September 25, 2017 by Kenneth Fisher
There are a fair number of options settings. ANSI_NULLS, ARITHABORT, QUOTED_IDENTIFIER, etc. Each session has its own set of configurations. They are initially set based on the user settings system configuration, then the various connection programs (SSMS for example) can override that, then the various SET commands can override that.
Now personally I prefer to keep my settings to the default to eliminate confusion but they do get changed occasionally. Just as a for example, when you generate a script from SSMS it typically includes a bunch of SET ON and SET OFF commands. And if you turn on a setting that was already on, then turn it off and the end, well, your setting has changed unexpectedly. My original intent for this post was to create a stored procedure that would let you save the current settings and restore them. Unfortunately, I ran into a scope problem. I can find the current settings: @@options. I can break down the integer value using a script from here (just in case the post should disappear before this one does here is the code from the article)
DECLARE @options INT SELECT @options = @@OPTIONS PRINT @options IF ( (1 & @options) = 1 ) PRINT 'DISABLE_DEF_CNST_CHK' IF ( (2 & @options) = 2 ) PRINT 'IMPLICIT_TRANSACTIONS' IF ( (4 & @options) = 4 ) PRINT 'CURSOR_CLOSE_ON_COMMIT' IF ( (8 & @options) = 8 ) PRINT 'ANSI_WARNINGS' IF ( (16 & @options) = 16 ) PRINT 'ANSI_PADDING' IF ( (32 & @options) = 32 ) PRINT 'ANSI_NULLS' IF ( (64 & @options) = 64 ) PRINT 'ARITHABORT' IF ( (128 & @options) = 128 ) PRINT 'ARITHIGNORE' IF ( (256 & @options) = 256 ) PRINT 'QUOTED_IDENTIFIER' IF ( (512 & @options) = 512 ) PRINT 'NOCOUNT' IF ( (1024 & @options) = 1024 ) PRINT 'ANSI_NULL_DFLT_ON' IF ( (2048 & @options) = 2048 ) PRINT 'ANSI_NULL_DFLT_OFF' IF ( (4096 & @options) = 4096 ) PRINT 'CONCAT_NULL_YIELDS_NULL' IF ( (8192 & @options) = 8192 ) PRINT 'NUMERIC_ROUNDABORT' IF ( (16384 & @options) = 16384 ) PRINT 'XACT_ABORT'
Then I modified that slightly to restore the options.
DECLARE @options int -- Set @options to the old value of @@options. -- https://technet.microsoft.com/en-us/library/ms175103(v=sql.105).aspx --IF SERVERPROPERTY('ProductVersion') < '10.6' -- IF ( (1 & @options) = 1) -- SET DISABLE_DEF_CNST_CHK ON -- ELSE -- SET DISABLE_DEF_CNST_CHK OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-implicit-transactions-transact-sql IF ( (2 & @options) = 2) SET IMPLICIT_TRANSACTIONS ON ELSE SET IMPLICIT_TRANSACTIONS OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-cursor-close-on-commit-transact-sql IF ( (4 & @options) = 4) SET CURSOR_CLOSE_ON_COMMIT ON ELSE SET CURSOR_CLOSE_ON_COMMIT OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-ansi-warnings-transact-sql IF ( (8 & @options) = 8) SET ANSI_WARNINGS ON ELSE SET ANSI_WARNINGS OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-ansi-padding-transact-sql IF ( (16 & @options) = 16) SET ANSI_PADDING ON ELSE SET ANSI_PADDING OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-ansi-nulls-transact-sql IF ( (32 & @options) = 32) SET ANSI_NULLS ON ELSE SET ANSI_NULLS OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-arithabort-transact-sql IF ( (64 & @options) = 64) SET ARITHABORT ON ELSE SET ARITHABORT OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-arithignore-transact-sql IF ( (128 & @options) = 128) SET ARITHIGNORE ON ELSE SET ARITHIGNORE OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-quoted-identifier-transact-sql IF ( (256 & @options) = 256) SET QUOTED_IDENTIFIER ON ELSE SET QUOTED_IDENTIFIER OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-nocount-transact-sql IF ( (512 & @options) = 512) SET NOCOUNT ON ELSE SET NOCOUNT OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-ansi-null-dflt-on-transact-sql IF ( (1024 & @options) = 1024) SET ANSI_NULL_DFLT_ON ON ELSE SET ANSI_NULL_DFLT_ON OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-ansi-null-dflt-off-transact-sql IF ( (2048 & @options) = 2048) SET ANSI_NULL_DFLT_OFF ON ELSE SET ANSI_NULL_DFLT_OFF OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-concat-null-yields-null-transact-sql IF ( (4096 & @options) = 4096) SET CONCAT_NULL_YIELDS_NULL ON ELSE SET CONCAT_NULL_YIELDS_NULL OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-numeric-roundabort-transact-sql IF ( (8192 & @options) = 8192) SET NUMERIC_ROUNDABORT ON ELSE SET NUMERIC_ROUNDABORT OFF -- https://docs.microsoft.com/en-us/sql/t-sql/statements/set-xact-abort-transact-sql IF ( (16384 & @options) = 16384) SET XACT_ABORT ON ELSE SET XACT_ABORT OFF
Things were going great until I put the code into a stored procedure. And then as I said above I discovered a scope issue. The scope of the set commands is local. Meaning that while they changed the options, they only changed them within the stored procedure (and presumably any code I called from within the stored procedure). As soon as I came back out of the stored procedure the options were back to where they were.
So basically this post is here to help people (well, really me) find the list of values for the various options. Also in case anyone wants/needs the restore code.