環境:HP-UX 11.x的C++(PROC & ACC編譯器)的Oracle 10g)不能從嵌入式SQL執行SELECT MAX(ORA_ROWSCN)
我無法從我的C++嵌入式SQL代碼
執行以下命令EXEC SQL SELECT MAX(ORA_ROWSCN) INTO :scn_timestamp
FROM table_name ;
我所做的更改是對現有文件。顯示以下是摘錄從自動生成腳本編譯器錯誤:
/data/tsd_oracle/hpux/10.2.0.2/bin/proc +z ireclen=200 ORECLEN=200 LRECLEN=208 code=cpp cpp_suffix=C lines=yes sqlcheck=semantics maxopencursors=10 parse=PARTIAL unsafe_null=yes mode=oracle dbms=V8 sys_include='(/opt/aCC,/opt/aCC/include/iostream,/opt/aCC/include/rw,/usr/include)' include=/data/tsd_oracle/hpux/10.2.0.2/precomp/public include=/usr/include include=/opt/aCC/include include=/opt/aCC/include/SC iname=FILENAME.PC;
Pro*C/C++: Release 10.2.0.2.0 - Production on Fri Feb 15 12:48:35 2013
Copyright (c) 1982, 2005, Oracle. All rights reserved.
System default option values taken from: /data/tsd_oracle/hpux/10.2.0.2/precomp/admin/pcscfg.cfg
Error at line 81, column 5 in file FILENAME.PC
EXEC SQL SELECT MAX(ora_rowscn) INTO :scn_timestamp
....1
PLS-S-00201, identifier 'ORA_ROWSCN' must be declared
Error at line 81, column 5 in file FILENAME.PC
EXEC SQL SELECT MAX(ora_rowscn) INTO :scn_timestamp
....1
PLS-S-00000, SQL Statement ignored
Semantic error at line 81, column 5, file FILENAME.PC:
EXEC SQL SELECT MAX(ora_rowscn) INTO :scn_timestamp
....1
PCC-S-02346, PL/SQL found semantic errors
*** Error code 1
clearmake: Error: Build script failed for "FILENAME.C"
默認選項值文件/data/tsd_oracle/hpux/10.2.0.2/precomp/admin/pcscfg.cfg的內容如下
sys_include=(/data/tsd_oracle/hpux/10.2.0.2/precomp/public,/usr/include)
ltype=short
define=ORASTDARG
我也試過這個命令的變體,如
EXEC SQL SELECT MAX(A.ORA_ROWSCN) INTO :scn_timestamp
FROM table_name A;
爲此,我得到錯誤說ORA_ROWSCN列不存在。
我已驗證此SQL查詢在SQLPlus控制檯中的工作。嵌入時無法正常工作的特定原因?
---------------------------解決方法------------------ -------------
基於Dominic的建議,我是能夠成功地恢復使用以下
EXEC SQL PREPARE timestamp_stmt FROM 'SELECT MAX(A.ora_rowscn) FROM table_name A';
EXEC SQL DECLARE timestamp_cur CURSOR FOR timestamp_stmt;
EXEC SQL OPEN timestamp_cur;
EXEC SQL FETCH timestamp_cur INTO :scn_timestamp;
EXEC SQL CLOSE timestamp_cur;
我很高興這種解決方法我想要的,但我仍然想知道爲什麼它不能以通常的方式工作。我也嘗試過使用遊標,並且有相同的錯誤,說明「標識符'ORA_ROWSCN'必須聲明」。
不管怎麼說,感謝多米尼克
你嘗試過它包裹在一個動態的SQL塊從PRO * C編譯器隱藏起來,看看是否能工作?'即使用的東西
即像'EXEC SQL PREPARE sql_stmt FROM:select_stmt;'其中'select_stmt'是你的'char'數組,包含'select max_name(a.ora_rowscn)from table_name a'? – 2013-02-15 08:13:00
謝謝多米尼克,那個建議很好用 – user2074402 2013-02-15 10:40:06
啊。我已將其設置爲答案,以便您可以接受它 – 2013-02-16 08:45:15