Struct MigrationExplain 

pub struct MigrationExplain {
    pub script: String,
    pub version: Option<String>,
    pub statements: Vec<StatementExplain>,
    pub error: Option<String>,
}

EXPLAIN analysis for a single migration.

Fields

script: String

Filename of the migration script.

version: Option<String>

Version string, or None for repeatable migrations.

statements: Vec<StatementExplain>

EXPLAIN results for each statement in the migration.

error: Option<String>

The statement failure that stopped the preview, if any.

A DDL statement that fails inside the preview transaction used to be swallowed at debug level, and PostgreSQL then aborts the transaction so every later statement fails too — which was also swallowed. The dry run therefore listed every statement as if it were fine. Recording the first real failure, and stopping there, is the whole point of a preview.

Trait Implementations

impl Debug for MigrationExplain

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

Formats the value using the given formatter.

impl Serialize for MigrationExplain

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

where __S: Serializer,

Serialize this value into the given Serde serializer.