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    ParseError

    source
    pub(all) suberror ParseError {
      Unsupported(message~ : String, span~ : Span)
      Syntax(message~ : String, span~ : Span, expected~ : Array[String], found~ : String)
    } derive(Eq, 
    Debug    )

    Why a statement could not be parsed.

    BinaryOp

    source
    pub(all) enum BinaryOp {
      Add
      Sub
      Mul
      Div
      Mod
      Concat
      Eq
      Ne
      Lt
      Le
      Gt
      Ge
    } derive(Eq, 
    Debug    )

    Comment

    source
    pub(all) struct Comment {
      kind : CommentKind
      text : String
      span : Span
    } derive(Eq, 
    Debug    )

    A comment as written: -- note (without the line break) or /* note */.

    CommentKind

    source
    pub(all) enum CommentKind {
      Line
      Block
    } derive(Eq, 
    Debug    )

    Corresponding

    source
    pub(all) enum Corresponding {
      All
      By(Array[Identifier])
    } derive(Eq, 
    Debug    )

    CORRESPONDING [BY (names)] (RFC 0007).

    DataType

    source
    pub(all) enum DataType {
      Null
      Missing
      Bool
      TinyInt
      SmallInt
      Int
      BigInt
      Decimal(Int?, Int?)
      Numeric(Int?, Int?)
      Real
      Double(Int?)
      Char(Int?)
      Varchar(Int?)
      String
      Symbol
      Blob
      Clob
      Date
      Time(Int?, with_tz~ : Bool)
      Timestamp(Int?, with_tz~ : Bool)
      Interval(IntervalQualifier)
      Struct
      Tuple
      List
      Bag
      Sexp
      Any
      Map(DataType, DataType)
      Array(DataType?)
      Custom(Identifier)
    } derive(Eq, 
    Debug    )

    A data type in CAST, IS and type positions.

    DatetimeField

    source
    pub(all) enum DatetimeField {
      Year
      Month
      Day
      Hour
      Minute
      Second
      TimezoneHour
      TimezoneMinute
    } derive(Eq, 
    Debug    )

    EdgeDirection

    source
    pub(all) enum EdgeDirection {
      Left
      Undirected
      Right
      LeftOrUndirected
      UndirectedOrRight
      LeftOrRight
      Any
    } derive(Eq, 
    Debug    )

    EdgeFiller

    source
    pub(all) struct EdgeFiller {
      variable : Identifier?
      label : Label?
      where_ : Expr?
      span : Span
    } derive(Eq, 
    Debug    )

    [ [name] [: label] [WHERE expr] ]

    EdgePattern

    source
    pub(all) struct EdgePattern {
      direction : EdgeDirection
      filler : EdgeFiller?
      quantifier : Quantifier?
      span : Span
    } derive(Eq, 
    Debug    )

    An edge. filler is None only for the abbreviated form (->), so -> and -[]-> stay different. The span includes the quantifier.

    Expr

    source
    pub(all) struct Expr {
      kind : ExprKind
      span : Span
    } derive(Eq, 
    Debug    )

    Expr::strip_spans

    source
    fn Expr::strip_spans(self : Expr) -> Expr

    The same expression with every span set to { start: 0, end: 0 }.

