Skillintermediate

Pipelines Configuration

```jsonc // wrangler.jsonc { "pipelines": [ { "pipeline": "<STREAM_ID>", "binding": "STREAM" } ] } ```

Claude Code Knowledge Pack7/10/2026

Overview

Pipelines Configuration

Worker Binding

// wrangler.jsonc
{
  "pipelines": [
    { "pipeline": "<STREAM_ID>", "binding": "STREAM" }
  ]
}

Get stream ID: npx wrangler pipelines streams list

Schema (Structured Streams)

{
  "fields": [
    { "name": "user_id", "type": "string", "required": true },
    { "name": "event_type", "type": "string", "required": true },
    { "name": "amount", "type": "float64", "required": false },
    { "name": "timestamp", "type": "timestamp", "required": true }
  ]
}

Types: string, int32, int64, float32, float64, bool, timestamp, json, binary, list, struct

Stream Setup

# With schema
npx wrangler pipelines streams create my-stream --schema-file schema.json

# Unstructured (no validation)
npx wrangler pipelines streams create my-stream

# List/get/delete
npx wrangler pipelines streams list
npx wrangler pipelines streams get 
npx wrangler pipelines streams delete

Sink Configuration

R2 Data Catalog (Iceberg):

npx wrangler pipelines sinks create my-sink \\
  --type r2-data-catalog \\
  --bucket my-bucket --namespace default --table events \\
  --catalog-token $TOKEN \\
  --compression zstd --roll-interval 60

R2 Raw (Parquet):

npx wrangler pipelines sinks create my-sink \\
  --type r2 --bucket my-bucket --format parquet \\
  --path analytics/events \\
  --partitioning "year=%Y/month=%m/day=%d" \\
  --access-key-id $KEY --secret-access-key $SECRET

Option	Values	Guidance
`--compression`	`zstd`, `snappy`, `gzip`	`zstd` best ratio, `snappy` fastest
`--roll-interval`	Seconds	Low latency: 10-60, Query perf: 300
`--roll-size`	MB	Larger = better compression

Pipeline Creation

npx wrangler pipelines create my-pipeline \\
  --sql "INSERT INTO my_sink SELECT * FROM my_stream WHERE event_type = 'purchase'"

⚠️ Pipelines are immutable - cannot modify SQL. Must delete/recreate.

Credentials

Type	Permission	Get From
Catalog token	R2 Admin Read & Write	Dashboard → R2 → API tokens
R2 credentials	Object Read & Write	`wrangler r2 bucket create` output
HTTP ingest token	Workers Pipeline Send	Dashboard → Workers → API tokens

Complete Example

npx wrangler r2 bucket create my-bucket
npx wrangler r2 bucket catalog enable my-bucket
npx wrangler pipelines streams create my-stream --schema-file schema.json
npx wrangler pipelines sinks create my-sink --type r2-data-catalog --bucket my-bucket ...
npx wrangler pipelines create my-pipeline --sql "INSERT INTO my_sink SELECT * FROM my_stream"
npx wrangler deploy