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use std::collections::BTreeSet;
use std::fmt::{
Debug,
Formatter,
};
use mentat_core::{
Entid,
TypedValue,
ValueRc,
ValueType,
ValueTypeSet,
};
use mentat_query::{
Direction,
FindSpec,
Keyword,
Limit,
Order,
SrcVar,
Variable,
WhereClause,
};
#[derive(PartialEq, Eq, Clone, Copy, Debug)]
pub enum DatomsTable {
Datoms,
FulltextValues,
FulltextDatoms,
AllDatoms,
Computed(usize),
Transactions,
}
#[derive(PartialEq, Eq, Debug)]
pub enum ComputedTable {
Subquery(::clauses::ConjoiningClauses),
Union {
projection: BTreeSet<Variable>,
type_extraction: BTreeSet<Variable>,
arms: Vec<::clauses::ConjoiningClauses>,
},
NamedValues {
names: Vec<Variable>,
values: Vec<TypedValue>,
},
}
impl DatomsTable {
pub fn name(&self) -> &'static str {
match *self {
DatomsTable::Datoms => "datoms",
DatomsTable::FulltextValues => "fulltext_values",
DatomsTable::FulltextDatoms => "fulltext_datoms",
DatomsTable::AllDatoms => "all_datoms",
DatomsTable::Computed(_) => "c",
DatomsTable::Transactions => "transactions",
}
}
}
pub trait ColumnName {
fn column_name(&self) -> String;
}
#[derive(PartialEq, Eq, Clone)]
pub enum DatomsColumn {
Entity,
Attribute,
Value,
Tx,
ValueTypeTag,
}
#[derive(PartialEq, Eq, Clone)]
pub enum FulltextColumn {
Rowid,
Text,
}
#[derive(PartialEq, Eq, Clone)]
pub enum TransactionsColumn {
Entity,
Attribute,
Value,
Tx,
Added,
ValueTypeTag,
}
#[derive(PartialEq, Eq, Clone)]
pub enum VariableColumn {
Variable(Variable),
VariableTypeTag(Variable),
}
#[derive(PartialEq, Eq, Clone)]
pub enum Column {
Fixed(DatomsColumn),
Fulltext(FulltextColumn),
Variable(VariableColumn),
Transactions(TransactionsColumn),
}
impl From<DatomsColumn> for Column {
fn from(from: DatomsColumn) -> Column {
Column::Fixed(from)
}
}
impl From<VariableColumn> for Column {
fn from(from: VariableColumn) -> Column {
Column::Variable(from)
}
}
impl From<TransactionsColumn> for Column {
fn from(from: TransactionsColumn) -> Column {
Column::Transactions(from)
}
}
impl DatomsColumn {
pub fn as_str(&self) -> &'static str {
use self::DatomsColumn::*;
match *self {
Entity => "e",
Attribute => "a",
Value => "v",
Tx => "tx",
ValueTypeTag => "value_type_tag",
}
}
pub fn associated_type_tag_column(&self) -> Option<DatomsColumn> {
use self::DatomsColumn::*;
match *self {
Value => Some(ValueTypeTag),
_ => None,
}
}
}
impl ColumnName for DatomsColumn {
fn column_name(&self) -> String {
self.as_str().to_string()
}
}
impl ColumnName for VariableColumn {
fn column_name(&self) -> String {
match self {
&VariableColumn::Variable(ref v) => v.to_string(),
&VariableColumn::VariableTypeTag(ref v) => format!("{}_value_type_tag", v.as_str()),
}
}
}
impl Debug for VariableColumn {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
match self {
&VariableColumn::Variable(ref v) => write!(f, "{}", v.as_str()),
&VariableColumn::VariableTypeTag(ref v) => write!(f, "{}_value_type_tag", v.as_str()),
}
}
}
impl Debug for DatomsColumn {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
write!(f, "{}", self.as_str())
}
}
impl Debug for Column {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
match self {
&Column::Fixed(ref c) => c.fmt(f),
&Column::Fulltext(ref c) => c.fmt(f),
&Column::Variable(ref v) => v.fmt(f),
&Column::Transactions(ref t) => t.fmt(f),
}
}
}
impl FulltextColumn {
pub fn as_str(&self) -> &'static str {
use self::FulltextColumn::*;
match *self {
Rowid => "rowid",
Text => "text",
}
}
}
impl ColumnName for FulltextColumn {
fn column_name(&self) -> String {
self.as_str().to_string()
}
}
impl Debug for FulltextColumn {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
write!(f, "{}", self.as_str())
}
}
impl TransactionsColumn {
