memdb_frame function

Create a database table in temporary in-memory database.

memdb_frame() works like tibble::tibble(), but instead of creating a new data frame in R, it creates a table in src_memdb().

memdb_frame(..., .name = unique_table_name())

tbl_memdb(df, name = deparse(substitute(df)))

src_memdb()

Arguments

• ...: <dynamic-dots> A set of name-value pairs. These arguments are processed with rlang::quos() and support unquote via !! and unquote-splice via !!!. Use := to create columns that start with a dot.

  Arguments are evaluated sequentially. You can refer to previously created elements directly or using the .data

  pronoun. To refer explicitly to objects in the calling environment, use !! or .env , e.g. !!.data or .env$.data for the special case of an object named .data.

• df: Data frame to copy

• name, .name: Name of table in database: defaults to a random name that's unlikely to conflict with an existing table.

Examples

library(dplyr)
df <- memdb_frame(x = runif(100), y = runif(100))
df %>% arrange(x)
df %>% arrange(x) %>% show_query()

mtcars_db <- tbl_memdb(mtcars)
mtcars_db %>% group_by(cyl) %>% summarise(n = n()) %>% show_query()