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Introduction

The Time Series Lister is a display to verify and inspect time series which are written to the database in any workflow. 

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figure Figure 1a: the GUI of the Time Series Lister (with a workflow selected)

When a filter - location - parameter selection is made via the Data Viewer, the Time Series Lister results will be filtered accordingly.

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figure Figure 1b: the GUI of the Time Series Lister (with a workflow selected AND a Data Viewer selection)

The Time Series Lister is a pre-configured display and a very handy tool for inspecting the contents of the FEWS database (localdatastorelocalDataStore). It provides an overview in tabular form of statistics and other metadata (columns) of the timeseries time series (rows) in the database. To aid the inspection of data, the user can add or remove columns, and select and filter rows. From the Time Series Lister, it is also possible to access the content (=values) of selected timeseries time series by opening the timeseries time series display or the spatial (grid) display.

Configuration

To enable the Time Series Lister, it must be added as explorertask <explorerTask> in Explorer.xml:

<explorerTask name="Timeseries Lister">
   <iconFile>tableInfo.jpg</iconFile>
   <taskClass>nl.wldelft.fews.gui.plugin.timeseriestableviewer.TimeSeriesTableViewer</taskClass>
   <toolbarTask>true</toolbarTask>
   <menubarTask>true</menubarTask>
   <allowMultipleInstances>false</allowMultipleInstances>
   <accelerator>ctrl T</accelerator>
</explorerTask>

Usage

The Time Series Lister enables the user users to inspect the database. The database Database records are visualised visualized as individual rows, which can be selected. When Once selected it , records can be browsed through (all columns) or its their values can be inspected through via a graph (scalar series) or the spatial display (grid data). 

In the top window, workflows are available. When a workflow is selected, the lower part of the screen shows the records which that have been written to the database in this selected workflow. In Individual rows in this lower part , individual rows can also be selected as well.All  All meta-information and statistics are calculated on-the-fly and are not stored. Within selections or filters (e.g., on start/end time), the content of the ( visible ) columns are is updated immediately. 

There are many columns which that can be viewed: general columns about module instance, location, parameter, disk space, and all kind kinds of relevant meta-information about the selected record(s).Besides  Besides the ' general ' metadata, the basic statistics of that row can be inspected. These basic statistics are include sum, average, maximum, minimum, etc. 

The remaining columns describe the quality of the data. If For example, if the user e.g. wants to know how many values are 'unreliable' and how many 'periods' of unreliable data are available, this information can be retrieved. The same is true for all kinds of combinations of doubtful, completed, and corrected data. This same functionality (number of records, periods) is available for primary and secondary validation results. This means that the user can inspect the number of records and periods of, e.g., hard maximums and , flag comparison, or series comparison. 

When many records (rows) are available, the user can filter the results. Double-clicking a cell will automatically filter for that value. If you want to filter on, e.g., a location, select the location (name or IdID) column and press F8 or double-click it. The background color of the cell will turn blue (meaning indicating there's a filter on it). This  This filter mechanism is applicable on to all available columns, including the Start and End Time. When the users user changes the start and/or end time, the visible columns will be updated accordingly.

Context Menu Options (lower table)

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figure Figure 2: context menu of the Time Series Lister

The Graphical User Interface contains a number of context menu options for selection/filtering and inspection of data. Right-click the mouse on one of the cells to access the context menu.

Special Filter option: Start time / End time

Two columns have special features: The the Start and End time Time columns can be used to increase or limit the view period. If you adjust these, all statistical columns or columns showing information about quality flags and (secondary) validation will be adjusted automatically.

Doubleclicking Double-clicking in these time columns will provide the user with the following, see additional options, as shown in the figure below.

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figure Figure 3: Special filter in the Start/End time columns

Meta Data Elements / Select Columns (F8)

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figure Figure 4: Selecting different columns (elements) in the Database ViewerTime Series Lister

The meta data elements are grouped as follows.

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The list of available columns can be adjusted by (un)selecting the individual elements. Only the selected ones will be visible in Database Viewer Time Series Lister after confirming by clicking <OK>.

Selections can be copied to the clipboard (<Copy Selection> button) and adjusted in a text editor (figure 5). These lists can be shared amongst users (e.g. e-mail). From a text editor you can adjust the list by removing rows, select the remaining rows and then copy it the clipboard (<CTRL+C>) again. After that use the <Paste Selection> button to update your selected columns (figure 6). See below:

figure Figure 5: Copying the selection of columns to clipboard

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figure Figure 6: Pasting the selection of columns from the clipboard

Delete module instance from Time Series Lister

It Database ViewerFrom build 2016.02 it is possible to remove module instances from Local Data Store via Database Vieweryour localDataStore via the Time Series Lister. This function only exists in a FEWS stand alone mode. The procedure is as follows:    

1. In Database ViewerTime Series Lister, select one workflow, press F12, a menu will pop out (figure 7).

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figure 7: F12 <F12> menu in Database ViewerTime Series Lister

2. Select '9 Delete module instance for selection', the module instances in this workflow will be displayed for selection. One can select the module instances that should be removed from the database.

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figure 8: select module instances to be removed from database

3. Press 'OK', the selected module instances will be removed. If all module instances in one workflow are all removed, the workflow will become empty, but the workflow still appears in the Database ViewerTime Series Lister.

To completely remove this workflow from the list, go to FEWS F12 menu (in log panel, press F12), select 'P database', select 'validate, repair, and compact datastore indices and cache files', then restart FEWS, the workflow will be completely removed. To completely remove the data from the localDataStore (i.e. reduce file size), press F12, select 'P database,' and select 'repair and defrag localdatastore'.

figure Figure 9: Remove workflow and data using F12 - P - database menu

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