ENH: added test of EffectSchema() for SQLite backends. Please note that,

     due to the very limited instrospection capabilities offered by
     the SQLite interface (e.g., no equivalent of "DESCRIBE" nor
     "SHOW INDEX" commands), the test does not verify that all aspects
     of the schema have indeed been transformed into a DB representation.

IO/Testing/Cxx/TestSQLiteDatabase.cxx

@@ -22,11 +22,13 @@
 
 #include "vtkSQLiteDatabase.h"
 #include "vtkSQLQuery.h"
+#include "vtkSQLDatabaseSchema.h"
 #include "vtkRowQueryToTable.h"
 #include "vtkStdString.h"
 #include "vtkTable.h"
 #include "vtkVariant.h"
 #include "vtkVariantArray.h"
+#include <vtkstd/vector>
 
 int TestSQLiteDatabase( int /*argc*/, char* /*argv*/[])
 {
@@ -151,5 +153,107 @@ int TestSQLiteDatabase( int /*argc*/, char* /*argv*/[])
   query->Delete();
   db->Delete();
 
+// ----------------------------------------------------------------------
+// Testing transformation of a schema into a SQLite database
+
+  // 1. Create the schema
+  cerr << "@@ Creating a schema...";
+
+  vtkSQLDatabaseSchema* schema = vtkSQLDatabaseSchema::New();
+  schema->SetName( "TestSchema" );
+
+  int tblHandle = schema->AddTableMultipleArguments( "StrangeTable",
+    vtkSQLDatabaseSchema::COLUMN_TOKEN, vtkSQLDatabaseSchema::INTEGER, "TableKey",  0, "",
+    vtkSQLDatabaseSchema::COLUMN_TOKEN, vtkSQLDatabaseSchema::VARCHAR, "SomeName", 11, "NOT NULL",
+    vtkSQLDatabaseSchema::COLUMN_TOKEN, vtkSQLDatabaseSchema::BIGINT,  "SomeNmbr", 17, "DEFAULT 0",
+    vtkSQLDatabaseSchema::INDEX_TOKEN,  vtkSQLDatabaseSchema::PRIMARY_KEY, "BigKey",
+    vtkSQLDatabaseSchema::INDEX_COLUMN_TOKEN, "TableKey",
+    vtkSQLDatabaseSchema::END_INDEX_TOKEN,
+    vtkSQLDatabaseSchema::INDEX_TOKEN,  vtkSQLDatabaseSchema::UNIQUE, "ReverseLookup",
+    vtkSQLDatabaseSchema::INDEX_COLUMN_TOKEN, "SomeName",
+    vtkSQLDatabaseSchema::INDEX_COLUMN_TOKEN, "SomeNmbr",
+    vtkSQLDatabaseSchema::END_INDEX_TOKEN,
+    vtkSQLDatabaseSchema::TRIGGER_TOKEN,  vtkSQLDatabaseSchema::AFTER_INSERT,
+      "InsertTrigger", "INSERT INTO OtherTable ( Value ) VALUES NEW.SomeNmbr",
+    vtkSQLDatabaseSchema::END_TABLE_TOKEN
+  );
+
+  if ( tblHandle < 0 )
+    {
+    cerr << "Could not create test schema.\n";
+    return 1;
+    }
+  cerr << " done." << endl;
+  
+  // 2. Convert the schema into a SQLite database
+  cerr << "@@ Converting the schema into a SQLite database...";
+
+  vtkSQLiteDatabase* dbSch = vtkSQLiteDatabase::SafeDownCast( vtkSQLDatabase::CreateFromURL( "sqlite://:memory:" ) );
+  status = dbSch->Open();
+
+  if ( ! status )
+    {
+    cerr << "Couldn't open database.\n";
+    return 1;
+    }
+
+  status = dbSch->EffectSchema( schema ); 
+  if ( ! status )
+    {
+    cerr << "Could not effect test schema.\n";
+    return 1;
+    }
+  cerr << " done." << endl;
+
+  // 3. Count tables of the newly created database
+  cerr << "@@ Fetching table names of the newly created database:\n";
+
+  query = dbSch->GetQueryInstance();
+
+  query->SetQuery( "SELECT name FROM sqlite_master WHERE type = \"table\"" );
+  if ( ! query->Execute() )
+    {
+    cerr << "QuerySch failed" << endl;
+    return 1;
+    }
+
+  for ( tblHandle =0; query->NextRow(); ++ tblHandle )
+    {
+    vtkStdString tblNameSch( schema->GetTableNameFromHandle( tblHandle ) );
+    vtkStdString tblNameDB( query->DataValue( 0 ).ToString() );
+    cerr << "     " 
+         << tblNameDB
+         << "\n";
+
+    if ( tblNameDB != tblNameSch )
+      {
+      cerr << "Fetched an incorrect name: " 
+           << tblNameDB
+           << " != " 
+           << tblNameSch
+           << endl;
+      return 1;
+      }
+    }
+
+  if ( tblHandle != schema->GetNumberOfTables() )
+    {
+    cerr << "Found an incorrect number of tables: " 
+         << tblHandle 
+         << " != " 
+         << schema->GetNumberOfTables()
+         << endl;
+    return 1;
+    }
+  
+  cerr << "   "
+       << tblHandle
+       << " found.\n";
+
+  // Clean up
+  dbSch->Delete();
+  schema->Delete();
+  query->Delete();
+
   return 0;
 }