private async Task ExecuteExplainPlanAsyncInternal(StatementExecutionModel executionModel)
{
InitializeCommon();
var actionResult = await SafeTimedActionAsync(() => ExecutionPlanViewer.ExplainAsync(executionModel, _statementExecutionCancellationTokenSource.Token));
if (_statementExecutionCancellationTokenSource.Token.IsCancellationRequested)
{
NotifyExecutionCanceled();
}
else
{
UpdateTimerMessage(actionResult.Elapsed, false);
if (actionResult.IsSuccessful)
{
ShowExecutionPlan();
}
else
{
var errorMessage = Messages.GetExceptionErrorMessage(actionResult.Exception);
AddExecutionLog(actionResult.ExecutedAt, $"Explain plain failed: {errorMessage}");
Messages.ShowError(errorMessage);
}
}
}
public static void Generate(StatementExecutionModel statementModel, IReadOnlyList <ColumnHeader> columnHeaders, TextWriter writer)
{
var columnMapBuilder = new StringBuilder();
var resultRowPropertyBuilder = new StringBuilder();
var bindVariableBuilder = new StringBuilder();
var parameterBuilder = new StringBuilder();
var index = 0;
if (statementModel.BindVariables.Count > 0)
{
parameterBuilder.AppendLine();
foreach (var bindVariable in statementModel.BindVariables)
{
index++;
bindVariableBuilder.Append(bindVariable.InputType.Name);
bindVariableBuilder.Append(" ");
bindVariableBuilder.Append(bindVariable.Name);
if (index < statementModel.BindVariables.Count)
{
bindVariableBuilder.Append(", ");
}
var parameterName = $"parameter{bindVariable.Name}";
parameterBuilder.Append("\t\t\tvar ");
parameterBuilder.Append(parameterName);
parameterBuilder.AppendLine(" = command.CreateParameter();");
parameterBuilder.Append("\t\t\t");
parameterBuilder.Append(parameterName);
parameterBuilder.Append(".Value = ");
parameterBuilder.Append(bindVariable.Name);
parameterBuilder.AppendLine(";");
parameterBuilder.Append("\t\t\tcommand.Parameters.Add(");
parameterBuilder.Append(parameterName);
parameterBuilder.AppendLine(");");
parameterBuilder.AppendLine();
}
}
index = 0;
foreach (var column in columnHeaders)
{
index++;
var dataTypeName = String.Equals(column.DataType.Namespace, "System")
? column.DataType.Name
: column.DataType.FullName;
if (column.DataType.IsValueType)
{
dataTypeName = $"{dataTypeName}?";
}
columnMapBuilder.Append("\t\t\t\t\t\t\t");
columnMapBuilder.Append(column.Name);
columnMapBuilder.Append(" = GetReaderValue<");
columnMapBuilder.Append(dataTypeName);
columnMapBuilder.Append(">(reader[nameof(ResultRow.");
columnMapBuilder.Append(column.Name);
columnMapBuilder.Append(")])");
if (index < columnHeaders.Count)
{
columnMapBuilder.AppendLine(",");
}
resultRowPropertyBuilder.Append("\tpublic ");
resultRowPropertyBuilder.Append(dataTypeName);
resultRowPropertyBuilder.Append(" ");
resultRowPropertyBuilder.Append(column.Name);
resultRowPropertyBuilder.AppendLine(" { get; set; }");
}
var statementText = statementModel.StatementText.Replace("\"", "\"\"");
var queryClass = String.Format(ExportClassTemplate, statementText, bindVariableBuilder, parameterBuilder, columnMapBuilder);
writer.WriteLine(queryClass);
writer.WriteLine("public class ResultRow");
writer.WriteLine("{");
writer.Write(resultRowPropertyBuilder);
writer.WriteLine("}");
}
private async Task BuildParentRecordDataGrid(Panel container, string objectName, StatementExecutionModel executionModel, CancellationToken cancellationToken)
{
var executionResult = await _connectionAdapter.ExecuteChildStatementAsync(executionModel, cancellationToken);
await _statementValidator.ApplyReferenceConstraintsAsync(executionResult, _connectionAdapter.DatabaseModel, cancellationToken);
var resultInfo = executionResult.ResultInfoColumnHeaders.Keys.Last();
var resultSet = await _connectionAdapter.FetchRecordsAsync(resultInfo, ConfigurationProvider.Configuration.ResultGrid.FetchRowsBatchSize, cancellationToken);
if (resultSet.Count == 0)
{
container.Children.Add(new TextBlock {
Text = "Record not found. "
});
return;
}
var firstRow = resultSet[0];
var columnHeaders = executionResult.ResultInfoColumnHeaders.Values.Last();
var columnValues = columnHeaders.Select(
(t, i) => new CustomTypeAttributeValue
{
ColumnHeader = t,
Value = firstRow[i]
}).ToArray();
var referenceDataGrid =
new DataGrid
{
Style = (Style)Application.Current.Resources["ResultSetDataGrid"],
RowHeaderWidth = 0,
CanUserReorderColumns = false,
ItemsSource = columnValues,
CanUserSortColumns = true
};
referenceDataGrid.BeginningEdit += App.DataGridBeginningEditCancelTextInputHandlerImplementation;
referenceDataGrid.Sorting += (sender, args) => args.Handled = args.Column.DisplayIndex != 0;
referenceDataGrid.MouseDoubleClick += ReferenceDataGridOnMouseDoubleClickHandler;
var columnNameTemplate =
new DataGridTextColumn
{
Header = "Column name",
Binding = new Binding("ColumnHeader.Name"),
HeaderStyle = (Style)Application.Current.Resources["ColumnHeaderClickBubbleCancelation"],
ElementStyle = (Style)Application.Current.Resources["SingleRecordColumnName"],
CellStyle = (Style)Application.Current.Resources["SingleRecordCell"],
EditingElementStyle = (Style)Application.Current.Resources["EditingCellTextBox"]
};
referenceDataGrid.Columns.Add(columnNameTemplate);
var columnHyperlinkValueTemplate =
new DataGridTemplateColumn
{
Header = ValueProperty,
HeaderStyle = (Style)Application.Current.Resources["ColumnHeaderClickBubbleCancelation"],
CellTemplateSelector = new SingleRowDataTemplateSelector(_statementValidator, _connectionAdapter),
CellEditingTemplate = EditingTemplate,
ClipboardContentBinding = new Binding(ValueProperty)
{
Converter = CellValueConverter.Instance
}
};
referenceDataGrid.Columns.Add(columnHyperlinkValueTemplate);
var textBlock = new TextBlock {
Text = $"Source: {objectName}", Margin = DataGridHelper.DefaultTextBlockMargin, HorizontalAlignment = HorizontalAlignment.Left
};
container.Children.Add(textBlock);
container.Children.Add(referenceDataGrid);
}
public Task ExecuteExplainPlanAsync(StatementExecutionModel executionModel)
{
return(ExecuteUsingCancellationToken(t => ExecuteExplainPlanAsyncInternal(executionModel)));
}
