GreptimeTeam/greptimedb v1.0.0 on GitHub

Release date: April 08, 2026

GreptimeDB v1.0.0 switches the default SST format to flat for better performance under high-cardinality workloads, improves metric engine ingestion with bulk inserts, adds partial success support for trace ingestion, and includes several PostgreSQL compatibility fixes.

👍 Highlights

Flat SST is now the default storage format. New tables use the flat format by default. Existing tables using primary_key format continue to work, and the flat scan path supports both formats. To explicitly use the old format:

ALTER TABLE my_table SET 'sst_format' = 'primary_key';

Or via HTTP ingestion header:

x-greptime-hints: sst_format=primary_key

OTLP

Partial success in trace ingestion so partial errors no longer fail the entire batch.
Auto alter table during trace ingestion from int to float types.

PostgreSQL Compatibility

Fix extended query optimization and format issues.
Fix ParameterDescription size limit handling.
Fix 8-bit int mapped to smallint.
Fix sync cleanup issues with PostgreSQL format.

Breaking changes

feat!: switch default sst format to flat by @evenyag in #7909
refactor!: update arrow-ipc output to stream format by @sunng87 in #7922

🚀 Features

feat(procedure): detect potential deadlock when parent/child procedures share lock keys by @YZL0v3ZZ in #7752
feat: introduce APIs for storing perses dashboard definition by @sunng87 in #7791
feat: track unlimited usage in memory manager by @fengjiachun in #7811
feat(http): improve error logging with client IP by @maximk777 in #7503
feat(mito2): add partition range cache infrastructure by @evenyag in #7798
feat: add flat last row reader to the final stream by @evenyag in #7818
feat(metric-engine): support bulk inserts with put fallback by @v0y4g3r in #7792
feat: update dashboard to v0.12.0 by @ZonaHex in #7823
feat: cache decoded region metadata alone with parquet metadata by @waynexia in #7813
feat: export import v2 pr1 by @fengjiachun in #7785
feat(mito): flat scan for time series memtable by @v0y4g3r in #7814
feat: avoid some vector-array conversions on flat projection by @waynexia in #7804
feat: supports sst_format for x-greptime-hints and database options by @killme2008 in #7843
feat: add parquet pk prefilter helpers by @evenyag in #7850
feat: implement partition range cache stream by @evenyag in #7842
feat: use ArrowReaderBuilder instead of the RowGroups API by @evenyag in #7853
feat: simplify nested aggr inside count query by @waynexia in #7859
feat: update postgres ParameterDescription size limit by @sunng87 in #7861
feat: add incremental read context and scan boundaries by @discord9 in #7848
feat: add common_version customization by @sunng87 in #7869
feat: pending rows batching for metrics by @v0y4g3r in #7831
feat(partition): add expression split utility by @WenyXu in #7822
feat: implement prefilter framework and primary key prefilter by @evenyag in #7862
feat: implement export-v2 chunked data export flow by @fengjiachun in #7841
feat: auto-align Prometheus schemas in pending rows batching by @v0y4g3r in #7877
feat: implement prefilter for bulk memtable by @evenyag in #7895
feat: partial success in trace ingestion by @shuiyisong in #7892
feat: always use flat scan path for both format by @evenyag in #7901
feat: auto alter table during trace ingestion from int to float by @shuiyisong in #7871