pub fn as_str(&self) -> &'static str {
use self::TransactionsColumn::*;
match *self {
Entity => "e",
Attribute => "a",
Value => "v",
Tx => "tx",
Added => "added",
ValueTypeTag => "value_type_tag",
}
}
pub fn associated_type_tag_column(&self) -> Option<TransactionsColumn> {
use self::TransactionsColumn::*;
match *self {
Value => Some(ValueTypeTag),
_ => None,
}
}
}
impl ColumnName for TransactionsColumn {
fn column_name(&self) -> String {
self.as_str().to_string()
}
}
impl Debug for TransactionsColumn {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
write!(f, "{}", self.as_str())
}
}
pub type TableAlias = String;
#[derive(PartialEq, Eq, Clone)]
pub struct SourceAlias(pub DatomsTable, pub TableAlias);
impl Debug for SourceAlias {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
write!(f, "SourceAlias({:?}, {})", self.0, self.1)
}
}
#[derive(PartialEq, Eq, Clone)]
pub struct QualifiedAlias(pub TableAlias, pub Column);
impl Debug for QualifiedAlias {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
write!(f, "{}.{:?}", self.0, self.1)
}
}
impl QualifiedAlias {
pub fn new<C: Into<Column>>(table: TableAlias, column: C) -> Self {
QualifiedAlias(table, column.into())
}
pub fn for_associated_type_tag(&self) -> Option<QualifiedAlias> {
match self.1 {
Column::Fixed(ref c) => c.associated_type_tag_column().map(Column::Fixed),
Column::Fulltext(_) => None,
Column::Variable(_) => None,
Column::Transactions(ref c) => c.associated_type_tag_column().map(Column::Transactions),
}.map(|d| QualifiedAlias(self.0.clone(), d))
}
}
#[derive(PartialEq, Eq, Clone)]
pub enum QueryValue {
Column(QualifiedAlias),
Entid(Entid),
TypedValue(TypedValue),
PrimitiveLong(i64),
}
impl Debug for QueryValue {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
use self::QueryValue::*;
match self {
&Column(ref qa) => {
write!(f, "{:?}", qa)
},
&Entid(ref entid) => {
write!(f, "entity({:?})", entid)
},
&TypedValue(ref typed_value) => {
write!(f, "value({:?})", typed_value)
},
&PrimitiveLong(value) => {
write!(f, "primitive({:?})", value)
},
}
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct OrderBy(pub Direction, pub VariableColumn);
impl From<Order> for OrderBy {
fn from(item: Order) -> OrderBy {
let Order(direction, variable) = item;
OrderBy(direction, VariableColumn::Variable(variable))
}
}
#[derive(Copy, Clone, PartialEq, Eq)]
pub enum Inequality {
LessThan,
LessThanOrEquals,
GreaterThan,
GreaterThanOrEquals,
NotEquals,
Unpermute,
Differ,
TxAfter,
TxBefore,
}
impl Inequality {
pub fn to_sql_operator(self) -> &'static str {
use self::Inequality::*;
match self {
LessThan => "<",
LessThanOrEquals => "<=",
GreaterThan => ">",
GreaterThanOrEquals => ">=",
NotEquals => "<>",
Unpermute => "<",
Differ => "<>",
TxAfter => ">",
TxBefore => "<",
}
}
pub fn from_datalog_operator(s: &str) -> Option<Inequality> {
match s {
"<" => Some(Inequality::LessThan),
"<=" => Some(Inequality::LessThanOrEquals),
">" => Some(Inequality::GreaterThan),
">=" => Some(Inequality::GreaterThanOrEquals),
"!=" => Some(Inequality::NotEquals),
"unpermute" => Some(Inequality::Unpermute),
"differ" => Some(Inequality::Differ),
"tx-after" => Some(Inequality::TxAfter),
"tx-before" => Some(Inequality::TxBefore),
_ => None,
}
}
pub fn supported_types(&self) -> ValueTypeSet {
use self::Inequality::*;
match self {
&LessThan |
&LessThanOrEquals |
&GreaterThan |
&GreaterThanOrEquals |
&NotEquals => {
let mut ts = ValueTypeSet::of_numeric_types();
ts.insert(ValueType::Instant);
ts
},
&Unpermute |
&Differ |
&TxAfter |
&TxBefore => {
ValueTypeSet::of_one(ValueType::Ref)
},
}
}
}
impl Debug for Inequality {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
use self::Inequality::*;
