Query optimization from DL/1 (IMS) to sol

• Published in: PROBLEMS IN PROGRAMMING
• Date: 2026
• Issue: 2-3
• Pages: 376-381
• ISSN: 1727-4907
• Author Affiliations: A.V. Anisimov — Kiev Taras Shevchenko National University; O.P. Kulyabko — Kiev Taras Shevchenko National University; P.P. Kulyabko — Kiev Taras Shevchenko National University; O.O. Marchenko — Kiev Taras Shevchenko National University
• Keywords: sql- запит, nosql, мова запиту dgql, newsql, ве- рифікація даних, реляційні бази даних, exec sql та end-exec, ids-системи, база даних, міграція даних
• Main Authors: Anisimov, A.V., Kulyabko, O.P., Kulyabko, P.P., Marchenko, O.O.
• Format: Article
• Language: Ukrainian
• Published: PROBLEMS IN PROGRAMMING 2026
• Subjects: UDC 681.3.06
• Online Access: https://pp.isofts.kiev.ua/index.php/ojs1/article/view/925
• Journal Title: Problems in programming

The programming language DL/1 (DBMS IMS) has significantly lower level than SQL-language, but many technologies consider that in migration process each DL/1-statement is changed with exactly one SQL-statement. However sometimes one SQL-statement can be put instead of sequence of DLI-statements. Last...