[LucaCappelletti94]

This PR lets SQLiteDialect parse type names made of several words or string literals in column definitions, CAST and ALTER TABLE ... ADD. Column constraints such as NOT NULL, PRIMARY KEY or DEFAULT still end the type name.

CREATE TABLE t (a UNSIGNED BIG INT, b NATIVE CHARACTER(70), c 'text');
SELECT CAST(a AS foo bar) FROM t;
-- Previously: Expected: ',' or ')' after column definition, found: BIG

SQLite accepts any sequence of names as a type, see datatypes.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 95.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.03%. Comparing base (594bb04) to head (68b01b4).

Files with missing lines	Patch %	Lines
src/parser/mod.rs	94.11%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2556      +/-   ##
==========================================
+ Coverage   81.99%   82.03%   +0.03%     
==========================================
  Files          42       42              
  Lines       35049    35129      +80     
  Branches    35049    35129      +80     
==========================================
+ Hits        28740    28817      +77     
- Misses       2744     2747       +3     
  Partials     3565     3565              

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[sabir-akhadov-localstack]

Two non-blocking comments inline.

[sabir-akhadov-localstack]

Types with a dedicated arm never reach this path, so CREATE TABLE t (a INT FOO) and a TEXT FOO PRIMARY KEY still fail on SQLite while a FOO INT parses; sqlite 3.46 accepts both and stores the declared type as INT FOO. Rewinding to next_token_index and taking parse_multiword_type_name when the token after the dedicated arm would continue the name covers it.

[LucaCappelletti94]

Built-in-prefixed type names are handled in 947dab70. The fallback covers both remaining name words and errors inside dedicated parsers, including ENUM FOO and TIMESTAMP WITH FOO.

[sabir-akhadov-localstack]

CREATE TABLE t (a NULL, b INT) is an untyped column with a NULL constraint in sqlite 3.46 (pragma_table_info type is empty) but parses here as Custom(NULL); Keyword::NULL is missing from this list although the continuation stop set in parse_multiword_type_name has it.

[LucaCappelletti94]

Leading NULL is parsed as a constraint on an untyped column in 947dab70, and I added adequate tests for the rejected variants.