Issues

• Dkernel.c ssl_server_init hangs with FIPS enabled

  openlink/virtuoso-opensource#1476 · Filter by author jgager opened on Sep 11, 2026

• Sparql query with accept 'Accept: application/sparql-results+json' throws 406 on Max Silicon

  openlink/virtuoso-opensource#1475 · Filter by author dwintergruen opened on Sep 9, 2026
  1

• virtodbc.so: a column-wise SQL_C_TYPE_DATE parameter array is stepped by SQLBindParameter's ColumnSize rather than by sizeof(SQL_DATE_STRUCT) — ColumnSize 0 inserts row 0's date into every row, other values insert garbage dates, all with SQL_SUCCESS

  openlink/virtuoso-opensource#1473 · Filter by author singhpratech opened on Aug 29, 2026

• virtodbc.so: SQL_C_SBIGINT parameters store 0 and SQL_C_SBIGINT fetches return indicator 0 with the buffer untouched, silently; SQL_C_SLONG parameters are read as 8 bytes regardless of BufferLength

  openlink/virtuoso-opensource#1472 · Filter by author singhpratech opened on Aug 29, 2026

• virtodbc.so: Charset=<any value but the exact literal UTF-8> aborts the process inside SQLDriverConnect ("GPF: Dkbox.c:638 Double free", SIGSEGV), including every charset Virtuoso itself lists; Charset=UTF-8 connects but returns wide columns doubly encoded

  openlink/virtuoso-opensource#1471 · Filter by author singhpratech opened on Aug 29, 2026

• virtodbc.so (Linux, unixODBC): SQL_C_WCHAR parameters and fetches use 4-byte wchar_t units, not the 2-byte SQLWCHAR the driver manager defines — "hello" stores as "??", "héllo 🚀" as "0", no diagnostic

  openlink/virtuoso-opensource#1470 · Filter by author singhpratech opened on Aug 29, 2026
  5

• macOS ODBC driver (Homebrew 7.2.17) is built to iODBC's 4-byte SQLWCHAR, undocumented — process aborts on the first SQL error under unixODBC

  openlink/virtuoso-opensource#1469 · Filter by author singhpratech opened on Aug 25, 2026
  2

• Redundant DISTINCT in an IN subquery avoids an expensive execution path

  enhancement
  openlink/virtuoso-opensource#1462 · Filter by author chen8908917 opened on Aug 15, 2026

• Clarification request: ORDER BY scope in a parenthesized EXCEPT operand

  openlink/virtuoso-opensource#1456 · Filter by author chen8908917 opened on Aug 15, 2026

• SQ155 optimized compiler error with JOIN and nested IN subquery

  openlink/virtuoso-opensource#1452 · Filter by author chen8908917 opened on Aug 15, 2026
  2

• EXCEPT against a known-empty table is not simplified

  enhancement
  openlink/virtuoso-opensource#1451 · Filter by author chen8908917 opened on Aug 15, 2026

• Redundant HAVING COUNT(*) > 0 predicate is retained

  enhancement
  openlink/virtuoso-opensource#1450 · Filter by author chen8908917 opened on Aug 15, 2026

• OR FALSE is not folded and prevents access-predicate use

  enhancement
  openlink/virtuoso-opensource#1449 · Filter by author chen8908917 opened on Aug 15, 2026

• TOP 0 with a constant-false HAVING clause does not eliminate aggregation

  enhancement
  openlink/virtuoso-opensource#1448 · Filter by author chen8908917 opened on Aug 15, 2026

• TOP 0 with a constant-false join condition does not eliminate the join

  enhancement
  openlink/virtuoso-opensource#1447 · Filter by author chen8908917 opened on Aug 15, 2026

• TOP 0 with a constant-false WHERE clause does not eliminate the scan

  enhancement
  openlink/virtuoso-opensource#1446 · Filter by author chen8908917 opened on Aug 15, 2026

• Double negation prevents predicate pushdown

  enhancement
  openlink/virtuoso-opensource#1445 · Filter by author chen8908917 opened on Aug 15, 2026

• Boolean absorption expression is retained as a local test

  enhancement
  openlink/virtuoso-opensource#1444 · Filter by author chen8908917 opened on Aug 15, 2026

• Outer DISTINCT over a distinct UNION is not removed

  enhancement
  openlink/virtuoso-opensource#1443 · Filter by author chen8908917 opened on Aug 15, 2026

• Range predicate is not propagated through join equality

  enhancement
  openlink/virtuoso-opensource#1442 · Filter by author chen8908917 opened on Aug 15, 2026

• Redundant DISTINCT is not eliminated for a primary-key projection

  enhancement
  openlink/virtuoso-opensource#1441 · Filter by author chen8908917 opened on Aug 15, 2026

• Known-true EXISTS subquery is not folded to TRUE

  enhancement
  openlink/virtuoso-opensource#1440 · Filter by author chen8908917 opened on Aug 15, 2026

• Equivalent LEFT JOIN NOT BETWEEN predicate forms return different counts

  openlink/virtuoso-opensource#1436 · Filter by author 123lpygithub opened on Aug 4, 2026
  2

• Additional issues with EXISTS in FILTER

  openlink/virtuoso-opensource#1413 · Filter by author jakubklimek opened on Apr 24, 2026
  1

• Filtering for results of 3 EXISTS unreasonably slows down query

  openlink/virtuoso-opensource#1412 · Filter by author jakubklimek opened on Apr 24, 2026
  1