uqa_sql/ast/
expressions.rs

1//
2// Unified Query Algebra
3//
4// Copyright (c) 2023-2026 Cognica, Inc.
5//
6
7use serde::{Deserialize, Serialize};
8use std::sync::atomic::{AtomicU64, Ordering};
9use uqa_core::Value;
10
11use super::{
12    FromClause, FunctionBinding, FunctionBody, MergeWhen, OnConflictAction, SelectStmt, Statement,
13    CTE,
14};
15
16/// Query-local identity for an executor-only row source. Parser-produced SQL
17/// never contains this identity, so internal row carriers cannot collide with
18/// user relation aliases.
19#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord, Serialize, Deserialize)]
20#[doc(hidden)]
21pub struct InternalRelationId(u64);
22
23impl InternalRelationId {
24    /// Allocate an opaque relation identity for an engine-injected row source.
25    #[must_use]
26    pub fn allocate() -> Self {
27        static NEXT_ID: AtomicU64 = AtomicU64::new(1);
28        let id = NEXT_ID
29            .fetch_update(Ordering::Relaxed, Ordering::Relaxed, |current| {
30                current.checked_add(1)
31            })
32            .expect("internal relation identity space exhausted");
33        Self(id)
34    }
35
36    /// Address one zero-based attribute of this internal relation.
37    #[must_use]
38    pub fn column(self, attribute: usize) -> InternalColumnRef {
39        InternalColumnRef {
40            relation: self,
41            attribute: u32::try_from(attribute).expect("internal relation attribute exceeds u32"),
42        }
43    }
44
45    #[must_use]
46    pub const fn raw(self) -> u64 {
47        self.0
48    }
49
50    #[must_use]
51    pub const fn from_raw(raw: u64) -> Self {
52        Self(raw)
53    }
54}
55
56/// Structural reference to an executor-only relation attribute. This is the
57/// UQA analogue of PostgreSQL's `Var(varno, varattno)` identity: it is never
58/// resolved through SQL text names.
59#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord, Serialize, Deserialize)]
60#[doc(hidden)]
61pub struct InternalColumnRef {
62    relation: InternalRelationId,
63    attribute: u32,
64}
65
66impl InternalColumnRef {
67    #[must_use]
68    pub const fn relation(self) -> InternalRelationId {
69        self.relation
70    }
71
72    #[must_use]
73    pub const fn attribute(self) -> usize {
74        self.attribute as usize
75    }
76
77    #[must_use]
78    pub const fn from_raw(relation: u64, attribute: u32) -> Self {
79        Self {
80            relation: InternalRelationId::from_raw(relation),
81            attribute,
82        }
83    }
84}
85
86#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
87pub struct Projection {
88    pub expr: Expr,
89    pub alias: Option<String>,
90}
91
92#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
93pub struct OrderBy {
94    pub expr: Expr,
95    pub descending: bool,
96    /// `NULLS FIRST` / `NULLS LAST` placement. `None` means the
97    /// SQL-standard default - `NULLS LAST` for ASC and `NULLS FIRST`
98    /// for DESC. Mirrors `PostgreSQL` semantics.
99    pub nulls: Option<NullsOrder>,
100}
101
102#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
103pub enum NullsOrder {
104    First,
105    Last,
106}
107
108#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
109pub struct WindowSpec {
110    /// Named window referenced by this specification while the SQL compiler resolves a `WINDOW` clause. Compiler-produced plans clear this field before lowering into the unified scalar IR.
111    #[serde(default, skip_serializing_if = "Option::is_none")]
112    pub reference: Option<WindowReference>,
113    pub partition_by: Vec<Expr>,
114    pub order_by: Vec<OrderBy>,
115    /// `ROWS` / `RANGE` frame, or `None` when not specified (defaults
116    /// to `RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW`).
117    pub frame: Option<WindowFrame>,
118}
119
120#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
121pub struct WindowReference {
122    pub name: String,
123    pub kind: WindowReferenceKind,
124}
125
126#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
127pub enum WindowReferenceKind {
128    /// `OVER window_name` uses the named definition directly, including its frame.
129    Direct,
130    /// `OVER (window_name ...)` or `WINDOW child AS (parent ...)` copies and may extend a frameless definition.
