Check if cache table is indexed — tw_check_cache

Tested only with SQLite and MySql. May work with other drivers. Used to check if given cache table is indexed (if created with any version of tidywikidatar before 0.6, they are probably not indexed and less efficient).

Usage

tw_check_cache_index(
  table_name = NULL,
  type = "item",
  show_details = FALSE,
  language = tidywikidatar::tw_get_language(),
  response_language = tidywikidatar::tw_get_language(),
  cache = NULL,
  cache_connection = NULL,
  disconnect_db = TRUE
)

Arguments

table_name: Name of the table in the database. If given, it takes precedence over other parameters.
type: Defaults to "item". Type of cache file to output. Values typically used by tidywikidatar include "item", "search_item", "search_property", and "qualifier".
show_details: Logical, defaults to FALSE. If FALSE, return a logical vector of length one (TRUE if the table was indexed, FALSE if it was not). If TRUE, returns a data frame with more details about the index.
language: Defaults to language set with tw_set_language(); "en" if not set. Used to limit the data to be cached. Use "all_available" to keep all data. For available values, see https://www.wikidata.org/wiki/Help:Wikimedia_language_codes/lists/all
response_language: Defaults to language set with tw_set_language(); "en" if not set. Relevant only when type is set to "search_item" or "search_property". See tw_search() for details.
cache: Defaults to NULL. If given, it should be given either TRUE or FALSE. Typically set with tw_enable_cache() or tw_disable_cache().
cache_connection: Defaults to NULL. If NULL, and caching is enabled, tidywikidatar will use a local sqlite database. A custom connection to other databases can be given (see vignette caching for details).
disconnect_db: Defaults to TRUE. If FALSE, leaves the connection to cache open.

Value

If show_details is set to FALSE, return a logical vector of length one (TRUE if the table was indexed, FALSE if it was not). If show_details is set to TRUE, returns a data frame with more details about the index.

Examples

if (interactive()) {
  tw_enable_cache()
  tw_set_cache_folder(path = fs::path(
    fs::path_home_r(),
    "R",
    "tw_data"
  ))

  tw_set_language(language = "en")

  tw_check_cache_index()
}