f.write_str(match self {
&LessThan => "<",
&LessThanOrEquals => "<=",
&GreaterThan => ">",
&GreaterThanOrEquals => ">=",
&NotEquals => "!=",
&Unpermute => "<",
&Differ => "<>",
&TxAfter => ">",
&TxBefore => "<",
})
}
}
#[derive(PartialEq, Eq)]
pub enum ColumnConstraint {
Equals(QualifiedAlias, QueryValue),
Inequality {
operator: Inequality,
left: QueryValue,
right: QueryValue,
},
HasTypes {
value: TableAlias,
value_types: ValueTypeSet,
check_value: bool,
},
NotExists(ComputedTable),
Matches(QualifiedAlias, QueryValue),
}
impl ColumnConstraint {
pub fn has_unit_type(value: TableAlias, value_type: ValueType) -> ColumnConstraint {
ColumnConstraint::HasTypes {
value,
value_types: ValueTypeSet::of_one(value_type),
check_value: false,
}
}
}
#[derive(PartialEq, Eq, Debug)]
pub enum ColumnConstraintOrAlternation {
Constraint(ColumnConstraint),
Alternation(ColumnAlternation),
}
impl From<ColumnConstraint> for ColumnConstraintOrAlternation {
fn from(thing: ColumnConstraint) -> Self {
ColumnConstraintOrAlternation::Constraint(thing)
}
}
#[derive(PartialEq, Eq)]
pub struct ColumnIntersection(pub Vec<ColumnConstraintOrAlternation>);
impl From<Vec<ColumnConstraint>> for ColumnIntersection {
fn from(thing: Vec<ColumnConstraint>) -> Self {
ColumnIntersection(thing.into_iter().map(|x| x.into()).collect())
}
}
impl Default for ColumnIntersection {
fn default() -> Self {
ColumnIntersection(vec![])
}
}
impl IntoIterator for ColumnIntersection {
type Item = ColumnConstraintOrAlternation;
type IntoIter = ::std::vec::IntoIter<ColumnConstraintOrAlternation>;
fn into_iter(self) -> Self::IntoIter {
self.0.into_iter()
}
}
impl ColumnIntersection {
#[inline]
pub fn len(&self) -> usize {
self.0.len()
}
#[inline]
pub fn is_empty(&self) -> bool {
self.0.is_empty()
}
#[inline]
pub fn add(&mut self, constraint: ColumnConstraintOrAlternation) {
self.0.push(constraint);
}
#[inline]
pub fn add_intersection(&mut self, constraint: ColumnConstraint) {
self.add(ColumnConstraintOrAlternation::Constraint(constraint));
}
pub fn append(&mut self, other: &mut Self) {
self.0.append(&mut other.0)
}
}
#[derive(PartialEq, Eq, Debug)]
pub struct ColumnAlternation(pub Vec<ColumnIntersection>);
impl Default for ColumnAlternation {
fn default() -> Self {
ColumnAlternation(vec![])
}
}
impl IntoIterator for ColumnAlternation {
type Item = ColumnIntersection;
type IntoIter = ::std::vec::IntoIter<ColumnIntersection>;
fn into_iter(self) -> Self::IntoIter {
self.0.into_iter()
}
}
impl ColumnAlternation {
pub fn add_alternate(&mut self, intersection: ColumnIntersection) {
self.0.push(intersection);
}
}
impl Debug for ColumnIntersection {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
write!(f, "{:?}", self.0)
}
}
impl Debug for ColumnConstraint {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
use self::ColumnConstraint::*;
match self {
&Equals(ref qa1, ref thing) => {
write!(f, "{:?} = {:?}", qa1, thing)
},
&Inequality { operator, ref left, ref right } => {
write!(f, "{:?} {:?} {:?}", left, operator, right)
},
&Matches(ref qa, ref thing) => {
write!(f, "{:?} MATCHES {:?}", qa, thing)
},
&HasTypes { ref value, ref value_types, check_value } => {
write!(f, "(")?;
for value_type in value_types.iter() {
write!(f, "({:?}.value_type_tag = {:?}", value, value_type)?;
if check_value && value_type == ValueType::Double || value_type == ValueType::Long {
write!(f, " AND typeof({:?}) = '{:?}')", value,
if value_type == ValueType::Double { "real" } else { "integer" })?;
} else {
write!(f, ")")?;
}
write!(f, " OR ")?;
}
write!(f, "1)")
},
&NotExists(ref ct) => {
write!(f, "NOT EXISTS {:?}", ct)
},
}
}
}
#[derive(PartialEq, Clone)]
pub enum EmptyBecause {
CachedAttributeHasNoValues { entity: Entid, attr: Entid },
