/// <summary>
/// Execute an Explain or Explain Query Plan on the SQL Statement and show the results.
/// </summary>
/// <param name="ExplainPlan">true- Execute 'Explain', false - Execute 'Explain Query Plan'</param>
internal void Explain(bool ExplainPlan)
{
string sql = GetSQL();
if (string.IsNullOrEmpty(sql))
{
return;
}
toolStripResult.Text = string.Empty;
toolStripRowCount.Text = string.Empty;
toolStripClock.Text = string.Empty;
Int64 startclock = Timers.QueryPerformanceCounter();
sql = ExplainPlan ? string.Format("Explain {0}", sql) : string.Format("Explain Query Plan {0}", sql);
DataTable dt = DataAccess.ExecuteDataTable(DatabaseName, sql, out SQLiteErrorCode returnCode);
if (returnCode == SQLiteErrorCode.Ok)
{
gvResults.DataSource = dt;
gvResults.Refresh();
gvResults.Visible = true;
txtSqlResults.Visible = false;
toolStripResult.Text = Common.OK_EXPLAIN;
}
else
{
gvResults.Visible = false;
txtSqlResults.Visible = true;
txtSqlResults.Text = string.Format(Common.ERR_EXPLAIN, DataAccess.LastError, returnCode.ToString());
toolStripResult.Text = Common.ERR_EXPLAINERR;
}
toolStripClock.Text = Timers.DisplayTime(Timers.QueryLapsedTime(startclock));
return;
}
internal void ProgressEventHandler(object sender, ProgressEventArgs e)
{
e.ReturnCode = CancelExecution ? SQLiteProgressReturnCode.Interrupt : SQLiteProgressReturnCode.Continue;
toolStripClock.Text = Timers.DisplayTime(Timers.QueryLapsedTime(startclock));
Application.DoEvents();
}
