fix Access provider exception for database without Tables or Procedures (#126)

MaceWindu · web-flow · commit 1a1d4bd7bddd · 2025-02-01T16:51:18.000+01:00
diff --git a/Source/DatabaseProviders/AccessProvider.cs b/Source/DatabaseProviders/AccessProvider.cs
@@ -58,8 +58,8 @@ public override void ClearAllPools(string providerName)
 		using var cn = (OleDbConnection)provider.CreateConnection(connectionString);
 		cn.Open();
 
-		var dt1 = cn.GetSchema("Tables"    ).Rows.Cast<DataRow>().Max(static r => (DateTime)r["DATE_MODIFIED"]);
-		var dt2 = cn.GetSchema("Procedures").Rows.Cast<DataRow>().Max(static r => (DateTime)r["DATE_MODIFIED"]);
+		var dt1 = cn.GetSchema("Tables"    ).Rows.Cast<DataRow>().Select(static r => (DateTime)r["DATE_MODIFIED"]).Concat([default]).Max();
+		var dt2 = cn.GetSchema("Procedures").Rows.Cast<DataRow>().Select(static r => (DateTime)r["DATE_MODIFIED"]).Concat([default]).Max();
 		return dt1 > dt2 ? dt1 : dt2;
 	}
 

Original file line number	Diff line number	Diff line change
`@@ -58,8 +58,8 @@ public override void ClearAllPools(string providerName)`
`58`	`58`	`using var cn = (OleDbConnection)provider.CreateConnection(connectionString);`
`59`	`59`	`cn.Open();`
`60`	`60`
`61`		`- var dt1 = cn.GetSchema("Tables" ).Rows.Cast<DataRow>().Max(static r => (DateTime)r["DATE_MODIFIED"]);`
`62`		`- var dt2 = cn.GetSchema("Procedures").Rows.Cast<DataRow>().Max(static r => (DateTime)r["DATE_MODIFIED"]);`
	`61`	`+ var dt1 = cn.GetSchema("Tables" ).Rows.Cast<DataRow>().Select(static r => (DateTime)r["DATE_MODIFIED"]).Concat([default]).Max();`
	`62`	`+ var dt2 = cn.GetSchema("Procedures").Rows.Cast<DataRow>().Select(static r => (DateTime)r["DATE_MODIFIED"]).Concat([default]).Max();`
`63`	`63`	`return dt1 > dt2 ? dt1 : dt2;`
`64`	`64`	`}`
`65`	`65`