131    Copy,
132}
133
134#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
135pub struct WindowFrame {
136    pub mode: FrameMode,
137    pub start: FrameBound,
138    pub end: FrameBound,
139}
140
141#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
142pub enum FrameMode {
143    Rows,
144    Range,
145    Groups,
146}
147
148#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
149pub enum FrameBound {
150    UnboundedPreceding,
151    UnboundedFollowing,
152    CurrentRow,
153    Preceding(Box<Expr>),
154    Following(Box<Expr>),
155}
156
157/// Scalar expression nodes the compiler handles.
158#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
159pub enum Expr {
160    Star,
161    /// Relation-qualified wildcard projection (`table.*` or `alias.*`).
162    QualifiedStar(String),
163    /// `DEFAULT` in an INSERT/UPDATE assignment. This is a mutation marker,
164    /// not a scalar value, and must be resolved against the target column
165    /// before expression evaluation.
166    Default,
167    /// Unqualified column reference (`col`).
168    Column(String),
169    /// Qualified column reference (`table.col` or `alias.col`).
170    QualifiedColumn {
171        qualifier: String,
172        column: String,
173    },
174    /// Engine-injected structural column reference. SQL parsing never emits
175    /// this variant and SQL name binding must not rewrite it.
176    #[doc(hidden)]
177    InternalColumn(InternalColumnRef),
178    Literal(Value),
179    /// A positional bind parameter (`$1`, `$2`, ...).
180    Param(usize),
181    /// `text_match(...)`, `knn_match(...)`, etc. - dispatched through
182    /// the function registry.
183    Func {
184        name: String,
185        #[serde(default, skip_serializing_if = "Option::is_none")]
186        binding: Option<FunctionBinding>,
187        args: Vec<Expr>,
188        /// `func(DISTINCT expr)` - only meaningful for aggregate
189        /// functions. Mirrors `PostgreSQL`'s `agg_distinct`.
190        distinct: bool,
191        /// `func(expr ORDER BY ...)` - only meaningful for ordered
192        /// aggregates (`STRING_AGG`, `ARRAY_AGG`, `PERCENTILE_*`).
193        order_by: Vec<OrderBy>,
194        /// `func(...) FILTER (WHERE expr)` - aggregate-level row filter.
195        filter: Option<Box<Expr>>,
196    },
197    /// `ARRAY[1.0, 2.0, ...]` literal - currently restricted to numeric
198    /// elements (vectors).
199    Array(Vec<Expr>),
200    /// Anonymous SQL row constructor (`ROW(...)` or `(a, b)`).
201    Row(Vec<Expr>),
202    /// `lhs op rhs` - comparison or arithmetic.
203    Binary {
204        op: BinaryOp,
205        lhs: Box<Expr>,
206        rhs: Box<Expr>,
207    },
208    /// `PostgreSQL` prefix `-`, kept distinct from binary subtraction so the
209    /// operand's declared numeric width and overflow behavior survive lowering.
210    UnaryMinus(Box<Expr>),
211    /// `NOT expr`.
212    Not(Box<Expr>),
213    /// `cond_1 AND cond_2 AND ...` (n-ary).
214    And(Vec<Expr>),
215    /// `cond_1 OR cond_2 OR ...` (n-ary).
216    Or(Vec<Expr>),
217    /// `expr IS NULL` / `expr IS NOT NULL`.
218    IsNull {
219        expr: Box<Expr>,
220        negated: bool,
221    },
222    /// `expr BETWEEN low AND high`.
223    Between {
224        expr: Box<Expr>,
225        low: Box<Expr>,
226        high: Box<Expr>,
227    },
228    /// `expr IN (a, b, c)` literal list.
229    InList {
230        expr: Box<Expr>,
231        list: Vec<Expr>,
232        negated: bool,
233    },
234    /// `func(args) OVER (PARTITION BY ... ORDER BY ...)`.
235    WindowCall {
236        name: String,
237        args: Vec<Expr>,
238        spec: WindowSpec,
239    },
240    /// `CASE [base] WHEN cond THEN result ... [ELSE default] END`.
241    /// `base` lifts simple-form `CASE expr WHEN val THEN ...` into an
242    /// optional comparison anchor; searched-form `CASE WHEN cond ...`
243    /// leaves it `None`.
