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Fy_Recover_Data ———— 用于数据恢复的PLSQL包

作者: 初见博客 分类: oracle备份 发布时间: 2022-09-29 01:46

create or replace package FY_Recover_Data is
—————————————————————————
— WWW.HelloDBA.COM —
— Created By: Fuyuncat —
— Created Date: 08/08/2012 —
— Email: Fuyuncat@gmail.com —
— Copyright (c), 2014, WWW.HelloDBA.COM All rights reserved. —
— Latest Version: http://www.HelloDBA.com/download/FY_Recover_Data.zip —
— —
— Update Logs —
— 15/08/2012, Fuyuncat: —
— 1. Fixed Bug in Clean_Up_Ts (Not change TS status correctly) —
— 2. Added Exception Handle when Restore Data —
— 3. Added Parameter in recover_table, —
— to balance Fault Tolerance and Performance —
— —
— 16/08/2012, Fuyuncat: —
— 1. Enhanced corrupted block processing, get rows as possilbe —
— —
— 17/08/2012, Fuyuncat: —
— 1. Omit the LOB columns raised ORA-22922 exception —
— —
— 20/08/2012, Fuyuncat: —
— 1. Omit the LOB columns via db link —
— —
— 22/08/2012, Fuyuncat: —
— 1. Updated logging and tracing interface —
— —
— 19/02/2014, Fuyuncat: —
— 1. Temp Restore and Recover tablespace & files —
— will be created on temp folder —
— 2. Handle tablespace has files located at diff folders —
— 3. Handle tables on ASM —
— —
— 05/03/2014, Fuyuncat: —
— 1. Fixed bugs —
— 2. Use existing dirctory if applicable —
— 3. Recover data from offline files —
—————————————————————————

type r_cursor is REF CURSOR;
type o_fileprop is record (
file# number,
status$ number);
type t_fileprops is table of o_fileprop;

/************************************************************************
** recover truncated table
**
** tgtowner: Owner of Target Table to be recovered;
** tgttable: Name of Target Table to be recovered;
** datapath: Absolute path of Data Files;
** fbks: block number to be filled in recovery table;
** offline_files: Offline data files that data should be recovered from;
** foramt: full_path_file1;full_path_file2…;
************************************************************************/
procedure recover_truncated_table( tow varchar2,
ttb varchar2,
fbks number default 1,
tmppath varchar2 default null,
offline_files varchar2 default null);

/************************************************************************
** dump a block in raw, for testing
**
** hdfile: Data file name;
** srcdir: data file directory
** blknb: block number to be dumped;
** blksz: block size;
************************************************************************/
procedure dump_seg_block_raw( hdfile varchar2,
srcdir varchar2,
blknb number,
blksz number default 8192);
/*
procedure test_chain(filename varchar2,
blknum number,
startpos number,
repcont raw,
srcdir varchar2 default ‘FY_DATA_DIR’);
*/
/************************************************************************
** Set Initial parameters
**
** tracing: trace the process for debug;
** logging: show logging information;
** repobjid: replace the data object id wiht the recover table data object id;
************************************************************************/
procedure init_set( tracing boolean default true,
logging boolean default true,
repobjid boolean default true);
end FY_Recover_Data;
/
create or replace package body FY_Recover_Data is
—————————————————————————
— WWW.HelloDBA.COM —
— Created By: Fuyuncat —
— Created Date: 08/08/2012 —
— Email: Fuyuncat@gmail.com —
— Copyright (c), 2014, WWW.HelloDBA.COM All rights reserved. —
— Latest Version: http://www.HelloDBA.com/download/FY_Recover_Data.zip —
—————————————————————————

s_tracing boolean:= false;
s_logging boolean:= true;
s_repobjid boolean:= false;

procedure init_set (tracing boolean default true,
logging boolean default true,
repobjid boolean default true)
as
begin
s_tracing := tracing;
s_logging := logging;
s_repobjid := repobjid;
end;

procedure trace (msg varchar2)
as
begin
if s_tracing then
dbms_output.put_line(to_char(sysdate, ‘HH24:MI:SS’)||’: ‘||msg);
end if;
end;

procedure log (msg varchar2)
as
begin
if s_logging then
dbms_output.put_line(to_char(sysdate, ‘HH24:MI:SS’)||’: ‘||msg);
end if;
end;

function d2r (dig varchar2,
len number default 0)
return raw
is
begin
–trace(‘[d2r] hextoraw(lpad(trim(to_char(‘||dig||’, ”XXXXXXXX”)),’||len||’,”0”))’);
return hextoraw(lpad(trim(to_char(dig, ‘XXXXXXXX’)),len,’0′));
end;

/************************************************************************
** Copy file
**
** srcdir: Directory of Source File;
** srcfile: Source File Name;
** dstdir: Directory of Destination File;
** dstfile: Destination File Name;
************************************************************************/
procedure copy_file(srcdir varchar2,
srcfile varchar2,
dstdir varchar2,
dstfile in out varchar2)
as
–p_srcdir varchar2(255) := upper(srcdir);
–p_srcfile varchar2(255) := upper(srcfile);
–p_dstdir varchar2(255) := upper(dstdir);
–p_dstfile varchar2(255) := upper(dstfile);
p_srcdir varchar2(255) := srcdir;
p_srcfile varchar2(255) := srcfile;
p_dstdir varchar2(255) := dstdir;
p_dstfile varchar2(255) := dstfile;
file_copied boolean := false;
retries pls_integer := 0;
begin
if dstdir is null then
p_dstdir := p_srcdir;
end if;
if dstfile is null then
p_dstfile := p_srcfile||’$’;
dstfile := p_dstfile;
end if;
while not file_copied loop
begin
trace(‘[copy_file] begin copy file: ‘||p_srcdir||’\’||p_srcfile||’ => ‘||p_dstdir||’\’||p_dstfile);–‘
DBMS_FILE_TRANSFER.copy_file(p_srcdir, p_srcfile, p_dstdir, p_dstfile);
trace(‘[copy_file] completed.’);
file_copied := true;
exception when others then
— file already exists
if sqlcode = -19504 and instr(dbms_utility.format_error_stack,’ORA-27038′)>0 and retries < 10 then
trace(‘[copy_file] file ‘||p_dstdir||’\’||p_dstfile||’ exists, rename to ‘||dstfile||retries);
retries := retries+1;
p_dstfile := dstfile||retries;
file_copied := false;
else
–log(dbms_utility.format_error_backtrace);
file_copied := true;
raise;
end if;
end;
end loop;
dstfile := p_dstfile;
end;

/************************************************************************
** Remove file
**
** dir: Directory of the File;
** file: File to be removed;
************************************************************************/
procedure remove_file(dir varchar2,
file varchar2)
as
begin
trace(‘[remove_file] Begin to remove file ‘||dir||’/’||file);
utl_file.fremove(dir,file);
trace(‘[remove_file] ‘||dir||’/’||file||’ has been removed.’);
end;

function gen_table_name(tgttable varchar2,
plus varchar2 default ”,
genowner varchar2 default user)
return varchar2
as
gentab varchar2(30);
begin
select upper(tgttable||plus||surfix) into gentab from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_tables where owner = genowner and table_name = upper(tgttable||plus||surfix)) order by surfix nulls first) where rownum<=1;
return gentab;
end;

function gen_file_name( tgtfile varchar2,
plus varchar2 default ”)
return varchar2
as
genfile varchar2(30);
slash char(1);
begin
select decode(instr(platform_name, ‘Windows’),0,’/’,’\’) into slash from v_$database where rownum<=1;
select tgtfile||plus||surfix||’.DAT’ into genfile from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_data_files where file_name like ‘%’||slash||tgtfile||plus||surfix||’.DAT’) order by surfix nulls first) where rownum<=1; –‘
return genfile;
end;

function gen_ts_name( tgtts varchar2,
plus varchar2 default ”)
return varchar2
as
gents varchar2(30);
begin
select tgtts||plus||surfix into gents from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_tablespaces where tablespace_name = tgtts||plus||surfix) order by surfix nulls first) where rownum<=1;
return gents;
end;

procedure create_directory (path varchar2,
dir in out varchar2)
as
exists_path pls_integer;
exists_dir varchar2(256);
slash char(1);
begin
select decode(instr(platform_name, ‘Windows’),0,’/’,’\’) into slash from v_$database where rownum<=1;
— windows
if slash=’\’ then
select count(1), max(directory_name) into exists_path, exists_dir from dba_directories
where owner=user
and upper(directory_path)||decode(substr(directory_path,length(directory_path)),slash,”,slash)
=
upper(path)||decode(substr(path,length(path)),slash,”,slash);
else — linux/unix
select count(1), max(directory_name) into exists_path, exists_dir from dba_directories
where owner=user
and directory_path||decode(substr(directory_path,length(directory_path)),slash,”,slash)
=
path||decode(substr(path,length(path)),slash,”,slash);
end if;
trace(‘[create_directory] Exists directory number ‘||exists_path);
if exists_path=0 then
select dir||surfix into dir from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_directories where directory_name = dir||surfix) order by surfix nulls first) where rownum<=1;
log(‘New Directory Name: ‘||dir);
execute immediate ‘create directory ‘||dir||’ as ”’||path||””;
else
dir := exists_dir;
log(‘Use existing Directory Name: ‘||dir);
end if;
end;

