Input Parquet File

How it fits

Typical backends

Caveats

• I/O contractThe bound slot is a directory and every Parquet file in it is read; all cell values come out as strings, so downstream stages must cast typed columns themselves.
• Hard constraintcolumns left empty reads every column, while a non-empty list projects only the named columns and an unknown name fails the read.
• FallbackNull cells are emitted as empty strings, so downstream filters cannot distinguish a true null from an empty string without extra context.
• Parameter interactionWith repeat off each file is read once and the component idles; with it on the directory is re-read with check_interval seconds between passes, and a non-positive interval produces a tight continuous re-read loop.
• State lifetimeThe bound slot and all knobs bind once at startup, so changing any of them requires a redeploy.