public void PrepareComputeTableStatistics(Context context, TableReference tr, out string connectionString, out string sql)
{
// Assign a database server to the query
// TODO: maybe make this function generic
// TODO: check this part to use appropriate server and database
var sm = GetSchemaManager(false);
var ds = sm.Datasets[tr.DatasetName];
if (ds is GraywulfDataset && !((GraywulfDataset)ds).IsSpecificInstanceRequired)
{
var gds = (GraywulfDataset)ds;
var dd = new DatabaseDefinition(context);
dd.Guid = gds.DatabaseDefinition.Guid;
dd.Load();
// Get a server from the scheduler
var si = new ServerInstance(Context);
si.Guid = Scheduler.GetNextServerInstance(new Guid[] { dd.Guid }, StatDatabaseVersionName, null);
si.Load();
connectionString = si.GetConnectionString().ConnectionString;
SubstituteDatabaseName(tr, si.Guid, StatDatabaseVersionName);
tr.DatabaseObject = null;
}
else
{
// Run it on the specific database
connectionString = ds.ConnectionString;
}
// Generate statistics query
sql = CodeGenerator.GenerateTableStatisticsQuery(tr);
}