az_schema: Inspect a dataset schema without collecting data

In quak: Query 'Azure Data Lake Storage Gen2' with 'DuckDB'

Inspect a dataset schema without collecting data

Description

Uses DuckDB's ⁠DESCRIBE SELECT⁠ over a remote scan and returns only column names and DuckDB types.

Usage

az_schema(conn, url, format = NULL)

Arguments

conn	A DuckDB connection.
url	Character scalar. Azure Blob URL.
format	Optional format override. One of "parquet", "csv", "json", or "delta". When NULL, inferred from url.

Value

A tibble-like data frame with columns name and type.

Examples

## Not run: 
# Requires a live Azure account, credentials, and network access.
conn <- az_conn()
az_schema(conn, "abfss://container@account/data/*.parquet")

## End(Not run)

quak documentation built on June 9, 2026, 5:09 p.m.