Program: 130110
Project: 130110
Buggy source:
public static boolean checkSchemaConnection(String schema,Connection connection,boolean notCaseSensitive,String dbType,StringBuffer retPropsedSchema) throws SQLException {
  ExtractMetaDataUtils extractMeta=ExtractMetaDataUtils.getInstance();
  DatabaseMetaData dbMetaData=extractMeta.getDatabaseMetaData(connection,dbType);
  String proposeSchema=null;
  if (dbMetaData != null) {
    ResultSet rs=dbMetaData.getSchemas();
    while (rs.next()) {
      if (notCaseSensitive) {
        if (rs.getString(1).toLowerCase().compareTo(schema.toLowerCase()) == 0) {
          extractMeta.setSchema(rs.getString(1));
          rs.close();
          return (true);
        }
      }
 else {
        String schemaFromDB=rs.getString(1);
        if (schemaFromDB.toLowerCase().compareTo(schema.toLowerCase()) == 0) {
          if (schemaFromDB.compareTo(schema) == 0) {
            extractMeta.setSchema(schema);
            rs.close();
            return (true);
          }
 else {
            proposeSchema=schemaFromDB;
          }
        }
      }
    }
    rs.close();
  }
  if (retPropsedSchema != null && proposeSchema != null) {
    String title=Messages.getString("String_Node_Str");
    String proposeMessage=Messages.getString("String_Node_Str",new Object[]{schema,proposeSchema});
    MessageDialog messageDialog=new MessageDialog(new Shell(),title,null,proposeMessage,MessageDialog.CONFIRM,new String[]{IDialogConstants.YES_LABEL,IDialogConstants.NO_LABEL},0);
    if (messageDialog.open() == 0) {
      retPropsedSchema.append(proposeSchema);
      return true;
    }
  }
  return false;
}

Fixed version (ground truth):
public static boolean checkSchemaConnection(final String schema,Connection connection,boolean notCaseSensitive,String dbType,final StringBuffer retPropsedSchema) throws SQLException {
  ExtractMetaDataUtils extractMeta=ExtractMetaDataUtils.getInstance();
  DatabaseMetaData dbMetaData=extractMeta.getDatabaseMetaData(connection,dbType);
  final StringBuffer proposeSchema=new StringBuffer();
  if (dbMetaData != null) {
    ResultSet rs=dbMetaData.getSchemas();
    while (rs.next()) {
      if (notCaseSensitive) {
        if (rs.getString(1).toLowerCase().compareTo(schema.toLowerCase()) == 0) {
          extractMeta.setSchema(rs.getString(1));
          rs.close();
          return (true);
        }
      }
 else {
        String schemaFromDB=rs.getString(1);
        if (schemaFromDB.toLowerCase().compareTo(schema.toLowerCase()) == 0) {
          if (schemaFromDB.compareTo(schema) == 0) {
            extractMeta.setSchema(schema);
            rs.close();
            return (true);
          }
 else {
            proposeSchema.append(schemaFromDB);
          }
        }
      }
    }
    rs.close();
  }
  if (retPropsedSchema != null && 0 < proposeSchema.length()) {
    final StringBuffer userSelectResult=new StringBuffer();
    Display.getDefault().syncExec(new Runnable(){
      public void run(){
        String title=Messages.getString("String_Node_Str");
        String proposeMessage=Messages.getString("String_Node_Str",new Object[]{schema,proposeSchema});
        MessageDialog messageDialog=new MessageDialog(new Shell(),title,null,proposeMessage,MessageDialog.CONFIRM,new String[]{IDialogConstants.YES_LABEL,IDialogConstants.NO_LABEL},0);
        if (messageDialog.open() == 0) {
          retPropsedSchema.append(proposeSchema);
          userSelectResult.append("String_Node_Str");
        }
      }
    }
);
    if (0 < userSelectResult.length()) {
      return true;
    }
  }
  return false;
}