protected virtual Expression VisitDelete(DbDeleteCommand delete)
{
var table = this.Visit(delete.Table) as DbTableExpression;
var where = this.Visit(delete.Where);
return(this.UpdateDelete(delete, table, where));
}
protected DbDeleteCommand UpdateDelete(DbDeleteCommand delete, DbTableExpression table, Expression where)
{
if (table != delete.Table || where != delete.Where)
{
return(new DbDeleteCommand(table, where));
}
return(delete);
}
protected override Expression VisitDelete(DbDeleteCommand delete)
{
this.Write("DELETE FROM ");
var saveHideTable = this.HideTableAliases;
var saveHideColumn = this.HideColumnAliases;
this.HideTableAliases = true;
this.HideColumnAliases = true;
this.VisitSource(delete.Table);
if (delete.Where != null)
{
this.WriteLine(Indentation.Same);
this.Write("WHERE ");
this.VisitPredicate(delete.Where);
}
this.HideTableAliases = saveHideTable;
this.HideColumnAliases = saveHideColumn;
return(delete);
}
protected virtual bool CompareDelete(DbDeleteCommand x, DbDeleteCommand y)
{
return(this.Compare(x.Table, y.Table) && this.Compare(x.Where, y.Where));
}
protected override Expression VisitDelete(DbDeleteCommand delete)
{
return(this.BuildExecuteCommand(delete));
}