procedure replace_segmeta_in_file(tmpdir varchar2,
tmpcopyf varchar2,
dstdir varchar2,
dstfile in out varchar2,
dstisfilesystem boolean,
tgtobjid number,
newobjid number,
dtail raw,
addpos number,
addinfo raw,
blksz number default 8192,
endianess number default 1)
as
bfr utl_file.file_type;
bfw utl_file.file_type;
hsz number := 24;
objr raw(4);
objn number;
dhead raw(32);
dbody raw(32767);
nbody raw(32767);
p_tmpdir varchar2(255) := tmpdir;
p_tmpcopyf varchar2(255) := tmpcopyf;
p_dstdir varchar2(255) := dstdir;
p_tmpdstfile varchar2(255);
p_finaldstdir varchar2(255);
begin
if p_dstdir is null then
p_dstdir := p_tmpdir;
end if;
trace(‘[replace_objid_in_file] replace object id in ‘||tmpdir||’\’||tmpcopyf||’ [‘||tgtobjid||’ => ‘||newobjid||’]’); –‘
if not dstisfilesystem then
p_tmpdstfile := gen_file_name(dstfile,”);
copy_file(dstdir,dstfile,p_tmpdir,p_tmpdstfile);
p_finaldstdir := p_tmpdir;
else
p_tmpdstfile := dstfile;
p_finaldstdir := p_dstdir;
end if;
bfr := utl_file.fopen(p_tmpdir, p_tmpcopyf, ‘RB’);
bfw := utl_file.fopen(p_finaldstdir, p_tmpdstfile, ‘WB’);
while true loop
begin
nbody := ”;
utl_file.get_raw(bfr, dhead, hsz);
exit when dhead is null;
utl_file.get_raw(bfr, dbody, blksz-hsz);
–objr := hextoraw(substrb(rawtohex(dbody), 1, 8));
objr := utl_raw.substr(dbody, 1, 4);
if endianess > 0 then
objn := to_number(rawtohex(utl_raw.reverse(objr)), ‘XXXXXXXX’);
else
objn := to_number(rawtohex(objr), ‘XXXXXXXX’);
end if;
— replace data object id with the recover object id
–if objn = tgtobjid and substrb(rawtohex(dhead), 1, 2) = ’06’ then
if objn = tgtobjid then
if addpos <= hsz then
–utl_file.put_raw(bfw, utl_raw.concat(utl_raw.substr(dhead, 1, addpos-1), addinfo, utl_raw.substr(dhead, addpos+utl_raw.length(addinfo))));
nbody := utl_raw.concat(nbody, utl_raw.substr(dhead, 1, addpos-1), addinfo, utl_raw.substr(dhead, addpos+utl_raw.length(addinfo)));
else
–utl_file.put_raw(bfw, dhead);
nbody := utl_raw.concat(nbody, dhead);
end if;
–utl_file.put_raw(bfw, utl_raw.concat(utl_raw.substr(dhead, 1, 8), addinfo, utl_raw.substr(dhead, 9+utl_raw.length(addinfo))));
–nbody := utl_raw.concat(nbody, utl_raw.substr(dhead, 1, 8), addinfo, utl_raw.substr(dhead, 9+utl_raw.length(addinfo)));
–trace(‘[replace_objid_in_file] old id in raw: ‘||rawtohex(objr));
if endianess > 0 then
–trace(‘[replace_objid_in_file] new id in raw: ‘||utl_raw.reverse(d2r(newobjid, 8)));
–utl_file.put_raw(bfw, utl_raw.reverse(d2r(newobjid, 8)));
nbody := utl_raw.concat(nbody, utl_raw.reverse(d2r(newobjid, 8)));
else
–trace(‘[replace_objid_in_file] new id in raw: ‘||(d2r(newobjid, 8)));
–utl_file.put_raw(bfw, d2r(newobjid, 8));
nbody := utl_raw.concat(nbody, d2r(newobjid, 8));
end if;
— skip objid
if addpos > hsz+5 and addinfo is not null then
trace(‘[replace_objid_in_file] old body len: ‘||utl_raw.length(dbody)||’ new = 4 + ‘||utl_raw.length(utl_raw.substr(dbody, 5, addpos-hsz-5))||’ + ‘||utl_raw.length(addinfo)||’ + ‘||utl_raw.length(utl_raw.substr(dbody, addpos-hsz-4+utl_raw.length(addinfo), blksz-(addpos-1)-utl_raw.length(dtail)-utl_raw.length(addinfo)))||’ + 4′);
–utl_file.put_raw(bfw, utl_raw.concat(utl_raw.substr(dbody, 5, addpos-hsz-5), addinfo, utl_raw.substr(dbody, addpos-hsz, blksz-(addpos-1)-utl_raw.length(dtail)-utl_raw.length(addinfo))));
nbody := utl_raw.concat(nbody, utl_raw.substr(dbody, 5, addpos-hsz-5), addinfo, utl_raw.substr(dbody, addpos-hsz-4+utl_raw.length(addinfo), blksz-(addpos-1)-utl_raw.length(dtail)-utl_raw.length(addinfo)));
–trace(‘[replace_objid_in_file] new body len: ‘||utl_raw.length(nbody));
elsif addpos = hsz+5 and addinfo is not null then
–utl_file.put_raw(bfw, utl_raw.concat(addinfo, utl_raw.substr(dbody, addpos-hsz, blksz-(addpos-1)-utl_raw.length(dtail)-utl_raw.length(addinfo))));
nbody := utl_raw.concat(nbody, addinfo, utl_raw.substr(dbody, addpos-hsz, blksz-(addpos-1)-utl_raw.length(dtail)-utl_raw.length(addinfo)));
else
–utl_file.put_raw(bfw, utl_raw.substr(dbody, 5, blksz-hsz-4-utl_raw.length(dtail)));
nbody := utl_raw.concat(nbody, utl_raw.substr(dbody, 5, blksz-hsz-4-utl_raw.length(dtail)));
end if;
–trace(‘[replace_objid_in_file] tail in raw: ‘||dtail||'(‘||utl_raw.length(dtail)||’)’);
–utl_file.put_raw(bfw, dtail);
nbody := utl_raw.concat(nbody, dtail);
trace(‘[replace_objid_in_file] new body length: ‘||utl_raw.length(nbody));
else
–utl_file.put_raw(bfw, dhead);
–utl_file.put_raw(bfw, dbody);
nbody := utl_raw.concat(nbody, dhead, dbody);
end if;
–if utl_raw.length(nbody) != blksz then
— trace(‘[replace_objid_in_file] new body length: ‘||utl_raw.length(nbody));
–end if;
utl_file.put_raw(bfw, nbody);

utl_file.fflush(bfw);
exception
when no_data_found then
exit;
when others then
trace(‘[replace_objid_in_file] ‘||SQLERRM);
trace(‘[replace_objid_in_file] ‘||dbms_utility.format_error_backtrace);
exit;
end;
end loop;
utl_file.fclose(bfw);
utl_file.fclose(bfr);
if not dstisfilesystem then
copy_file(p_tmpdir,p_tmpdstfile,dstdir,dstfile);
remove_file(p_tmpdir,p_tmpdstfile);
end if;
trace(‘[replace_objid_in_file] completed.’);
end;

function get_cols_no_lob( recowner varchar2,
rectab varchar2)
return varchar2
as
cols varchar2(32767);
colno number := 0;
begin
cols := ”;
for col_rec in (select column_name, data_type, nullable from dba_tab_cols where owner = recowner and table_name = rectab) loop
if col_rec.data_type NOT LIKE ‘%LOB’ then
if colno > 0 then
cols := cols||’,’;
end if;
cols := cols||col_rec.column_name;
colno := colno + 1;
end if;
end loop;
return cols;
end;

function restore_table_row_no_lob(recowner varchar2,
rectab varchar2,
rstowner varchar2,
rsttab varchar2,
cols varchar2,
rid rowid)
return number
as
recnum number := 0;
begin
begin
execute immediate ‘insert /*+*/ into ‘||rstowner||’.’||rsttab||'(‘||cols||’) select ‘||cols||’ from ‘||recowner||’.’||rectab||’ where rowid = :rid’ using rid;
recnum := recnum + SQL%ROWCOUNT;
exception when others then
trace(‘[restore_table_row_no_lob] ‘||SQLERRM);
trace(‘[restore_table_row_no_lob] ‘||dbms_utility.format_error_backtrace);
null;
end;
return recnum;
end;

