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SourceCapabilities

laminar_core::lookup::predicate

Struct SourceCapabilities 

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pub struct SourceCapabilities {
    pub eq_columns: Vec<String>,
    pub range_columns: Vec<String>,
    pub in_columns: Vec<String>,
    pub supports_null_check: bool,
}
Expand description

Capabilities that a lookup source declares for predicate pushdown.

Used by split_predicates to decide which predicates can be pushed to the source vs. evaluated locally.

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§eq_columns: Vec<String>

Columns that support equality pushdown.

§range_columns: Vec<String>

Columns that support range pushdown (Lt, LtEq, Gt, GtEq).

§in_columns: Vec<String>

Columns that support IN-list pushdown.

§supports_null_check: bool

Whether the source supports IS NULL / IS NOT NULL pushdown.

Trait Implementations§

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impl Clone for SourceCapabilities

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fn clone(&self) -> SourceCapabilities

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for SourceCapabilities

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for SourceCapabilities

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fn default() -> SourceCapabilities

Returns the “default value” for a type. Read more

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type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.
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fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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