drop TableView isPersistent field

it is redundant, we already have the isTemporary field in a superclass

h2/src/main/org/h2/command/dml/Select.java

@@ -1150,7 +1150,7 @@ public class Select extends Query {
             TableView tableView = t.isView() ? (TableView) t : null;
             if (tableView != null && tableView.isRecursive() && tableView.isTableExpression()) {
 
-                if (tableView.isPersistent()) {
+                if (!tableView.isTemporary()) {
                     // skip the generation of plan SQL for this already recursive persistent CTEs,
                     // since using a with statement will re-create the common table expression
                     // views.

h2/src/main/org/h2/table/TableView.java

@@ -63,14 +63,13 @@ public class TableView extends Table {
     private ResultInterface recursiveResult;
     private boolean isRecursiveQueryDetected;
     private boolean isTableExpression;
-    private boolean isPersistent;
 
     public TableView(Schema schema, int id, String name, String querySQL,
             ArrayList<Parameter> params, Column[] columnTemplates, Session session,
             boolean allowRecursive, boolean literalsChecked, boolean isTableExpression, boolean isPersistent) {
         super(schema, id, name, false, true);
-        init(querySQL, params, columnTemplates, session, allowRecursive, literalsChecked, isTableExpression,
-                isPersistent);
+        setTemporary(!isPersistent);
+        init(querySQL, params, columnTemplates, session, allowRecursive, literalsChecked, isTableExpression);
     }
 
     /**
@@ -92,11 +91,11 @@ public class TableView extends Table {
         init(querySQL, null,
                 newColumnTemplates == null ? this.columnTemplates
                         : newColumnTemplates,
-                session, recursive, literalsChecked, isTableExpression, isPersistent);
+                session, recursive, literalsChecked, isTableExpression);
         DbException e = recompile(session, force, true);
         if (e != null) {
             init(oldQuerySQL, null, oldColumnTemplates, session, oldRecursive,
-                    literalsChecked, isTableExpression, isPersistent);
+                    literalsChecked, isTableExpression);
             recompile(session, true, false);
             throw e;
         }
@@ -104,13 +103,12 @@ public class TableView extends Table {
 
     private synchronized void init(String querySQL, ArrayList<Parameter> params,
             Column[] columnTemplates, Session session, boolean allowRecursive, boolean literalsChecked,
-            boolean isTableExpression, boolean isPersistent) {
+            boolean isTableExpression) {
         this.querySQL = querySQL;
         this.columnTemplates = columnTemplates;
         this.allowRecursive = allowRecursive;
         this.isRecursiveQueryDetected = false;
         this.isTableExpression = isTableExpression;
-        this.isPersistent = isPersistent;
         index = new ViewIndex(this, querySQL, params, allowRecursive);
         initColumnsAndTables(session, literalsChecked);
     }
@@ -716,10 +714,6 @@ public class TableView extends Table {
         return tables;
     }
 
-    public boolean isPersistent() {
-        return isPersistent;
-    }
-
     /**
      * Create a view.
      *