Columnar Data, from the inside out Compare the layers →

Iceberg and Delta · local metadata

Follow your table’s references.

Select metadata JSON or Delta log files with an explicit set of companion files. A directory selection preserves their relative paths. Files stay in this tab; nothing is uploaded or saved in browser storage, and references never trigger network requests.

Iceberg reference layers · Delta log guide

Local file inspection requires JavaScript. The guides and downloadable native examples remain readable.

Limits: 512 supplied files, 32 JSON/log documents, 2 MiB per document and 8 MiB of metadata total. Parquet, Avro and other companion files are inventoried without reading their bytes. JSON, JSONL, NDJSON and _last_checkpoint files are candidates.

Map an original path prefix explicitly

For metadata containing absolute paths such as s3://bucket/table/, enter that exact prefix and its corresponding directory in the supplied inventory. The prefix must end with /. The target has no trailing /; leave it empty for the inventory root. No basename guessing or remote access is used.

Mapping takes effect on the next inspection. It only changes reference matching; it does not validate any companion file.

Select files to start.