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PostgreSQL dialect fails to parse IN with union #1792

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adamchainz opened this issue Apr 2, 2025 · 0 comments · May be fixed by #1793
Open

PostgreSQL dialect fails to parse IN with union #1792

adamchainz opened this issue Apr 2, 2025 · 0 comments · May be fixed by #1793

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@adamchainz
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adamchainz commented Apr 2, 2025 •
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Minimal example:

SELECT 1 FROM t WHERE t.id IN ((SELECT id FROM t) UNION (SELECT id FROM t))

Currently, this fails with:

ParserError("Expected: ), found: UNION at Line: 1, Column: 51")

I checked this works on PostgreSQL shell:

postgres=# create table t(id int);
CREATE TABLE
postgres=# SELECT 1 FROM t WHERE t.id IN ((SELECT id FROM t) UNION (SELECT id FROM t));
 ?column?
----------
(0 rows)

And it fails to parse on SQLite:

sqlite> create table t(id int);
sqlite> SELECT 1 FROM t WHERE t.id IN ((SELECT id FROM t) UNION (SELECT id FROM t));
Parse error: near "UNION": syntax error
  SELECT 1 FROM t WHERE t.id IN ((SELECT id FROM t) UNION (SELECT id FROM t));
                                      error here ---^
@adamchainz adamchainz linked a pull request Apr 2, 2025 that will close this issue
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Add support for 'IN <SetExpression>' adamchainz/datafusion-sqlparser-rs
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