Module ast 

Abstract Syntax Tree (AST) definitions for SQL queries

This module contains all the data structures that represent the parsed SQL query structure.

Structs

CTE

Common Table Expression (CTE) structure

ColumnRef

Column reference with optional quoting information and table prefix

Condition

JoinClause

Join clause structure

JoinCondition

Join condition - can be multiple conditions connected by AND

OrderByColumn

SelectStatement

SimpleWhenBranch

SingleJoinCondition

Single join condition

WebCTESpec

Specification for WEB CTEs

WhenBranch

WhereClause

WindowFrame

Window frame specification

WindowSpec

Enums

CTEType

Type of CTE - standard SQL or WEB fetch

DataFormat

Data format for WEB CTEs

FrameBound

Window frame bounds

FrameUnit

Window frame unit (ROWS or RANGE)

HttpMethod

HTTP methods for WEB CTEs

JoinOperator

Join operator for join conditions

JoinType

Join type enumeration

LogicalOp

QuoteStyle

Quote style for identifiers (column names, table names, etc.)

SelectItem

Represents a SELECT item - either a simple column or a computed expression with alias

SortDirection

SqlExpression

TableFunction

Table function that generates virtual tables

TableSource

Table source - either a file/table name or a derived table (subquery/CTE)