public static QsiColumnNode VisitColumnParseNode(ColumnParseNode node)
{
var columnNode = new QsiColumnReferenceNode
{
Name = IdentifierVisitor.Visit(node)
};
PTree.RawNode[columnNode] = node;
return(columnNode);
}
public QsiColumnNode VisitSelectScalarExpression(SelectScalarExpression selectScalarExpression)
{
QsiExpressionNode expression = null;
QsiColumnReferenceNode column = null;
if (selectScalarExpression.Expression is ColumnReferenceExpression columnReferenceExpression)
{
column = new QsiColumnReferenceNode
{
Name = IdentifierVisitor.CreateQualifiedIdentifier(columnReferenceExpression.MultiPartIdentifier)
};
if (selectScalarExpression.ColumnName == null)
{
SqlServerTree.PutFragmentSpan(column, selectScalarExpression);
return(column);
}
}
else
{
expression = ExpressionVisitor.VisitScalarExpression(selectScalarExpression.Expression);
}
return(TreeHelper.Create <QsiDerivedColumnNode>(n =>
{
if (column != null)
{
n.Column.SetValue(column);
}
else if (expression != null)
{
n.Expression.SetValue(expression);
}
var columnName = selectScalarExpression.ColumnName;
if (columnName != null)
{
if (columnName.Identifier == null)
{
n.Alias.SetValue(new QsiAliasNode
{
Name = new QsiIdentifier(columnName.Value, false)
});
}
else
{
n.Alias.SetValue(CreateAliasNode(columnName.Identifier));
}
}
SqlServerTree.PutFragmentSpan(n, selectScalarExpression);
}));
}
public QsiActionNode VisitInsertSpecificiation(InsertSpecification insertSpecification)
{
var node = new QsiDataInsertActionNode();
var tableNode = TableVisitor.VisitTableReference(insertSpecification.Target);
if (tableNode is not QsiTableReferenceNode tableReferenceNode)
{
throw new QsiException(QsiError.Syntax);
}
node.Target.SetValue(tableReferenceNode);
if (!ListUtility.IsNullOrEmpty(insertSpecification.Columns))
{
node.Columns = insertSpecification.Columns
.Select(ExpressionVisitor.VisitColumnReferenceExpression)
.Select(c => c.Column.Value switch
{
QsiColumnReferenceNode columnReferenceNode => columnReferenceNode.Name,
QsiAllColumnNode allColumnNode => allColumnNode.Path,
_ => throw new QsiException(QsiError.Syntax)
})
public SelectorPair(QsiColumnReferenceNode column)
{
Column = column;
Expression = null;
}
