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chore: select SBOMs to delete from the median #90

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chore: select SBOMs to delete from the median #90

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29 changes: 17 additions & 12 deletions src/scenario/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -343,23 +343,28 @@ LIMIT 10;
}

/// Get a pool of deletable SBOMs (up to 100)
/// These SBOMs are selected based on having the most packages
/// These SBOMs are selected from around the median package count
pub async fn deletable_sboms(&self) -> anyhow::Result<Vec<String>> {
let mut db = crate::db::connect(&self.db).await?;

let rows = sqlx::query(
r#"
SELECT
a.sbom_id::text as id,
count(b.*) as package_count
FROM
sbom a
JOIN sbom_package b ON a.sbom_id = b.sbom_id
GROUP BY
a.sbom_id
ORDER BY
package_count DESC,
a.sbom_id
WITH counts AS (
SELECT
sbom_id,
COUNT(*)::bigint AS package_count
FROM sbom_package
GROUP BY sbom_id
),
med AS (
SELECT
percentile_disc(0.5) WITHIN GROUP (ORDER BY package_count) AS median_count
FROM counts
)
SELECT c.sbom_id::text AS id
FROM counts c
CROSS JOIN med
ORDER BY ABS(c.package_count - med.median_count), c.package_count, c.sbom_id
LIMIT 100
"#,
)
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