function restore_table_in_rows( recowner varchar2,
rectab varchar2,
rstowner varchar2,
rsttab varchar2)
return number
as
recnum number := 0;
blk_cur r_cursor;
objid number;
fid number;
blkno number;
rnum number;
gnum number;
cols varchar2(32767);
begin
begin
–trace(‘[restore_table_in_rows] ‘||’select dbms_rowid.rowid_object(rowid) objid, dbms_rowid.rowid_relative_fno(rowid) fid, dbms_rowid.rowid_block_number(rowid) blkno, count(1) rnum from ‘||recowner||’.’||rectab||’ group by dbms_rowid.rowid_object(rowid), dbms_rowid.rowid_relative_fno(rowid), dbms_rowid.rowid_block_number(rowid)’);
open blk_cur for ‘select dbms_rowid.rowid_object(rowid) objid, dbms_rowid.rowid_relative_fno(rowid) fid, dbms_rowid.rowid_block_number(rowid) blkno, count(1) rnum from ‘||recowner||’.’||rectab||’ group by dbms_rowid.rowid_object(rowid), dbms_rowid.rowid_relative_fno(rowid), dbms_rowid.rowid_block_number(rowid)’;
loop
fetch blk_cur into objid, fid, blkno, rnum;
exit when blk_cur%NOTFOUND;
trace(‘[restore_table_in_rows] expected rows: ‘||rnum);
gnum := 0;
–trace(‘[restore_table_in_rows] block: ‘||blkno);
for i in 1..rnum loop
begin
–trace(‘[restore_table_in_rows] row: ‘||i);
–execute immediate ‘insert /*+*/into ‘||rstowner||’.’||rsttab||’ select * from ‘||recowner||’.’||rectab||’ where rowid = dbms_rowid.rowid_create(1, :objid, :fid, :blkno, :i)’ using objid, fid, blkno, i-1;
execute immediate ‘insert /*+*/into ‘||rstowner||’.’||rsttab||’ select * from ‘||recowner||’.’||rectab||’ where dbms_rowid.rowid_relative_fno(ROWID)=:fid and dbms_rowid.rowid_block_number(ROWID)=:blkno and dbms_rowid.rowid_row_number(ROWID)=:i’ using fid, blkno, i-1;
recnum := recnum + SQL%ROWCOUNT;
gnum := gnum + SQL%ROWCOUNT;
exception when others then
if sqlcode = -22922 then
— trace(‘[restore_table_in_rows] Warning: Unrecoverable Lob found!’);
if cols is null then
cols := get_cols_no_lob(recowner, rectab);
end if;
recnum := recnum + restore_table_row_no_lob(recowner, rectab, rstowner, rsttab, cols, dbms_rowid.rowid_create(1, objid, fid, blkno, i-1));
else
trace(‘[restore_table_in_rows] ‘||SQLERRM);
trace(‘[restore_table_in_rows] ‘||dbms_utility.format_error_backtrace);
end if;
null;
end;
end loop;
if gnum != rnum then
log(‘Warning: ‘||(rnum-gnum)||’ records lost!’);
end if;
end loop;
exception when others then
trace(‘[restore_table_in_rows] ‘||sqlerrm);
trace(‘[restore_table_in_rows] ‘||dbms_utility.format_error_backtrace);
null;
end;
return recnum;
end;

function restore_table_in_rows_remote(recowner varchar2,
rectab varchar2,
rstowner varchar2,
rsttab varchar2,
dblink varchar2)
return number
as
recnum number := 0;
blk_cur r_cursor;
objid number;
fid number;
blkno number;
rnum number;
cols varchar2(32767);
begin
begin
–rollback;
open blk_cur for ‘select dbms_rowid.rowid_object(rowid) objid, dbms_rowid.rowid_relative_fno(rowid) fid, dbms_rowid.rowid_block_number(rowid) blkno, count(1) rnum from ‘||recowner||’.’||rectab||’ group by dbms_rowid.rowid_object(rowid), dbms_rowid.rowid_relative_fno(rowid), dbms_rowid.rowid_block_number(rowid)’;
loop
fetch blk_cur into objid, fid, blkno, rnum;
exit when blk_cur%NOTFOUND;
trace(‘[restore_table_in_rows_remote] expected rows: ‘||rnum);
for i in 1..rnum loop
begin
–execute immediate ‘insert /*+no_append*/into ‘||rstowner||’.’||rsttab||’ select * from ‘||recowner||’.’||rectab||’@’||dblink||’ where rowid = dbms_rowid.rowid_create(1, :objid, :fid, :blkno, :i)’ using objid, fid, blkno, i-1;
execute immediate ‘insert /*+*/into ‘||rstowner||’.’||rsttab||’ select * from ‘||recowner||’.’||rectab||’@’||dblink||’ where dbms_rowid.rowid_relative_fno(ROWID)=:fid and dbms_rowid.rowid_block_number(ROWID)=:blkno and dbms_rowid.rowid_row_number(ROWID)=:i’ using fid, blkno, i-1;
recnum := recnum + SQL%ROWCOUNT;
–commit;
exception when others then
if sqlcode = -22922 then
if cols is null then
cols := get_cols_no_lob(recowner, rectab);
end if;
recnum := recnum + restore_table_row_no_lob(recowner, rectab, rstowner, rsttab, cols, dbms_rowid.rowid_create(1, objid, fid, blkno, i-1));
else
trace(‘[restore_table_in_rows_remote] ‘||SQLERRM);
trace(‘[restore_table_in_rows_remote] ‘||dbms_utility.format_error_backtrace);
–commit;
end if;
null;
end;
end loop;
end loop;
end;
return recnum;
end;

function restore_table_ctas(recowner varchar2,
rectab varchar2,
rstowner varchar2,
rsttab varchar2)
return number
as
recnum number := 0;
tmptab varchar2(30);
begin
tmptab := gen_table_name(rsttab, ”, rstowner);
begin
execute immediate ‘create table ‘||rstowner||’.’||tmptab||’ as select /*+full(t)*/* from ‘||recowner||’.’||rectab||’ t’;
execute immediate ‘insert /*+append*/ into ‘||rstowner||’.’||rsttab||’ select /*+full(t)*/* from ‘||recowner||’.’||tmptab||’ t’;
recnum := SQL%ROWCOUNT;
execute immediate ‘drop table ‘||rstowner||’.’||tmptab;
exception when others then
–trace(‘[restore_table_ctas] ‘||SQLERRM);
–trace(‘[restore_table_ctas] ‘||dbms_utility.format_error_backtrace);
null;
end;
return recnum;
end;

function restore_table_no_lob(recowner varchar2,
rectab varchar2,
rstowner varchar2,
rsttab varchar2)
return number
as
recnum number := 0;
cols varchar2(32767);
begin
cols := get_cols_no_lob(recowner, rectab);

begin
–execute immediate ‘alter system flush buffer_cache’;
execute immediate ‘insert /*+append*/ into ‘||rstowner||’.’||rsttab||'(‘||cols||’) select /*+full(t)*/’||cols||’ from ‘||recowner||’.’||rectab||’ t’;

recnum := recnum + SQL%ROWCOUNT;
exception when others then
–raise;
if sqlcode = -22922 then
null;
else
recnum := recnum + restore_table_in_rows(recowner, rectab, rstowner, rsttab);
end if;
end;
trace(‘[restore_table_no_lob] ‘||recnum||’ records recovered’);
return recnum;
end;

function restore_table( recowner varchar2,
rectab varchar2,
rstowner varchar2,
rsttab varchar2,
selflink varchar2 default ”)
return number
as
recnum number := 0;
expnum number := 0;
begin
begin
trace(‘[restore_table] Trying to restore data to ‘||rstowner||’.’||rsttab);
execute immediate ‘alter system flush buffer_cache’;
if s_tracing then
execute immediate ‘select /*+full(t)*/count(*) from ‘||recowner||’.’||rectab||’ t’ into expnum;
trace(‘[restore_table] Expected Records in this round: ‘||expnum);
end if;
execute immediate ‘insert /*+append*/ into ‘||rstowner||’.’||rsttab||’ select /*+full(t)*/* from ‘||recowner||’.’||rectab||’ t’;

recnum := recnum + SQL%ROWCOUNT;
if s_tracing and expnum != SQL%ROWCOUNT then
trace(‘[restore_table] ‘||(expnum-SQL%ROWCOUNT)||’ records lost!’);
return -1; — for test
end if;
exception when others then
–raise;
if sqlcode = -22922 then
log(‘Warning: Unrecoverable Lob found!’);
recnum := recnum + restore_table_in_rows_remote(recowner, rectab, rstowner, rsttab, selflink);
–recnum := recnum + restore_table_no_lob(recowner, rectab, rstowner, rsttab);
else
trace(SQLERRM);
trace(‘[restore_table] ‘||dbms_utility.format_error_backtrace);
–recnum := recnum + restore_table_in_rows_remote(recowner, rectab, rstowner, rsttab, selflink);
–return -1; — test
recnum := recnum + restore_table_in_rows(recowner, rectab, rstowner, rsttab);
end if;
end;
execute immediate ‘alter system flush buffer_cache’;
trace(‘[restore_table] ‘||recnum||’ records recovered’);
return recnum;
end;

procedure get_seg_meta( segowner varchar2,
segname varchar2,
tmpdir varchar2,
dtail out raw,
addinfo out raw,
blksz number default 8192)
as
frw raw(32767);
firstblk number;
slash char(1);
hdfile varchar2(255);
hdfpath varchar2(4000);
hdfdir varchar2(255) := ‘TMP_HF_DIR’;
finaldir varchar2(255);
bfo utl_file.file_type;
i number := 0;
begin
select decode(instr(platform_name, ‘Windows’),0,’/’,’\’) into slash from v_$database where rownum<=1;
select header_block+1 into firstblk from dba_segments where owner = segowner and segment_name = segname;
select substr(file_name,instr(d.file_name, slash, -1)+1),
substr(file_name,1,instr(d.file_name, slash, -1))
into hdfile, hdfpath
from dba_data_files d, dba_segments s where s.header_file = d.file_id and s.owner = segowner and s.segment_name = segname; –‘

trace(‘[get_seg_meta] ‘||hdfpath||hdfile);
create_directory(hdfpath,hdfdir);
— copy ASM file to temp os folder
if hdfpath like ‘+%’ or hdfpath like ‘/dev/%’ then
copy_file(hdfdir,hdfile,tmpdir,hdfile);
finaldir := tmpdir;
else
finaldir := hdfdir;
end if;

bfo := utl_file.fopen(finaldir, hdfile, ‘RB’);

