public TableExpression GetTableOrView( string schemaName, string name, Exec e )
{
Schema schema = GetSchema( schemaName, true, e );
TableExpression result = schema.GetCachedTable( name );
if ( result != null ) return result;
bool isView; string definition;
long tid = ReadTableId( schema, name, out isView, out definition );
if ( tid < 0 ) e.Error( schemaName + "." + name + " not found" );
if ( isView )
{
TableExpression te = e.LoadView( definition, schemaName + "." + name );
te.TableId = tid;
schema.TableDict[ name ] = te;
return te;
}
else
{
// Fetch the Column Information from the SysColumn table.
var names = new G.List<string>();
var types = new G.List<DataType>();
names.Add( "Id" ); types.Add( DataType.Bigint ); // Add the pre-defined "id" column.
// Use SysColumnIndex to avoid scanning the entire SysColumn table.
var start = new LongStart( tid );
var r = new RowCursor( SysColumn );
foreach( IndexFileRecord ixr in SysColumnIndex.From( start.Compare, false ) )
{
if ( ixr.Col[0].L == tid )
{
r.Get( ixr.Col[1].L );
names.Add( (string) r.V[2]._O );
types.Add( (DataType)r.V[3].L );
}
else break;
}
Table t = new Table( this, schema, name, ColInfo.New(names,types), tid );
t.OpenIndexes();
return t;
}
}
public IndexInfo [] ReadIndexes( long tableId )
{
var ix = new G.List<IndexInfo>();
var r = new RowCursor( SysIndexCol );
long CurIx = 0;
int IxNum = 0;
// Use SysIndexColIndex to avoid scanning the entire SysIndexCol table.
var start = new LongStart( tableId );
foreach( IndexFileRecord ixr in SysIndexColIndex.From( start.Compare, false ) )
{
if ( ixr.Col[0].L == tableId )
{
r.Get( ixr.Col[1].L );
var ii = new IndexInfo();
ii.IndexId = r.V[2].L;
if ( ii.IndexId != CurIx ) { IxNum = 0; CurIx = ii.IndexId; }
ii.IxNum = IxNum++;
ii.ColIx = (int)r.V[3].L;
ix.Add( ii );
} else break;
}
return ix.ToArray();
}