internal UpdateChainer(Chainer prev, string alias)
: base(prev)
{
Query.SetUpdate(this);
alias = base.TryGetTableAlias(alias);
var aliasDelimited = Filter.Delimit(alias);
Build = (buildContext, buildArgs) =>
{
var sql = Text.GenerateSql(200);
var select = GetPrev <SelectChainer>();
TakeTop(select);
select.SkipBuild = true;
sql.NewLine(BuildTop(buildContext, buildArgs))
.Append(aliasDelimited).S();
var columnsObject = Prev.GetPrev <ColumnsChainer>();
columnsObject.Build(buildContext, buildArgs);
columnsObject.SkipBuild = true;
var values = ProcessValueArrayInliner(buildContext, buildArgs, select.Columns);
if (values == null)
{
values = select.Columns;
}
var columns = ProcessValueArrayInliner(buildContext, buildArgs, Columns);
if (columns == null)
{
columns = Columns;
}
sql.NewLine(Text.Set).S();
var i = 0;
foreach (var column in columns)
{
if (i > 0)
{
sql.NewLineIndent(Text.Comma).S();
}
sql.Append(aliasDelimited)
.Append(Text.Dot)
.Append(column.Build(buildContext, buildArgs))
.Append(Text._Equal_)
.Append(values[i].Build(buildContext, buildArgs)).S();
++i;
}
OutputChainer.TryAppendOutput(this, sql, buildContext, buildArgs);
return(sql.ToString());
};
}
private StringBuilder BuildHeader(BuildContext buildContext, BuildArgs buildArgs, Table table)
{
var sql = Text.GenerateSql(200);
sql.NewLine(BuildTop(buildContext, buildArgs))
.Append(table.Build(buildContext, buildArgs)).S();
Column[] columns = null;
var columnsObject = Prev.GetPrev <ColumnsChainer>();
if (columnsObject != null)
{
columnsObject.Build(buildContext, buildArgs);
// Do not build the ColumnsChainer object (it has been built already) .
// This is not actually not needed because the Query does not control ColumnsChainer object.
// However we set this flag here to make it clear and explicit.
columnsObject.SkipBuild = true;
// handle column inliner in .ColumnInto method passed as collection
columns = ProcessValueArrayInliner(buildContext, buildArgs, Columns);
}
if (columns == null)
{
columns = Columns;
}
// build inline columns
if (columns != null)
{
sql.NewLine(Text.LeftBracket);
int i = 0;
foreach (var column in columns)
{
CheckNull(Arg(() => column, column));
if (chainException != null)
{
chainException.Arguments = String.Format("{0} = null{1} columns = {2}",
chainException.Arguments, Environment.NewLine, ToString());
throw chainException;
}
if (i++ > 0)
{
sql.Append(Text.Comma).S();
}
sql.Append(column.Build(buildContext, buildArgs));
TryThrow(buildContext);
}
sql.Append(Text.RightBracket)
.TrimEnd();
}
OutputChainer.TryAppendOutput(this, sql, buildContext, buildArgs);
return(sql);
}
