public override object VisitGroupby_clause([NotNull] SqlParser.Groupby_clauseContext context)
{
var groupby = new GroupbyClause();
if (context.expr() != null && context.expr().Length > 0)
{
groupby.Columns = new List <ColumnExpression>();
foreach (var expr in context.expr())
{
var columnExpression = VisitExpr(expr) as ColumnExpression;
if (columnExpression == null)
{
throw new SQLParseException("Only column could be set in Group by clause.");
}
groupby.Columns.Add(columnExpression);
}
}
if (context.having_clause() != null)
{
groupby.Having = (IExpression)VisitExpr(context.having_clause().expr());
}
return(groupby);
}
/// <summary>
/// Visit a parse tree produced by <see cref="SqlParser.groupby_clause"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitGroupby_clause([NotNull] SqlParser.Groupby_clauseContext context)
{
return(VisitChildren(context));
}
