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

Condition

JoinClause

Join clause structure

JoinCondition

Join condition - initially just column equality

OrderByColumn

SelectStatement

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)

JoinOperator

Join operator for join conditions

JoinType

Join type enumeration

LogicalOp

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)