Module expression 

Nested message and enum types in Expression.

Modules

cast

Nested message and enum types in Cast.

embedded_function

Nested message and enum types in EmbeddedFunction.

enum

Nested message and enum types in Enum.

field_reference

Nested message and enum types in FieldReference.

if_then

Nested message and enum types in IfThen.

literal

Nested message and enum types in Literal.

mask_expression

Nested message and enum types in MaskExpression.

multi_or_list

Nested message and enum types in MultiOrList.

nested

Nested message and enum types in Nested.

reference_segment

Nested message and enum types in ReferenceSegment.

subquery

Nested message and enum types in Subquery.

switch_expression

Nested message and enum types in SwitchExpression.

window_function

Nested message and enum types in WindowFunction.

Structs

Cast

EmbeddedFunction

Enum

FieldReference

A reference to data within a structured object, supporting navigation into nested fields. The root_type specifies the origin of the data (input record, outer query, lambda parameters, or an arbitrary expression), and the reference_type specifies how to navigate from that root (either a direct path to a single element or a mask selecting multiple elements).

IfThen

Lambda

A lambda expression representing an inline, anonymous function. Lambda expressions have parameters and a body expression that can reference those parameters using FieldReference with FieldReference.LambdaParameterReference as the root_type.

LambdaInvocation

Invokes an inline lambda expression with provided arguments. Enables immediate invocation patterns like: ((x) -> x * 2)(5)

Literal

MaskExpression

A reference that takes an existing subtype and selectively removes fields from it. For example, one might initially have an inner struct with 100 fields but a a particular operation only needs to interact with only 2 of those 100 fields. In this situation, one would use a mask expression to eliminate the 98 fields that are not relevant to the rest of the operation pipeline.

MultiOrList

Nested

Expression to dynamically construct nested types.

ReferenceSegment

A way to reference the inner property of a complex record. Can reference either a map key by literal, a struct field by the ordinal position of the desired field or a particular element in an array. Supports expressions that would roughly translate to something similar to: a.b[2].c[‘my_map_key’].x where a,b,c and x are struct field references (ordinalized in the internal representation here), [2] is a list offset and [‘my_map_key’] is a reference into a map field.

ScalarFunction

A scalar function call.

SingularOrList

Subquery

Subquery relation expression

SwitchExpression

WindowFunction

A window function call.

Enums

RexType