pub struct PredicateClassifier { /* private fields */ }Expand description
Classifies predicates based on column membership.
Uses both unqualified column names and qualified "alias.col" names
for resolution (audit C7). When a column has a relation qualifier,
the qualified form is checked first.
Implementations§
Source§impl PredicateClassifier
impl PredicateClassifier
Sourcepub fn new(
lookup_columns: HashSet<String>,
stream_columns: HashSet<String>,
lookup_alias: Option<&str>,
stream_alias: Option<&str>,
) -> Self
pub fn new( lookup_columns: HashSet<String>, stream_columns: HashSet<String>, lookup_alias: Option<&str>, stream_alias: Option<&str>, ) -> Self
Creates a new classifier from column sets.
lookup_alias / stream_alias are the SQL aliases (e.g., c for
customers c). When provided, qualified lookups like c.name can
be resolved unambiguously.
Sourcepub fn classify(&self, expr: &Expr) -> PredicateClass
pub fn classify(&self, expr: &Expr) -> PredicateClass
Classify a predicate expression.
Trait Implementations§
Auto Trait Implementations§
impl Freeze for PredicateClassifier
impl RefUnwindSafe for PredicateClassifier
impl Send for PredicateClassifier
impl Sync for PredicateClassifier
impl Unpin for PredicateClassifier
impl UnsafeUnpin for PredicateClassifier
impl UnwindSafe for PredicateClassifier
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type ArchivedMetadata = ()
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_: &<T as ArchivePointee>::ArchivedMetadata,
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Converts some archived metadata to the pointer metadata for itself.
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Converts
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Source§impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
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