— reach to the truncated data blocks
i := 0;
while true loop
begin
utl_file.get_raw(bfo, frw, blksz);
i := i+1;

exit when i = firstblk;
exception when others then
exit;
end;
end loop;

utl_file.get_raw(bfo, frw, blksz);

dtail := utl_raw.substr(frw, blksz-3, 4);
addinfo := utl_raw.substr(frw, 39, 2);

utl_file.fclose(bfo);

if hdfpath like ‘+%’ or hdfpath like ‘/dev/%’ then
remove_file(tmpdir,hdfile);
end if;
— execute immediate ‘drop directory ‘||hdfdir;
end;

function get_seg_data_id( segowner varchar2,
segname varchar2,
tmpdir varchar2,
blksz number default 8192,
endianess number default 1)
return number
as
frw raw(32767);
hsz number := 28;
firstblk number;
slash char(1);
hdfile varchar2(255);
hdfpath varchar2(4000);
hdfdir varchar2(255) := ‘TMP_HF_DIR’;
finaldir varchar2(255);
bfo utl_file.file_type;
i number := 0;
objr raw(4);
objn number;
begin
select decode(instr(platform_name, ‘Windows’),0,’/’,’\’) into slash from v_$database where rownum<=1;
select header_block+1 into firstblk from dba_segments where owner = segowner and segment_name = segname;
select substr(file_name,instr(d.file_name, slash, -1)+1),
substr(file_name,1,instr(d.file_name, slash, -1))
into hdfile, hdfpath
from dba_data_files d, dba_segments s where s.header_file = d.file_id and s.owner = segowner and s.segment_name = segname; –‘

trace(‘[get_seg_data_id] ‘||hdfpath||hdfile);
create_directory(hdfpath,hdfdir);
— copy ASM file to temp os folder
if hdfpath like ‘+%’ or hdfpath like ‘/dev/%’ then
copy_file(hdfdir,hdfile,tmpdir,hdfile);
finaldir := tmpdir;
else
finaldir := hdfdir;
end if;

bfo := utl_file.fopen(finaldir, hdfile, ‘RB’);

— reach to the truncated data blocks
i := 0;
while true loop
begin
utl_file.get_raw(bfo, frw, blksz);
i := i+1;

exit when i = firstblk;
exception when others then
exit;
end;
end loop;

utl_file.get_raw(bfo, frw, hsz);

objr := utl_raw.substr(frw, 25, 4);
if endianess > 0 then
objn := to_number(rawtohex(utl_raw.reverse(objr)), ‘XXXXXXXX’);
else
objn := to_number(rawtohex(objr), ‘XXXXXXXX’);
end if;

utl_file.fclose(bfo);

if hdfpath like ‘+%’ or hdfpath like ‘/dev/%’ then
remove_file(tmpdir,hdfile);
end if;
— execute immediate ‘drop directory ‘||hdfdir;
return objn;
end;

/************************************************************************
** Recover Table Data From Special Data File;
**
** oriobjid: Object Id of Table to be Recovered;
** recowner: Owner of Table to be used as recovering dummy table;
** rectable: Name of Table to be used as recovering dummy table;
** rstowner: Owner of Table to store the recovered data;
** rsttable: Name of Table to store the recovered data;
** srcdir: Directory of the Data File to be recovered;
** srcfile: Name of the Data File to be recovered;
** srcisfilesystem: Is the source file located in file system or not;
** tmpdir: Temp Directory to create restore tablespace and other temp files;
** recfile: Name of Data File that rectable is stored;
** coryfile: Name of Copy of Data File that rectable is stored;
** blksz: Block size of the Tablespace Storing the Table to be recovered;
** selflink: database link refer to instance self connect to dba account;
************************************************************************/
procedure recover_table(oriobjid number,
recowner varchar2,
rectab varchar2,
rstowner varchar2,
rsttab varchar2,
srcdir varchar2,
srcfile varchar2,
srcisfilesystem boolean,
tmpdir varchar2,
recfile varchar2,
copyfile varchar2,
blksz number default 8192,
fillblks number default 5,
selflink varchar2 default ”,
endianess number default 1,
recnum in out number,
truncblks in out number)
as
p_tmpsrcfile varchar2(30);
p_finalsrcdir varchar2(255);
— blk blob;
–vrw raw(32767);
frw raw(32767);
tsz number := 4;
hsz number := 28;
objr raw(4);
objn number;
dtail raw(4);
dhead raw(32);
dbody raw(32767);
–bfr bfile;
bfo utl_file.file_type;
bfr utl_file.file_type;
bfw utl_file.file_type;
fillednum number := 0;
dummyheader number;
dummyblks number;
blkstofill number := fillblks;
i number := 0;
j number := 0;
rstnum number := 0;
begin
select header_block+1, blocks-3 into dummyheader, dummyblks from dba_segments where owner = recowner and segment_name = rectab;
if blkstofill > dummyblks then
blkstofill := dummyblks;
end if;

if not srcisfilesystem then
p_tmpsrcfile := gen_file_name(srcfile,”);
copy_file(srcdir, srcfile,tmpdir,p_tmpsrcfile);
p_finalsrcdir := tmpdir;
else
p_tmpsrcfile := srcfile;
p_finalsrcdir := srcdir;
end if;

bfo := utl_file.fopen(p_finalsrcdir, p_tmpsrcfile, ‘RB’);
–utl_file.get_raw(bfo, dbody, blksz-hsz-tsz);
–utl_file.get_raw(bfo, dtail, tsz);

bfr := utl_file.fopen(tmpdir, copyfile, ‘RB’);
bfw := utl_file.fopen(tmpdir, recfile, ‘WB’);
— reach to the transaction blocks to be filled
i := 0;
while true loop
begin
utl_file.get_raw(bfr, frw, blksz);
utl_file.put_raw(bfw, frw);
i := i+1;

exit when i=dummyheader+fillednum;
exception when others then
–raise;
–trace(‘[recover_table] block NO.: ‘||i);
exit;
end;
end loop;

— go through the data file of truncated table
while true loop
begin
–trace(‘[recover_table] ‘||j);
j := j+1;
–objr := substrb(rawtohex(dhead), 49, 8);
utl_file.get_raw(bfo, dhead, hsz);
if hsz <= 24 then
utl_file.get_raw(bfo, dbody, blksz-tsz-hsz);
–objr := substrb(rawtohex(dbody), 49-hsz*2, 8);
objr := utl_raw.substr(dbody, 25-hsz, 4);
else
–objr := substrb(rawtohex(dhead), 49, 8);
objr := utl_raw.substr(dhead, 25, 4);
end if;
if endianess > 0 then
–objn := to_number(utl_raw.reverse(hextoraw(objr)), ‘XXXXXXXX’);
objn := to_number(rawtohex(utl_raw.reverse(objr)), ‘XXXXXXXX’);
else
–objn := to_number(hextoraw(objr), ‘XXXXXXXX’);
objn := to_number(rawtohex(objr), ‘XXXXXXXX’);
end if;

— check if block belongs to truncated table
if objn != oriobjid or substrb(rawtohex(dhead), 1, 2) != ’06’ then
if hsz > 24 then
utl_file.get_raw(bfo, dbody, blksz-hsz);
else
utl_file.get_raw(bfo, dtail, tsz);
end if;
else
–trace(‘[recover_table] Find it.’);
truncblks := truncblks + 1;
if hsz > 24 then
utl_file.get_raw(bfo, dbody, blksz-hsz-tsz);
end if;
utl_file.get_raw(bfo, dtail, tsz);

if not utl_file.is_open(bfr) then
bfr := utl_file.fopen(tmpdir, copyfile, ‘RB’);
end if;
if not utl_file.is_open(bfw) then
bfw := utl_file.fopen(tmpdir, recfile, ‘WB’);
end if;

