public static IQsiTreeNode VisitUpdateStmt(Update_stmtContext context)
{
var node = ImpalaTree.CreateWithSpan <QsiDataUpdateActionNode>(context);
var wildcard = new QsiAllColumnNode();
var targetTable = new QsiDerivedTableNode
{
Columns =
{
Value = new QsiColumnsDeclarationNode
{
Columns =
{
wildcard
}
}
}
};
if (context.from is not null)
{
if (context.target.children.Count != 1)
{
throw new QsiException(QsiError.SyntaxError, $"'{context.target.GetInputText()}' is not a valid table alias or reference.");
}
wildcard.Path = IdentifierVisitor.VisitDottedPath(context.target);
targetTable.Source.Value = TableVisitor.VisitFromClause(context.from);
}
else
{
targetTable.Source.Value = TableVisitor.VisitDottedPath(context.target);
}
if (context.where is not null)
{
targetTable.Where.Value = ExpressionVisitor.VisitWhereClause(context.where);
}
node.Target.Value = targetTable;
node.SetValues.AddRange(ExpressionVisitor.VisitUpdateSetExprList(context.values));
return(node);
}
