以下均摘自网上，收集、记录加深记忆
跟踪数据库的启动过程，我们发现数据库启动的第一个动作就是:
create table bootstrap$ ( line# number not null, obj#
number not null, sql_text varchar2(4000) not null) storage (initial
50K objno 56 extents (file 1 block 377))
这部分代码是写在Oracle应用程序中的。
在内存中创建了bootstrap$以后Oracle就可以从file 1,block 377上读取其他信息，创建重要的数据库对象。从而根据这一部分信息启动数据库，这就实现了数据库的引导，类似于操作系统的初始化。
bootstrap$表的内容：
SQL> select * from bootstrap$ where sql_text like 'CREATE TABLE%' order by line#;
LINE# OBJ# SQL_TEXT
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
4 4 CREATE TABLE TAB$("OBJ#" NUMBER NOT NULL,"DATAOBJ#" NUMBER,"TS#" NUMBER NOT NULL,"FILE#" NUMBER NOT NULL,"BLOCK#" NUMBER NOT NULL,"BOBJ#" NUMBER,"TAB#" NUMBER,"COLS" NUMBER NOT NULL,"CLUCOLS" NUMBER,"PCTFREE$" NUMBER NOT NULL,"PCTUSED$" NUMBER NOT NULL,"INITRANS" NUMBER NOT NULL,"MAXTRANS" NUMBER NOT NULL,"FLAGS" NUMBER NOT NULL,"AUDIT$" VARCHAR2(38) NOT NULL,"ROWCNT" NUMBER,"BLKCNT" NUMBER,"EMPCNT" NUMBER,"AVGSPC" NUMBER,"CHNCNT" NUMBER,"AVGRLN" NUMBER,"AVGSPC_FLB" NUMBER,"FLBCNT" NUMBER,"ANALYZETIME" DATE,"SAMPLESIZE" NUMBER,"DEGREE" NUMBER,"INSTANCES" NUMBER,"INTCOLS" NUMBER NOT NULL,"KERNELCOLS" NUMBER NOT NULL,"PROPERTY" NUMBER NOT NULL,"TRIGFLAG" NUMBER,"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" VARCHAR2(1000),"SPARE5" VARCHAR2(1000),"SPARE6" DATE) STORAGE ( OBJNO 4 TABNO 1) CLUSTER C_OBJ#(OBJ#)
5 5 CREATE TABLE CLU$("OBJ#" NUMBER NOT NULL,"DATAOBJ#" NUMBER,"TS#" NUMBER NOT NULL,"FILE#" NUMBER NOT NULL,"BLOCK#" NUMBER NOT NULL,"COLS" NUMBER NOT NULL,"PCTFREE$" NUMBER NOT NULL,"PCTUSED$" NUMBER NOT NULL,"INITRANS" NUMBER NOT NULL,"MAXTRANS" NUMBER NOT NULL,"SIZE$" NUMBER,"HASHFUNC" VARCHAR2(30),"HASHKEYS" NUMBER,"FUNC" NUMBER,"EXTIND" NUMBER,"FLAGS" NUMBER,"DEGREE" NUMBER,"INSTANCES" NUMBER,"AVGCHN" NUMBER,"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" NUMBER,"SPARE5" VARCHAR2(1000),"SPARE6" VARCHAR2(1000),"SPARE7" DATE) STORAGE ( OBJNO 5 TABNO 2) CLUSTER C_OBJ#(OBJ#)
12 12 CREATE TABLE FET$("TS#" NUMBER NOT NULL,"FILE#" NUMBER NOT NULL,"BLOCK#" NUMBER NOT NULL,"LENGTH" NUMBER NOT NULL) STORAGE ( OBJNO 12 TABNO 1) CLUSTER C_TS#(TS#)
13 13 CREATE TABLE UET$("SEGFILE#" NUMBER NOT NULL,"SEGBLOCK#" NUMBER NOT NULL,"EXT#" NUMBER NOT NULL,"TS#" NUMBER NOT NULL,"FILE#" NUMBER NOT NULL,"BLOCK#" NUMBER NOT NULL,"LENGTH" NUMBER NOT NULL) STORAGE ( OBJNO 13 TABNO 1) CLUSTER C_FILE#_BLOCK#(TS#,SEGFILE#,SEGBLOCK#)