— filling the trans block
utl_file.get_raw(bfr, dhead, hsz);
utl_file.put_raw(bfw, dhead); — put original header
utl_file.put_raw(bfw, dbody); — replace body
utl_file.get_raw(bfr, dbody, blksz-hsz-tsz); — forward pointer in original file copy
utl_file.get_raw(bfr, dtail, tsz); — get original tail
utl_file.put_raw(bfw, dtail); — put original tail
fillednum := fillednum+1;
i := i+1;
— no trans data block left, copy recovered data to backup table and fill the left blocks
if fillednum >= blkstofill then
–if fillednum+blkstofill-1 >= dummyblks then
begin
while true loop
begin
utl_file.get_raw(bfr, frw, blksz);
utl_file.put_raw(bfw, frw);
i := i+1;

exception when others then
if utl_file.is_open(bfr) then
utl_file.fclose(bfr);
end if;
if utl_file.is_open(bfw) then
utl_file.fclose(bfw);
end if;
exit;
end;
end loop;

rstnum := restore_table(recowner, rectab, rstowner, rsttab, selflink);
— for test
exit when rstnum < 0;
recnum := recnum+rstnum;
fillednum := 0;
commit;

bfr := utl_file.fopen(tmpdir, copyfile, ‘RB’);
bfw := utl_file.fopen(tmpdir, recfile, ‘WB’);
— go to the transaction blocks again
i := 0;
while true loop
begin
utl_file.get_raw(bfr, frw, blksz);
utl_file.put_raw(bfw, frw);
i := i+1;

exit when i=dummyheader+fillednum;
exception when others then
–raise;
–trace(‘[recover_table] block NO.: ‘||i);
exit;
end;
end loop;
utl_file.fflush(bfw);
exception when others then
trace(‘[recover_table 2-1] ‘||sqlerrm);
trace(‘[recover_table 2-1] ‘||dbms_utility.format_error_backtrace);
null;
end;
end if;
end if;
exception
when no_data_found then
exit;
when others then
trace(‘[recover_table 2-2] ‘||sqlerrm);
trace(‘[recover_table 2-2] ‘||dbms_utility.format_error_backtrace);
exit;
end;
end loop;

— last blocks not full filled dummy table
–if fillednum+blkstofill-1 < dummyblks then
if fillednum < blkstofill and rstnum>=0 then
begin
while true loop
begin
utl_file.get_raw(bfr, frw, blksz);
utl_file.put_raw(bfw, frw);
i := i+1;

exception when others then
if utl_file.is_open(bfr) then
utl_file.fclose(bfr);
end if;
if utl_file.is_open(bfw) then
utl_file.fclose(bfw);
end if;
exit;
end;
end loop;
recnum := recnum+restore_table(recowner, rectab, rstowner, rsttab, selflink);
–fillednum := 0;
commit;
end;
end if;
if utl_file.is_open(bfr) then
utl_file.fclose(bfr);
end if;
if utl_file.is_open(bfw) then
utl_file.fclose(bfw);
end if;
if utl_file.is_open(bfo) then
utl_file.fclose(bfo);
end if;
utl_file.fclose_all();

log(truncblks||’ truncated data blocks found. ‘);
log(recnum||’ records recovered in backup table ‘||rstowner||’.’||rsttab);

if not srcisfilesystem then
remove_file(tmpdir,p_tmpsrcfile);
end if;
end;

/************************************************************************
** Recover Table Data From Data Files of Targe Table;
**
** tgtowner: Owner of Target Table to be recovered;
** tgttable: Name of Target Table to be recovered;
** recowner: Owner of Table to be used as recovering dummy table;
** rectable: Name of Table to be used as recovering dummy table;
** rstowner: Owner of Table to store the recovered data;
** rsttable: Name of Table to store the recovered data;
** tmpdir: Temp Directory to create restore tablespace and other temp files;
** srcfile: Name of the Data File to be recovered;
** recfile: Name of Data File that rectable is stored;
** copydir: Directory of Copy of Data File that rectable is stored;
** coryfile: Name of Copy of Data File that rectable is stored;
** blksz: Block size of the Tablespace Storing the Table to be recovered;
** selflink: database link refer to instance self connect to dba account;
************************************************************************/
procedure recover_table(tgtowner varchar2,
tgttable varchar2,
recowner varchar2,
rectab varchar2,
rstowner varchar2,
rsttab varchar2,
tmpdir varchar2,
recfile varchar2,
copyfile varchar2,
blksz number default 8192,
fillblks number default 5,
selflink varchar2 default ”,
offline_files varchar2 default null)
as
tgtobjid number;
recobjid number;
endianess number;
slash char(1);
filedir varchar2(255) := ‘TMP_DATA_FILE_DIR’;
tmpcopyf varchar2(256);
tsname varchar2(30);
readprop varchar2(30);
dtail raw(4);
addinfo raw(32);
recnum number := 0;
truncblks number := 0;
trecnum number := 0;
ttruncblks number := 0;
begin
execute immediate ‘truncate table ‘||rstowner||’.’||rsttab;
execute immediate ‘alter system set db_block_checking=false scope=memory’;
execute immediate ‘alter system set db_block_checksum=false scope=memory’;
execute immediate ‘alter system set “_db_block_check_objtyp”=false scope=memory’;
execute immediate ‘alter session set events ”10231 trace name context forever, level 10”’;
execute immediate ‘alter session set events ”10233 trace name context forever, level 10”’;

select instr(platform_name, ‘Windows’), decode(instr(platform_name, ‘Windows’),0,’/’,’\’) into endianess, slash from v_$database where rownum<=1;
select data_object_id into recobjid from dba_objects where owner = recowner and object_name = rectab and object_type=’TABLE’ and rownum<=1;
log(‘begin to recover table ‘||tgtowner||’.’||tgttable);
tgtobjid := get_seg_data_id(tgtowner, tgttable, tmpdir, blksz, endianess);

if offline_files is not null then
for file_rec in (with target_string as (select /*+inline*/offline_files str, ‘;’ spliter from dual),
files as (select trim(regexp_substr(str, ‘[^’||spliter||’]+’, 1, level)) file_name
from target_string
connect by level <= length (regexp_replace (str, ‘[^’||spliter||’]+’)) + 1)
select substr(file_name,instr(file_name, slash, -1)+1) as filename,
substr(file_name,1,instr(file_name, slash, -1)) as filepath
from files
where file_name is not null) loop –‘
begin
log(‘Recovering data in datafile ‘||file_rec.filepath||file_rec.filename);
recnum := 0;
truncblks := 0;
create_directory(file_rec.filepath,filedir);
recover_table(tgtobjid, recowner, rectab, rstowner, rsttab, filedir, file_rec.filename, (file_rec.filepath not like ‘+%’ and file_rec.filepath not like ‘/dev/%’), tmpdir, recfile, copyfile, blksz, fillblks, selflink, endianess, recnum, truncblks);
— execute immediate ‘drop directory ‘||filedir;
trecnum := trecnum + recnum;
ttruncblks := ttruncblks + truncblks;
exception when others then
trace(‘[recover_table 1] ‘||sqlerrm);
trace(‘[recover_table 1] ‘||dbms_utility.format_error_backtrace);
end;
end loop;
else
if s_repobjid then
get_seg_meta(recowner, rectab, tmpdir, dtail, addinfo, blksz);
select tablespace_name into tsname from dba_tables where owner = tgtowner and table_name = tgttable and rownum<=1;
select STATUS into readprop from dba_tablespaces where tablespace_name = tsname;
if readprop != ‘READ ONLY’ then
execute immediate ‘alter tablespace ‘||tsname||’ read only’;
execute immediate ‘alter system flush buffer_cache’;
end if;
–for file_rec in (select substr(file_name,decode(instr(d.file_name, ‘\’, -1), 0, instr(file_name, ‘/’, -1), instr(file_name, ‘\’, -1))+1) as filename,
— substr(file_name,1,decode(instr(d.file_name, ‘\’, -1), 0, instr(file_name, ‘/’, -1), instr(file_name, ‘\’, -1))) as filepath
— from dba_data_files d, dba_tables t
— where d.tablespace_name = t.tablespace_name and t.owner = tgtowner and t.table_name = tgttable) loop –‘
for file_rec in (select substr(file_name,instr(d.file_name, slash, -1)+1) as filename,
substr(file_name,1,instr(d.file_name, slash, -1)) as filepath
from dba_data_files d, dba_tables t
where d.tablespace_name = t.tablespace_name and t.owner = tgtowner and t.table_name = tgttable) loop –‘
begin
log(‘Recovering data in datafile ‘||file_rec.filepath||file_rec.filename);
recnum := 0;
truncblks := 0;
create_directory(file_rec.filepath,filedir);
tmpcopyf := gen_file_name(file_rec.filename, ”);
copy_file(filedir, file_rec.filename, tmpdir, tmpcopyf);
–replace_segmeta_in_file(srcdir, tmpcopyf, srcdir, file_rec.filename, tgtobjid, recobjid, dtail, 39, addinfo, blksz, endianess);
replace_segmeta_in_file(tmpdir, tmpcopyf, filedir, file_rec.filename, (file_rec.filepath not like ‘+%’ and file_rec.filepath not like ‘/dev/%’), tgtobjid, recobjid, dtail, 39, ”, blksz, endianess);
recover_table(recobjid, recowner, rectab, rstowner, rsttab, filedir, file_rec.filename, (file_rec.filepath not like ‘+%’ and file_rec.filepath not like ‘/dev/%’), tmpdir, recfile, copyfile, blksz, fillblks, selflink, endianess, recnum, truncblks);
–recover_table(tgtobjid, recowner, rectab, rstowner, rsttab, srcdir, file_rec.filename, recdir, recfile, copydir, copyfile, blksz, fillblks, selflink, endianess);
copy_file(tmpdir, tmpcopyf, filedir, file_rec.filename);
remove_file(tmpdir, tmpcopyf);
— execute immediate ‘drop directory ‘||filedir;
trecnum := trecnum + recnum;
ttruncblks := ttruncblks + truncblks;
trace(‘[recover_table 1] ‘||tmpcopyf||’ removed.’);
exception when others then
trace(‘[recover_table 1] ‘||sqlerrm);
trace(‘[recover_table 1] ‘||dbms_utility.format_error_backtrace);
end;
end loop;
if readprop != ‘READ ONLY’ then
execute immediate ‘alter tablespace ‘||tsname||’ read write’;
end if;
else
for file_rec in (select substr(file_name,instr(d.file_name, slash, -1)+1) as filename,
substr(file_name,1,instr(d.file_name, slash, -1)) as filepath
from dba_data_files d, dba_tables t
where d.tablespace_name = t.tablespace_name and t.owner = tgtowner and t.table_name = tgttable) loop –‘
begin
log(‘Recovering data in datafile ‘||file_rec.filepath||file_rec.filename);
recnum := 0;
truncblks := 0;
create_directory(file_rec.filepath,filedir);
recover_table(tgtobjid, recowner, rectab, rstowner, rsttab, filedir, file_rec.filename, (file_rec.filepath not like ‘+%’ and file_rec.filepath not like ‘/dev/%’), tmpdir, recfile, copyfile, blksz, fillblks, selflink, endianess, recnum, truncblks);
— execute immediate ‘drop directory ‘||filedir;
trecnum := trecnum + recnum;
ttruncblks := ttruncblks + truncblks;
exception when others then
trace(‘[recover_table 1] ‘||sqlerrm);
trace(‘[recover_table 1] ‘||dbms_utility.format_error_backtrace);
end;
end loop;
end if;
end if;

