Struct TxReport 

#[non_exhaustive]
pub struct TxReport {
    pub tx_id: i64,
    pub tx_instant: DateTime<Utc>,
    pub tempids: BTreeMap<String, i64>,
    pub datoms_asserted: Option<usize>,
    pub datoms_retracted: Option<usize>,
}

A transaction report summarizes an applied transaction.

Non-exhaustive (1.18.0): fields may be added in a minor release. Read the fields; build one with TxReport::new.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

tx_id: i64

The transaction ID of the transaction.

tx_instant: DateTime<Utc>

The timestamp when the transaction began to be committed.

tempids: BTreeMap<String, i64>

A map from string literal tempid to resolved or allocated entid.

Every string literal tempid presented to the transactor either resolves via upsert to an existing entid, or is allocated a new entid. (It is possible for multiple distinct string literal tempids to all unify to a single freshly allocated entid.)

datoms_asserted: Option<usize>

How many datoms the transaction added to the log, and how many it retracted (#281). Both leave out the transaction’s own :db/txInstant datom, so 0, 0 means the transaction changed nothing. A redundant assertion (the datom is already there) or a retraction of an absent datom is not counted; replacing a cardinality-one value counts one assertion and one retraction. Both are None (not counted) from a store whose MentatStoring doesn’t implement transaction_datom_counts.

datoms_retracted: Option<usize>

Implementations

impl TxReport

pub fn new( tx_id: i64, tx_instant: DateTime<Utc>, tempids: BTreeMap<String, i64>, datoms_asserted: Option<usize>, datoms_retracted: Option<usize>, ) -> TxReport

pub fn is_empty(&self) -> bool

True if the transaction asserted and retracted nothing (beyond its :db/txInstant). False when the store did not count.

Trait Implementations

impl Clone for TxReport

fn clone(&self) -> TxReport

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TxReport

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

Formats the value using the given formatter.

impl Eq for TxReport

impl Hash for TxReport

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

where __H: Hasher,

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 Ord for TxReport

fn cmp(&self, other: &TxReport) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

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

Restrict a value to a certain range.

impl PartialEq for TxReport

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for TxReport

fn partial_cmp(&self, other: &TxReport) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for TxReport