Support metric_names for tslib/storage

tslib/storage/src/journal.ts

@@ -29,6 +29,13 @@ interface JournalOpDeleteStudy extends JournalOpBase {
   study_id: number
 }
 
+interface JournalOpSetStudySystemAttr extends JournalOpBase {
+  study_id: number
+  system_attr: { 
+    "study:metric_names": string[]
+   }
+}
+
 interface JournalOpCreateTrial extends JournalOpBase {
   study_id: number
   datetime_start?: string
@@ -179,6 +186,14 @@ class JournalStorage {
     this.studies = this.studies.filter((item) => item.id !== log.study_id)
   }
 
+  public applyStudySystemAttr(log: JournalOpSetStudySystemAttr): void {
+    const thisStudy = this.studies.find((item) => item.id === log.study_id)
+    if (thisStudy === undefined) {
+      return
+    }
+    thisStudy.metric_names = log.system_attr["study:metric_names"]
+  }
+
   public applyCreateTrial(log: JournalOpCreateTrial): void {
     const thisStudy = this.studies.find((item) => item.id === log.study_id)
     if (thisStudy === undefined) {
@@ -393,7 +408,9 @@ const loadJournalStorage = (
         // Unsupported
         break
       case JournalOperation.SET_STUDY_SYSTEM_ATTR:
-        // Unsupported
+        journalStorage.applyStudySystemAttr(
+          parsedLog as JournalOpSetStudySystemAttr
+        )
         break
       case JournalOperation.CREATE_TRIAL:
         journalStorage.applyCreateTrial(parsedLog as JournalOpCreateTrial)

tslib/storage/src/sqlite.ts

@@ -144,6 +144,11 @@ const getStudy = (
     trials: [],
   }
 
+  const studySystemAttrs = getStudySystemAttributes(db, summary.id)
+  if (studySystemAttrs !== undefined) {
+    study.metric_names = studySystemAttrs.metric_names
+  }
+
   let intersection_search_space: Set<Optuna.SearchSpaceItem> = new Set()
   study.trials = getTrials(db, summary.id, schemaVersion)
   for (const trial of study.trials) {
@@ -367,6 +372,23 @@ const parseDistributionJSON = (t: string): Optuna.Distribution => {
   }
 }
 
+const getStudySystemAttributes = (
+  db: SQLite3DB,
+  studyId: number
+) => {
+  let attrs: { metric_names: string[] } | undefined
+  db.exec({
+    sql: `SELECT key, value_json FROM study_system_attributes WHERE study_id = ${studyId} AND key = 'dashboard:objective_names'`,
+    // biome-ignore lint/suspicious/noExplicitAny: <explanation>
+    callback: (vals: any[]) => {
+      attrs = {
+        metric_names: JSON.parse(vals[1]),
+      }
+    },
+  })
+  return attrs
+}
+
 const getTrialUserAttributes = (
   db: SQLite3DB,
   trialId: number