244    Case {
245        base: Option<Box<Expr>>,
246        when: Vec<(Expr, Expr)>,
247        else_branch: Option<Box<Expr>>,
248    },
249    /// `CAST(expr AS type)`. The type name is preserved verbatim so
250    /// the evaluator can apply the correct coercion.
251    Cast {
252        expr: Box<Expr>,
253        ty: String,
254    },
255    /// `(SELECT ...)` scalar subquery: yields a single row / single
256    /// column value at evaluation time.
257    ScalarSubquery(Box<SelectStmt>),
258    /// `EXISTS (SELECT ...)` -- truthy when the body produces at
259    /// least one row.
260    Exists {
261        body: Box<SelectStmt>,
262        negated: bool,
263    },
264    /// `expr [NOT] IN (SELECT ...)` set membership against a
265    /// subquery. Evaluator runs the body once per top-level
266    /// expression and tests membership.
267    InSubquery {
268        expr: Box<Expr>,
269        body: Box<SelectStmt>,
270        negated: bool,
271    },
272}
273
274impl Expr {
275    pub fn qualified_column(qualifier: impl Into<String>, column: impl Into<String>) -> Self {
276        Self::QualifiedColumn {
277            qualifier: qualifier.into(),
278            column: column.into(),
279        }
280    }
281
282    /// Upgrade compiler-owned function markers deserialized from catalogs
283    /// written by releases through 0.1.6.
284    #[doc(hidden)]
285    #[expect(
286        clippy::too_many_lines,
287        reason = "exhaustive AST migration preserves every serialized variant"
288    )]
289    pub fn upgrade_legacy_serialized_dispatches(&mut self) -> bool {
290        let mut changed = false;
291        match self {
292            Self::Func {
293                name,
294                binding,
295                args,
296                order_by,
297                filter,
298                ..
299            } => {
300                for argument in args {
301                    changed |= argument.upgrade_legacy_serialized_dispatches();
302                }
303                for order in order_by {
304                    changed |= order.expr.upgrade_legacy_serialized_dispatches();
305                }
306                if let Some(filter) = filter {
307                    changed |= filter.upgrade_legacy_serialized_dispatches();
308                }
309                changed |=
310                    super::FunctionBinding::upgrade_legacy_serialized_dispatch(name, binding);
311            }
312            Self::Array(items) | Self::Row(items) | Self::And(items) | Self::Or(items) => {
313                for item in items {
314                    changed |= item.upgrade_legacy_serialized_dispatches();
315                }
316            }
317            Self::Binary { lhs, rhs, .. } => {
318                changed |= lhs.upgrade_legacy_serialized_dispatches();
319                changed |= rhs.upgrade_legacy_serialized_dispatches();
320            }
321            Self::UnaryMinus(inner)
322            | Self::Not(inner)
323            | Self::IsNull { expr: inner, .. }
324            | Self::Cast { expr: inner, .. } => {
325                changed |= inner.upgrade_legacy_serialized_dispatches();
326            }
327            Self::Between { expr, low, high } => {
328                changed |= expr.upgrade_legacy_serialized_dispatches();
329                changed |= low.upgrade_legacy_serialized_dispatches();
330                changed |= high.upgrade_legacy_serialized_dispatches();
331            }
332            Self::InList { expr, list, .. } => {
333                changed |= expr.upgrade_legacy_serialized_dispatches();
334                for item in list {
335                    changed |= item.upgrade_legacy_serialized_dispatches();
336                }
337            }
338            Self::WindowCall { args, spec, .. } => {
339                for argument in args {
340                    changed |= argument.upgrade_legacy_serialized_dispatches();
341                }
342                for partition in &mut spec.partition_by {
343                    changed |= partition.upgrade_legacy_serialized_dispatches();
344                }
345                for order in &mut spec.order_by {
346                    changed |= order.expr.upgrade_legacy_serialized_dispatches();
347                }
348                if let Some(frame) = &mut spec.frame {
349                    for bound in [&mut frame.start, &mut frame.end] {
350                        match bound {
351                            FrameBound::Preceding(expression)
352                            | FrameBound::Following(expression) => {
353                                changed |= expression.upgrade_legacy_serialized_dispatches();
354                            }
355                            FrameBound::UnboundedPreceding
356                            | FrameBound::UnboundedFollowing
357                            | FrameBound::CurrentRow => {}
358                        }
359                    }
360                }
361            }
362            Self::Case {
363                base,
364                when,
365                else_branch,
366            } => {
367                if let Some(base) = base {
368                    changed |= base.upgrade_legacy_serialized_dispatches();
369                }
370                for (condition, result) in when {
371                    changed |= condition.upgrade_legacy_serialized_dispatches();
372                    changed |= result.upgrade_legacy_serialized_dispatches();
373                }
374                if let Some(branch) = else_branch {
375                    changed |= branch.upgrade_legacy_serialized_dispatches();
376                }
377            }
378            Self::InSubquery { expr, body, .. } => {
379                changed |= expr.upgrade_legacy_serialized_dispatches();
380                changed |= body.upgrade_legacy_serialized_dispatches();
381            }
382            Self::ScalarSubquery(body) | Self::Exists { body, .. } => {
383                changed |= body.upgrade_legacy_serialized_dispatches();
384            }
385            Self::Default
386            | Self::Star
387            | Self::QualifiedStar(_)
388            | Self::Column(_)
389            | Self::QualifiedColumn { .. }
390            | Self::InternalColumn(_)
391            | Self::Literal(_)
392            | Self::Param(_) => {}
393        }
394        changed
395    }
396
397    /// True when this expression tree contains a window function call.
