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Address review comments rnewman.

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* Remove `WhereNotClause` and populate `NotJoin` with `WhereClause`.
* Fix validation for `not` and `not-join`, removing tests that were invalid.
* Address rustification comments.
This commit is contained in:
Emily Toop 2017-04-06 18:15:40 +01:00
parent fb2dde1d2f
commit 7eea65b3e2
4 changed files with 48 additions and 157 deletions
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2
query-algebrizer/src/clauses/mod.rs
View file

@ -62,8 +62,8 @@ mod predicate;
mod resolve;
use validate::{
validate_or_join,
validate_not_join,
validate_or_join,
};
// We do this a lot for errors.

156
query-algebrizer/src/validate.rs
View file

@ -79,36 +79,13 @@ pub fn validate_not_join(not_join: &NotJoin) -> Result<()> {
// Grab our mentioned variables and ensure that the rules are followed.
match not_join.unify_vars {
UnifyVars::Implicit => {
if not_join.clauses.len() < 2 {
Ok(())
} else {
let mut clauses = not_join.clauses.iter();
let template = clauses.next().unwrap().collect_mentioned_variables();
for clause in clauses {
if template != clause.collect_mentioned_variables() {
bail!(ErrorKind::NonMatchingVariablesInNotClause);
}
}
Ok(())
}
Ok(())
},
UnifyVars::Explicit(ref vars) => {
// The joined vars must each appear somewhere in the clauses mentioned variables.
let var_set: BTreeSet<Variable> = vars.iter().cloned().collect();
for var in &var_set {
if !&not_join.clauses.iter().any(|clause| clause.collect_mentioned_variables().contains(&var)) {
bail!(ErrorKind::NonMatchingVariablesInNotClause);
}
}
// any other mentioned variables must also unify
let mut clauses = not_join.clauses.iter();
let template: BTreeSet<Variable> = clauses.next().unwrap().collect_mentioned_variables().difference(&var_set).cloned().collect();
for clause in clauses {
let mentioned_vars = clause.collect_mentioned_variables().difference(&var_set).cloned().collect();
if template != mentioned_vars {
bail!(ErrorKind::NonMatchingVariablesInOrClause);
}
if !var_set.is_subset(&not_join.collect_mentioned_variables()) {
bail!(ErrorKind::NonMatchingVariablesInNotClause);
}
Ok(())
},
@ -125,7 +102,6 @@ mod tests {
FindQuery,
NamespacedKeyword,
OrWhereClause,
WhereNotClause,
Pattern,
PatternNonValuePlace,
PatternValuePlace,
@ -139,8 +115,8 @@ mod tests {
use clauses::ident;
use super::{
validate_or_join,
validate_not_join,
validate_or_join,
};
fn value_ident(ns: &str, name: &str) -> PatternValuePlace {
@ -277,15 +253,15 @@ mod tests {
/// Tests that the top-level form is a valid `not`, returning the clauses.
fn valid_not_join(parsed: FindQuery, expected_unify: UnifyVars) -> Vec<WhereNotClause> {
// filter all the not clauses
let mut nots = parsed.where_clauses.iter().filter(|&x| match *x {
WhereClause::NotJoin(_) => true,
fn valid_not_join(parsed: FindQuery, expected_unify: UnifyVars) -> Vec<WhereClause> {
// Filter out all the clauses that are not `not`s.
let mut nots = parsed.where_clauses.into_iter().filter(|x| match x {
&WhereClause::NotJoin(_) => true,
_ => false,
});
// there should be only one not clause
let clause = nots.next().unwrap().clone();
// There should be only one not clause.
let clause = nots.next().unwrap();
assert_eq!(None, nots.next());
match clause {
@ -299,7 +275,7 @@ mod tests {
}
}
/// Test that a `not` is valid if all of its arms refer to the same variables.
/// Test that a `not` is valid if it is implicit.
#[test]
fn test_success_not() {
let query = r#"[:find ?name
@ -315,54 +291,27 @@ mod tests {
(Some(clause1), Some(clause2), None) => {
assert_eq!(
clause1,
WhereNotClause::Clause(
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable::from_valid_name("?id")),
attribute: ident("artist", "country"),
value: value_ident("country", "CA"),
tx: PatternNonValuePlace::Placeholder,
}),
));
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable::from_valid_name("?id")),
attribute: ident("artist", "country"),
value: value_ident("country", "CA"),
tx: PatternNonValuePlace::Placeholder,
}));
assert_eq!(
clause2,
WhereNotClause::Clause(
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable::from_valid_name("?id")),
attribute: ident("artist", "country"),
value: value_ident("country", "GB"),
tx: PatternNonValuePlace::Placeholder,
}),
));
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable::from_valid_name("?id")),
attribute: ident("artist", "country"),
value: value_ident("country", "GB"),
tx: PatternNonValuePlace::Placeholder,
}));
},
_ => panic!(),
};
}
/// Test that a `not` with differing variable sets in each body part will fail to validate.
#[test]
fn test_invalid_implicit_not() {
let query = r#"[:find ?name
:where [?id :artist/name ?name]
(not [?id :artist/country :country/CA]
[?release :release/year 1970])]"#;
let parsed = parse_find_string(query).expect("expected successful parse");
let mut nots = parsed.where_clauses.iter().filter(|&x| match *x {
WhereClause::NotJoin(_) => true,
_ => false,
});
let clause = nots.next().unwrap().clone();
assert_eq!(None, nots.next());
match clause {
WhereClause::NotJoin(not_join) => assert!(validate_not_join(&not_join).is_err()),
_ => panic!(),
}
}
#[test]
fn test_success_not_join() {
let query = r#"[:find ?artist
@ -373,30 +322,28 @@ mod tests {
let parsed = parse_find_string(query).expect("expected successful parse");
let clauses = valid_not_join(parsed, UnifyVars::Explicit(vec![Variable::from_valid_name("?artist")]));
// // Let's do some detailed parse checks.
// Let's do some detailed parse checks.
let mut parts = clauses.into_iter();
match (parts.next(), parts.next(), parts.next()) {
(Some(clause1), Some(clause2), None) => {
assert_eq!(
clause1,
WhereNotClause::Clause(
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable::from_valid_name("?release")),
attribute: ident("release", "artists"),
value: PatternValuePlace::Variable(Variable::from_valid_name("?artist")),
tx: PatternNonValuePlace::Placeholder,
})));
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable::from_valid_name("?release")),
attribute: ident("release", "artists"),
value: PatternValuePlace::Variable(Variable::from_valid_name("?artist")),
tx: PatternNonValuePlace::Placeholder,
}));
assert_eq!(
clause2,
WhereNotClause::Clause(
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable::from_valid_name("?release")),
attribute: ident("release", "year"),
value: PatternValuePlace::EntidOrInteger(1970),
tx: PatternNonValuePlace::Placeholder,
})));
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable::from_valid_name("?release")),
attribute: ident("release", "year"),
value: PatternValuePlace::EntidOrInteger(1970),
tx: PatternNonValuePlace::Placeholder,
}));
},
_ => panic!(),
};
@ -424,27 +371,4 @@ mod tests {
_ => panic!(),
}
}
/// Test that a `not-join` that does not match any vars declared inside it fails to validate.
#[test]
fn test_invalid_explicit_not_join_non_matching_internal_vars() {
let query = r#"[:find ?artist
:where [?artist :artist/name]
(not-join [?artist]
[?release :release/artists ?artist]
[?year :release/year 1970])]"#;
let parsed = parse_find_string(query).expect("expected successful parse");
let mut nots = parsed.where_clauses.iter().filter(|&x| match *x {
WhereClause::NotJoin(_) => true,
_ => false,
});
let clause = nots.next().unwrap().clone();
assert_eq!(None, nots.next());
match clause {
WhereClause::NotJoin(not_join) => assert!(validate_not_join(&not_join).is_err()),
_ => panic!(),
}
}
}

