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

Enums

AggregateFunc

Aggregate function used in group_by operations.

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.

Functions

parse_condition_expr

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

parse_query

편의 함수: 쿼리 문자열 → Query