398    #[must_use]
399    pub fn contains_window(&self) -> bool {
400        self.any_node(&|node| matches!(node, Self::WindowCall { .. }))
401    }
402
403    /// True when this expression tree contains a built-in aggregate call.
404    #[must_use]
405    pub fn contains_aggregate(&self) -> bool {
406        self.any_node(
407            &|node| matches!(node, Self::Func { name, .. } if is_builtin_aggregate_function(name)),
408        )
409    }
410
411    /// True when this expression contains a column whose owning relation can only be determined after catalog schemas have been bound.
412    #[must_use]
413    pub fn contains_unqualified_column(&self) -> bool {
414        self.any_node(&|node| matches!(node, Self::Column(_)))
415    }
416
417    /// True when this expression contains a function whose strictness cannot be decided without an engine catalog.
418    #[must_use]
419    pub fn contains_function_with_unknown_strictness(&self) -> bool {
420        self.any_node(&|node| {
421            matches!(
422                node,
423                Self::Func {
424                    name,
425                    args,
426                    binding,
427                    ..
428                } if crate::expr::bound_scalar_function_strictness(
429                    name,
430                    binding.as_ref(),
431                    args.len(),
432                )
433                .is_none()
434            )
435        })
436    }
437
438    /// Whether `hit` matches this node or any scalar node below it. Subquery bodies are opaque because they own independent query trees.
439    #[must_use]
440    pub fn any_node(&self, hit: &dyn Fn(&Self) -> bool) -> bool {
441        if hit(self) {
442            return true;
443        }
444        match self {
445            Self::Func {
446                args,
447                order_by,
448                filter,
449                ..
450            } => {
451                args.iter().any(|arg| arg.any_node(hit))
452                    || order_by.iter().any(|order| order.expr.any_node(hit))
453                    || filter.as_deref().is_some_and(|filter| filter.any_node(hit))
454            }
455            Self::Array(items) | Self::Row(items) | Self::And(items) | Self::Or(items) => {
456                items.iter().any(|item| item.any_node(hit))
457            }
458            Self::UnaryMinus(expr) | Self::Not(expr) | Self::Cast { expr, .. } => {
459                expr.any_node(hit)
460            }
461            Self::Binary { lhs, rhs, .. } => lhs.any_node(hit) || rhs.any_node(hit),
462            Self::IsNull { expr, .. } | Self::InSubquery { expr, .. } => expr.any_node(hit),
463            Self::Between { expr, low, high } => {
464                expr.any_node(hit) || low.any_node(hit) || high.any_node(hit)
465            }
466            Self::InList { expr, list, .. } => {
467                expr.any_node(hit) || list.iter().any(|item| item.any_node(hit))
468            }
469            Self::Case {
470                base,
471                when,
472                else_branch,
473            } => {
474                base.as_deref().is_some_and(|base| base.any_node(hit))
475                    || when
476                        .iter()
477                        .any(|(condition, result)| condition.any_node(hit) || result.any_node(hit))
478                    || else_branch
479                        .as_deref()
480                        .is_some_and(|branch| branch.any_node(hit))
481            }
482            Self::WindowCall { .. }
483            | Self::Star
484            | Self::QualifiedStar(_)
485            | Self::Default
486            | Self::Column(_)
487            | Self::QualifiedColumn { .. }
488            | Self::InternalColumn(_)
489            | Self::Literal(_)
490            | Self::Param(_)
491            | Self::ScalarSubquery(_)
492            | Self::Exists { .. } => false,
493        }
494    }
495}
496
497fn upgrade_exprs(expressions: &mut [Expr]) -> bool {
498    expressions.iter_mut().fold(false, |changed, expression| {
499        expression.upgrade_legacy_serialized_dispatches() | changed
500    })
501}
502
503fn upgrade_rows(rows: &mut [Vec<Expr>]) -> bool {
504    rows.iter_mut()
505        .fold(false, |changed, row| upgrade_exprs(row) | changed)