14 14 CREATE TABLE SEG$("FILE#" NUMBER NOT NULL,"BLOCK#" NUMBER NOT NULL,"TYPE#" NUMBER NOT NULL,"TS#" NUMBER NOT NULL,"BLOCKS" NUMBER NOT NULL,"EXTENTS" NUMBER NOT NULL,"INIEXTS" NUMBER NOT NULL,"MINEXTS" NUMBER NOT NULL,"MAXEXTS" NUMBER NOT NULL,"EXTSIZE" NUMBER NOT NULL,"EXTPCT" NUMBER NOT NULL,"USER#" NUMBER NOT NULL,"LISTS" NUMBER,"GROUPS" NUMBER,"BITMAPRANGES" NUMBER NOT NULL,"CACHEHINT" NUMBER NOT NULL,"SCANHINT" NUMBER NOT NULL,"HWMINCR" NUMBER NOT NULL,"SPARE1" NUMBER,"SPARE2" NUMBER) STORAGE ( OBJNO 14 TABNO 2) CLUSTER C_FILE#_BLOCK#(TS#,FILE#,BLOCK#)
15 15 CREATE TABLE UNDO$("US#" NUMBER NOT NULL,"NAME" VARCHAR2(30) NOT NULL,"USER#" NUMBER NOT NULL,"FILE#" NUMBER NOT NULL,"BLOCK#" NUMBER NOT NULL,"SCNBAS" NUMBER,"SCNWRP" NUMBER,"XACTSQN" NUMBER,"UNDOSQN" NUMBER,"INST#" NUMBER,"STATUS$" NUMBER NOT NULL,"TS#" NUMBER,"UGRP#" NUMBER,"KEEP" NUMBER,"OPTIMAL" NUMBER,"FLAGS" NUMBER,"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" VARCHAR2(1000),"SPARE5" VARCHAR2(1000),"SPARE6" DATE) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE ( INITIAL 64K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 OBJNO 15 EXTENTS (FILE 1 BLOCK 105))
16 16 CREATE TABLE TS$("TS#" NUMBER NOT NULL,"NAME" VARCHAR2(30) NOT NULL,"OWNER#" NUMBER NOT NULL,"ONLINE$" NUMBER NOT NULL,"CONTENTS$" NUMBER NOT NULL,"UNDOFILE#" NUMBER,"UNDOBLOCK#" NUMBER,"BLOCKSIZE" NUMBER NOT NULL,"INC#" NUMBER NOT NULL,"SCNWRP" NUMBER,"SCNBAS" NUMBER,"DFLMINEXT" NUMBER NOT NULL,"DFLMAXEXT" NUMBER NOT NULL,"DFLINIT" NUMBER NOT NULL,"DFLINCR" NUMBER NOT NULL,"DFLMINLEN" NUMBER NOT NULL,"DFLEXTPCT" NUMBER NOT NULL,"DFLOGGING" NUMBER NOT NULL,"AFFSTRENGTH" NUMBER NOT NULL,"BITMAPPED" NUMBER NOT NULL,"PLUGGED" NUMBER NOT NULL,"DIRECTALLOWED" NUMBER NOT NULL,"FLAGS" NUMBER NOT NULL,"PITRSCNWRP" NUMBER,"PITRSCNBAS" NUMBER,"OWNERINSTANCE" VARCHAR2(30),"BACKUPOWNER" VARCHAR2(30),"GROUPNAME" VARCHAR2(30),"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" VARCHAR2(1000),"SPARE4" DATE) STORAGE ( OBJNO 16 TABNO 2) CLUSTER C_TS#(TS#)
17 17 CREATE TABLE FILE$("FILE#" NUMBER NOT NULL,"STATUS$" NUMBER NOT NULL,"BLOCKS" NUMBER NOT NULL,"TS#" NUMBER,"RELFILE#" NUMBER,"MAXEXTEND" NUMBER,"INC" NUMBER,"CRSCNWRP" NUMBER,"CRSCNBAS" NUMBER,"OWNERINSTANCE" VARCHAR2(30),"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" VARCHAR2(1000),"SPARE4" DATE) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE ( INITIAL 64K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 OBJNO 17 EXTENTS (FILE 1 BLOCK 113))
