vectra (version 0.6.2)

tbl_sqlite: Create a lazy table reference from a SQLite database

Description

Opens a SQLite database and lazily scans a table. Column types are inferred from declared types in the CREATE TABLE statement. All filtering, grouping, and aggregation is handled by vectra's C engine --- no SQL parsing needed. No data is read until collect() is called.

Usage

tbl_sqlite(path, table, batch_size = .DEFAULT_BATCH_SIZE)

Value

A vectra_node object representing a lazy scan of the table.

Arguments

path

Path to a SQLite database file.

table

Name of the table to scan.

batch_size

Number of rows per batch (default 65536).

Examples

# \donttest{
f <- tempfile(fileext = ".sqlite")
write_sqlite(mtcars, f, "cars")
node <- tbl_sqlite(f, "cars")
node |> filter(cyl == 6) |> collect()
unlink(f)
# }