Support DuckDB syntax: FROM-first, SEMI/ANTI joins, COPY, ATTACH, MACRO, PRAGMA and DuckDB 2.0 additions

[hayssams]

Adds support for nineteen DuckDB constructs that JSqlParser rejected (or silently mis-parsed), including the new DuckDB 2.0 syntax. One commit per feature, each with tests that assert both the AST and a stable round-trip through toString() and the deparser.

Features, with the DuckDB documentation that specifies them

Feature	Example	DuckDB reference
GLOB pattern matching	WHERE b GLOB 'y*'	Pattern matching
Standalone SEMI / ANTI joins	FROM t ANTI JOIN u ON t.id = u.id	FROM clause
MAP(key, value) column type	CREATE TABLE t (m MAP(VARCHAR, INTEGER))	MAP type
INSERT ... BY NAME / BY POSITION	INSERT INTO t BY NAME SELECT 1 AS b, 2 AS a	INSERT
USING SAMPLE sizes and methods	USING SAMPLE 10 PERCENT (bernoulli)	Samples
DESCRIBE <query>	DESCRIBE SELECT * FROM t	DESCRIBE
PRAGMA	PRAGMA table_info('t'), PRAGMA memory_limit = '1GB'	Pragmas
INSTALL / LOAD extensions	FORCE INSTALL h3 FROM community, LOAD httpfs	Extensions
ATTACH / DETACH	ATTACH 'file.db' AS mydb (TYPE SQLITE, READ_ONLY)	ATTACH/DETACH
PREPARE / DEALLOCATE	PREPARE q AS SELECT * FROM t WHERE a = $1	Prepared statements
COPY (import and export)	COPY (SELECT * FROM t) TO 'out.parquet' (FORMAT PARQUET)	COPY
CREATE MACRO (scalar and table)	CREATE MACRO add(a, b := 5) AS a + b	CREATE MACRO
FROM-first queries	FROM t SELECT a, FROM t WHERE a > 1	FROM clause
UNPIVOT statement form	UNPIVOT monthly_sales ON jan, feb INTO NAME month VALUE sales	UNPIVOT
2.0 CONNECT / DISCONNECT	CONNECT 'postgres://localhost/mydb'	A preview of DuckDB v2.0
2.0 CREATE TRIGGER ... REFERENCING OLD/NEW TABLE with a statement body	CREATE TRIGGER t AFTER UPDATE ON x REFERENCING OLD TABLE AS o NEW TABLE AS n FOR EACH STATEMENT INSERT INTO ...	A preview of DuckDB v2.0
2.0 CREATE EXTENSION REPOSITORY	CREATE EXTENSION REPOSITORY my_repo WITH PREFIX 'https://…'	A preview of DuckDB v2.0
2.0 APPROX NEAREST n BY SIMILARITY joins	JOIN products t APPROX NEAREST 2 BY SIMILARITY array_cosine_similarity(q.vec, t.vec)	A preview of DuckDB v2.0
2.0 recursive CTE USING KEY	WITH RECURSIVE tbl (a, b) USING KEY (a, avg(b)) AS (...)	A preview of DuckDB v2.0

Notes

• ANTI JOIN previously parsed silently as a table alias, so valid SQL produced a wrong AST. Join.isAnti() now records it, and LEFT/RIGHT/FULL SEMI|ANTI are accepted too.
• New Statement types (PRAGMA, INSTALL/LOAD, ATTACH/DETACH, CONNECT/DISCONNECT, PREPARE/DEALLOCATE, COPY, CREATE MACRO, CREATE EXTENSION REPOSITORY) are wired through StatementVisitor, StatementVisitorAdapter, StatementDeParser, TablesNamesFinder, StatementFeatureVisitor and StatementValidator. COPY, PREPARE and UNPIVOT expose their nested query to TablesNamesFinder.
• FROM-first is represented as a PlainSelect with a fromFirst flag, so the clause order round-trips; SelectDeParser follows the same order. Bare FROM t queries and BigQuery pipe syntax are untouched.
• UnPivotQuery mirrors the existing PivotQuery, added as default visitor methods so no third-party visitor breaks.
• New keywords are non-reserved and stay usable as identifiers; regression tests cover glob, anti, load, install, attach, detach and pragma.

Test plan

• New tests in DuckDBTest, each feature with a regression case for the syntax it could have shadowed (POSITION(...), MySQL ALGORITHM COPY, Oracle CONNECT BY, PostgreSQL CREATE EXTENSION, EXECUTE FUNCTION triggers, FROM-clause UNPIVOT (...), pipe queries).
• Full suite: 7050 tests, 1 failure — SpecialOracleTest.testAllSqlsParseDeparse, which fails on an unmodified master in this environment too.
• JavaCC still reports 0 errors and 1 warnings, the same warning as on master.

🤖 Generated with Claude Code

https://claude.ai/code/session_01EqinwHBKuAtPEmtXr3b5P2

[manticore-projects]

Run './gradlew spotlessApply' to fix all violations.

[hayssams]

@manticore-projects
Fixed
Thanks!