# Repeated Full Scan

> A defect in which large data is scanned or materialized several times where one pass would do.

Record: `lexicon:repeated-full-scan`
Kind: anti-pattern
Layer: [Execution Core](https://banes-lab.com/records/layer/execution-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-repeated-full-scan

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Fuse Passes](https://banes-lab.com/records/lexicon/fuse-passes.md) and before [Random Access over a Stream](https://banes-lab.com/records/lexicon/random-access-over-a-stream.md).

## Category

- [Streaming / Pipeline / Dataflow Processing](https://banes-lab.com/records/lexicon-category/streaming-pipeline-dataflow-processing.md)

## Violates

- [Single-Pass Processing](https://banes-lab.com/records/architecture/single-pass-processing.md)

## Linked from

- [Streaming / Pipeline / Dataflow Processing](https://banes-lab.com/ontology/principles/architecture-category-streaming-pipeline-dataflow-processing.md)