public static QsiDataDeleteActionNode VisitDeleteStatement(DeleteStatementContext context)
{
var partitionRestriction = context.partitionRestriction();
var whereClause = context.whereClause();
var hintClause = context.hintClause();
QsiTableNode tableNode = new HanaTableReferenceNode
{
Identifier = context.tableName().qqi
};
if (partitionRestriction != null)
{
((HanaTableReferenceNode)tableNode).Partition.Value = TreeHelper.Fragment(partitionRestriction.GetInputText());
}
if (whereClause != null || hintClause != null)
{
var derivedTableNode = new HanaDerivedTableNode
{
Columns = { Value = TreeHelper.CreateAllColumnsDeclaration() },
Source = { Value = tableNode }
};
if (whereClause != null)
{
derivedTableNode.Where.Value = ExpressionVisitor.VisitWhereClause(whereClause);
}
if (hintClause != null)
{
derivedTableNode.Hint.Value = TreeHelper.Fragment(hintClause.GetInputText());
}
tableNode = derivedTableNode;
}
var node = new QsiDataDeleteActionNode
{
Target = { Value = tableNode }
};
HanaTree.PutContextSpan(node, context);
return(node);
}
public static QsiTableNode VisitSelectStatement(SelectStatementContext context)
{
var withClause = context.withClause();
var subquery = context.subquery();
var forClause = context.forClause();
var timeTravel = context.timeTravel();
var hintClause = context.hintClause();
var subqueryNode = VisitSubquery(subquery);
if (withClause is null && forClause is null && timeTravel is null && hintClause is null)
{
return(subqueryNode);
}
if (subqueryNode is not HanaDerivedTableNode derivedTableNode)
{
derivedTableNode = new HanaDerivedTableNode
{
Columns = { Value = TreeHelper.CreateAllColumnsDeclaration() },
Source = { Value = subqueryNode }
};
}
if (withClause is not null)
{
derivedTableNode.Directives.SetValue(VisitWithClause(withClause));
}
if (forClause is not null)
{
derivedTableNode.Behavior.SetValue(VisitForClause(forClause));
}
if (timeTravel is not null)
{
derivedTableNode.TimeTravel.SetValue(TreeHelper.Fragment(timeTravel.GetInputText()));
}
if (hintClause is not null)
{
derivedTableNode.Hint.SetValue(TreeHelper.Fragment(hintClause.GetInputText()));
}
return(derivedTableNode);
}