18 18 CREATE TABLE OBJ$("OBJ#" NUMBER NOT NULL,"DATAOBJ#" NUMBER,"OWNER#" NUMBER NOT NULL,"NAME" VARCHAR2(30) NOT NULL,"NAMESPACE" NUMBER NOT NULL,"SUBNAME" VARCHAR2(30),"TYPE#" NUMBER NOT NULL,"CTIME" DATE NOT NULL,"MTIME" DATE NOT NULL,"STIME" DATE NOT NULL,"STATUS" NUMBER NOT NULL,"REMOTEOWNER" VARCHAR2(30),"LINKNAME" VARCHAR2(128),"FLAGS" NUMBER,"OID$" RAW(16),"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" VARCHAR2(1000),"SPARE5" VARCHAR2(1000),"SPARE6" DATE) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE ( INITIAL 16K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 OBJNO 18 EXTENTS (FILE 1 BLOCK 121))
19 19 CREATE TABLE IND$("OBJ#" NUMBER NOT NULL,"DATAOBJ#" NUMBER,"TS#" NUMBER NOT NULL,"FILE#" NUMBER NOT NULL,"BLOCK#" NUMBER NOT NULL,"BO#" NUMBER NOT NULL,"INDMETHOD#" NUMBER NOT NULL,"COLS" NUMBER NOT NULL,"PCTFREE$" NUMBER NOT NULL,"INITRANS" NUMBER NOT NULL,"MAXTRANS" NUMBER NOT NULL,"PCTTHRES$" NUMBER,"TYPE#" NUMBER NOT NULL,"FLAGS" NUMBER NOT NULL,"PROPERTY" NUMBER NOT NULL,"BLEVEL" NUMBER,"LEAFCNT" NUMBER,"DISTKEY" NUMBER,"LBLKKEY" NUMBER,"DBLKKEY" NUMBER,"CLUFAC" NUMBER,"ANALYZETIME" DATE,"SAMPLESIZE" NUMBER,"ROWCNT" NUMBER,"INTCOLS" NUMBER NOT NULL,"DEGREE" NUMBER,"INSTANCES" NUMBER,"TRUNCCNT" NUMBER,"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" VARCHAR2(1000),"SPARE5" VARCHAR2(1000),"SPARE6" DATE) STORAGE ( OBJNO 19 TABNO 3) CLUSTER C_OBJ#(BO#)
20 20 CREATE TABLE ICOL$("OBJ#" NUMBER NOT NULL,"BO#" NUMBER NOT NULL,"COL#" NUMBER NOT NULL,"POS#" NUMBER NOT NULL,"SEGCOL#" NUMBER NOT NULL,"SEGCOLLENGTH" NUMBER NOT NULL,"OFFSET" NUMBER NOT NULL,"INTCOL#" NUMBER NOT NULL,"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" VARCHAR2(1000),"SPARE5" VARCHAR2(1000),"SPARE6" DATE) STORAGE ( OBJNO 20 TABNO 4) CLUSTER C_OBJ#(BO#)
21 21 CREATE TABLE COL$("OBJ#" NUMBER NOT NULL,"COL#" NUMBER NOT NULL,"SEGCOL#" NUMBER NOT NULL,"SEGCOLLENGTH" NUMBER NOT NULL,"OFFSET" NUMBER NOT NULL,"NAME" VARCHAR2(30) NOT NULL,"TYPE#" NUMBER NOT NULL,"LENGTH" NUMBER NOT NULL,"FIXEDSTORAGE" NUMBER NOT NULL,"PRECISION#" NUMBER,"SCALE" NUMBER,"NULL$" NUMBER NOT NULL,"DEFLENGTH" NUMBER,"DEFAULT$" LONG,"INTCOL#" NUMBER NOT NULL,"PROPERTY" NUMBER NOT NULL,"CHARSETID" NUMBER,"CHARSETFORM" NUMBER,"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" VARCHAR2(1000),"SPARE5" VARCHAR2(1000),"SPARE6" DATE) STORAGE ( OBJNO 21 TABNO 5) CLUSTER C_OBJ#(OBJ#)
22 22 CREATE TABLE USER$("USER#" NUMBER NOT NULL,"NAME" VARCHAR2(30) NOT NULL,"TYPE#" NUMBER NOT NULL,"PASSWORD" VARCHAR2(30),"DATATS#" NUMBER NOT NULL,"TEMPTS#" NUMBER NOT NULL,"CTIME" DATE NOT NULL,"PTIME" DATE,"EXPTIME" DATE,"LTIME" DATE,"RESOURCE$" NUMBER NOT NULL,"AUDIT$" VARCHAR2(38),"DEFROLE" NUMBER NOT NULL,"DEFGRP#" NUMBER,"DEFGRP_SEQ#" NUMBER,"ASTATUS" NUMBER NOT NULL,"LCOUNT" NUMBER NOT NULL,"DEFSCHCLASS" VARCHAR2(30),"EXT_USERNAME" VARCHAR2(4000),"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" VARCHAR2(1000),"SPARE5" VARCHAR2(1000),"SPARE6" DATE) STORAGE ( OBJNO 22 TABNO 1) CLUSTER C_USER#(USER#)
