protected virtual ValueTask <QsiTableStructure> BuildInlineDerivedTableStructure(TableCompileContext context, IQsiInlineDerivedTableNode table)
{
context.ThrowIfCancellationRequested();
var alias = table.Alias?.Name;
if (alias == null &&
table.Parent is IQsiDerivedColumnNode &&
!context.Options.AllowNoAliasInDerivedTable)
{
throw new QsiException(QsiError.NoAlias);
}
var declaredTable = new QsiTableStructure
{
Type = QsiTableType.Inline,
Identifier = alias == null ? null : new QsiQualifiedIdentifier(alias)
};
int?columnCount = null;
switch (table.Columns)
{
case null:
case var cd when cd.All(c => c is IQsiAllColumnNode { Path: null } all) :
// Skip
break;
case var cd when cd.TryCast(out IQsiSequentialColumnNode[] sequentialColumns):
foreach (var column in sequentialColumns)
{
var c = declaredTable.NewColumn();
c.Name = column.Alias.Name;
}
columnCount = sequentialColumns.Length;
break;
default:
throw new NotSupportedException("Not supported columns in inline derived table.");
}
// Skip trace columns in expression.
// Because don't know the possibility of declaring a referenceable column in the expression.
// ISSUE: row.ColumnValues
foreach (var row in table.Rows ?? Enumerable.Empty <IQsiRowValueExpressionNode>())
{
if (!columnCount.HasValue)
{
columnCount = row.ColumnValues.Length;
}
else if (columnCount != row.ColumnValues.Length)
{
throw new QsiException(QsiError.DifferentColumnsCount);
}
}
if ((columnCount ?? 0) == 0)
{
if (!context.Options.AllowEmptyColumnsInInline)
{
throw new QsiException(QsiError.NoColumnsSpecified, alias);
}
columnCount = 0;
}
if (declaredTable.Columns.Count != columnCount)
{
for (int i = 0; i < columnCount; i++)
{
declaredTable.NewColumn();
}
}
return(new ValueTask <QsiTableStructure>(declaredTable));
}
protected virtual ValueTask <QsiTableStructure> BuildInlineDerivedTableStructure(TableCompileContext context, IQsiInlineDerivedTableNode table)
{
context.ThrowIfCancellationRequested();
var alias = table.Alias?.Name;
if (alias == null &&
table.Parent is IQsiDerivedColumnNode &&
!context.Options.AllowNoAliasInDerivedTable)
{
throw new QsiException(QsiError.NoAlias);
}
var declaredTable = new QsiTableStructure
{
Type = QsiTableType.Inline,
Identifier = alias == null ? null : new QsiQualifiedIdentifier(alias)
};
int?columnCount = null;
switch (table.Columns)
{
case null:
case var cd when cd.All(c => c is IQsiAllColumnNode {
Path: null
}) :
// Skip
break;