docdb_exists: Check if container exists in database

In nodbi: 'NoSQL' Database Connector

Check if container exists in database

Description

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() src_duckdb() or src_postgres()
key	(character) The name of the container in the database backend (corresponds to collection for MongoDB, dbname for CouchDB, index for Elasticsearch and to a table name for DuckDb, SQLite and 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. Note this does not mean that the container holds any documents.

Examples

## Not run: 
src <- src_sqlite()
docdb_exists(src, "nonexistingcontainer")
docdb_create(src, "mtcars", mtcars)
docdb_exists(src, "mtcars")

## End(Not run)

nodbi documentation built on Sept. 24, 2023, 1:08 a.m.