sql.bsq與數(shù)據(jù)庫的創(chuàng)建
2024-07-21 02:33:02
供稿：網(wǎng)友
假如我們使用腳本創(chuàng)建數(shù)據(jù)庫，那么最先運行的是一個叫做CreateDB.sql的腳本。
這個腳本發(fā)出CREATE DATABASE的命令,具體類似如下的例子:
CREATE DATABASE eygle
MAXINSTANCES 1
MAXLOGHISTORY 1
MAXLOGFILES 5
MAXLOGMEMBERS 3
MAXDATAFILES 100
DATAFILE '/opt/Oracle/oradata/eygle/system01.dbf'
SIZE 250M REUSE AUTOEXTEND ON NEXT 10240K MAXSIZE UNLIMITED
EXTENT MANAGEMENT LOCAL
DEFAULT TEMPORARY TABLESPACE TEMP TEMPFILE '/opt/oracle/oradata/eygle/temp01.dbf'
SIZE 40M REUSE AUTOEXTEND ON NEXT 640K MAXSIZE UNLIMITED
UNDO TABLESPACE "UNDOTBS1" DATAFILE '/opt/oracle/oradata/eygle/undotbs01.dbf'
SIZE 200M REUSE AUTOEXTEND ON NEXT 5120K MAXSIZE UNLIMITED
CHARACTER SET ZHS16GBK
NATIONAL CHARACTER SET AL16UTF16
LOGFILE GROUP 1 ('/opt/oracle/oradata/eygle/redo01.log') SIZE 10240K,
GROUP 2 ('/opt/oracle/oradata/eygle/redo02.log') SIZE 10240K,
GROUP 3 ('/opt/oracle/oradata/eygle/redo03.log') SIZE 10240K;
exit; 在這個過程中，Oracle會調(diào)用$ORACLE_HOME/rdbms/admin/sql.bsq腳本，用于創(chuàng)建數(shù)據(jù)字典。這個文件的位置受到一個隱含的初始化參數(shù) （_init_sql_file ）的控制: SQL> @GetParDescrb.sql
Enter value for par: init_sql
old 6: AND x.ksppinm LIKE '%&par%'
new 6: AND x.ksppinm LIKE '%init_sql%' NAME VALUE DESCRIB
--------------- --------------------- ------------------------------------------------------------
_init_sql_file ?/rdbms/admin/sql.bsq File containing SQL statements to execute upon database creation 假如在創(chuàng)建過程中，Oracle無法找到sql.bsq文件，則數(shù)據(jù)庫創(chuàng)建將會出錯.
假如我們移除sql.bsq文件，再看這樣一個數(shù)據(jù)庫創(chuàng)建過程: [oracle@jumper scripts]$ sqlplus "/ as sysdba"SQL*Plus: Release 9.2.0.4.0 - PRodUCtion on Fri Aug 18 15:45:26 2006Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.Connected to an idle instance.SQL> startup nomount;
ORACLE instance started.Total System Global Area 252777592 bytes
Fixed Size 451704 bytes
Variable Size 134217728 bytes
Database Buffers 117440512 bytes
Redo Buffers 667648 bytes
SQL> @CreateDB.sql
CREATE DATABASE eygle
*
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning option
JServer Release 9.2.0.4.0 - Production 此時日志中會記錄: Fri Aug 18 15:45:49 2006
Errors in file /opt/oracle/admin/eygle/udump/eygle_ora_3632.trc:
ORA-01501: CREATE DATABASE failed
ORA-01526: error in opening file '?/rdbms/admin/sql.bsq'
ORA-07391: sftopn: fopen error, unable to open text file.
Error 1526 happened during db open, shutting down database
USER: terminating instance due to error 1526
Fri Aug 18 15:45:49 2006
Errors in file /opt/oracle/admin/eygle/bdump/eygle_ckpt_3623.trc:
ORA-01526: error in opening file ''
Instance terminated by USER, pid = 3632
ORA-1092 signalled during: CREATE DATABASE eygle
MAXINSTANCES 1
MAXLOGHISTORY... 這就是sql.bsq文件在數(shù)據(jù)庫創(chuàng)建過程中的作用。知道了這個內(nèi)容之后，我們可以通過手工修改sql.bsq文件來更改數(shù)據(jù)庫字典對象參數(shù)，從而實現(xiàn)非凡要求數(shù)據(jù)庫的創(chuàng)建或測試自定義庫。我們也可以通過修改_init_sql_file參數(shù)來重定位sql.bsq文件的位置。
