v1.0.4

openglacier Core v1.0.4 — antaa palaa

Time travel, views and windows: OGML grows up.

v1.0.4 gathers the work of the unpublished 1.0.3. Public 1.0.x builds keep storing their data with
Glacier 5; the column-segment store developed alongside arrives with v2.0.0.

Language

• Past states and history: on c as of … reads a collection as it was, on c history reads its stored
  versions.
• Views: define view and undefine view, versioned and read per Place. A view reads like a collection, as
  a source, a union branch or a lookup, with the caller's variables. Materialized views are kept per scope
  until a collection they read changes.
• window: lag, lead, cumsum, first, last and row_number over ordered partitions.
• fill adds the rows missing from a grid (fill month from 1 to 12 step 1 by region), so series have
  no holes.
• Fiscal dates: fiscal_year, fiscal_month, fiscal_start and fiscal_end, for years that close at the end
  of any month.
• let can hold the rows of a query, and takes defaults.
• union branches and lookup stages run any pipeline; lookups match on prefixes; group collects values with
  list.
• Sorting values of different kinds is refused with an error instead of stopping the daemon.

Engine

• Filters move towards the source past stages that leave their fields and rows alone.
• Comparisons, distinct, group, pivot and Top-N run on typed batches with a shared key table; Top-N keeps its
  rows in a heap.
• Writes stream into one transaction behind a streamed read, and several writes can share one transaction.
• Streaming responses are written in batches.
• Every query stage is declared once, in a catalogue.

Apps

• Apps can deliver standard views from their definitions.
• An App opens only to the Place roles it lists.

Builds

• Release builds align loops on 64 bytes, so performance no longer moves with unrelated changes of code
  layout.

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Full Changelog: v1.0.2...v1.0.4

Small core, long life.