Check if container exists in database

Check if container exists in database

Usage

docdb_exists(src, key, ...)

Arguments

src

Source object, result of call to any of functions src_mongo(), src_sqlite(), src_elastic(), src_couchdb() or src_postgres()

key

(character) A key as name of the container (corresponds to parameter collection for MongoDB, dbname for CouchDB, index for Elasticsearch and to a table name for SQLite and for PostgreSQL)

...

Passed to functions:

• MongoDB: count() in mongolite::mongo()

• RSQLite: DBI::dbListTables()

• Elasticsearch: elastic::index_exists()

• CouchDB: sofa::db_info()

• PostgreSQL: DBI::dbListTables()

• DuckDB: DBI::dbListTables()

Value

(logical) TRUE or FALSE to indicate existence of container key in database

Examples

if (FALSE) {
src <- src_sqlite()
docdb_exists(src, "nonexistingcontainer")
docdb_create(src, "mtcars", mtcars)
docdb_exists(src, "mtcars")
}