Changes for version 2.000001_03 - 2026-10-24
- SQL::Abstract::Tree: the indentmap understands "and", "or" and "," to put AND / OR conditions and the items of a clause list (select list, ORDER BY, GROUP BY, SET ...) on lines of their own; off in all profiles unless asked for (idea from Ryan P. Kelly's format-sql branch)
- ORDER BY: { -asc => $col, -nulls => "first" } (or -desc, or "last") renders $col ASC NULLS FIRST; the -nulls key applies to every column of its -asc / -desc hash (idea and tests from ilmari)
- SQL::Abstract::Tree: an operator followed by a parenthesised expression in a list (trunc(a - (b + c), 2)) no longer gets a comma inserted in front of it, and a backslash-escaped question mark operator for DBD::Pg (\?, \?|, \?&, \?-| ...) is kept as one operator instead of being split up as a placeholder (tests by ilmari)
- New README.md (for the repository) and LICENSE file; the LICENSE is now part of the repository and shipped as-is in the tarball
- New SECURITY.md: how to report security issues privately, which versions get fixes and what counts as a security issue (RT#167662)
- Docs: new "SQL::Abstract, DBIx::Class and DBIO" section - DBIx::Class uses SQL::Abstract::Classic since 0.082842 and no longer this module, DBIO (a DBIx::Class fork) builds on SQL::Abstract 2.x and SQL::Abstract::Tree; the "SQL::Abstract developers" link now points at our own SUPPORT section instead of DBIx::Class, and SEE ALSO lists DBIO and SQL::Abstract::Classic
- Docs: new "CAVEAT: untrusted input in ORDER BY" section - order by columns are identifiers, not bind values, so map user input onto an allow-list (and set quote_char) instead of passing it through (RT#117059)
- SQL::Abstract::Tree: an empty placeholder_surround (or one with only a left part) fills in placeholders without "Use of uninitialized value $left / $right" warnings (RT#117234)
- Docs: the literal SQL examples no longer use the deprecated operator-inside-the-literal style: -ident for column comparisons, { "=" => \[ ... ] }, { -in => \[ $sub_stmt, @sub_bind ] } and { ">" => \[ "ALL (...)", ... ] } for subqueries (with the real bind order); the special_ops and unary_ops sections show how the defined operator is used, and unary_ops handlers are documented to return ($sql, @bind) (RT#127116, KES)
- Docs: where() is documented as where($where, $order) like select(), with hashref and arrayref examples; the WHERE CLAUSES introduction and the logic option say how the @where array examples are passed (\@where), and the "pending%" OR example has balanced parenthesis and the real bind order (RT#127117, KES)
- An undef element in an -in / -not_in list no longer dies with the "!!!AUDIT YOUR CODE AND DATA!!!" exception; it now renders the logically correct SQL that exception promised: ( col IN (...) OR col IS NULL ) and ( col NOT IN (...) AND col IS NOT NULL ) (RT#127356)
- SQL::Abstract::Tree: quoted strings and identifiers ('...', "...", `...`) are no longer split up at the commas, parenthesis, whitespace or keywords inside them. A Postgres range literal such as '(]' no longer dies with "missing closing ')'", and 'a,b' is no longer reformatted as 'a, b' (RT#132994, RT#105625)
- SQL::Abstract::Tree: an unknown operator followed by a function call (foo <@ tstzrange(...)) next to an AND/OR is kept as one operand instead of getting an AND/OR inserted after the operator
- New constructor option array_as_in: renders col => [ 1, 2, 3 ] as col IN ( ?, ?, ? ) instead of a chain of OR-ed equalities (much faster on MySQL for long lists); undef elements become an extra OR col IS NULL. Off by default, and only applied where the meaning is identical (RT#156818)
- Docs/metadata: now maintained by Torsten Raudssus; support moved from the DBIx::Class mailing list to IRC #dbio on irc.perl.org (also in META x_IRC); dropped the dead git.shadowcat.co.uk repository links in favour of GitHub; updated Nathan Wiger's contact address; META author is now the maintainer; added a COPYRIGHT section
Changes for version 2.000001_02 - 2026-10-21
- t/05in_between.t: the subclass test packages no longer use the `package NAME { ... }` syntax (perl 5.14+) or `use mro`/`use parent`, so the test suite compiles and passes on perl 5.8 - 5.12 again
Changes for version 2.000001_01 - 2026-09-27
- SQL::Abstract::Parts: drop the leftover `use Module::Runtime`. It was never called, and Module::Runtime stopped being a prerequisite in 2.000001, so on a system without it installed loading Parts.pm (and hence the whole render path that builds Parts objects) died at compile time
- SQL::Abstract::Tree: pad_keyword() no longer emits "Use of uninitialized value" warnings when a caller supplies an indentmap without a newline (it now guards newline the way _unparse already does)
- SQL::Abstract::Tree: a (NOT) BETWEEN now parses both of its bounds into a single AND grouped under the BETWEEN node (BETWEEN[val, AND[low, high]]) instead of letting the upper bound leak out as a sibling in the enclosing expression. The re-parse that was meant to do this never fired, because it compared an arrayref node against the string '-LITERAL'. Emitted SQL text round-trips unchanged; only the parsed tree (parse()) is affected.