    ExprKind

    source
    pub(all) enum ExprKind {
      Lit(Literal)
      VarRef(Identifier, qualified~ : Bool)
      Parameter
      Path(Expr, Array[PathStep])
      Unary(UnaryOp, Expr)
      Binary(BinaryOp, Expr, Expr)
      And(Expr, Expr)
      Or(Expr, Expr)
      Not(Expr)
      BoolTest(Expr, Bool?, negated~ : Bool)
      Like(Expr, pattern~ : Expr, escape~ : Expr?, negated~ : Bool)
      Between(Expr, low~ : Expr, high~ : Expr, negated~ : Bool)
      In(Expr, Expr, negated~ : Bool)
      IsNull(Expr, negated~ : Bool)
      IsMissing(Expr, negated~ : Bool)
      IsType(Expr, DataType, negated~ : Bool)
      Overlaps(Expr, Expr)
      Case(operand~ : Expr?, branches~ : Array[(Expr, Expr)], default~ : Expr?)
      Cast(Expr, DataType)
      Extract(DatetimeField, Expr)
      Trim(spec~ : TrimSpec?, chars~ : Expr?, Expr)
      Substring(Expr, start~ : Expr, length~ : Expr?)
      Position(Expr, Expr)
      Overlay(Expr, placing~ : Expr, from~ : Expr, for_~ : Expr?)
      Coalesce(Array[Expr])
      NullIf(Expr, Expr)
      DateAdd(DatetimeField, Expr, Expr)
      DateDiff(DatetimeField, Expr, Expr)
      Call(Identifier, Array[Expr], quantifier~ : SetQuantifier?)
      CallStar(Identifier)
      List(Array[Expr])
      Bag(Array[Expr])
      Sexp(Array[Expr])
      Struct(Array[(Expr, Expr)])
      Map(Array[(Expr, Expr)])
      Row(Array[Expr])
      Values(Array[Expr])
      Query(Query)
      GraphMatch(GraphMatch)
      Error
    } derive(Eq, 
    Debug    )

    FromItem

    source
    pub(all) enum FromItem {
      Scan(FromSource)
      Unpivot(FromSource)
      Join(Join)
    } derive(Eq, 
    Debug    )

    FromSource

    source
    pub(all) struct FromSource {
      lateral : Bool
      expr : Expr
      as_ : Identifier?
      at : Identifier?
      by : Identifier?
      span : Span
    } derive(Eq, 
    Debug    )

    A FROM source with its AS, AT and BY variables.

    GraphMatch

    source
    pub(all) struct GraphMatch {
      graph : Expr
      pattern : GraphPattern
      span : Span
    } derive(Eq, 
    Debug    )

    (graph MATCH pattern), or graph MATCH pattern as a FROM item. The span includes the parentheses of the parenthesized form.

    GraphPattern

    source
    pub(all) struct GraphPattern {
      selector : Selector?
      paths : Array[PathPattern]
      where_ : Expr?
      span : Span
    } derive(Eq, 
    Debug    )

    A selector, one or more path patterns, and an optional postfilter. paths is never empty; where_ is None in the FROM form.

    GroupBy

    source
    pub(all) struct GroupBy {
      keys : GroupKeys
      group_as : Identifier?
      span : Span
    } derive(Eq, 
    Debug    )

    GroupDelimiter

    source
    pub(all) enum GroupDelimiter {
      Paren
      Bracket
    } derive(Eq, 
    Debug    )

    GroupKey

    source
    pub(all) struct GroupKey {
      expr : Expr
      as_ : Identifier?
      span : Span
    } derive(Eq, 
    Debug    )

    GroupKeys

    source
    pub(all) enum GroupKeys {
      All
      By(Array[GroupKey], partial~ : Bool)
    } derive(Eq, 
    Debug    )

    GroupPattern

    source
    pub(all) struct GroupPattern {
      delimiter : GroupDelimiter
      path : PathPattern
      where_ : Expr?
      quantifier : Quantifier?
      span : Span
    } derive(Eq, 
    Debug    )

    ( path [WHERE expr] ) or [ path [WHERE expr] ], with an optional quantifier. The span includes the quantifier.

    Identifier

    source
    pub(all) struct Identifier {
      text : String
      delimited : Bool
      span : Span
    } derive(Eq, 
    Debug    )

    An identifier: a regular name (case-insensitive) or a delimited "name" (case-sensitive).

