spec_sql_exists_table: spec_sql_exists_table

In DBItest: Testing DBI Backends

spec_sql_exists_table

Description

spec_sql_exists_table

Value

dbExistsTable() returns a logical scalar, TRUE if the table or view specified by the name argument exists, FALSE otherwise.

This includes temporary tables if supported by the database.

Failure modes

An error is raised when calling this method for a closed or invalid connection. An error is also raised if name cannot be processed with dbQuoteIdentifier() or if this results in a non-scalar.

Specification

The name argument is processed as follows, to support databases that allow non-syntactic names for their objects:

• If an unquoted table name as string: dbExistsTable() will do the quoting, perhaps by calling dbQuoteIdentifier(conn, x = name)

• If the result of a call to dbQuoteIdentifier(): no more quoting is done

For all tables listed by dbListTables(), dbExistsTable() returns TRUE.

See Also

Other sql specifications: spec_sql_append_table, spec_sql_create_table, spec_sql_list_fields, spec_sql_list_objects, spec_sql_list_tables, spec_sql_quote_identifier, spec_sql_quote_literal, spec_sql_quote_string, spec_sql_read_table, spec_sql_remove_table, spec_sql_unquote_identifier, spec_sql_write_table

DBItest documentation built on June 22, 2024, 11:55 a.m.