log(‘Total: ‘||ttruncblks||’ truncated data blocks found. ‘);
log(‘Total: ‘||trecnum||’ records recovered in backup table ‘||rstowner||’.’||rsttab);

execute immediate ‘alter session set events ”10233 trace name context off”’;
execute immediate ‘alter session set events ”10231 trace name context off”’;
execute immediate ‘alter system set “_db_block_check_objtyp”=true scope=memory’;
execute immediate ‘alter system set db_block_checksum=true scope=memory’;
execute immediate ‘alter system set db_block_checking=true scope=memory’;

log(‘Recovery completed.’);
end;

/************************************************************************
** Prepare the data files to be use during recovering;
**
** tgtowner: Owner of Target Table to be recovered;
** tgttable: Name of Target Table to be recovered;
** datapath: Absolute path of Data Files;
** datadir: Directory to be created referring to datapath;
** rects: Tablespace to store the recovering dummy table;
** recfile: Name of Data File to store the recovering dummy table;
** rstts: Tablespace to store table storing the recovered data;
** rstfile: Name of Data File to store restoring table;
** blksz: Block size of the Tablespace Storing the Table to be recovered;
** rectsblks: block number of recovery tablespace
** rectsblks: block number of restore tablespace
************************************************************************/
procedure prepare_files(tgtowner varchar2,
tgttable varchar2,
tmppath varchar2,
rects out varchar2,
recfile out varchar2,
rstts out varchar2,
rstfile out varchar2,
blksz out varchar2,
rectsblks number default 16,
rsttsblks number default 2560)
as
ext_mgmt varchar2(30);
ss_mgmt varchar2(30);
slash char(1);
begin
select decode(instr(platform_name, ‘Windows’),0,’/’,’\’) into slash from v_$database where rownum<=1;

select block_size, extent_management, segment_space_management into blksz, ext_mgmt, ss_mgmt from dba_tablespaces ts, dba_tables t where t.tablespace_name = ts.tablespace_name and t.owner = upper(tgtowner) and t.table_name = upper(tgttable);

–select ‘FY_REC_DATA’||surfix into rects from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_tablespaces where tablespace_name = ‘FY_REC_DATA’||surfix) order by surfix nulls first) where rownum<=1;
–select ‘FY_REC_DATA’||surfix||’.DAT’ into recfile from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_data_files where file_name like ‘%\FY_REC_DATA’||surfix||’.DAT’) order by surfix nulls first) where rownum<=1;
rects := gen_ts_name(‘FY_REC_DATA’,”);
recfile := gen_file_name(‘FY_REC_DATA’,”);
log(‘Recover Tablespace: ‘||rects||’; Data File: ‘||recfile);
execute immediate ‘create tablespace ‘||rects||’ datafile ”’||rtrim(tmppath, slash)||slash||recfile||”’ size ‘||to_char(blksz*rectsblks/1024)||’K autoextend off extent management ‘||ext_mgmt||’ SEGMENT SPACE MANAGEMENT ‘||ss_mgmt; –‘

–select ‘FY_RST_DATA’||surfix into rstts from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_tablespaces where tablespace_name = ‘FY_REST_DATA’||surfix) order by surfix nulls first) where rownum<=1;
–select ‘FY_RST_DATA’||surfix||’.DAT’ into rstfile from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_data_files where file_name like ‘%\FY_REST_DATA’||surfix||’.DAT’) order by surfix nulls first) where rownum<=1;
rstts := gen_ts_name(‘FY_RST_DATA’,”);
rstfile := gen_file_name(‘FY_RST_DATA’,”);
log(‘Restore Tablespace: ‘||rstts||’; Data File: ‘||rstfile);
execute immediate ‘create tablespace ‘||rstts||’ datafile ”’||rtrim(tmppath, slash)||slash||rstfile||”’ size ‘||to_char(blksz*rsttsblks/1024)||’K autoextend on extent management ‘||ext_mgmt||’ SEGMENT SPACE MANAGEMENT ‘||ss_mgmt; –‘
end;

/************************************************************************
** Clean up existing Recover and Restore Tablespace. Drop tables in the tablespaces
**
** rects: Recover tablespace name
** rects: Restore tablespace name, default NULL, will not do cleaning up;
************************************************************************/
procedure clean_up_ts(rects varchar2,
rstts varchar2 default null)
as
readprop varchar2(30);
begin
select STATUS into readprop from dba_tablespaces where tablespace_name = rects;
if readprop = ‘READ ONLY’ then
execute immediate ‘alter tablespace ‘||rects||’ read write’;
end if;
for tab_rec in (select owner, table_name from dba_tables where tablespace_name = rects) loop
execute immediate ‘drop table ‘||tab_rec.owner||’.’||tab_rec.table_name;
end loop;
if rstts is not null then
for tab_rec in (select owner, table_name from dba_tables where tablespace_name = rstts) loop
execute immediate ‘drop table ‘||tab_rec.owner||’.’||tab_rec.table_name;
end loop;
end if;
end;

/************************************************************************
** Fill Blocks of Recovering Table, to format the blocks;
**
** tgtowner: Owner of Target Table to be recovered;
** tgttable: Name of Target Table to be recovered;
** tmpdir: Temp Directory to be used to create the restore tablespace and files;
** rects: Tablespace to store the recovering dummy table;
** recfile: Name of Data File to store the recovering dummy table;
** rstts: Tablespace to store table storing the recovered data;
** blks: Number blocks in Initial Extent of the recovering dummy table;
** recowner: Owner of Table to be used as recovering dummy table;
** rstowner: Owner of Table to store the recovered data;
** rectable: Name of Table to be used as recovering dummy table;
** rsttable: Name of Table to store the recovered data;
** coryfile: Name of Copy of Data File that rectable is stored;
************************************************************************/
procedure fill_blocks(tgtowner varchar2,
tgttable varchar2,
tmpdir varchar2,
rects varchar2,
recfile varchar2,
rstts varchar2,
blks number default 8,
recowner varchar2 default user,
rstowner varchar2 default user,
rectab in out varchar2,
rsttab in out varchar2,
copyfile out varchar2)
as
blksz number;
blkno number;
cols varchar2(32767);
vals varchar2(32767);
colno number := 0;
begin
if rectab is null then
select block_size into blksz from dba_tablespaces ts, dba_tables t where t.tablespace_name = ts.tablespace_name and t.owner = upper(tgtowner) and t.table_name = upper(tgttable);
— select upper(tgttable||’$’||surfix) into rectab from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_tables where owner = recowner and table_name = upper(tgttable||’$’||surfix)) order by surfix nulls first) where rownum<=1;
rectab := gen_table_name(tgttable, ‘$’, recowner);
log(‘Recover Table: ‘||recowner||’.’||rectab);
–trace(‘[fill_blocks] create table ‘||recowner||’.’||rectab||’ tablespace ‘||rects||’ storage(initial ‘||to_char(blks*blksz/1024)||’K) as select * from ‘||tgtowner||’.’||tgttable||’ where 1=2′);
execute immediate ‘create table ‘||recowner||’.’||rectab||’ tablespace ‘||rects||’ storage(initial ‘||to_char(blks*blksz/1024)||’K) as select * from ‘||tgtowner||’.’||tgttable||’ where 1=2′;
else
–execute immediate ‘truncate table ‘||recowner||’.’||rectab;
execute immediate ‘delete from ‘||recowner||’.’||rectab;
commit;
end if;

cols := ”;
vals := ”;
for col_rec in (select column_name, data_type, nullable from dba_tab_cols where owner = recowner and table_name = rectab) loop
if col_rec.nullable = ‘N’ then
execute immediate ‘alter table ‘||recowner||’.’||rectab||’ modify ‘||col_rec.column_name||’ null’;
end if;
if colno < 6 then
if col_rec.data_type like ‘%CHAR%’ or col_rec.data_type like ‘%RAW%’ then
if colno > 0 then
cols := cols||’,’;
vals := vals||’,’;
end if;
cols := cols||col_rec.column_name;
vals := vals||”’A”’;
colno := colno + 1;
elsif col_rec.data_type like ‘%NUMBER%’ or col_rec.data_type = ‘FLOAT’ then
if colno > 0 then
cols := cols||’,’;
vals := vals||’,’;
end if;
cols := cols||col_rec.column_name;
vals := vals||’0′;
colno := colno + 1;
elsif col_rec.data_type LIKE ‘%TIMESTAMP%’ or col_rec.data_type = ‘DATE’ then
if colno > 0 then
cols := cols||’,’;
vals := vals||’,’;
end if;
cols := cols||col_rec.column_name;
vals := vals||’sysdate’;
colno := colno + 1;
end if;
end if;
end loop;

