Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

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  • Add string concatenation
    Open

    Difficulty 2/5 1-3 hours Newbie friendliness 65/100

    RhyOrg/RhyDB#1737 ·

    Maintainers usually reply within 1 day

  • Implement `ScalarExpression::toArrowExpression` for all scalar expressions
    Open

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    RhyOrg/RhyDB#1722 ·

    Maintainers usually reply within 1 day

  • Correctly scope `group` key expressions
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 22/100

    RhyOrg/RhyDB#1696 ·

    Maintainers usually reply within 1 day

  • Get mutations per sequence
    Open

    Difficulty 5/5 Over a week Newbie friendliness 28/100

    RhyOrg/RhyDB#1626 · 1 comment ·

    Maintainers usually reply within 1 day

  • SaneQL: missing operators/constructs from the paper
    Open
    epic

    Difficulty 5/5 Over a week Newbie friendliness 28/100

    RhyOrg/RhyDB#1613 ·

    Maintainers usually reply within 1 day

  • Remove `sequence_count` (and others?) from `/info` result
    Open

    Difficulty 5/5 Over a week Newbie friendliness 28/100

    RhyOrg/RhyDB#1612 · 1 comment · 1 reaction ·

    Maintainers usually reply within 1 day

  • Allow correlated subqueries
    Open

    Difficulty 5/5 Over a week Newbie friendliness 22/100

    RhyOrg/RhyDB#1606 ·

    Maintainers usually reply within 1 day

  • Add subtraction function `-`
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 62/100

    RhyOrg/RhyDB#1604 ·

    Maintainers usually reply within 1 day

  • Add addition function `+`
    Open

    Difficulty 4/5 1-2 days Newbie friendliness 48/100

    RhyOrg/RhyDB#1603 ·

    Maintainers usually reply within 1 day

  • Add `extractYear` function
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 38/100

    RhyOrg/RhyDB#1602 ·

    Maintainers usually reply within 1 day

  • Add `slice` functionality
    Open

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    RhyOrg/RhyDB#1601 ·

    Maintainers usually reply within 1 day

  • Add `x[a..b]` short-hand notation
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 52/100

    RhyOrg/RhyDB#1600 ·

    Maintainers usually reply within 1 day

  • Add a `slice` function
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 38/100

    RhyOrg/RhyDB#1599 · 1 comment ·

    Maintainers usually reply within 1 day

  • Add a natural join
    Open
    good first issue

    Difficulty 4/5 3-5 days Newbie friendliness 38/100

    RhyOrg/RhyDB#1598 ·

    Maintainers usually reply within 1 day

  • Add `structPack` function and `struct` type in query engine
    Open
    good first issue

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    RhyOrg/RhyDB#1597 ·

    Maintainers usually reply within 1 day

  • Introduce identifiable units
    Open

    Difficulty 5/5 Over a week Newbie friendliness 22/100

    RhyOrg/RhyDB#1596 ·

    Maintainers usually reply within 1 day

  • Efficient `in()` filter for non-indexed columns
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    RhyOrg/RhyDB#1585 ·

    Maintainers usually reply within 1 day

  • Add `avg` aggregation function
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 28/100

    RhyOrg/RhyDB#1583 ·

    Maintainers usually reply within 1 day

  • Unit test aggregation across chunks
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 52/100

    RhyOrg/RhyDB#1574 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Constant maps should be detected to be executed after groupBy
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    RhyOrg/RhyDB#1548 ·

    Maintainers usually reply within 1 day

  • Allow CORS
    Open
    good first issue

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    RhyOrg/RhyDB#1540 · 1 comment ·

    Maintainers usually reply within 1 day

  • Better guard `insertInto` for cyclic updates
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 32/100

    RhyOrg/RhyDB#1537 · 1 comment ·

    Maintainers usually reply within 1 day

  • Windows binary
    Open

    Difficulty 5/5 Over a week Newbie friendliness 28/100

    RhyOrg/RhyDB#1528 · 1 comment ·

    Maintainers usually reply within 1 day

  • Inconsistent null semantics: negation of equals disagrees with unequals
    Open
    bug

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    RhyOrg/RhyDB#1525 · 1 comment ·

