Show the details of an Arrow Execution Plan

This is a function which gives more details about the logical query plan that will be executed when evaluating an arrow_dplyr_query object. It calls the C++ ExecPlan object's print method. Functionally, it is similar to dplyr::explain(). This function is used as the dplyr::explain() and dplyr::show_query() methods.

show_exec_plan(x)

Arguments

x

an arrow_dplyr_query to print the ExecPlan for.

Value

x, invisibly.

Examples

library(dplyr)
mtcars %>%
  arrow_table() %>%
  filter(mpg > 20) %>%
  mutate(x = gear/carb) %>%
  show_exec_plan()
#> ExecPlan with 4 nodes:
#> 3:SinkNode{}
#>   2:ProjectNode{projection=[mpg, cyl, disp, hp, drat, wt, qsec, vs, am, gear, carb, "x": divide(cast(gear, {to_type=double, allow_int_overflow=false, allow_time_truncate=false, allow_time_overflow=false, allow_decimal_truncate=false, allow_float_truncate=false, allow_invalid_utf8=false}), cast(carb, {to_type=double, allow_int_overflow=false, allow_time_truncate=false, allow_time_overflow=false, allow_decimal_truncate=false, allow_float_truncate=false, allow_invalid_utf8=false}))]}
#>     1:FilterNode{filter=(mpg > 20)}
#>       0:TableSourceNode{}