mydump,importer: skip redundant `CastColumnValue` for parquet import#67054

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joechenrh wants to merge 47 commits intopingcap:masterfrom

joechenrh:optimize-encoding-v2

Commits on Mar 14, 2026

Commits on Mar 16, 2026

Commits on Mar 17, 2026

Commits on Mar 19, 2026

mydump: cache MaxDefinitionLevel on columnIterator to avoid interface dispatch per row

joechenrh
and
claude
committed
mydump: deduplicate estimateRowSize by returning size from readSingleRow

joechenrh
and
claude
committed
importer: merge getRow+fillRow into single-pass buildRecord with pre-classified columns

joechenrh
and
claude
committed

Commits on Apr 17, 2026