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Merge pull request #5366 from trofi/speedup-ca-query

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ca-specific-schema.sql: add index on RealisationsRefs(referrer)
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Théophane Hufschmitt 2021-12-14 09:08:17 +01:00 committed by GitHub
parent bcd4d2e4c6 edfc5b2f12
commit 3fc8042f77
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2 changed files with 17 additions and 1 deletions
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5
src/libstore/ca-specific-schema.sql
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@ -19,3 +19,8 @@ create table if not exists RealisationsRefs (
foreign key (referrer) references Realisations(id) on delete cascade,
foreign key (realisationReference) references Realisations(id) on delete restrict
);
-- used by QueryRealisationReferences
create index if not exists IndexRealisationsRefs on RealisationsRefs(referrer);
-- used by cascade deletion when ValidPaths is deleted
create index if not exists IndexRealisationsRefsOnOutputPath on Realisations(outputPath);

13
src/libstore/local-store.cc
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@ -80,7 +80,7 @@ int getSchema(Path schemaPath)
void migrateCASchema(SQLite& db, Path schemaPath, AutoCloseFD& lockFd)
{
const int nixCASchemaVersion = 2;
const int nixCASchemaVersion = 3;
int curCASchema = getSchema(schemaPath);
if (curCASchema != nixCASchemaVersion) {
if (curCASchema > nixCASchemaVersion) {
@ -131,6 +131,17 @@ void migrateCASchema(SQLite& db, Path schemaPath, AutoCloseFD& lockFd)
txn.commit();
}
if (curCASchema < 3) {
SQLiteTxn txn(db);
// Apply new indices added in this schema update.
db.exec(R"(
-- used by QueryRealisationReferences
create index if not exists IndexRealisationsRefs on RealisationsRefs(referrer);
-- used by cascade deletion when ValidPaths is deleted
create index if not exists IndexRealisationsRefsOnOutputPath on Realisations(outputPath);
)");
txn.commit();
}
writeFile(schemaPath, fmt("%d", nixCASchemaVersion));
lockFile(lockFd.get(), ltRead, true);
}