–select upper(tgttable||’$$’||surfix) into rsttab from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_tables where owner = rstowner and table_name = upper(tgttable||’$$’||surfix)) order by surfix nulls first) where rownum<=1;
if rsttab is null then
rsttab := gen_table_name(tgttable, ‘$$’, rstowner);
log(‘Restore Table: ‘||rstowner||’.’||rsttab);
execute immediate ‘create table ‘||rstowner||’.’||rsttab||’ tablespace ‘||rstts||’ as select * from ‘||recowner||’.’||rectab||’ where 1=2′;
else
execute immediate ‘truncate table ‘||rstowner||’.’||rsttab;
end if;

–trace(‘[fill_blocks] insert into ‘||recowner||’.’||rectab||'(‘||cols||’) values (‘||vals||’)’);
while true loop
execute immediate ‘insert into ‘||recowner||’.’||rectab||'(‘||cols||’) values (‘||vals||’)’;
execute immediate ‘select count(unique(dbms_rowid.rowid_block_number( rowid ))) from ‘||recowner||’.’||rectab into blkno ;
exit when blkno >= blks-3;
end loop;
commit;
execute immediate ‘alter system flush buffer_cache’;
execute immediate ‘delete from ‘||recowner||’.’||rectab;
commit;
execute immediate ‘alter system flush buffer_cache’;
trace(‘[fill_blocks] Data Blocks formatted.’);

execute immediate ‘alter tablespace ‘||rects||’ read only’;

select ‘FY_REC_DATA_COPY’||surfix||’.DAT’ into copyfile from (select surfix from (select null surfix from dual union all select level surfix from dual connect by level <= 255) where not exists (select 1 from dba_data_files where file_name like ‘%FY_REC_DATA_COPY’||surfix||’.DAT’) order by surfix nulls first) where rownum<=1;
copy_file(tmpdir, recfile, tmpdir, copyfile);
log(‘Copy file of Recover Tablespace: ‘||copyfile);
end;

/************************************************************************
** Create recovery table on new file of truncated table’s tablespace;
**
** tgtowner: Owner of Target Table to be recovered;
** tgttable: Name of Target Table to be recovered;
** datadir: Directory to be created referring to datapath;
** rects: Tablespace to store the recovering dummy table;
** recfid: ID of Data File to store the recovering dummy table;
** recfile: Name of Data File to store the recovering dummy table;
** rectable: Name of Table to be used as recovering dummy table;
** blks: Number blocks in Initial Extent of the recovering dummy table;
** rectsblks: block number of recovery tablespace
************************************************************************/
procedure create_rectab_on_tgttab_ts( tgtowner varchar2,
tgttable varchar2,
datadir varchar2,
recowner varchar2 default user,
rects out varchar2,
recfid in out number,
recfile out varchar2,
rectab out varchar2,
blks number default 8,
rectsblks number default 16)
as
blksz number;
tsid number;
tsonline number;
datapath varchar2(32767);
r_files r_cursor;
filelist t_fileprops;
tn number;
begin
select ts.ts#, ts.name, ts.online$, blocksize into tsid, rects, tsonline, blksz from sys.ts$ ts, dba_tables t where t.tablespace_name = ts.name and t.owner = upper(tgtowner) and t.table_name = upper(tgttable);
if tsonline = 4 then
execute immediate ‘alter tablespace ‘||rects||’ read write’;
end if;

if recfid is null then
open r_files for select file#,status$ bulk from sys.file$ where ts#=tsid;
fetch r_files bulk collect into filelist;
recfile := gen_file_name(‘FY_REC_DATA’,”);
select rtrim(directory_path, ‘\’)||’\’ into datapath from dba_directories where directory_name = datadir; –‘
execute immediate ‘alter tablespace ‘||rects||’ add datafile ”’||datapath||recfile||”’ size ‘||to_char(rectsblks*blksz/1024)||’K’;
select file_id into recfid from dba_data_files where tablespace_name = rects and (file_name like ‘%\’||recfile or file_name like ‘%/’||recfile); –‘
else
open r_files for select file#,status$ bulk from sys.file$ where ts#=tsid and file#!=recfid;
fetch r_files bulk collect into filelist;
trace(‘[create_rectab_on_tgttab_ts] file id: ‘||recfid);
select decode(instr(file_name, ‘/’, -1), 0, substr(file_name,instr(file_name, ‘\’, -1)+1), substr(file_name,instr(file_name, ‘/’, -1)+1)) into recfile from dba_data_files where file_id = recfid; –‘
end if;
log(‘Recover Tablespace: ‘||recfile||'(‘||recfid||’)’);
for i in 1..filelist.count loop
update sys.file$ f set status$=1 where ts#=tsid and file# = filelist(i).file#;
end loop;
commit;
execute immediate ‘alter system flush buffer_cache’;
–select file# into tn from sys.file$ where ts#=tsid and status$=2;
–trace(‘[create_rectab_on_tgttab_ts] inactive files: ‘||filelist.count);
–trace(‘[create_rectab_on_tgttab_ts] active file id: ‘||tn);
rectab := gen_table_name(tgttable, ‘$’, recowner);
log(‘Recover Table: ‘||recowner||’.’||rectab);
–dbms_lock.sleep(3);
execute immediate ‘create table ‘||recowner||’.’||rectab||’ tablespace ‘||rects||’ storage(initial ‘||to_char(blks*blksz/1024)||’K) as select * from ‘||tgtowner||’.’||tgttable||’ where 1=2′;
select header_file into tn from dba_segments where owner = recowner and segment_name = rectab;
trace(‘[create_rectab_on_tgttab_ts] header file: ‘||filelist.count);
for i in 1..filelist.count loop
update sys.file$ f set status$=filelist(i).status$ where ts#=tsid and file# = filelist(i).file#;
end loop;
commit;
execute immediate ‘alter system flush buffer_cache’;
end;

procedure replace_segraw_in_file( srcdir varchar2,
srcfile varchar2,
dstdir varchar2,
dstfile varchar2,
blknum number,
startpos number,
repcont raw,
blksz number default 8192)
as
bfr utl_file.file_type;
bfw utl_file.file_type;
dbody raw(32767);
i number;
p_srcdir varchar2(255) := srcdir;
p_srcfile varchar2(255) := srcfile;
p_dstdir varchar2(255) := dstdir;
p_dstfile varchar2(255) := dstfile;
begin
if p_dstdir is null then
p_dstdir := p_srcdir;
end if;
trace(‘[replace_segraw_in_file] replace block id: ‘||blknum||’ start: ‘||startpos||’ content: ‘||repcont);
bfr := utl_file.fopen(p_srcdir, p_srcfile, ‘RB’);
bfw := utl_file.fopen(p_dstdir, p_dstfile, ‘WB’);

i := 0;
while true loop
begin
utl_file.get_raw(bfr, dbody, blksz);
utl_file.put_raw(bfw, dbody);
i := i+1;

exit when i = blknum-1;
exception when others then
exit;
end;
end loop;

utl_file.get_raw(bfr, dbody, blksz);
if startpos<=1 then
utl_file.put_raw(bfw, utl_raw.concat(repcont, utl_raw.substr(dbody, 1+utl_raw.length(repcont))));
else
utl_file.put_raw(bfw, utl_raw.concat(utl_raw.substr(dbody, 1, startpos-1), repcont, utl_raw.substr(dbody, startpos+utl_raw.length(repcont))));
end if;

while true loop
begin
utl_file.get_raw(bfr, dbody, blksz);
utl_file.put_raw(bfw, dbody);

exception
when no_data_found then
exit;
when others then
trace(‘[replace_segraw_in_file] ‘||SQLERRM);
trace(‘[replace_segraw_in_file] ‘||dbms_utility.format_error_backtrace);
exit;
end;
end loop;

utl_file.fclose(bfw);
utl_file.fclose(bfr);
trace(‘[replace_segraw_in_file] completed.’);
end;

procedure dump_seg_block_raw( hdfile varchar2,
srcdir varchar2,
blknb number,
blksz number default 8192)
as
frw raw(32767);
bfo utl_file.file_type;
bfw utl_file.file_type;
i number := 0;
begin
bfo := utl_file.fopen(srcdir, hdfile, ‘RB’);
bfw := utl_file.fopen(srcdir, hdfile||’_’||blknb||’.BLK’, ‘WB’);

