Module parser 

Query parser — converts query strings into an AST.

Structs

Comparison

비교식: IDENTIFIER compare_op value

GroupAggregate

GROUP BY 집계 연산 정의

Path

경로: . + 세그먼트들

Query

쿼리 AST (Abstract Syntax Tree)

SelectExpr

SELECT 절의 컬럼 표현식

WindowOrderBy

윈도우 ORDER BY 절의 개별 항목

WindowSpec

윈도우 스펙: OVER (PARTITION BY ... ORDER BY ...)

Enums

AggregateFunc

Aggregate function used in group_by operations.

ArithmeticOp

Arithmetic binary operator.

CompareOp

Comparison operator used in where conditions.

Condition

Boolean condition used in where clauses.

Expr

Expression used in select clauses and function arguments.

LiteralValue

Literal value used as a comparison operand or in expressions.

Operation

Pipeline operation applied after path navigation (e.g., | where ..., | sort ...).

Segment

A single segment of a navigation path.

WindowFunc

윈도우 함수 종류

Functions

parse_add_field_expr

--add-field 표현식 파싱: "name = expression" 예: “total = amount * quantity”, “full_name = first_name + " " + last_name”

parse_condition_expr

where 절의 조건식만 파싱하는 편의 함수 예: “age > 30 and city == "Seoul"”

parse_query

편의 함수: 쿼리 문자열 → Query