22
query-parser/src/parse.rs
View file

@ -43,7 +43,6 @@ use self::mentat_query::{
OrJoin,
OrWhereClause,
NotJoin,
WhereNotClause,
Pattern,
PatternNonValuePlace,
PatternValuePlace,
@ -188,19 +187,11 @@ def_parser!(Where, or_join_clause, WhereClause, {
}))
});
def_value_parser_fn!(Where, not_pattern_clause, WhereNotClause, input, {
Where::clause().map(|clause| WhereNotClause::Clause(clause)).parse_stream(input)
});
def_value_parser_fn!(Where, where_not_clause, WhereNotClause, input, {
choice([Where::not_pattern_clause()]).parse_stream(input)
});
def_value_parser_fn!(Where, not_clause, WhereClause, input, {
satisfy_map(|x: edn::Value| {
seq(x).and_then(|items| {
let mut p = Where::not()
.with(many1(Where::where_not_clause()))
.with(many1(Where::clause()))
.skip(eof())
.map(|clauses| {
WhereClause::NotJoin(
@ -220,7 +211,7 @@ def_value_parser_fn!(Where, not_join_clause, WhereClause, input, {
seq(x).and_then(|items| {
let mut p = Where::not_join()
.with(Where::rule_vars())
.and(many1(Where::where_not_clause()))
.and(many1(Where::clause()))
.skip(eof())
.map(|(vars, clauses)| {
WhereClause::NotJoin(
@ -618,14 +609,14 @@ mod test {
WhereClause::NotJoin(
NotJoin {
unify_vars: UnifyVars::Implicit,
clauses: vec![WhereNotClause::Clause(
clauses: vec![
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(variable(e)),
attribute: PatternNonValuePlace::Variable(variable(a)),
value: PatternValuePlace::Variable(variable(v)),
tx: PatternNonValuePlace::Placeholder,
}))],
})],
}));
}
@ -645,14 +636,13 @@ mod test {
WhereClause::NotJoin(
NotJoin {
unify_vars: UnifyVars::Explicit(vec![variable(e.clone())]),
clauses: vec![WhereNotClause::Clause(
WhereClause::Pattern(Pattern {
clauses: vec![WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(variable(e)),
attribute: PatternNonValuePlace::Variable(variable(a)),
value: PatternValuePlace::Variable(variable(v)),
tx: PatternNonValuePlace::Placeholder,
}))],
})],
}));
}

25
query/src/lib.rs
View file

@ -570,24 +570,10 @@ pub struct OrJoin {
pub clauses: Vec<OrWhereClause>,
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum WhereNotClause {
Clause(WhereClause),
}
impl WhereNotClause {
pub fn is_pattern_or_patterns(&self) -> bool {
match self {
&WhereNotClause::Clause(WhereClause::Pattern(_)) => true,
_ => false,
}
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct NotJoin {
pub unify_vars: UnifyVars,
pub clauses: Vec<WhereNotClause>,
pub clauses: Vec<WhereClause>,
}
#[allow(dead_code)]
@ -680,15 +666,6 @@ impl ContainsVariables for NotJoin {
}
}
impl ContainsVariables for WhereNotClause {
fn accumulate_mentioned_variables(&self, acc: &mut BTreeSet<Variable>) {
use WhereNotClause::*;
match self {
&Clause(ref clause) => clause.accumulate_mentioned_variables(acc),
}
}
}
impl ContainsVariables for Predicate {
fn accumulate_mentioned_variables(&self, acc: &mut BTreeSet<Variable>) {
for arg in &self.args {