Enum AllowedMySqlQuery 

pub enum AllowedMySqlQuery {
    DigestSnapshot,
    ThreadsSnapshot,
    MetadataLocksSnapshot,
    BufferPoolSnapshot,
}

Closed enumeration of every SQL statement the live-mysql adapter will ever execute. Adding a variant is a reviewable change that simultaneously breaks Self::sql_concat_for_lock and therefore the allow-list lock test.

Variants

DigestSnapshot

Per-digest cumulative latency / call / row counters. Source: performance_schema.events_statements_summary_by_digest (MySQL 5.6+; column names stable through 8.4). Residual classes emitted: PlanRegression, WorkloadPhase.

ThreadsSnapshot

Per-thread wait-event sample. Source: performance_schema.threads (MySQL 5.6+). Residual class emitted: Contention.

MetadataLocksSnapshot

Per-object metadata-lock wait snapshot. Source: performance_schema.metadata_locks (MySQL 5.7+). Residual class emitted: Contention (no PostgreSQL analog).

BufferPoolSnapshot

Per-pool InnoDB buffer-pool cumulative counters. Source: information_schema.innodb_buffer_pool_stats (MySQL 5.6+). Residual class emitted: CacheIo.

Implementations

impl AllowedMySqlQuery

pub const ALL: [AllowedMySqlQuery; 4]

Every variant the adapter knows about. Used by the lock test and by the scraper to enumerate a full poll cycle in a deterministic order.

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

Pinned SQL text for this variant. Every string is a SELECT against performance_schema or information_schema. Any edit invalidates the lock test and forces a paired paper update.

pub fn sql_concat_for_lock() -> String

Concatenation of every variant’s SQL text, in ALL-order, separated by a single newline. The SHA-256 of this string is pinned by tests/live_query_allowlist_lock_mysql.rs.

Trait Implementations

impl Clone for AllowedMySqlQuery

fn clone(&self) -> AllowedMySqlQuery

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AllowedMySqlQuery

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

Formats the value using the given formatter.

impl Hash for AllowedMySqlQuery

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for AllowedMySqlQuery

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for AllowedMySqlQuery

impl Eq for AllowedMySqlQuery

impl StructuralPartialEq for AllowedMySqlQuery