The statement "drop all objects" did not work if a table depends on a view via a constraint.

h2/src/docsrc/html/changelog.html

@@ -18,7 +18,8 @@ Change Log
 <h1>Change Log</h1>
 
 <h2>Next Version (unreleased)</h2>
-<ul><li>Subqueries or views with "order by" an alias expression could not be executed
+<ul><li>The statement "drop all objects" did not work if a table depends on a view via a constraint.
+</li><li>Subqueries or views with "order by" an alias expression could not be executed
     due to a regression introduced in version 1.3.174.
 </li><li>Issue 73: MySQL compatibility: support REPLACE, patch by Cemo Koc.
 </li><li>The spatial index now works in MVCC mode when using the MVStore storage.

h2/src/main/org/h2/command/ddl/DropDatabase.java

@@ -53,39 +53,45 @@ public class DropDatabase extends DefineCommand {
                 db.removeDatabaseObject(session, schema);
             }
         }
+
+        // There can be dependencies between tables e.g. using computed columns,
+        // so we might need to loop over them multiple times.
+        boolean runLoopAgain;
+        do {
             ArrayList<Table> tables = db.getAllTablesAndViews(false);
+            ArrayList<Table> toRemove = New.arrayList();
             for (Table t : tables) {
                 if (t.getName() != null && Table.VIEW.equals(t.getTableType())) {
-                db.removeSchemaObject(session, t);
+                    toRemove.add(t);
                 }
             }
             for (Table t : tables) {
                 if (t.getName() != null && Table.TABLE_LINK.equals(t.getTableType())) {
-                db.removeSchemaObject(session, t);
+                    toRemove.add(t);
                 }
             }
-
-        // There can be dependencies between tables e.g. using computed columns,
-        // so we might need to loop over them multiple times.
-        boolean runLoopAgain = false;
-        do {
-            runLoopAgain = false;
             for (Table t : tables) {
                 if (t.getName() != null && Table.TABLE.equals(t.getTableType()) && !t.isHidden()) {
-                    if (db.getDependentTable(t, t) == null) {
-                        db.removeSchemaObject(session, t);
-                    } else {
-                        runLoopAgain = true;
-                    }
+                    toRemove.add(t);
                 }
             }
-        } while (runLoopAgain);
-
             for (Table t : tables) {
                 if (t.getName() != null && Table.EXTERNAL_TABLE_ENGINE.equals(t.getTableType()) && !t.isHidden()) {
+                    toRemove.add(t);
+                }
+            }
+            runLoopAgain = false;
+            for (Table t : toRemove) {
+                if (t.getName() == null) {
+                    // ignore
+                } else if (db.getDependentTable(t, t) == null) {
                     db.removeSchemaObject(session, t);
+                } else {
+                    runLoopAgain = true;
                 }
             }
+        } while (runLoopAgain);
+
         session.findLocalTempTable(null);
         ArrayList<SchemaObject> list = New.arrayList();
         list.addAll(db.getAllSchemaObjects(DbObject.SEQUENCE));

h2/src/main/org/h2/engine/Database.java

@@ -1643,6 +1643,8 @@ public class Database implements DataHandler {
         for (Table t : getAllTablesAndViews(false)) {
             if (except == t) {
                 continue;
+            } else if (Table.VIEW.equals(t.getTableType())) {
+                continue;
             }
             set.clear();
             t.addDependencies(set);

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

@@ -7,10 +7,13 @@
 package org.h2.table;
 
 import java.util.ArrayList;
+import java.util.HashSet;
+
 import org.h2.command.Prepared;
 import org.h2.command.dml.Query;
 import org.h2.constant.ErrorCode;
 import org.h2.engine.Constants;
+import org.h2.engine.DbObject;
 import org.h2.engine.Session;
 import org.h2.engine.User;
 import org.h2.expression.Expression;
@@ -504,4 +507,16 @@ public class TableView extends Table {
         return tableExpression;
     }
     
+    @Override
+    public void addDependencies(HashSet<DbObject> dependencies) {
+        super.addDependencies(dependencies);
+        if (tables != null) {
+            for (Table t : tables) {
+                if (!Table.VIEW.equals(t.getTableType())) {
+                    t.addDependencies(dependencies);
+                }
+            }
+        }
+    }
+
 }

h2/src/test/org/h2/test/db/TestDrop.java

@@ -34,12 +34,21 @@ public class TestDrop extends TestBase {
         conn = getConnection("drop");
         stat = conn.createStatement();
 
+        testTableDependsOnView();
         testComputedColumnDependency();
 
         conn.close();
         deleteDb("drop");
     }
     
+    private void testTableDependsOnView() throws SQLException {
+        stat.execute("drop all objects");
+        stat.execute("create table a(x int)");
+        stat.execute("create view b as select * from a");
+        stat.execute("create table c(y int check (select count(*) from b) = 0)");
+        stat.execute("drop all objects");
+    }
+
     private void testComputedColumnDependency() throws SQLException {
         stat.execute("DROP ALL OBJECTS");
         stat.execute("CREATE TABLE A (A INT);");
@@ -50,4 +59,5 @@ public class TestDrop extends TestBase {
         stat.execute("CREATE TABLE TEST_SCHEMA.B (B INT AS SELECT A FROM TEST_SCHEMA.A);");
         stat.execute("DROP SCHEMA TEST_SCHEMA");
     }
+    
 }