An EXISTS TABLE statement (exists_table_statement) indicates whether or not a table exists.
<exists_table_statement> ::= EXISTS TABLE <table_name>
The specified table must be a base table, view table, or a synonym.
The existence or non-existence of the specified table is indicated by the return code 0 or by the error message -4004 UNKNOWN TABLE NAME.
A table exists for a user only if the user has a privilege on this table.