For vectra_node inputs (lazy queries from any format: CSV, SQLite, TIFF,
or another .vtr), data is streamed batch-by-batch to disk without
materializing the full result in memory. Each batch becomes one row group.
The output file is written atomically (via temp file + rename) so readers
never see a partial file.
Arguments
- x
A vectra_node (lazy query) or a data.frame.
- path
File path for the output .vtr file.
- ...
Additional arguments passed to methods.
Details
For data.frame inputs, the data is written directly from memory.
Examples
# From a data.frame
f <- tempfile(fileext = ".vtr")
write_vtr(mtcars, f)
# Streaming format conversion (CSV -> VTR)
csv <- tempfile(fileext = ".csv")
write.csv(mtcars, csv, row.names = FALSE)
f2 <- tempfile(fileext = ".vtr")
tbl_csv(csv) |> write_vtr(f2)
unlink(c(f, f2, csv))