506}
507
508fn upgrade_optional(expression: &mut Option<Expr>) -> bool {
509    expression
510        .as_mut()
511        .is_some_and(Expr::upgrade_legacy_serialized_dispatches)
512}
513
514fn upgrade_projections(projections: &mut [Projection]) -> bool {
515    projections.iter_mut().fold(false, |changed, projection| {
516        projection.expr.upgrade_legacy_serialized_dispatches() | changed
517    })
518}
519
520fn upgrade_assignments(assignments: &mut [(String, Expr)]) -> bool {
521    assignments
522        .iter_mut()
523        .fold(false, |changed, (_, expression)| {
524            expression.upgrade_legacy_serialized_dispatches() | changed
525        })
526}
527
528fn upgrade_ctes(ctes: &mut [CTE]) -> bool {
529    ctes.iter_mut().fold(false, |mut changed, cte| {
530        if let Some(cycle) = &mut cte.cycle {
531            changed |= cycle.mark_value.upgrade_legacy_serialized_dispatches();
532            changed |= cycle.mark_default.upgrade_legacy_serialized_dispatches();
533        }
534        changed | cte.query.upgrade_legacy_serialized_dispatches()
535    })
536}
537
538impl FromClause {
539    fn upgrade_legacy_serialized_dispatches(&mut self) -> bool {
540        match self {
541            Self::Table { .. } => false,
542            Self::Join {
543                left, right, on, ..
544            } => {
545                left.upgrade_legacy_serialized_dispatches()
546                    | right.upgrade_legacy_serialized_dispatches()
547                    | upgrade_optional(on)
548            }
549            Self::Values { rows, .. } => upgrade_rows(rows),
550            Self::Function { args, .. } => upgrade_exprs(args),
551            Self::FunctionGroup { functions, .. } => {
552                functions.iter_mut().fold(false, |changed, function| {
553                    upgrade_exprs(&mut function.args) | changed
554                })
555            }
556            Self::Subquery { body, .. } => body.upgrade_legacy_serialized_dispatches(),
557        }
558    }
559}
560
561impl SelectStmt {
562    /// Upgrade every legacy compiler dispatch marker in this complete query tree.
563    #[doc(hidden)]
564    pub fn upgrade_legacy_serialized_dispatches(&mut self) -> bool {
565        let mut changed = upgrade_projections(&mut self.projections);
566        changed |= upgrade_rows(&mut self.values);
567        if let Some(from) = &mut self.from {
568            changed |= from.upgrade_legacy_serialized_dispatches();
569        }
570        changed |= upgrade_optional(&mut self.r#where);
571        changed |= upgrade_exprs(&mut self.group_by);
572        for grouping_set in &mut self.grouping_sets {
573            changed |= upgrade_exprs(grouping_set);
574        }
575        changed |= upgrade_optional(&mut self.having);
576        for order in &mut self.order_by {
577            changed |= order.expr.upgrade_legacy_serialized_dispatches();
578        }
579        changed |= upgrade_optional(&mut self.limit);
580        changed |= upgrade_optional(&mut self.offset);
581        changed |= upgrade_ctes(&mut self.with);
582        if let Some(set_operation) = &mut self.set_op {
583            if let Some(left) = &mut set_operation.left {
584                changed |= left.upgrade_legacy_serialized_dispatches();
585            }
586            changed |= set_operation.right.upgrade_legacy_serialized_dispatches();
587            for order in &mut set_operation.combined_order_by {
588                changed |= order.expr.upgrade_legacy_serialized_dispatches();
589            }
590            changed |= upgrade_optional(&mut set_operation.combined_limit);
591            changed |= upgrade_optional(&mut set_operation.combined_offset);
592        }
593        changed | upgrade_exprs(&mut self.distinct_on)
594    }
595}
596
597impl MergeWhen {
598    fn upgrade_legacy_serialized_dispatches(&mut self) -> bool {
599        match self {
600            Self::UpdateMatched {
601                condition,
602                assignments,
603            }
604            | Self::UpdateNotMatchedBySource {
605                condition,
606                assignments,
607            } => upgrade_optional(condition) | upgrade_assignments(assignments),
608            Self::InsertNotMatched {
609                condition, values, ..