    IntervalQualifier

    source
    pub(all) struct IntervalQualifier {
      start : DatetimeField
      start_precision : Int?
      end : DatetimeField?
      fractional_precision : Int?
    } derive(Eq, 
    Debug    )

    Join

    source
    pub(all) struct Join {
      kind : JoinKind
      form : JoinForm
      left : FromItem
      right : FromItem
      span : Span
    } derive(Eq, 
    Debug    )

    JoinForm

    source
    pub(all) enum JoinForm {
      Comma
      Cross
      On(Expr)
    } derive(Eq, 
    Debug    )

    JoinKind

    source
    pub(all) enum JoinKind {
      Inner
      Left
      Right
      Full
    } derive(Eq, 
    Debug    )

    Label

    source
    pub(all) struct Label {
      kind : LabelKind
      span : Span
    } derive(Eq, 
    Debug    )

    A label expression. The span of a parenthesized label includes the parentheses.

    LabelKind

    source
    pub(all) enum LabelKind {
      Name(Identifier)
      Wildcard
      Not(Label)
      And(Label, Label)
      Or(Label, Label)
    } derive(Eq, 
    Debug    )

    LetBinding

    source
    pub(all) struct LetBinding {
      expr : Expr
      name : Identifier
      span : Span
    } derive(Eq, 
    Debug    )

    Literal

    source
    pub(all) enum Literal {
      Null
      Missing
      Bool(Bool)
      Int(String)
      Decimal(String)
      Float(String)
      String(String)
      Ion(String, 
    IonValue    )
      Date(String)
      Time(String, precision~ : Int?, with_tz~ : Bool)
      Timestamp(String, precision~ : Int?, with_tz~ : Bool)
      Interval(String, negative~ : Bool, qualifier~ : IntervalQualifier)
    } derive(
    Debug    )

    A literal. Numbers keep their source text; an Ion literal keeps its text and its parsed value.
    impl Eq for Literal

    NodePattern

    source
    pub(all) struct NodePattern {
      variable : Identifier?
      label : Label?
      where_ : Expr?
      span : Span
    } derive(Eq, 
    Debug    )

    ( [name] [: label] [WHERE expr] )

    NullsOrder

    source
    pub(all) enum NullsOrder {
      First
      Last
    } derive(Eq, 
    Debug    )

    PathPart

    source
    pub(all) enum PathPart {
      Node(NodePattern)
      Edge(EdgePattern)
      Group(GroupPattern)
    } derive(Eq, 
    Debug    )

    PathPattern

    source
    pub(all) struct PathPattern {
      restrictor : Restrictor?
      variable : Identifier?
      parts : Array[PathPart]
      span : Span
    } derive(Eq, 
    Debug    )

    [restrictor] [name =] part+. parts is never empty.

    PathStep

    source
    pub(all) enum PathStep {
      Field(Identifier)
      FieldString(String, span~ : Span)
      Index(Expr)
      AllElements(Span)
      AllFields(Span)
    } derive(Eq, 
    Debug    )

    Projection

    source
    pub(all) enum Projection {
      Star(Span)
      Items(Array[SelectItem])
      Value(Expr)
      Pivot(value~ : Expr, key~ : Expr)
    } derive(Eq, 
    Debug    )

    Quantifier

    source
    pub(all) struct Quantifier {
      kind : QuantifierKind
      span : Span
    } derive(Eq, 
    Debug    )

    QuantifierKind

    source
    pub(all) enum QuantifierKind {
      Plus
      Star
      Range(lower~ : Int, upper~ : Int?)
    } derive(Eq, 
    Debug    )

    Bounds are not negative, and upper >= lower.

    Query

    source
    pub(all) struct Query {
      with_ : Array[WithBinding]
      body : QueryBody
      order_by : Array[SortSpec]
      limit : Expr?
      offset : Expr?
      span : Span
    } derive(Eq, 
    Debug    )

    A query: an optional WITH, a body, and the clauses that apply to the whole body.

    Query::strip_spans

    source
    fn Query::strip_spans(self : Query) -> Query

    The same query with every span set to { start: 0, end: 0 }.

    QueryBody

    source
    pub(all) enum QueryBody {
      Select(Select)
      SetOp(SetOp)
      Expr(Expr)
      Table(Array[Identifier])
    } derive(Eq, 
    Debug    )

    Recovered

    source
    pub(all) struct Recovered {
      script : Script
      errors : Array[ParseError]
    } derive(Eq, 
    Debug    )

    The result of parse_script_recovering: the partial script and every error, in source order (spec M3d §3).

