Module relations 

Structs

Column

NamedColumnList

ParsedNamedArgs

Extracts named arguments from pest pairs with duplicate detection and completeness checking.

RelationParsingContext

Parsing context for relations that includes extensions, registry, and optional warning collection

TableName

VirtualReadRel 🔒

Parsed Read:Virtual[rows => columns] relation. Needs a newtype because the proto type is ReadRel (same as NamedTable), but the grammar and handling are different.

Traits

RelationParsePair

A trait for parsing relations with full context for tree building.

Functions

build_grouping_fields 🔒

Deduplicates expressions across all sets and produces the AggregateRel’s protobuf fields: a flat deduplicated expression list and per-set Grouping messages with index references into that list.

build_named_struct 🔒

Build a NamedStruct from parsed columns.

expect_one_child 🔒

This is a utility function for extracting a single child from the list of children, to be used in the RelationParsePair trait. The RelationParsePair trait passes a Vec of children, because some relations have multiple children - but most accept exactly one child.

i64_literal_expr 🔒

make_emit 🔒

Build an emit: Direct if the mapping is the identity [0, 1, ..., N-1] (where N = direct_output_count), otherwise Emit with the explicit mapping.

parse_aggregate_measures 🔒

Parses the output section of an aggregate (everything after =>).

parse_emit 🔒

Parse a reference list into an emit and output field count.

parse_expression_list 🔒

Grammar: expression_list = { expression ~ ("," ~ expression)* }

parse_grouping_set 🔒

Parses a single grouping set, e.g. ($0, $1) or _.

parse_grouping_sets 🔒

Parses the grouping section of an aggregate (everything before =>).

parse_output_mapping 🔒

Parse a reference list Pair and return an EmitKind::Emit. Parse a reference list into field indices for emit mapping.

parse_virtual_read_args 🔒

Read:Virtual positional args: either empty or a list of row tuples.

parse_virtual_row 🔒

Parse a single virtual_row ((expr, expr, ...) or ()) into a nested::Struct.