- select() now dies when given more than the four positional arguments (source, fields, where, order) instead of rendering garbage SQL from a flat clause list that was meant to be a hashref (RT#148271, Ovid)
- ExtraClauses: -join accepts the dashed spellings -as / -on / -using / -type / -to / -from like the surrounding from_list does, and dies on an unknown key instead of silently dropping it (RT#148271, Ovid)
- SQL::Abstract::Tree: recognise Oracle's MINUS as an expression start keyword, like EXCEPT (RT#134245, DAMI)
- SQL::Abstract::Tree: anchor the unrollable-operator regex so that ON no longer matches inside function names such as GROUP_CONCAT or CONCAT_WS and strips their parenthesis on unparse/format (RT#105563, RT#117234)
- An undef element in a -row (and so in -values and the ExtraClauses insert rowvalues clause) is now a NULL bind instead of being silently dropped, which lost placeholders and bind values in bulk inserts (RT#137357)
- Add regression coverage confirming an empty arrayref given to -and / -or in a where clause emits no SQL and no trailing AND/OR (correct since the v2 engine; locks it against regressions) (RT#126990, GH#15, fabzzap)
- Document that the bundled DBIx::Class::* helper modules require DBIx::Class at runtime (intentionally not a prereq, to avoid a dependency cycle)
- Document the limits of the default injection_guard and the safe handling of untrusted input (bind values, quote_char) (RT#117059)
- generate() in scalar context now interpolates each placeholder exactly once, so a bind value that contains a '?' no longer swallows the following bind values
- Reword the "removed in 2.0" deprecation warnings to "a future version", since those code paths still ship in the 2.x line
- Do not warn when a plain hashref is passed as a bind value to insert() - this is how Postgres json/jsonb columns are supplied (GH#18, RT#120676, kraih)
- Speed up the top-level special-op check with a single precompiled regex instead of a List::Util::first scan (GH#21, larryl)
- Fix ExtraClauses POD NAME/synopsis to the real package name and the documented plugin('+ExtraClauses') usage
- Correct the 'pending%' bind value in the -like POD example (GH#24, lucas1)
- SQL::Abstract::Tree: preserve a real 0 / '0' bind value in fill_in_placeholder() instead of blanking it (was `|| ''`) (RT#125760)
- Add DBIx::Class::SQLMaker::Role::SQLA2Passthrough to Makefile.PL no_index so the proof-of-concept role is not indexed under SQL-Abstract on CPAN
- Refactor subclass method override grandfathering system
- Remove old SQLA::More compat code (will restore a better set later)
- Fix for empty 'order by' to ->select (dakkar)
- Remove vestigial possibly-special-op name conversion, which stopped special_ops regexes matching op names containing underscores (RT#143837)
- Fixes for _where_field_IN/BETWEEN overrides (jjatria)
- Correctly handle literal passed to insert from/values key
- Make puke() and belch() methods, ala the SQLA::Classic change
- Syntax error fixes for 5.8 from ilmari
Documentation
Modules
A test of future possibilities
Pretty Printing DebugObj
Generate SQL from Perl data structures
new/experimental additions to SQL::Abstract
Reference documentation for SQL::Abstract
helpful methods for plugin authors
Helper function for testing SQL::Abstract
Represent SQL as an AST
Provides
in maint/lib/Chunkstrumenter.pm
in lib/SQL/Abstract/Formatter.pm
in lib/SQL/Abstract/Parts.pm