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Summary

This PR adds documentation for PPL Timechart Functions introduced in OpenSearch v3.4.0.

Reports Created

  • Release report: docs/releases/v3.4.0/features/sql/ppl-timechart-functions.md
  • Feature report: docs/features/sql/ppl-timechart-command.md

Key Changes in v3.4.0

  • Added per_second, per_minute, per_hour, per_day rate-based aggregation functions
  • Added timefield option to specify custom timestamp field
  • Fixed millisecond span support (was incorrectly converted to microseconds)
  • Merged timechart and chart implementations for better maintainability

Related PRs

  • #4464: Add per_second function support
  • #4531: Add per_minute, per_hour, per_day functions
  • #4672: Support millisecond span
  • #4755: Merge timechart and chart implementations
  • #4784: Add timefield option

Closes #1624

@tkykenmt tkykenmt merged commit d069fe1 into main Jan 11, 2026
@tkykenmt tkykenmt deleted the docs/ppl-timechart-functions-v3.4.0 branch January 11, 2026 11:48
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[feature] PPL Timechart Functions

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