PL / SQL程序中出现错误，警告“缺少或无效的选项”

Question

create or replace PROCEDURE PROC_OPE AS 
  FILE_PATH         VARCHAR2(150) := 'd:\OPENTOW_'||trunc(sysdate)||'.csv';                       
  QUERY_STRING      VARCHAR2(100) := 'SPOOL'||FILE_PATH;
  STATUS            VARCHAR2(50)  := 'Withdrawn';
  DATEFORMAT        VARCHAR2(50)  := 'dd/mm/yyyy hh24:mi:ss';
  TIMEFORMAT        VARCHAR2(50)  := 'hh24:mi:ss';
  YES_FLAG          VARCHAR(3)    := 'Yes';
  NO_FLAG           VARCHAR(3)    := 'No';
  BLANK_SPACE       VARCHAR2(1)   := ' ';
BEGIN
  execute immediate 'SET ECHO OFF';
  execute immediate 'SET FEEDBACK OFF';
  execute immediate QUERY_STRING;

I am getting this error

Error Message:` ORA-00922: missing or invalid option ORA-06512: at "WS", line 12 ORA-06512: at line 2 Process exited.

Can anyone please help me?

Answer 1

SPOOL, SET ECHO OFF, SET FEEDBACK OFF - they are all SQL-Plus commands, not SQL commands.

If you try to run any of them using EXECUTE IMMEDIATE, you will get this error, for example:

BEGIN
 execute immediate 'SET ECHO OFF';
END;
/
Error starting at line : 1 in command -
BEGIN
 execute immediate 'SET ECHO OFF';
END;
Error report -
ORA-00922: brakująca lub niepoprawna opcja
ORA-06512: przy linia 2
00922. 00000 -  "missing or invalid option"

Sql-Plus is a client utility.
SQL is a structured query language

EXECUTE IMMEDIATE accepts ony SQL commands , you cannot run SQL-Plus in EXECUTE IMMEDIATE, they are ony available in SQL-PLus, or (some of them) is SQL-Developer, but not in other clients like JDBC, ODBC.