pgsql: Use booleans instead of varchar to return creation status

database/pgsql/feature.go

@@ -129,11 +129,11 @@ func (pgSQL *pgSQL) insertFeatureVersion(featureVersion database.FeatureVersion)
 	}
 
 	// Find or create FeatureVersion.
-	var newOrExisting string
+	var created bool
 
 	t = time.Now()
 	err = tx.QueryRow(soiFeatureVersion, featureID, &featureVersion.Version).
-		Scan(&newOrExisting, &featureVersion.ID)
+		Scan(&created, &featureVersion.ID)
 	observeQueryTime("insertFeatureVersion", "soiFeatureVersion", t)
 
 	if err != nil {
@@ -141,8 +141,9 @@ func (pgSQL *pgSQL) insertFeatureVersion(featureVersion database.FeatureVersion)
 		return 0, handleError("soiFeatureVersion", err)
 	}
 
-	if newOrExisting == "exi" {
-		// That featureVersion already exists, return its id.
+	if !created {
+		// The featureVersion already existed, no need to link it to
+		// vulnerabilities.
 		tx.Commit()
 
 		if pgSQL.cache != nil {

database/pgsql/queries.go

@@ -63,9 +63,9 @@ const (
 			WHERE NOT EXISTS (SELECT id FROM FeatureVersion WHERE feature_id = $1 AND version = $2)
 			RETURNING id
 		)
-		SELECT 'exi', id FROM FeatureVersion WHERE feature_id = $1 AND version = $2
+		SELECT false, id FROM FeatureVersion WHERE feature_id = $1 AND version = $2
 		UNION
-		SELECT 'new', id FROM new_featureversion`
+		SELECT true, id FROM new_featureversion`
 
 	searchVulnerabilityFixedInFeature = `
 		SELECT id, vulnerability_id, version FROM Vulnerability_FixedIn_Feature
@@ -167,9 +167,9 @@ const (
 			WHERE NOT EXISTS (SELECT id FROM Vulnerability_FixedIn_Feature WHERE vulnerability_id = $1 AND feature_id = $2)
 			RETURNING id
 		)
-		SELECT 'exi', id FROM Vulnerability_FixedIn_Feature WHERE vulnerability_id = $1 AND feature_id = $2
+		SELECT false, id FROM Vulnerability_FixedIn_Feature WHERE vulnerability_id = $1 AND feature_id = $2
 		UNION
-		SELECT 'new', id FROM new_fixedinfeature`
+		SELECT true, id FROM new_fixedinfeature`
 
 	searchFeatureVersionByFeature = `SELECT id, version FROM FeatureVersion WHERE feature_id = $1`
 

database/pgsql/vulnerability.go

@@ -433,22 +433,22 @@ func (pgSQL *pgSQL) insertVulnerabilityFixedInFeatureVersions(tx *sql.Tx, vulner
 
 	for _, fv := range fixedIn {
 		var fixedInID int
-		var newOrExisting string
+		var created bool
 
 		// Find or create entry in Vulnerability_FixedIn_Feature.
 		err = tx.QueryRow(
 			soiVulnerabilityFixedInFeature,
 			vulnerabilityID, fv.Feature.ID,
 			&fv.Version,
-		).Scan(&newOrExisting, &fixedInID)
+		).Scan(&created, &fixedInID)
 
 		if err != nil {
 			return handleError("insertVulnerabilityFixedInFeature", err)
 		}
 
-		if newOrExisting == "exi" {
+		if !created {
 			// The relationship between the feature and the vulnerability already
-			// exists, there's no need to update Vulnerability_Affects_FeatureVersion.
+			// existed, no need to update Vulnerability_Affects_FeatureVersion.
 			continue
 		}