Enum ScanType 

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

扫描类型分类（各方言扫描方式的统一抽象）

Variants

FullTable

全表扫描（MySQL ALL / PG Seq Scan / SQLite SCAN / Oracle TABLE ACCESS FULL / MSSQL Table Scan）

IndexRange

索引范围扫描（MySQL range / PG Index Scan / SQLite SEARCH ... USING INDEX / Oracle INDEX RANGE SCAN / MSSQL Index Scan）

IndexLookup

索引等值/点查（MySQL ref/eq_ref / Oracle INDEX UNIQUE SCAN）

UniqueLookup

主键/唯一索引点查（MySQL const / PG Index Scan ... pkey / MSSQL Index Seek）

Other

其他（物化、排序、聚合等）

Implementations

impl ScanType

pub fn is_full_table_scan(&self) -> bool

是否为全表扫描（性能警告触发条件）

Trait Implementations

impl Clone for ScanType

fn clone(&self) -> ScanType

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: &ScanType) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ScanType