23 23 CREATE TABLE PROXY_DATA$("CLIENT#" NUMBER NOT NULL,"PROXY#" NUMBER NOT NULL,"CREDENTIAL_TYPE#" NUMBER NOT NULL,"CREDENTIAL_VERSION#" NUMBER NOT NULL,"CREDENTIAL_MINOR#" NUMBER NOT NULL,"FLAGS" NUMBER NOT NULL) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE ( INITIAL 64K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 OBJNO 23 EXTENTS (FILE 1 BLOCK 129))
25 25 CREATE TABLE PROXY_ROLE_DATA$("CLIENT#" NUMBER NOT NULL,"PROXY#" NUMBER NOT NULL,"ROLE#" NUMBER NOT NULL) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE ( INITIAL 64K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 OBJNO 25 EXTENTS (FILE 1 BLOCK 145))
28 28 CREATE TABLE CON$("OWNER#" NUMBER NOT NULL,"NAME" VARCHAR2(30) NOT NULL,"CON#" NUMBER NOT NULL,"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" VARCHAR2(1000),"SPARE5" VARCHAR2(1000),"SPARE6" DATE) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE ( INITIAL 64K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 OBJNO 28 EXTENTS (FILE 1 BLOCK 169))
31 31 CREATE TABLE CDEF$("CON#" NUMBER NOT NULL,"OBJ#" NUMBER NOT NULL,"COLS" NUMBER,"TYPE#" NUMBER NOT NULL,"ROBJ#" NUMBER,"RCON#" NUMBER,"RRULES" VARCHAR2(3),"MATCH#" NUMBER,"REFACT" NUMBER,"ENABLED" NUMBER,"CONDLENGTH" NUMBER,"CONDITION" LONG,"INTCOLS" NUMBER,"MTIME" DATE,"DEFER" NUMBER,"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" VARCHAR2(1000),"SPARE5" VARCHAR2(1000),"SPARE6" DATE) STORAGE ( OBJNO 31 TABNO 1) CLUSTER C_COBJ#(OBJ#)
32 32 CREATE TABLE CCOL$("CON#" NUMBER NOT NULL,"OBJ#" NUMBER NOT NULL,"COL#" NUMBER NOT NULL,"POS#" NUMBER,"INTCOL#" NUMBER NOT NULL,"SPARE1" NUMBER,"SPARE2" NUMBER,"SPARE3" NUMBER,"SPARE4" VARCHAR2(1000),"SPARE5" VARCHAR2(1000),"SPARE6" DATE) STORAGE ( OBJNO 32 TABNO 2) CLUSTER C_COBJ#(OBJ#)
56 56 CREATE TABLE BOOTSTRAP$("LINE#" NUMBER NOT NULL,"OBJ#" NUMBER NOT NULL,"SQL_TEXT" VARCHAR2(4000) NOT NULL) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE ( INITIAL 56K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 OBJNO 56 EXTENTS (FILE 1 BLOCK 377))
19 rows selected.
从以上的bootstrap$表里看到这些内容，不知道line#或obj#是否代表了oracle的启动顺序？
我本人认为：bootstrap$表里line#或obj#代表了oracle的启动顺序，并且这些列出的表全部是oraccle实例必须加载的database相关的基础内存表。同时：oracle的某些基础数据字典表、视图也是oracle程序固化了的，运行catalog.sql只是弄些视图、同义词、进行授权罢了！