Frees statement resources.
DROP STATEMENT [ owner.]statement-name
EXEC SQL DROP STATEMENT S1; EXEC SQL DROP STATEMENT :stmt;
DROP STATEMENT frees resources used by the named prepared statement. These resources are allocated by a successful PREPARE statement, and are normally not freed until the database connection is released.
SQL—Vendor extension to ISO/ANSI SQL grammar.
Sybase—Not supported in Open Client/Open Server
Must have prepared the statement.