is_table_path: Table paths

In dbplyr: A 'dplyr' Back End for Databases

Table paths

Description

dbplyr standardises all the ways of referring to a table (i.e. a single string, a string wrapped in I(), a DBI::Id() and the results of in_schema() and in_catalog()) into a table "path" of the form table, schema.table, or catalog.schema.path. A table path is always suitable for inlining into a query, so user input is quoted unless it is wrapped in I().

This is primarily for internal usage, but you may need to work with it if you're implementing a backend, and you need to compute with the table path, not just pass it on unchanged to some other dbplyr function.

• is_table_path() returns TRUE if the object is a table_path.

• as_table_path() coerces known table identifiers to a table_path.

• check_table_path() throws an error if the object is not a table_path.

• table_path_name() returns the last component of the table path (i.e. the name of the table).

• table_path_components() returns a list containing the components of each table path.

A table_path object can technically be a vector of table paths, but you will never see this in table paths constructed from user inputs.

Usage

is_table_path(x)

table_path_name(x, con)

table_path_components(x, con)

check_table_path(x, error_arg = caller_arg(x), error_call = caller_env())

as_table_path(x, con, error_arg = caller_arg(x), error_call = caller_env())

dbplyr documentation built on May 29, 2024, 6:19 a.m.