Is your feature request related to a problem? Please describe.

The current Google.cloud.spanner library has very limited functionalities compared to other db libraries (e.g., bigquery) and some of the key APIs are missing. For example,

get_table
table
list_tables
schema
query
execute

I would like to have the above functions added to the library.

Describe the solution you'd like

These functions could be implementable via the INFORMATION_SCHEMA query syntax.