heliosdb_proxy::schema_routing::analyzer

Struct QueryAnalysis

pub struct QueryAnalysis {
    pub original_query: String,
    pub tables: Vec<TableRef>,
    pub access_patterns: Vec<AccessPattern>,
    pub shard_keys: HashMap<String, ShardKeyValue>,
    pub workload_type: WorkloadType,
    pub complexity: u32,
    pub selectivity: f64,
    pub is_read_only: bool,
    pub has_aggregations: bool,
    pub has_joins: bool,
    pub has_subqueries: bool,
}

Expand description

Query analysis result

Fields§

§original_query: String

Original query

§tables: Vec<TableRef>

Tables referenced

§access_patterns: Vec<AccessPattern>

Access patterns per table

§shard_keys: HashMap<String, ShardKeyValue>

Extracted shard keys

§workload_type: WorkloadType

Classified workload type

§complexity: u32

Estimated complexity (0-100)

§selectivity: f64

Estimated selectivity (0.0 - 1.0)

§is_read_only: bool

Is read-only query

§has_aggregations: bool

Has aggregation functions

§has_joins: bool

Has JOIN clauses

§has_subqueries: bool

Has subqueries

Implementations§

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impl QueryAnalysis

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pub fn is_vector_query(&self) -> bool

Check if query involves vector operations

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pub fn is_analytics(&self) -> bool

Check if query is analytics (OLAP)

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pub fn primary_table(&self) -> Option<&TableRef>

Get primary table (first table in query)

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pub fn has_shard_key(&self) -> bool

Check if query targets a specific shard

Trait Implementations§

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impl Clone for QueryAnalysis

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fn clone(&self) -> QueryAnalysis

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 QueryAnalysis

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl UnwindSafe for QueryAnalysis

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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impl<T, U> Into for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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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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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

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

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