/// <summary>
/// Composes a source query for a remote table
/// </summary>
/// <param name="table"></param>
/// <returns></returns>
public SourceTableQuery PrepareCopyRemoteTable(TableReference table)
{
// -- Load schema
var sm = this.GetSchemaManager(false);
var ds = sm.Datasets[table.DatasetName];
// Graywulf dataset has to be converted to prevent registry access
if (ds is GraywulfDataset)
{
ds = new SqlServerDataset(ds);
}
// --- Generate most restrictive query
// Find the query specification this table belongs to
var qs = ((TableSource)table.Node).QuerySpecification;
// Run the normalizer to convert where clause to a normal form
var cnr = new SearchConditionNormalizer();
cnr.NormalizeQuerySpecification(qs);
var cg = SqlCodeGeneratorFactory.CreateCodeGenerator(ds);
var sql = cg.GenerateMostRestrictiveTableQuery(table, true, 0);
return(new SourceTableQuery()
{
Dataset = ds,
Query = sql
});
}
protected void RenderTable()
{
var tableOrView = (schema::TableOrView)SchemaManager.GetDatabaseObjectByKey(Request.QueryString["objid"]);
var codegen = SqlCodeGeneratorFactory.CreateCodeGenerator(tableOrView.Dataset);
var sql = codegen.GenerateSelectStarQuery(tableOrView, 100);
DbProviderFactory dbf;
string cstr;
GetServerSettings(tableOrView.Dataset, out cstr, out dbf);
using (var cn = dbf.CreateConnection())
{
cn.ConnectionString = tableOrView.Dataset.ConnectionString;
cn.Open();
using (var cmd = cn.CreateCommand())
{
cmd.CommandText = sql;
cmd.CommandType = CommandType.Text;
using (var dr = cmd.ExecuteReader(CommandBehavior.SequentialAccess))
{
RenderTable(Response.Output, dr);
}
}
}
}
