NH-3496 - fix sequence drop if sequence does not exist.

nieprzecietny · hazzik · commit 16def584aca8 · 2013-07-16T21:10:30.000+12:00
diff --git a/src/NHibernate/Dialect/MsSql2012Dialect.cs b/src/NHibernate/Dialect/MsSql2012Dialect.cs
@@ -28,7 +28,9 @@ protected override string GetCreateSequenceString(string sequenceName, int initi
 
 		public override string GetDropSequenceString(string sequenceName)
 		{
-			return "drop sequence " + sequenceName;
+			string dropSequence = "IF EXISTS (select * from sys.sequences where name = N'{0}') DROP SEQUENCE {0}";
+
+			return string.Format(dropSequence, sequenceName);
 		}
 
 		public override string GetSequenceNextValString(string sequenceName)

Original file line number	Diff line number	Diff line change
`@@ -28,7 +28,9 @@ protected override string GetCreateSequenceString(string sequenceName, int initi`
`28`	`28`
`29`	`29`	`public override string GetDropSequenceString(string sequenceName)`
`30`	`30`	`{`
`31`		`- return "drop sequence " + sequenceName;`
	`31`	`+ string dropSequence = "IF EXISTS (select * from sys.sequences where name = N'{0}') DROP SEQUENCE {0}";`
	`32`	`+`
	`33`	`+ return string.Format(dropSequence, sequenceName);`
`32`	`34`	`}`
`33`	`35`
`34`	`36`	`public override string GetSequenceNextValString(string sequenceName)`