if they are ANSI compatible? (Tip of the day)

Antonios Chatzipavlis

Friday 13 January 2012

Αρκετές φορές έχω ερωτηθεί και έχω πει την άποψη μου για το τι είναι ANSI Transact SQL και τι όχι, όπως επίσης έχω πει και το πόσο ο SQL Server έχει δώσει βάρος στο να είναι κοντά στο ANSI.

Όπως και να έχει όμως είτε θέλω να γράφω pure ANSI επειδή ενδεχομένως να θέλω portability είτε γιατί απλά είμαι περίεργος και θέλω να ξέρω αυτό που γράφω πόσο ANSI είναι , μπορώ το κάνω απλά χρησιμοποιώντας την SET FIPS_FLAGGER <level> πριν από την εκτέλεση του/των query(s) που θέλω να ελέγξω.

Στην παράμετρο level ορίζω την «αυστηρότητα» του ελέγχου μου. Οι τιμές που η παράμετρος μπορεί να δεχθεί είναι

Value	Description
ENTRY	Standards checking for ISO entry-level compliance.
FULL	Standards checking for ISO full compliance.
INTERMEDIATE	Standards checking for ISO intermediate-level compliance.
OFF	No standards checking.

Έτσι αν για παράδειγμα θέλω να ελέγξω αν το

 select top(5) * from sys.databases
go
 

είναι 100% ANSI Compatible τότε εκτελώ.

 set fips_flagger 'full'
go
 
select top(5) * from sys.databases
go
 

Το οποίο θα μου δώσεις τα παρακάτω messages

 FIPS Warning: Line 1 has the non-ANSI statement 'SET'.
FIPS Warning: Line 2 has the non-ANSI clause 'TOP'.
 

Antonios Chatzipavlis

Antonios is a Data Solutions Consultant and Trainer. He has been working in IT since 1988. In his career, he has worked as senior developer, IT Manager, Solutions Architect and IT Consultant. Since 1995 he has been devoted on new technologies and software development tools, mainly by Microsoft, either by training company staff and colleagues or assisting them in design, development and implementation as a consultant or chief developer. He has focused in Databases and Data Science since 1995. He specialized in Microsoft SQL Server since version 6.0 in areas like SQL Server Internals, Database Design and Development, Business Intelligence and in 2010 he has started working with Azure Data Platform, NoSQL databases, Big Data Technologies and Machine Learning. He is an active member of many IT communities in Greece, answering colleagues' questions and writing articles in his web site. He is the owner of SQLschool.gr which is a community portal with a lot of information about Microsoft SQL Server. He has been a Microsoft Certified Trainer (MCT) since 2000. Microsoft honored him as MVP on Data Platform due to his activities in SQL Server since 2010. He holds a large number of Microsoft Certifications and Microsoft SQL Server Certifications since version 6.5.