[oschulz]

• I have reviewed all the code in this pull request and deem it of the standard expected for this project.

Written by Claude (Anthropic) in Claude Code, a Fable 5.1 session at xhigh effort, under the guidance of @oschulz, who asked for this draft. Updated for release as 0.6.27 by an Opus 5.5 session at xhigh effort. Opened as a draft until LegendHDF5IO 0.2.0 is in the LEGEND registry.

Port to LegendHDF5IO 0.2, whose tables are lazy LH5LazyTables instead of TypedTables tables: reading a table opens a column only when it is used, rows are read in blocks or by index, and vcat and innermerge of lazy tables stay lazy. The extension and read_ldata are adapted so that the public behavior stays the same, apart from two result types noted below, and tier_data[tier, filekeys] gains a method for several file keys.

• Require LegendHDF5IO 0.2 in the extension compat; 0.1 is no longer supported. Pkg enforces the compat of weak dependencies, so environments that keep LegendHDF5IO 0.1 keep LegendDataManagement 0.6.26. The API of LegendDataManagement itself only gains a method, so the version is 0.6.27, and packages bounded to 0.6 need no compat release.
• Load lazily read tables in _load_all_keys, and read rows of lazy tables through the table itself rather than through Table(tbl), which 0.2 refuses.
• Classify lazy table rows by their columns, and load chained and joined lazy tables like plain lazy tables.
• Read rows by index through LegendHDF5IO's scattered reads instead of bridging gaps between selected rows by hand.
• tier_data[tier, filekeys::AbstractVector{<:FileKey}] returns the paths of several file keys.
• load_partition_ch reads partition rows through the lazy table instead of a Table of it.

Rebased onto main after #246. Verified: the test suite passes against LegendHDF5IO 0.2.0 (one pre-existing broken test), and the LegendHDF5IO suite's LegendDataManagement check passes against this branch. In 14 reads of LegendTestData files, covering the dsp, hit, pls, raw and evt tiers, read_ldata returns the same types as main with LegendHDF5IO 0.1.19, except for two that come from LegendHDF5IO 0.2: Bool columns are Vector{Bool} instead of BitVector, and the tables nested in an event tier, such as geds, are StructArrays instead of Tables.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.55%. Comparing base (1ebfeb3) to head (4c26368).

Files with missing lines	Patch %	Lines
src/utils/data_utils.jl	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #247      +/-   ##
==========================================
- Coverage   63.75%   63.55%   -0.21%     
==========================================
  Files          27       27              
  Lines        2842     2818      -24     
==========================================
- Hits         1812     1791      -21     
+ Misses       1030     1027       -3     

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[oschulz]

@theHenks can you test if this work in full production?