SQLLint/SQLLinter/Infrastructure/Rules/ExcessiveJoinsRule.cs

using Microsoft.SqlServer.TransactSql.ScriptDom;
using SQLLinter.Common;

namespace SQLLinter.Infrastructure.Rules;

public class ExcessiveJoinsRule : BaseRuleVisitor
{
    public override string Text => "Слишком много таблиц в запросе (>" + _maxJoins + "): {0}";

    private const int _maxJoins = 10;

    public override void Visit(QuerySpecification node)
    {
        if (node.FromClause != null && node.FromClause.TableReferences.Count > _maxJoins)
        {
            AddViolation(node.FromClause, $"Количество таблиц: {node.FromClause.TableReferences.Count}");
        }
        base.Visit(node);
    }
}