Check whether data exists at an Azure path

For an exact file or glob pattern, checks whether DuckDB's glob() returns at least one match. For a plain path, also probes url/** so dataset prefixes count as existing when they contain at least one object.

Usage

az_exists(conn, url)

Arguments

conn: A DuckDB connection.
url: Character scalar. Azure Blob URL or glob pattern.

Value

Logical scalar.

Examples

if (FALSE) { # \dontrun{
# Requires a live Azure account, credentials, and network access.
conn <- az_conn()
az_exists(conn, "abfss://container@account/data/sales")
} # }