public virtual EntityMaterializer CreateEntityMaterializer(DbTableInfo table, IList <DbColumnInfo> columns)
{
var matzr = new EntityMaterializer(table);
foreach (var col in columns)
{
matzr.AddColumn(col);
}
return(matzr);
}
// RI: new stuff, optimized entity reader
protected virtual Expression GetOutputTableReader(TableExpression tableExpression,
ParameterExpression dataRecordParameter, ParameterExpression sessionParameter,
TranslationContext context)
{
// Note: we have to create materializer each time, because column indexes in output can change from query to query
var entMatzer = new EntityMaterializer(tableExpression.TableInfo);
var allColExprs = RegisterAllColumns(tableExpression, context);
foreach (var col in allColExprs)
{
var colIndex = RegisterOutputValue(col, context);
entMatzer.AddColumn(col.ColumnInfo, colIndex);
}
var entMatzerConst = Expression.Constant(entMatzer);
var callReadEntity = Expression.Call(entMatzerConst, EntityMaterializer.ReadMethodInfo, dataRecordParameter, sessionParameter);
var convExpr = Expression.Convert(callReadEntity, tableExpression.Type);
return(convExpr);
}