ORA-00904 动态 SQL 块中的标识符无效错误

Question

我正在运行下面的，一旦执行，就会报告一个错误，告诉我 EST_ONE_ROW_MB 是一个无效的标识符。

我被告知我可能需要让动态 SQL 部分作为独立查询运行，以作为初始故障排除练习开始，但我对如何在这里编写子查询有点困惑将产生所需的输出并消除错误。

create or replace procedure JUST_ME is

--variables

l_dblink varchar2(100) := 'DB1';
file_handle UTL_FILE.file_type;
v_ts_name varchar2(30);
v_link_name varchar2(10);
v_csv_name varchar2(100);
EST_ONE_ROW_MB varchar2(100) ;
TOTAL_ROW_COUNT NUMBER;
SPACE_REQUIRED NUMBER;
TOT_OBJECT_SIZE_MB NUMBER;
v_Mv_name varchar2(100);
v_sql1 varchar2(1500);
cur SYS_REFCURSOR;
owner varchar2(100);
table_name varchar2(100);
driver_table varchar2(100);
mandatory_join varchar2(100);
C_TOTAL_ROW_COUNT varchar2(100);
v_total_driver_only varchar2(100);
--

begin


SELECT tablename into v_csv_name
FROM BOB01.BOB_new_table_tracker
WHERE
CREATED_AT = (select MAX(CREATED_AT) from BOB01.BOB_new_table_tracker);

SELECT mv_name into v_Mv_name
FROM BOB01.BOB_new_table_tracker_mv
WHERE
CREATED_AT = (select MAX(CREATED_AT) from BOB01.BOB_new_table_tracker_mv);

select link_name into v_link_name from link_and_mail where mdate = (select max(mdate) from link_and_mail);
select distinct targetschema into v_ts_name from BOB01.MV_BOB_TABLE;

v_sql1 := 'SELECT /*+ monitor parallel (4)*/ a.owner,
                        a.table_name,
                        b.driver_table,
                        b.mandatory_join,
                        sum(c.sum_bytes) TOT_OBJECT_SIZE_MB,
                        (TOT_OBJECT_SIZE_MB) / (:C_TOTAL_ROW_COUNT) AS "EST_ONE_ROW_MB",
                        (EST_ONE_ROW_MB) * (:TOTAL_ROW_COUNT) AS "SPACE_REQUIRED"
                 FROM dba_tables@DB1 a, '|| v_Mv_name ||' b, MV_PRD_SEG_DATA c
                 WHERE a.table_name IN ( SELECT table_name
                                       FROM MV_BOB_TABLE
                                       WHERE driver_table IS NOT NULL
                                             AND   additional_joins IS NULL
                                     )
                 AND   a.owner IN ( SELECT DISTINCT productionschema FROM MV_BOB_TABLE c  )
                 and a.table_name = b.table_name
                 and a.table_name = c.segment_name
                 group by a.owner,a.table_name,b.driver_table,b.mandatory_join
               ORDER BY table_name';

file_handle := utl_file.fopen('ESTIMATES_CSV', v_csv_name||'_EST_PROC.csv', 'w', 32767);

--
UTL_FILE.PUT_LINE(file_handle, ' ');
UTL_FILE.PUT_LINE(file_handle, 'The below report shows total row counts in PROD');
UTL_FILE.PUT_LINE(file_handle, ' for unjoined tables in the BOB document:');
UTL_FILE.PUT_LINE(file_handle, ' ');
utl_file.put_line(file_handle, 'OWNER,TABLE_NAME,MANDATORY_JOIN,TOT_OBJECT_SIZE_MB,EST_ONE_ROW_MB,TOTAL_ROW_COUNT,SPACE_REQUIRED');
--main loop
open cur for v_sql1 using TOTAL_ROW_COUNT,C_TOTAL_ROW_COUNT;
   loop
      fetch cur into OWNER,TABLE_NAME,MANDATORY_JOIN,TOT_OBJECT_SIZE_MB,EST_ONE_ROW_MB,TOTAL_ROW_COUNT,SPACE_REQUIRED;--,EST_ONE_ROW_MB;
      exit when cur%NOTFOUND;
      execute immediate' select /*+parallel (4)*/ count(*) from '||owner||'.'||table_name || '@' || l_dblink into TOTAL_ROW_COUNT;

execute immediate' select /*+monitor parallel (10)*/ count(*) from ' ||owner||'.'||table_name || '@' || l_dblink||' b '||','||
driver_table || '@' || l_dblink||' a ' ||' where ' ||mandatory_join into TOTAL_ROW_COUNT;

execute immediate' select /*+monitor parallel (10)*/ count(*) from ' ||owner||'.'||table_name || '@' || l_dblink into C_TOTAL_ROW_COUNT;

utl_file.put_line(file_handle,
                      OWNER || ',' ||
                      TABLE_NAME || ',' ||
                      TOT_OBJECT_SIZE_MB || ',' ||
                      TOTAL_ROW_COUNT || ',' ||
                      C_TOTAL_ROW_COUNT || ',' || 
                      round(TOT_OBJECT_SIZE_MB / C_TOTAL_ROW_COUNT,7)|| ',' ||
                      round(round(TOT_OBJECT_SIZE_MB / C_TOTAL_ROW_COUNT,7) * round(TOTAL_ROW_COUNT,0),0)
                      );


v_total_driver_only := v_total_driver_only + round(TOT_OBJECT_SIZE_MB / C_TOTAL_ROW_COUNT,7) * round(TOTAL_ROW_COUNT,0);

end loop;

UTL_FILE.PUT_LINE(file_handle, ' ');
utl_file.put_line(file_handle,
                     'Total Estimated Space Required '|| round(v_total_driver_only,0) ||' MB'
                     );

utl_file.fclose(file_handle);

end JUST_ME;

Answer 1

以这种方式使用EST_ONE_ROW_MB 是不可能的，因为它没有被定义为列。 将其替换为(TOT_OBJECT_SIZE_MB) / (:C_TOTAL_ROW_COUNT)

SELECT /*+ monitor parallel (4)*/ a.owner,
                        a.table_name,
                        b.driver_table,
                        b.mandatory_join,
                        sum(c.sum_bytes) TOT_OBJECT_SIZE_MB, -- will be the same problem
                        (sum(c.sum_bytes)) / (:C_TOTAL_ROW_COUNT) AS "EST_ONE_ROW_MB",
                        ((sum(c.sum_bytes)) / (:C_TOTAL_ROW_COUNT)) * (:TOTAL_ROW_COUNT) AS "SPACE_REQUIRED"
...

如果你有一个内联视图，你可以这样做。例如

select EST_ONE_ROW_MB  * (:TOTAL_ROW_COUNT) AS "SPACE_REQUIRED"
from(
  select (TOT_OBJECT_SIZE_MB) / (:C_TOTAL_ROW_COUNT) AS "EST_ONE_ROW_MB"
   from ....
)