v5.0.0

Changes from v4.8.8:

• Breaking. Update to Apache Arrow v8.0, remove export of arrow Type enum. To specify types using integer type ids, use the Apache Arrow Type export directly. Arrow v8.0 has a significant number of API changes that affect calls to Arrow tables produced by Arquero. For example, arrowTable.getColumn() no longer exists, use arrowTable.getChild() instead.
• Fix pivot count aggregation to respect pivot keys. (#273)
• Update dependencies.

v4.8.8

Changes from v4.8.7:

• Fix version number export (#258) (thanks @domoritz!)

v4.8.7

Changes from v4.8.6:

• Fix rollup build config for node.js. (#238)

v4.8.6

Changes from v4.8.5:

• Fix early termination for filtered table scans. (#235)

v4.8.5

Changes from v4.8.4:

• Fix operator parsing lookup key to include rolling window frame information. (#232)

v4.8.4

Changes from v4.8.3:

• Fix Arrow vector builder for millisecond dates. (#213)

v4.8.3

Changes from v4.8.2:

• Fix print() method number argument handling. (thanks @bmesuere!)

v4.8.2

Changes from v4.8.1:

• Fix spread() column generation bug. (#209)

v4.8.1

Changes from v4.8.0:

• Fix selection helper return typings. (#203)
• Update dependencies, CI node versions.

v4.8.0

Changes from v4.7.2:

• Add escape() expression helper to "escape" JavaScript functions and values from internal parsing.
• Add names() selection helper for renaming columns by index. (#195)
• Add support for array literals and escaped values in expression parsing.
• Fix rollup() output early exit condition to support literal expressions without aggregate operations.
• Improve TypeScript types. (#182)

Description

This version adds the aq.escape() expression helper: this allows users to pass in JavaScript functions that are invoked as-is to process row objects: no internal parsing and rewriting, thus supporting closures! The helper can be applied anywhere Arquero accepts single-table table expressions, though note that it sidesteps internal optimizations and breaks portability (serialization) of Arquero queries to worker threads or other data sources. The escape() function also accepts literal values, for example allowing Date or Map instances to be assigned directly as a column values.

This version also adds the aq.names() selection helper that makes it easier to select and rename columns based on their integer column indices.