SAP HANA存储过程中的动态SQL语句(Dynamic SQL)

-- run 1_datatype_data.sql before running this script 
ALTER SESSION SET CURRENT_SCHEMA = SqlScriptDocumentation;

drop procedure dynamic_sql_proc; 
CREATE PROCEDURE dynamic_sql_proc LANGUAGE SQLSCRIPT AS 
    v_sql1   VARCHAR(1024); 
    v_sql2   VARCHAR(1024); 
    v_msg    VARCHAR(200); 
BEGIN 
    init_proc();

    v_sql1 := 'INSERT INTO "MESSAGE_BOX" VALUES (''First message from Dynamic SQL'', SYSTIMESTAMP)'; 
    EXEC :v_sql1;

    v_sql2 := 'INSERT INTO message_box VALUES (''Second message from Dynamic SQL'', SYSTIMESTAMP)'; 
    EXEC :v_sql2;

    v_sql1 := 'Third message from Dynamic SQL'; 
    EXEC 'INSERT INTO message_box VALUES (''' || :v_sql1 || ''', SYSTIMESTAMP)'; 
END;

call dynamic_sql_proc(); 
select message from message_box;