Add read_tbl_duckdb()

[Copilot]

Adds read_tbl_duckdb() to read tables from DuckDB database files, addressing the first item in #Column.

Changes

• New function read_tbl_duckdb(): Attaches a DuckDB file (read-only) and reads the specified table as a duckplyr frame with lazy evaluation support
• SQL injection prevention: Escapes paths (single quotes) and identifiers (double quotes)
• Deterministic database aliasing: Uses rlang::hash() on normalized path to avoid re-attaching the same database

Usage

# Read a table from an external DuckDB file
df <- read_tbl_duckdb("data.duckdb", "my_table")

# Supports schema and prudence options
df <- read_tbl_duckdb("data.duckdb", "my_table", schema = "analytics", prudence = "lavish")

# Works with dplyr pipelines (lazy)
read_tbl_duckdb("data.duckdb", "users") %>%
  filter(active) %>%
  select(id, name)

The database remains attached for the session to support lazy evaluation of downstream operations.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• cloud.r-project.org
  • Triggering command: /opt/R/4.5.2/lib/R/bin/exec/R /opt/R/4.5.2/lib/R/bin/exec/R --no-echo --no-restore -e install.packages("devtools",~+~repos="REDACTED") (dns block)
• cran.rstudio.com
  • Triggering command: /opt/R/4.5.2/lib/R/bin/exec/R /opt/R/4.5.2/lib/R/bin/exec/R --no-restore --no-echo --args nextArg--no-manualnextArg--no-build-vignettesnextArgduckplyr_1.1.3.9004.tar.gz (dns block)
  • Triggering command: /opt/R/4.5.2/lib/R/bin/exec/R /opt/R/4.5.2/lib/R/bin/exec/R --no-restore --no-echo --args nextArg--no-manualnextArg--no-build-vignettesnextArg--no-vignettesnextArgduckplyr_1.1.3.9004.tar.gz (dns block)
• extensions.duckdb.org
  • Triggering command: /opt/R/4.5.2/lib/R/bin/exec/R /opt/R/4.5.2/lib/R/bin/exec/R --slave --no-save --no-restore -f /tmp/Rtmp1c1AEr/callr-scr-2b7826470239 (dns block)
  • Triggering command: /opt/R/4.5.2/lib/R/bin/exec/R /opt/R/4.5.2/lib/R/bin/exec/R --slave --no-save --no-restore -f /tmp/Rtmpplycb5/callr-scr-3075710df2eb (dns block)
  • Triggering command: /opt/R/4.5.2/lib/R/bin/exec/R /opt/R/4.5.2/lib/R/bin/exec/R --slave --no-save --no-restore -f /tmp/RtmpOS8Mly/callr-scr-351f5cf19195 (dns block)
• packagemanager.posit.co
  • Triggering command: /opt/R/4.5.2/lib/R/bin/exec/R /opt/R/4.5.2/lib/R/bin/exec/R --no-restore --no-echo --args nextArg--no-manualnextArg--no-build-vignettesnextArgduckplyr_1.1.3.9004.tar.gz (dns block)
  • Triggering command: /opt/R/4.5.2/lib/R/bin/exec/R /opt/R/4.5.2/lib/R/bin/exec/R --no-restore --no-echo --args nextArg--no-manualnextArg--no-build-vignettesnextArg--no-vignettesnextArgduckplyr_1.1.3.9004.tar.gz (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add read_tbl_duckdb()</issue_title>
<issue_description>Read a table from an arbitrary database file.

• read_tbl_duckdb() : should that function be able to read from an arbitrary DuckDB file? Alternative: read_db_duckdb()
• db_attach() and db_detach() (similarly to db_exec())
• compute(temporary = FALSE) checks if the target schema is provided and actually is attached to another database, errors otherwise
• Should compute() accept a file name? Alternative: compute_db()</issue_description>

Comments on the Issue (you are @copilot in this section)

@krlmlr Descoping.

• Fixes Add read_tbl_duckdb() #414

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