Dashing.Engine.Dialects.SqlServerDialect.CreateIndex C# (CSharp) Méthode

        public override string CreateIndex(Index index) {
            var statement = base.CreateIndex(index);
            if (index.IsUnique && index.Columns.Any(c => c.IsNullable)) {
                var whereClause = new StringBuilder();
                whereClause.Append(" where ");
                bool first = true;
                foreach (var column in index.Columns.Where(c => c.IsNullable)) {
                    if (!first) {
                        whereClause.Append(" and ");
                    }

                    this.AppendQuotedName(whereClause, column.DbName);
                    whereClause.Append(" is not null");
                    first = false;
                }
                statement += whereClause.ToString();
            }

            return statement;
        }