Module expressions 

Structs

FunctionInvocation

The fields shared by every Substrait function call - ScalarFunction, AggregateFunction, and WindowFunction - that render as name#anchor(args, options).

Reference

Enums

PrecisionFormatError 🔒

Functions

days_to_date_string 🔒

Convert days since Unix epoch to date string

duration_from_precision_units 🔒

Convert a value in precision units, to a chrono::Duration. Precision 12 (picoseconds) is truncated to nanoseconds: chrono can’t represent sub-nanosecond resolution.

fractional_spec 🔒

The chrono fractional-seconds format specifier for a precision, or "" for precision 0 (whole seconds, no fractional part). A fixed-width specifier is used so the rendered fractional digits match the declared precision exactly. Precision 12 renders at nanosecond width, matching the truncation in duration_from_precision_units.

is_default_for_syntax 🔒

Whether this type is the default interpretation for its value syntax.

picosecond_truncation_warning 🔒

Returns the diagnostic for truncating a picosecond value to nanoseconds.

precision_time_to_string 🔒

Convert a value in precision units since midnight, to a time-of-day string. Errors if value falls outside a single day: NaiveTime + Duration wraps modulo 24 hours, which would otherwise silently misrepresent the value.

precision_timestamp_to_string 🔒

Convert a value in precision units since the Unix epoch, to a timestamp string. Errors if value is out of chrono’s representable date range.

textify_binary

textify_enum

Write an enum value. Enums are written as &<identifier>, if the string is a valid identifier; otherwise, they are written as &'<escaped_string>'.

unimplemented_literal 🔒

Write an error token for a literal type that hasn’t been implemented yet.

write_literal_type_suffix 🔒

The type suffix for a literal (e.g., "i32", "fp64", "date"). Returns None for unimplemented types whose write_literal_value already emitted an error token.

write_literal_value 🔒

Write just the value portion of a literal, with no type suffix or nullability marker.

write_precision_literal 🔒