parse
SHOW POLICIES FOR xy
----
SHOW POLICIES FOR xy
SHOW POLICIES FOR xy -- fully parenthesized
SHOW POLICIES FOR xy -- literals removed
SHOW POLICIES FOR _ -- identifiers removed

parse
SHOW POLICIES FOR schema.xy
----
SHOW POLICIES FOR schema.xy
SHOW POLICIES FOR schema.xy -- fully parenthesized
SHOW POLICIES FOR schema.xy -- literals removed
SHOW POLICIES FOR _._ -- identifiers removed

parse
SHOW POLICIES FOR db.schema.xy
----
SHOW POLICIES FOR db.schema.xy
SHOW POLICIES FOR db.schema.xy -- fully parenthesized
SHOW POLICIES FOR db.schema.xy -- literals removed
SHOW POLICIES FOR _._._ -- identifiers removed

# Must specify table name
error
SHOW POLICIES
----
at or near "EOF": syntax error
DETAIL: source SQL:
SHOW POLICIES
             ^
HINT: try \h SHOW POLICIES
