Extract an axis-resolving query's result as a data.frame.

The query-string counterpart of get_dataframe(). The query must resolve to an axis (possibly mask-filtered).

Usage

get_dataframe_query(daf, query, columns = NULL, cache = TRUE)

Arguments

daf

A DafReader.

query

A query string resolving to an axis.

columns

Optional character vector of column names to include in the result. Defaults to all vectors on the resolved axis.

cache

Logical; if TRUE (default), serve from the query cache.

Value

A data.frame with axis-entry rownames.

See also

get_dataframe(), get_tidy()

Examples

d <- memory_daf()
add_axis(d, "donor", c("d1", "d2"))
set_vector(d, "donor", "age", c(20L, 30L))
get_dataframe_query(d, "@ donor")
#>    age
#> d1  20
#> d2  30