Struct RiskEngine 

pub struct RiskEngine {
    pub row_counts: HashMap<String, u64>,
    pub live_schema: Option<LiveSchema>,
    pub pg_version: u32,
}

Fields

row_counts: HashMap<String, u64>

Estimated rows per table – supplied by the user via –table-rows flag OR imported from the live database via –db-url.

live_schema: Option<LiveSchema>

Optional live schema snapshot fetched via –db-url.

pg_version: u32

Target PostgreSQL major version (e.g. 14 for PG14). Rules adapt their scoring based on this value — e.g. ADD COLUMN with a DEFAULT is metadata-only on PG11+ but triggers a full table rewrite on PG10 and below. Defaults to 14 (current PostgreSQL LTS).

Implementations

impl RiskEngine

pub fn new(row_counts: HashMap<String, u64>) -> Self

pub fn with_pg_version(self, version: u32) -> Self

Set the target PostgreSQL major version for version-aware scoring.

Example: .with_pg_version(11) activates PG11+ metadata-only rules.

pub fn with_live_schema( row_counts: HashMap<String, u64>, live: LiveSchema, ) -> Self

Create an engine seeded from a live database snapshot. Row counts from live override any manually provided row_counts.

pub fn analyze( &self, file: &str, statements: &[ParsedStatement], ) -> MigrationReport

Run every rule against the parsed statements and build a graph, then return the final report for the file.