🐛 Bug Fixes

fix: make pipeline table ttl forever by @sunng87 in #7795
fix: rm useless analyzer by @discord9 in #7797
fix: allow empty string for env values by @killme2008 in #7803
fix: correct unicode representation for jsonb_to_string by @sunng87 in #7810
fix: resolve optimization issue for extended query by @sunng87 in #7824
fix: windows file path by @fengjiachun in #7839
fix: prevent stale in-flight cache refill after invalidation in CacheContainer by @WenyXu in #7825
fix: prom cast to f64 by @discord9 in #7840
fix: update 8-bit int to smallint in postgres by @sunng87 in #7854
fix(mito2): accept post-truncate flush for skip-wal tables by @v0y4g3r in #7858
fix: nested views not working by @Boudewijn26 in #7857
fix: fix SeriesScan verbose mode mising metrics by @evenyag in #7872
fix(datatypes): correct ConstantVector rhs comparison in vector equality by @cuiweixie in #7866
fix: correct app-name for dashboard by @sunng87 in #7884
fix: allow auto type upscale conversion in trace ingestion by @shuiyisong in #7870
fix: avoid cloning serialized view plans on resolve by @ynachi in #7882
fix: incorrect prefilter check by @evenyag in #7886
fix: return empty when promql gets non-exist label name by @shuiyisong in #7899
fix: windows ci by @fengjiachun in #7905
fix: add overflow check before interleave() by @evenyag in #7921
fix: resolve postgres format and sync cleanup issues by @sunng87 in #7928
fix(repartition): harden repartition rollback paths by @WenyXu in #7918

🚜 Refactor

refactor: customize standalone instance build by @MichaelScofield in #7807
refactor: unify flush and compaction to always use FlatSource by @evenyag in #7799
refactor: remove Memtable::iter by @v0y4g3r in #7809
refactor: move election trait and implementations to the common-meta crate by @shuiyisong in #7820
refactor: simplify scan memory tracking by @fengjiachun in #7827
refactor(metric-engine): Refactor PendingRowsBatcher for better testability and benchmarking by @v0y4g3r in #7902
refactor: extract otel helper by @shuiyisong in #7910

📚 Documentation

docs: update year to 2026 by @yihong0618 in #7787
docs: flow inc query rfc by @discord9 in #7816
docs(metric-engine): update prom_store example configs by @v0y4g3r in #7920

⚡ Performance

perf: support group accumulators for state wrapper by @waynexia in #7826
perf: optimize promql range functions by @waynexia in #7878
perf: no longer window sort when limit by @discord9 in #7912

🧪 Testing

test(fuzz): add metric table repartition fuzz target by @WenyXu in #7754
test: filter on region_peers table by @waynexia in #7864

⚙️ Miscellaneous Tasks

ci: upload artifacts use s3 proxy by @daviderli614 in #7800
chore: update visibility of BatchToRecordBatchAdapter::new by @sunng87 in #7817
chore: remove GrpcQueryHandler::put_record_batch by @v0y4g3r in #7844
ci: remove redundant directory level when uploading artifacts to S3 by @daviderli614 in #7852
chore: remove unused rexpect dev-dependency by @fengys1996 in #7865
chore: refine track memory metrics semantics by @fengjiachun in #7874
chore: update rust toolchain to 2026-03-21 by @sunng87 in #7849
chore: update ignore list for AI related by @shuiyisong in #7896
chore: Update Dockerfile by @daviderli614 in #7893
ci: update dev-builder image tag by @github-actions[bot] in #7894
chore: remove unused deps using udeps by @shuiyisong in #7906
chore: memory limit comment by @fengjiachun in #7914
chore: bump version to 1.0.0 by @evenyag in #7935

New Contributors

@ynachi made their first contribution in #7882
@cuiweixie made their first contribution in #7866
@Boudewijn26 made their first contribution in #7857
@maximk777 made their first contribution in #7503

All Contributors

We would like to thank the following contributors from the GreptimeDB community:

@Boudewijn26, @MichaelScofield, @WenyXu, @YZL0v3ZZ, @ZonaHex, @cuiweixie, @daviderli614, @discord9, @evenyag, @fengjiachun, @fengys1996, @github-actions[bot], @killme2008, @maximk777, @shuiyisong, @sunng87, @v0y4g3r, @waynexia, @yihong0618, @ynachi

GreptimeTeam/greptimedb v1.0.0 Release v1.0.0 on GitHub