Enum StatisticChange 

pub enum StatisticChange {
    Create(Statistic),
    Drop {
        qname: QualifiedName,
    },
    Replace {
        from: Statistic,
        to: Statistic,
    },
    AlterSetTarget {
        qname: QualifiedName,
        value: i32,
    },
    CommentOn {
        qname: QualifiedName,
        comment: Option<String>,
    },
}

A structural change to a single statistic.

Variants

Create(Statistic)

CREATE STATISTICS ...

Drop

DROP STATISTICS ... — destructive.

Fields

qname: QualifiedName

Schema-qualified statistic name.

Replace

DROP STATISTICS old; CREATE STATISTICS new; — destructive; used when columns / kinds / target table differ (PG has no in-place ALTER for those fields).

Fields

from: Statistic

The statistic as it exists in the target.

to: Statistic

The statistic as it should exist in the source.

AlterSetTarget

ALTER STATISTICS s SET STATISTICS n — analyze target.

Fields

qname: QualifiedName

Schema-qualified statistic name.

value: i32

New statistics target value.

CommentOn

COMMENT ON STATISTICS s IS '...'

Fields

qname: QualifiedName

Schema-qualified statistic name.

comment: Option<String>

New comment value (None clears the comment).

Trait Implementations

impl Clone for StatisticChange

fn clone(&self) -> StatisticChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StatisticChange

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StatisticChange

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for StatisticChange

impl PartialEq for StatisticChange

fn eq(&self, other: &StatisticChange) -> 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 Serialize for StatisticChange

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for StatisticChange