610            } => upgrade_optional(condition) | upgrade_exprs(values),
611            Self::DeleteMatched { condition }
612            | Self::DeleteNotMatchedBySource { condition }
613            | Self::NothingMatched { condition }
614            | Self::NothingNotMatched { condition }
615            | Self::NothingNotMatchedBySource { condition } => upgrade_optional(condition),
616        }
617    }
618}
619
620impl Statement {
621    /// Upgrade legacy compiler dispatch markers without reparsing SQL or changing catalog-bound relation identities.
622    #[doc(hidden)]
623    #[expect(
624        clippy::too_many_lines,
625        reason = "exhaustive AST migration preserves every serialized variant"
626    )]
627    pub fn upgrade_legacy_serialized_dispatches(&mut self) -> bool {
628        match self {
629            Self::Select(select) => select.upgrade_legacy_serialized_dispatches(),
630            Self::Insert(insert) => {
631                let mut changed = upgrade_ctes(&mut insert.with);
632                changed |= upgrade_rows(&mut insert.rows);
633                if let Some(source) = &mut insert.select_source {
634                    changed |= source.upgrade_legacy_serialized_dispatches();
635                }
636                if let Some(conflict) = &mut insert.on_conflict {
637                    for expression in &mut conflict.expressions {
638                        changed |= expression.upgrade_legacy_serialized_dispatches();
639                    }
640                    changed |= conflict
641                        .predicate
642                        .as_deref_mut()
643                        .is_some_and(Expr::upgrade_legacy_serialized_dispatches);
644                    if let OnConflictAction::Update {
645                        assignments,
646                        r#where,
647                    } = &mut conflict.action
648                    {
649                        changed |= upgrade_assignments(assignments);
650                        changed |= r#where
651                            .as_deref_mut()
652                            .is_some_and(Expr::upgrade_legacy_serialized_dispatches);
653                    }
654                }
655                changed | upgrade_projections(&mut insert.returning)
656            }
657            Self::Update(update) => {
658                let mut changed = upgrade_assignments(&mut update.assignments);
659                changed |= upgrade_optional(&mut update.r#where);
660                changed |= upgrade_ctes(&mut update.with);
661                if let Some(from) = &mut update.from {
662                    changed |= from.upgrade_legacy_serialized_dispatches();
663                }
664                changed | upgrade_projections(&mut update.returning)
665            }
666            Self::Delete(delete) => {
667                let mut changed = upgrade_optional(&mut delete.r#where);
668                changed |= upgrade_ctes(&mut delete.with);
669                if let Some(using) = &mut delete.using {
670                    changed |= using.upgrade_legacy_serialized_dispatches();
671                }
672                changed | upgrade_projections(&mut delete.returning)
673            }
674            Self::CreateView { body, .. }
675            | Self::CreateMaterializedView { body, .. }
676            | Self::CreateTableAs { body, .. } => body.upgrade_legacy_serialized_dispatches(),
677            Self::DeclareCursor(cursor) => cursor.query.upgrade_legacy_serialized_dispatches(),
678            Self::Explain { body, .. } | Self::Prepare { body, .. } => {
679                body.upgrade_legacy_serialized_dispatches()
680            }
681            Self::Execute { params, .. } | Self::Call { args: params, .. } => upgrade_exprs(params),
682            Self::Values { rows } => upgrade_rows(rows),
683            Self::Merge(merge) => {
684                let mut changed = merge.source.upgrade_legacy_serialized_dispatches();
685                changed |= merge.join_condition.upgrade_legacy_serialized_dispatches();
686                for clause in &mut merge.when_clauses {
687                    changed |= clause.upgrade_legacy_serialized_dispatches();
688                }
689                changed | upgrade_projections(&mut merge.returning)
690            }
691            Self::CreateFunction(definition) => {