— reach to the truncated data blocks
i := 0;
while true loop
begin
utl_file.get_raw(bfo, frw, blksz);
i := i+1;

exit when i = blknb;
exception when others then
exit;
end;
end loop;

utl_file.get_raw(bfo, frw, blksz);
utl_file.put_raw(bfw, frw);

utl_file.fclose(bfo);
utl_file.fclose(bfw);
end;
/*——————————————————————————————
procedure test_chain(filename varchar2,
blknum number,
startpos number,
repcont raw,
srcdir varchar2 default ‘FY_DATA_DIR’)
as
tmpcopyf varchar2(256);
begin
execute immediate ‘alter system set db_block_checking=false scope=memory’;
execute immediate ‘alter system set db_block_checksum=false scope=memory’;
execute immediate ‘alter system set “_db_block_check_objtyp”=false scope=memory’;
execute immediate ‘alter session set events ”10231 trace name context forever, level 10”’;
execute immediate ‘alter session set events ”10233 trace name context forever, level 10”’;
begin
tmpcopyf := gen_file_name(filename, ‘$’);
trace(‘[test_chain] bakcup file ‘||tmpcopyf);
copy_file(srcdir, filename, srcdir, tmpcopyf);
replace_segraw_in_file(srcdir, tmpcopyf, srcdir, filename, blknum, startpos, repcont, 8192);
execute immediate ‘alter system flush buffer_cache’;
for rec in (select * from t_chain where rowid=’AABFUoAAHAAAABFAAA’) loop
null;
end loop;
trace(‘[test_chain] table query completed’);
exception when others then
trace(‘[test_chain] ‘||sqlerrm);
trace(‘[test_chain] ‘||dbms_utility.format_error_backtrace);
end;
copy_file(srcdir, tmpcopyf, srcdir, filename);
remove_file(srcdir, tmpcopyf);
trace(‘[test_chain] ‘||tmpcopyf||’ removed.’);
execute immediate ‘alter system set db_block_checking=true scope=memory’;
execute immediate ‘alter system set db_block_checksum=true scope=memory’;
execute immediate ‘alter system set “_db_block_check_objtyp”=true scope=memory’;
execute immediate ‘alter session set events ”10231 trace name context off”’;
execute immediate ‘alter session set events ”10233 trace name context off”’;
exception when others then
trace(‘[test_chain] ‘||sqlerrm);
trace(‘[test_chain] ‘||dbms_utility.format_error_backtrace);
end;
——————————————————————————————*/
procedure test_rec1( tow varchar2 default ‘DEMO’,
ttb varchar2 default ‘T_CHAIN’,
fbks number default 1,
tmppath varchar2 default ‘/tmp/’) –‘
as
tgtowner varchar2(30):= upper(tow);
tgttable varchar2(30):= upper(ttb);
tmpdir varchar2(30);
rects varchar2(30);
recfile varchar2(30);
rstts varchar2(30);
rstfile varchar2(30);
blksz number;
rectab varchar2(30);
rsttab varchar2(30);
copyfile varchar2(30);
begin
tmpdir := ‘FY_DATA_DIR’;
create_directory(tmppath, tmpdir);
prepare_files(tgtowner, tgttable, tmpdir, rects, recfile, rstts, rstfile, blksz);
rects := ‘FY_REC_DATA’;
rstts := ‘FY_RST_DATA’;
recfile := ‘FY_REC_DATA.DAT’;
fill_blocks(tgtowner, tgttable, tmpdir, rects, recfile, rstts, 8, tgtowner, tgtowner, rectab, rsttab, copyfile);
recover_table(tgtowner, tgttable, tgtowner, rectab, tgtowner, rsttab, tmpdir, recfile, copyfile, blksz, fbks, ‘myself’);
— execute immediate ‘drop directory ‘||tmpdir;
end;

procedure test_rec2( tow varchar2 default ‘DEMO’,
ttb varchar2 default ‘T_CHAIN’,
fbks number default 1)
as
tgtowner varchar2(30):= upper(tow);
tgttable varchar2(30):= upper(ttb);
tmpdir varchar2(30);
rects varchar2(30);
recfile varchar2(30);
rstts varchar2(30);
blksz number;
rectab varchar2(30);
rsttab varchar2(30);
copyfile varchar2(30);
begin
tmpdir := ‘FY_DATA_DIR’;
rects := ‘FY_REC_DATA’;
rstts := ‘FY_RST_DATA’;
recfile := ‘FY_REC_DATA.DAT’;
clean_up_ts(rects, rstts);
select block_size into blksz from dba_tablespaces ts, dba_tables t where ts.tablespace_name = t.tablespace_name and t.owner = tgtowner and t.table_name = tgttable;
fill_blocks(tgtowner, tgttable, tmpdir, rects, recfile, rstts, 8, tgtowner, tgtowner, rectab, rsttab, copyfile);
recover_table(tgtowner, tgttable, tgtowner, rectab, tgtowner, rsttab, tmpdir, recfile, copyfile, blksz, fbks, ‘myself’);
— execute immediate ‘drop directory ‘||tmpdir;
end;

procedure test_rec3( tow varchar2 default ‘DEMO’,
ttb varchar2 default ‘T_CHAIN’,
fbks number default 1,
fid number default null)
as
tgtowner varchar2(30):= upper(tow);
tgttable varchar2(30):= upper(ttb);
tmpdir varchar2(30);
rects varchar2(30);
recfile varchar2(30);
rstts varchar2(30);
blksz number;
rectab varchar2(30);
rsttab varchar2(30);
copyfile varchar2(30);
recfid number:= fid;
begin
tmpdir := ‘FY_DATA_DIR’;
rstts := ‘FY_RST_DATA’;
–begin
— execute immediate ‘drop table ‘||tgtowner||’.’||tgttable||’$’;
— execute immediate ‘drop table ‘||tgtowner||’.’||tgttable||’$$’;
–exception when others then
— null;
–end;
create_rectab_on_tgttab_ts(tgtowner, tgttable, tmpdir, tgtowner, rects, recfid, recfile, rectab, 8, 16);
select block_size into blksz from dba_tablespaces ts, dba_tables t where ts.tablespace_name = t.tablespace_name and t.owner = tgtowner and t.table_name = tgttable;
fill_blocks(tgtowner, tgttable, tmpdir, rects, recfile, rstts, 8, tgtowner, tgtowner, rectab, rsttab, copyfile);
recover_table(tgtowner, tgttable, tgtowner, rectab, tgtowner, rsttab, tmpdir, recfile, copyfile, blksz, fbks, ‘myself’);
— execute immediate ‘drop directory ‘||tmpdir;
begin
–execute immediate ‘drop table ‘||tgtowner||’.’||rectab;
–execute immediate ‘alter tablespace ‘||rects||’ drop datafile ‘||recfid;
–exception when others then
null;
end;
end;

procedure recover_truncated_table( tow varchar2,
ttb varchar2,
fbks number default 1,
tmppath varchar2 default null,
offline_files varchar2 default null) –‘
as
tgtowner varchar2(30):= upper(tow);
tgttable varchar2(30):= upper(ttb);
tmpdir varchar2(30);
rects varchar2(30);
recfile varchar2(30);
rstts varchar2(30);
rstfile varchar2(30);
blksz number;
rectab varchar2(30);
rsttab varchar2(30);
copyfile varchar2(30);
fy_ts_cnt number:= 0;
endianess pls_integer;
temppath varchar2(32767):=tmppath;
begin
select instr(platform_name, ‘Windows’) into endianess from v_$database where rownum<=1;
if temppath is null then
if endianess > 0 then
temppath:=’c:\temp\’;
else
temppath:=’/tmp/’;
end if;
end if;
dbms_output.enable(999999);
tmpdir := ‘FY_DATA_DIR’;
rects := ‘FY_REC_DATA’;
rstts := ‘FY_RST_DATA’;
recfile := ‘FY_REC_DATA.DAT’;
create_directory(temppath, tmpdir);
select count(*) into fy_ts_cnt from dba_tablespaces where tablespace_name in (rects,rstts);
if fy_ts_cnt = 2 then
clean_up_ts(rects, rstts);
select substr(file_name,decode(instr(file_name, ‘\’, -1), 0, instr(file_name, ‘/’, -1), instr(file_name, ‘\’, -1))+1)
into recfile
from dba_data_files
where tablespace_name = rects
and rownum<=1;
else
prepare_files(tgtowner, tgttable, temppath, rects, recfile, rstts, rstfile, blksz);
end if;
select block_size into blksz from dba_tablespaces ts, dba_tables t where ts.tablespace_name = t.tablespace_name and t.owner = tgtowner and t.table_name = tgttable;
fill_blocks(tgtowner, tgttable, tmpdir, rects, recfile, rstts, 8, tgtowner, tgtowner, rectab, rsttab, copyfile);
recover_table(tgtowner, tgttable, tgtowner, rectab, tgtowner, rsttab, tmpdir, recfile, copyfile, blksz, fbks, ‘myself’, offline_files);
log(‘Data has been recovered to ‘||tgtowner||’.’||rsttab);
–execute immediate ‘DROP TABLESPACE ‘||rects||’ INCLUDING CONTENTS AND DATAFILES ‘;
–execute immediate ‘DROP TABLESPACE ‘||rstts||’ INCLUDING CONTENTS AND DATAFILES ‘;
–remove_file(tmpdir,recfile);
–remove_file(tmpdir,rstfile);
remove_file(tmpdir,copyfile);
— execute immediate ‘DROP DIRECTORY ‘||tmpdir;
end;

begin
null;
end FY_Recover_Data;
/

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