Support typed array literals ARRAY<T>[...]

[moshap-firebolt]

GoogleSQL/BigQuery allows an array literal to declare its element type in angle brackets before the elements, e.g. ARRAY<INT64>[1, 2, 3] (analogous to the already-supported typed struct literal STRUCT<...>(...)). Previously this mis-parsed as ARRAY < T > [..] — an identifier, comparisons and a subscript — which surfaced downstream as Column 'array' does not exist.

Changes

• Add an element_type: Option<DataType> field to the Array expression node (None for untyped [..] / ARRAY[..]). Display renders ARRAY<T>[...] when set, so typed literals round-trip.
• Parse ARRAY <element_type> [ ... ] when a new supports_array_typed_literal dialect flag is set (BigQuery), reusing the data-type parser — so nested ARRAY<STRUCT<...>> / ARRAY<ARRAY<...>> element types and empty ARRAY<INT64>[] all work. Untyped arrays are unchanged.

Tests

• tests/sqlparser_bigquery.rs::parse_typed_array_literal — round-trips scalar / empty / nested-struct / nested-array element types, and asserts the recorded element_type (and None for untyped arrays).

Note: ARRAY<ARRAY<...>> is accepted at the grammar level (valid GoogleSQL); the arrays-of-arrays restriction is a BigQuery semantic rule enforced downstream, consistent with the parser's permissive design.

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Cursor Bugbot has reviewed your changes using default effort and found 1 potential issue.

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Unmatched angle bracket is swallowed

Low Severity

The typed array path calls expect_closing_angle_bracket and drops its return value. When that helper consumes >>, the leftover > is never reported, so an extra closing bracket is accepted and the literal still parses. Typed STRUCT literals check this leftover flag and error instead.

 

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