692                let mut changed = definition
693                    .params
694                    .iter_mut()
695                    .fold(false, |changed, parameter| {
696                        parameter
697                            .default
698                            .as_mut()
699                            .is_some_and(Expr::upgrade_legacy_serialized_dispatches)
700                            | changed
701                    });
702                if let FunctionBody::Statements(statements) = &mut definition.body {
703                    for statement in statements {
704                        changed |= statement.upgrade_legacy_serialized_dispatches();
705                    }
706                }
707                changed
708            }
709            Self::CreateTrigger(trigger) => upgrade_optional(&mut trigger.when),
710            Self::CreateRule(rule) => {
711                let mut changed = upgrade_optional(&mut rule.condition);
712                for action in &mut rule.actions {
713                    changed |= action.upgrade_legacy_serialized_dispatches();
714                }
715                changed
716            }
717            Self::CreateTable(_)
718            | Self::CreateTableIfNotExists(_)
719            | Self::CreateIndex(_)
720            | Self::Drop(_)
721            | Self::AlterTable(_)
722            | Self::AlterForeignTable(_)
723            | Self::AlterView(_)
724            | Self::RefreshMaterializedView { .. }
725            | Self::CreateSchema { .. }
726            | Self::Notify { .. }
727            | Self::Listen { .. }
728            | Self::Unlisten { .. }
729            | Self::SetVariable { .. }
730            | Self::ResetVariable { .. }
731            | Self::ResetAllVariables
732            | Self::SetConstraints { .. }
733            | Self::ShowVariable { .. }
734            | Self::Discard { .. }
735            | Self::Load { .. }
736            | Self::Analyze { .. }
737            | Self::Vacuum(_)
738            | Self::Truncate { .. }
739            | Self::Transaction(_)
740            | Self::FetchCursor(_)
741            | Self::CloseCursor { .. }
742            | Self::CreateSequence(_)
743            | Self::AlterSequence(_)
744            | Self::Deallocate { .. }
745            | Self::CreateForeignServer(_)
746            | Self::CreateForeignTable(_)
747            | Self::CreateForeignTableIfNotExists(_)
748            | Self::DropFunction(_)
749            | Self::AlterRoutine(_)
750            | Self::AlterRoutineOwner(_)
751            | Self::RenameRoutine(_)
752            | Self::GrantRoutine(_)
753            | Self::GrantTable(_)
754            | Self::GrantSequence(_)
755            | Self::GrantDatabase(_)
756            | Self::GrantSchema(_)
757            | Self::GrantRole(_)
758            | Self::CreateRole(_)
759            | Self::AlterRole(_)
760            | Self::DropRole(_)
761            | Self::DropTrigger(_)
762            | Self::DropRule(_)
763            | Self::DoBlock { .. } => false,
764        }
765    }
766}
767
768/// Return whether `name` is a built-in aggregate understood by the planner.
769#[must_use]
770pub fn is_builtin_aggregate_function(name: &str) -> bool {
771    matches!(
772        name.to_ascii_lowercase().as_str(),
773        "count"
774            | "sum"
775            | "avg"
776            | "min"
777            | "max"
778            | "string_agg"
779            | "array_agg"
780            | "bool_and"
781            | "bool_or"
782            | "stddev"
783            | "stddev_samp"
784            | "stddev_pop"
785            | "variance"
786            | "var_samp"
787            | "var_pop"
788            | "percentile_cont"
789            | "percentile_disc"
790            | "mode"
791            | "json_agg"
792            | "jsonb_agg"
793            | "json_object_agg"
794            | "jsonb_object_agg"
795    )
796}
797
798#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
799pub enum BinaryOp {
800    Equal,
801    NotEqual,
802    Less,
803    LessEqual,
804    Greater,
805    GreaterEqual,
806    Add,
807    Subtract,
808    Multiply,
809    Divide,
810}
811
812/// `Expr` restricted to value-producing forms used by `INSERT` rows.
813pub type ValueExpr = Expr;
uqa_sql/ast/expressions.rs

uqa_sql/ast/
expressions.rs