    Restrictor

    source
    pub(all) enum Restrictor {
      Walk
      Trail
      Acyclic
      Simple
    } derive(Eq, 
    Debug    )

    Script

    source
    pub(all) struct Script {
      statements : Array[Statement]
      comments : Array[Comment]
      span : Span
    } derive(Eq, 
    Debug    )

    The statements of a script, and the comments of its source in source order.

    Script::strip_spans

    source
    fn Script::strip_spans(self : Script) -> Script

    The same script with every span set to { start: 0, end: 0 }.

    Select

    source
    pub(all) struct Select {
      quantifier : SetQuantifier?
      projection : Projection
      from : FromItem?
      let_ : Array[LetBinding]
      where_ : Expr?
      group_by : GroupBy?
      having : Expr?
      span : Span
    } derive(Eq, 
    Debug    )

    A SELECT (or PIVOT) block.

    SelectItem

    source
    pub(all) enum SelectItem {
      Expr(Expr, as_~ : Identifier?, span~ : Span)
      AllFields(Expr, span~ : Span)
    } derive(Eq, 
    Debug    )

    Selector

    source
    pub(all) struct Selector {
      kind : SelectorKind
      span : Span
    } derive(Eq, 
    Debug    )

    SelectorKind

    source
    pub(all) enum SelectorKind {
      AnyShortest
      AllShortest
      Shortest
      Any(k~ : Int?)
      ShortestK(k~ : Int, group~ : Bool)
    } derive(Eq, 
    Debug    )

    Counts are not negative.

    SetOp

    source
    pub(all) struct SetOp {
      op : SetOpKind
      quantifier : SetQuantifier?
      outer : Bool
      corresponding : Corresponding?
      left : Query
      right : Query
      span : Span
    } derive(Eq, 
    Debug    )

    SetOpKind

    source
    pub(all) enum SetOpKind {
      Union
      Intersect
      Except
    } derive(Eq, 
    Debug    )

    SetQuantifier

    source
    pub(all) enum SetQuantifier {
      All
      Distinct
    } derive(Eq, 
    Debug    )

    SortOrder

    source
    pub(all) enum SortOrder {
      Asc
      Desc
    } derive(Eq, 
    Debug    )

    SortSpec

    source
    pub(all) struct SortSpec {
      expr : Expr
      order : SortOrder?
      nulls : NullsOrder?
      span : Span
    } derive(Eq, 
    Debug    )

    Span

    source
    pub(all) struct Span {
      start : Int
      end : Int
    } derive(Eq, 
    Debug    )

    A range of source text: UTF-16 code unit offsets, end exclusive.

    Span::line_column

    source
    fn Span::line_column(self : Span, source : String) -> ((Int, Int), (Int, Int))

    1-based (line, column) of the start and of the end of the span. Lines end at \n (a preceding \r belongs to the line); columns count UTF-16 code units.

    Span::merge

    source
    fn Span::merge(self : Span, other : Span) -> Span

    The smallest span that covers both spans.

    Statement

    source
    pub(all) enum Statement {
      Query(Query)
      Error(Span)
    } derive(Eq, 
    Debug    )

    A parsed statement. M2 parses queries (DQL).

    Statement::strip_spans

    source
    fn Statement::strip_spans(self : Statement) -> Statement

    The same statement with every span set to { start: 0, end: 0 }, so that == compares structure only.

    TrimSpec

    source
    pub(all) enum TrimSpec {
      Both
      Leading
      Trailing
    } derive(Eq, 
    Debug    )

    UnaryOp

    source
    pub(all) enum UnaryOp {
      Pos
      Neg
    } derive(Eq, 
    Debug    )

    WithBinding

    source
    pub(all) struct WithBinding {
      name : Identifier
      query : Query
      span : Span
    } derive(Eq, 
    Debug    )

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