nealrichardson commented on a change in pull request #8122:
URL: https://github.com/apache/arrow/pull/8122#discussion_r492850251
##########
File path: r/R/parquet.R
##########
@@ -409,10 +420,20 @@ ParquetFileWriter$create <- function(schema,
#'
#' @section Methods:
#'
-#' - `$ReadTable(col_select)`: get an `arrow::Table` from the file, possibly
-#' with columns filtered by a character vector of column names or a
-#' `tidyselect` specification.
+#' - `$ReadTable(column_indices)`: get an `arrow::Table` from the file. The
optional
+#' `column_indices=` argument is a 0-based integer vector indicating which
columns to retain.
+#' - `$ReadRowGroup(i, column_indices)`: get an `arrow::Table` by reading the
`i`th row group.
Review comment:
Is `i` also 0-based?
##########
File path: r/R/parquet.R
##########
@@ -409,10 +420,20 @@ ParquetFileWriter$create <- function(schema,
#'
#' @section Methods:
#'
-#' - `$ReadTable(col_select)`: get an `arrow::Table` from the file, possibly
-#' with columns filtered by a character vector of column names or a
-#' `tidyselect` specification.
+#' - `$ReadTable(column_indices)`: get an `arrow::Table` from the file. The
optional
+#' `column_indices=` argument is a 0-based integer vector indicating which
columns to retain.
+#' - `$ReadRowGroup(i, column_indices)`: get an `arrow::Table` by reading the
`i`th row group.
+#' The optional `column_indices=` argument is a 0-based integer vector
indicating which columns to retain.
+#' - `$ReadRowGroups(row_groups, column_indices)`: get an `arrow::Table` by
reading several row groups.
Review comment:
are `row_groups` also integers? 0-based?
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