    Maintainers usually reply within 1 day

  • Move data manipulation APIs to query interface
    Open

    Difficulty 5/5 Over a week Newbie friendliness 28/100

    RhyOrg/RhyDB#1467 ·

    Maintainers usually reply within 1 day

  • Enable dictionary-encoded columns with data-type `date32`
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 32/100

    RhyOrg/RhyDB#1463 ·

    Maintainers usually reply within 1 day

  • Fold map expressions into filter
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    RhyOrg/RhyDB#1433 ·

    Maintainers usually reply within 1 day

  • Remove `randomize` logic from orderBy
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    RhyOrg/RhyDB#1419 ·

    Maintainers usually reply within 1 day

  • `make clean` should clean builds
    Open

    Difficulty 3/5 Half a day Newbie friendliness 52/100

    RhyOrg/RhyDB#1418 ·

    Maintainers usually reply within 1 day

  • Rename `query_engine/operators` and `query_engine/exec_node`
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    RhyOrg/RhyDB#1416 ·

    Maintainers usually reply within 1 day

  • Replace `fmt::format` with `std::format`
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    RhyOrg/RhyDB#1394 ·

    Maintainers usually reply within 1 day

  • Add let-expressions
    Open

    Difficulty 5/5 Over a week Newbie friendliness 22/100

    RhyOrg/RhyDB#1382 · 2 comments · 1 reaction ·

    Maintainers usually reply within 1 day

  • Allow sequence batches to stream through query engine
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 32/100

    RhyOrg/RhyDB#1381 ·

    Maintainers usually reply within 1 day

  • Add table literal to query language
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    RhyOrg/RhyDB#1380 ·

    Maintainers usually reply within 1 day

  • `silo_app_test` should not use `src/main.test.cpp`
    Open

    Difficulty 2/5 1-3 hours Newbie friendliness 68/100

    RhyOrg/RhyDB#1365 ·

    Maintainers usually reply within 1 day

  • Add mutationProfile distance result
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    RhyOrg/RhyDB#1345 ·

    Maintainers usually reply within 1 day

  • Aggressive Map Pull-up through Project, OrderBy and Aggregate
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    RhyOrg/RhyDB#1336 · 3 comments ·

    Maintainers usually reply within 1 day

  • Increase 32-bit row-limit
    Open

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    RhyOrg/RhyDB#1329 ·

    Maintainers usually reply within 1 day

  • Server timing API
    Open

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    RhyOrg/RhyDB#1313 ·

    Maintainers usually reply within 1 day

  • Database and query result schema
    Open
    epic

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    RhyOrg/RhyDB#1312 · 6 comments ·

    Maintainers usually reply within 1 day

  • Refactor sequence columns to store immutable chunks
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 38/100

    RhyOrg/RhyDB#1308 ·

    Maintainers usually reply within 1 day

  • Value columns should zero-copy convertable to Arrow Arrays
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    RhyOrg/RhyDB#1300 ·

    Maintainers usually reply within 1 day

  • Refactor columns to store immutable chunks
    May be free again @taepper claimed this 135 days ago, and no pull request is open. Open
    epic

    RhyOrg/RhyDB#1295 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Add an autocompletion endpoint for SaneQL
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    RhyOrg/RhyDB#1283 ·

    Maintainers usually reply within 1 day

  • Add proper scalar expression parsing to SaneQL
    Open

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    RhyOrg/RhyDB#1273 ·

    Maintainers usually reply within 1 day

  • Newick parser should correctly parse labels with escaping
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 55/100

    RhyOrg/RhyDB#1272 ·

    Maintainers usually reply within 1 day

  • Add a `delete` operator to query language
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    RhyOrg/RhyDB#1265 ·

    Maintainers usually reply within 1 day

  • Add common scalar expressions
    May be free again @taepper claimed this 141 days ago, and no pull request is open. Open
    epic good first issue

    RhyOrg/RhyDB#1263 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Map Expression Pull-up
    Open
    epic

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    RhyOrg/RhyDB#1258 · 2 comments ·

    Maintainers usually reply within 1 day

  • SaneQL optimizer improvements
    Open
    epic

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    RhyOrg/RhyDB#1256 ·

    Maintainers usually reply within 1 day

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