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 of non-existence of the specified table is indicated by the return code 0 or by the error message –4004 Unknown table name.
A table only exists for a user if the user has a privilege on this table.