CachedAttributeHasNoEntity { value: TypedValue, attr: Entid },
ConflictingBindings { var: Variable, existing: TypedValue, desired: TypedValue },
TypeMismatch { var: Variable, existing: ValueTypeSet, desired: ValueTypeSet },
KnownTypeMismatch { left: ValueTypeSet, right: ValueTypeSet },
NoValidTypes(Variable),
NonAttributeArgument,
NonInstantArgument,
NonNumericArgument,
NonEntityArgument,
NonStringFulltextValue,
NonFulltextAttribute(Entid),
UnresolvedIdent(Keyword),
InvalidAttributeIdent(Keyword),
InvalidAttributeEntid(Entid),
InvalidBinding(Column, TypedValue),
ValueTypeMismatch(ValueType, TypedValue),
AttributeLookupFailed,
}
impl Debug for EmptyBecause {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
use self::EmptyBecause::*;
match self {
&CachedAttributeHasNoEntity { ref value, ref attr } => {
write!(f, "(?e, {}, {:?}, _) not present in store", attr, value)
},
&CachedAttributeHasNoValues { ref entity, ref attr } => {
write!(f, "({}, {}, ?v, _) not present in store", entity, attr)
},
&ConflictingBindings { ref var, ref existing, ref desired } => {
write!(f, "Var {:?} can't be {:?} because it's already bound to {:?}",
var, desired, existing)
},
&TypeMismatch { ref var, ref existing, ref desired } => {
write!(f, "Type mismatch: {:?} can't be {:?}, because it's already {:?}",
var, desired, existing)
},
&KnownTypeMismatch { ref left, ref right } => {
write!(f, "Type mismatch: {:?} can't be compared to {:?}",
left, right)
},
&NoValidTypes(ref var) => {
write!(f, "Type mismatch: {:?} has no valid types", var)
},
&NonAttributeArgument => {
write!(f, "Non-attribute argument in attribute place")
},
&NonInstantArgument => {
write!(f, "Non-instant argument in instant place")
},
&NonEntityArgument => {
write!(f, "Non-entity argument in entity place")
},
&NonNumericArgument => {
write!(f, "Non-numeric argument in numeric place")
},
&NonStringFulltextValue => {
write!(f, "Non-string argument for fulltext attribute")
},
&UnresolvedIdent(ref kw) => {
write!(f, "Couldn't resolve keyword {}", kw)
},
&InvalidAttributeIdent(ref kw) => {
write!(f, "{} does not name an attribute", kw)
},
&InvalidAttributeEntid(entid) => {
write!(f, "{} is not an attribute", entid)
},
&NonFulltextAttribute(entid) => {
write!(f, "{} is not a fulltext attribute", entid)
},
&InvalidBinding(ref column, ref tv) => {
write!(f, "{:?} cannot name column {:?}", tv, column)
},
&ValueTypeMismatch(value_type, ref typed_value) => {
write!(f, "Type mismatch: {:?} doesn't match attribute type {:?}",
typed_value, value_type)
},
&AttributeLookupFailed => {
write!(f, "Attribute lookup failed")
},
}
}
}
#[allow(dead_code)]
#[derive(Debug, Eq, PartialEq)]
pub struct FindQuery {
pub find_spec: FindSpec,
pub default_source: SrcVar,
pub with: BTreeSet<Variable>,
pub in_vars: BTreeSet<Variable>,
pub in_sources: BTreeSet<SrcVar>,
pub limit: Limit,
pub where_clauses: Vec<WhereClause>,
pub order: Option<Vec<Order>>,
}
#[derive(Debug, Eq, PartialEq)]
pub enum EvolvedNonValuePlace {
Placeholder,
Variable(Variable),
Entid(Entid),
}
#[derive(Debug, Eq, PartialEq)]
pub enum EvolvedValuePlace {
Placeholder,
Variable(Variable),
Entid(Entid),
Value(TypedValue),
EntidOrInteger(i64),
IdentOrKeyword(ValueRc<Keyword>),
}
pub enum PlaceOrEmpty<T> {
Place(T),
Empty(EmptyBecause),
}
impl<T> PlaceOrEmpty<T> {
pub fn and_then<U, F: FnOnce(T) -> PlaceOrEmpty<U>>(self, f: F) -> PlaceOrEmpty<U> {
match self {
PlaceOrEmpty::Place(x) => f(x),
PlaceOrEmpty::Empty(e) => PlaceOrEmpty::Empty(e),
}
}
}
pub struct EvolvedPattern {
pub source: SrcVar,
pub entity: EvolvedNonValuePlace,
pub attribute: EvolvedNonValuePlace,
pub value: EvolvedValuePlace,
pub tx: EvolvedNonValuePlace,
}