v0.4.0 Release

[andyfengHKU]

We are entering a new release cycle for v0.4.0. The estimated release date is around April 24th.

Changes

Breaking Changes

• Import/Export database
• Copy from subquery
• Bulk insertion into non-empty database
• External database scanner
  • DuckDB scanner
  • Postgres scanner
• Scan from pandas pyarrow backend (Pandas pyarrow backend #3058)

Usability Improvements

• CLI improvements (Improved CLI pretty print truncation #2869, Added shell commands to control truncation #2876, Improved shell copy paste #2930, Improved error messages for CLI commands and fixed shell testing issues #2953, Windows shell improvements #3253)
• Functions
  • List_reverse (List reverse #2927)
  • Levenshtein (Implement levenshtein function #2950)
  • Array functions (Implement array functions #3087)
  • initCap & concat (Implement initcap/concat functions #3161)
  • Utility hash functions (Add utility hash functions #3212)
• Export query result to polars (Support Polars DataFrame export from QueryResult #2985, external contributor)
• Python API lint (Python API typing, lint, config/makefile #3023, external contributor)
• Progress bar (Implemented Progress Bar #3051)
• Support read after update in the same statement (Support read after update #3126)

Performance Improvements

• Python import cache (Implement Python Import Caching #2905)
• Internal ID compression (Enable compression for INTERNAL_ID #3116)
• List write performance improvement (List offset Column Refactor #3219, Improve the performance of VAR_LIST storage layout #3093). (I don't know if we need to write this)
• Avoid busy loop when max threads has reached (Optimize task scheduler #3233, external contributor)

TODOs

Issue

• Disable import/export RDF GRAPH
• Enable import/export REL GROUP
• Multiple statements query in all language bindings & explorer (# 3214)
• StartNode, EndNode & extend direction

Benchmarks

• External database scanner
• Internal ID compression

Documentation

• Import/Export database
• Functions
  • List_reverse
  • Levenshtein
  • Similarity search
  • Array functions
  • Initcap & concat
  • Coalesce and ifnull
  • list to string
  • Utility hash functions
• Copy from subquery
• Bulk insertion into non-empty database
• DuckDB database scanner
• Postgres database scanner
• Scan from pandas pyarrow backend
• Support read after update in the same statement
• Support UNWIND on ARRAY type: Allow UNWIND for ARRAY data type #3401
• Rename VAR_LIST to LIST, FIXED_LIST to ARRAY
• ARRAY now supports any child data type.
• Modify table_info output: Modify output for table_info command in rel table #2991
• Remove deprecated function read_pandas()

Blog Post

• Import/Export database
• Copy from subquery
• Bulk insertion into non-empty database
• External database scanner
• Scan from pandas pyarrow backend

[andyfengHKU]

Closed because we have released.