Fix SqlTruncateTable.Clone()

SergeiPavlov · SergeiPavlov · commit 536aa569f541 · 2023-07-18T10:49:48.000-07:00
diff --git a/Orm/Xtensive.Orm/Sql/Ddl/SqlTruncateTable.cs b/Orm/Xtensive.Orm/Sql/Ddl/SqlTruncateTable.cs
@@ -12,10 +12,9 @@ public class SqlTruncateTable : SqlStatement, ISqlCompileUnit
   {
     public Table Table { get; }
 
-    internal override object Clone(SqlNodeCloneContext context) =>
-      context.NodeMapping.TryGetValue(this, out var clone)
-        ? clone
-        : context.NodeMapping[this] = new SqlTruncateTable(Table);
+    internal override SqlTruncateTable Clone(SqlNodeCloneContext context) =>
+      context.GetOrAdd(this, static (t, c) =>
+        new SqlTruncateTable(t.Table));
 
     public override void AcceptVisitor(ISqlVisitor visitor)
     {

Original file line number	Diff line number	Diff line change
`@@ -12,10 +12,9 @@ public class SqlTruncateTable : SqlStatement, ISqlCompileUnit`
`12`	`12`	`{`
`13`	`13`	`public Table Table { get; }`
`14`	`14`
`15`		`- internal override object Clone(SqlNodeCloneContext context) =>`
`16`		`- context.NodeMapping.TryGetValue(this, out var clone)`
`17`		`- ? clone`
`18`		`- : context.NodeMapping[this] = new SqlTruncateTable(Table);`
	`15`	`+ internal override SqlTruncateTable Clone(SqlNodeCloneContext context) =>`
	`16`	`+ context.GetOrAdd(this, static (t, c) =>`
	`17`	`+ new SqlTruncateTable(t.Table));`
`19`	`18`
`20`	`19`	`public override void AcceptVisitor(ISqlVisitor visitor)`
`21`	`20`	`{`