Enum ScanType 

pub enum ScanType {
    FullTable,
    IndexRange,
    IndexLookup,
    UniqueLookup,
    Other,
}

Scan type classification (unified abstraction of scan methods across dialects)

Variants

FullTable

Full table scan (MySQL ALL / PG Seq Scan / SQLite SCAN / Oracle TABLE ACCESS FULL / MSSQL Table Scan)

IndexRange

Index range scan (MySQL range / PG Index Scan / SQLite SEARCH ... USING INDEX / Oracle INDEX RANGE SCAN / MSSQL Index Scan)

IndexLookup

Index equality/point lookup (MySQL ref/eq_ref / Oracle INDEX UNIQUE SCAN)

UniqueLookup

Primary key/unique index point lookup (MySQL const / PG Index Scan ... pkey / MSSQL Index Seek)

Other

Other (materialization, sorting, aggregation, etc.)

Implementations

impl ScanType

pub fn is_full_table_scan(&self) -> bool

Whether it is a full table scan (performance warning trigger condition)

pub fn as_str(&self) -> &'static str

pub fn all() -> &'static [ScanType]

pub fn is_index_scan(&self) -> bool

pub fn is_index_lookup(&self) -> bool

pub fn parse_name(s: &str) -> Option<ScanType>

Trait Implementations

impl Clone for ScanType

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ScanType

impl Debug for ScanType

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

Formats the value using the given formatter.

impl Eq for ScanType

impl PartialEq for ScanType

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ScanType