MyScaleDB v1.8.0

Features & Improvements

• Add support for multiple distance() functions in a single query.
• Resolve score calculation error in distributed hybrid search.
• Improve filterd vector search performance by intrudcing a setting for parallel reading in performPrefilter().
• Enhance TextSearch() and HybridSearch() to support multi-column FTS indexing.

Docker Image

docker pull myscale/myscaledb:1.8.0

MyScaleDB v1.7.1

Features & Improvements

• Add support for full-text search across multiple text columns.
• Optimize queries per second (QPS) for TextSearch during inserts.
• Correct BM25 calculation error in distributed text search.
• Implement parallel reading in performPrefilter().
• Optimize filter search for large datasets.

Fix

• Resolve error when performing hybrid search on distributed tables.
• Fix segmentation fault when executing parallel text search selects with FINAL.
• Address various bugs in the full-text search function.
• Fix a critical issue with removing the FTS index cache directory.
• Resolve the "failed to load Tantivy index file" error when deleting parts.
• Resolve the tantivy index loading error.

Docker Image

docker pull myscale/myscaledb:1.7.1

MyScaleDB v1.6.4

Features & Improvements

• Hybrid Search Refactor.
• Support basic paging operations for hybrid, vector, and text searches.
• Add parameters enable_nlq and operator to TextSearch() and HybridSearch().
• Add a query setting, enbale_fts_index_for_string_functions, to disable the FTS index for string functions by default.
• Add the icu multilingual tokenizer for the FTS index.
• Improve SELECT performance when PREWHERE includes the partition key.
• Optimize the logic for loading FTS indexes.
• Upgrade the runtime to Ubuntu 22.04.
• Enhance SELECT FINAL performance with two-stage vector search enabled.
• Fix TextSearch performance degradation after lightweight delete.
• Fix the vector search performance issue related to low filter ratios.

Fix

• Resolve the issue where ReplacingMergetree destroys the row IDs map data of the decoupled index

Docker Image

docker pull myscale/myscaledb:1.6.4

MyScaleDB v1.6

Features & Improvements

• Improve SELECT performance when PREWHERE includes the partition key

Fix

• Resolve the problem of mismatched checksums in FTS index replicas
• Resolve the problem of insufficient results returned by ScaNN index
• Fix the bug that the write speed limit does not work when writing data to s3

Docker Image

docker pull myscale/myscaledb:1.6

MyScaleDB v1.5

Features & Improvements

• Full-text search with BM25 scoring implemented with the Tantivy library
• Conduct an in-depth refactoring of the vector index
• Add default vector index type

Docker Image

docker pull myscale/myscaledb:1.5

MyScaleDB v1.4

Features & Improvements

• Add support for multiple column vector indexes.
• Refactor vector index manager.

Fixes

• Resolve an issue where canceling a vector index build causing the index to freeze.
• Address an issue where the vector index might not update properly when using the ReplicatedMergeTree engine.

Docker Image

docker pull myscale/myscaledb:1.4