--sys--
create tablespace tbs_nocompression datafile size 10M autoextend on;
create tablespace tbs_basic datafile size 10M autoextend on default compress basic;
create tablespace tbs_oltp datafile size 10M autoextend on default compress for oltp;
create tablespace tbs_query datafile size 10M autoextend on default compress for query;
create tablespace tbs_archive datafile size 10M autoextend on default compress for archive;
select t.tablespace_name, t.def_tab_compression, t.compress_for from dba_tablespaces t
where t.tablespace_name in ('TBS_NOCOMPRESSION', 'TBS_BASIC', 'TBS_OLTP',
'TBS_QUERY',
'TBS_ARCHIVE');
--hr--
create table t_nocompression (a varchar2(200)) tablespace tbs_nocompression;
create table t_basic (a varchar2(200)) tablespace tbs_basic;
create table t_oltp (a varchar2(200)) tablespace tbs_oltp;
--hr-error--
create table t_query (a varchar2(200)) tablespace tbs_query;
create table t_archive (a varchar2(200)) tablespace tbs_archive;
--hr--
begin
for i in 1..400
loop
insert into t_nocompression values('AAAAAAAAAAAAAAAAAAAA');
end loop;
commit;
end;
--hr--
begin
for i in 1..400
loop
insert into t_basic values('AAAAAAAAAAAAAAAAAAAA');
end loop;
commit;
end;
--hr--
begin
for i in 1..400
loop
insert into t_oltp values('AAAAAAAAAAAAAAAAAAAA');
end loop;
commit;
end;
--hr--
select t.TABLE_NAME, t.PCT_FREE , t.COMPRESSION , t.COMPRESS_FOR, t.TABLESPACE_NAME
from user_tables t where t.TABLE_NAME in ('T_NOCOMPRESSION','T_BASIC','T_OLTP');
select count(*) , substr(rowid, 10, 6 ) from hr.t_nocompression group by substr(rowid, 10, 6 );
select count(*) , substr(rowid, 10, 6 ) from hr.t_basic group by substr(rowid, 10, 6 );
select count(*) , substr(rowid, 10, 6 ) from hr.t_oltp group by substr(rowid, 10, 6 );
--sys--
select
count(*) , dbms_compression.get_compression_type(ownname =>
'HR',tabname => 'T_NOCOMPRESSION',row_id => rowid)
from
hr.T_NOCOMPRESSION group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_NOCOMPRESSION',row_id => rowid);
--sys--
select count(*) , dbms_compression.get_compression_type(ownname => 'HR',tabname => 'T_BASIC',row_id => rowid)
from hr.T_BASIC group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_BASIC',row_id => rowid);
--sys--
select count(*) , dbms_compression.get_compression_type(ownname => 'HR',tabname => 'T_OLTP',row_id => rowid)
from hr.T_OLTP group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_OLTP',row_id => rowid);
--hr--
create table t_basic2 (a varchar2(200)) tablespace tbs_nocompression compress;
create table t_oltp2 (a varchar2(200)) tablespace tbs_nocompression compress for oltp;
--hr-error--
create table t_query2 (a varchar2(200)) tablespace tbs_nocompression compress for query;
create table t_archive2 (a varchar2(200)) tablespace tbs_nocompression compress for archive;
--hr--
select t.TABLE_NAME, t.PCT_FREE , t.COMPRESSION , t.COMPRESS_FOR, t.TABLESPACE_NAME
from user_tables t where t.TABLE_NAME in ('T_NOCOMPRESSION','T_BASIC','T_OLTP', 'T_BASIC2','T_OLTP2' );
--hr--
begin
for i in 1..400
loop
insert into t_basic2 values('AAAAAAAAAAAAAAAAAAAA');
end loop;
commit;
end;
--hr--
begin
for i in 1..400
loop
insert into t_oltp2 values('AAAAAAAAAAAAAAAAAAAA');
end loop;
commit;
end;
--hr--
select count(*) , substr(rowid, 10, 6 ) from hr.t_basic2 group by substr(rowid, 10, 6 );
select count(*) , substr(rowid, 10, 6 ) from hr.t_oltp2 group by substr(rowid, 10, 6 );
--sys--
select count(*) , dbms_compression.get_compression_type(ownname => 'HR',tabname => 'T_BASIC2',row_id => rowid)
from hr.T_BASIC2 group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_BASIC2',row_id => rowid);
--sys--
select count(*) , dbms_compression.get_compression_type(ownname => 'HR',tabname => 'T_OLTP2',row_id => rowid)
from hr.T_OLTP2 group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_OLTP2',row_id => rowid);
--hr--
alter table t_nocompression compress for oltp;
select t.TABLE_NAME, t.PCT_FREE , t.COMPRESSION , t.COMPRESS_FOR, t.TABLESPACE_NAME
from user_tables t where t.TABLE_NAME in ('T_NOCOMPRESSION','T_BASIC','T_OLTP', 'T_BASIC2','T_OLTP2' );
select count(*) , substr(rowid, 10, 6 ) from hr.t_nocompression group by substr(rowid, 10, 6 );
--sys--
select
count(*) , dbms_compression.get_compression_type(ownname =>
'HR',tabname => 'T_NOCOMPRESSION',row_id => rowid)
from
hr.T_NOCOMPRESSION group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_NOCOMPRESSION',row_id => rowid);
--hr--
begin
for i in 1..400
loop
insert into t_nocompression values('AAAAAAAAAAAAAAAAAAAA');
end loop;
commit;
end;
--hr--
select count(*) , substr(rowid, 10, 6 ) from hr.t_nocompression group by substr(rowid, 10, 6 );
--sys--
select
count(*) , dbms_compression.get_compression_type(ownname =>
'HR',tabname => 'T_NOCOMPRESSION',row_id => rowid)
from
hr.T_NOCOMPRESSION group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_NOCOMPRESSION',row_id => rowid);
--hr--
alter table t_nocompression move tablespace tbs_nocompression;
select count(*) , substr(rowid, 10, 6 ) from hr.t_nocompression group by substr(rowid, 10, 6 );
--sys--
select
count(*) , dbms_compression.get_compression_type(ownname =>
'HR',tabname => 'T_NOCOMPRESSION',row_id => rowid)
from
hr.T_NOCOMPRESSION group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_NOCOMPRESSION',row_id => rowid);
--hr--
select count(*) , substr(rowid, 10, 6 ) from hr.t_basic group by substr(rowid, 10, 6 );
insert /*+ append */ into t_basic select * from t_basic;
commit;
select count(*) , substr(rowid, 10, 6 ) from hr.t_basic group by substr(rowid, 10, 6 );
--sys--
select count(*) , dbms_compression.get_compression_type(ownname => 'HR',tabname => 'T_BASIC',row_id => rowid)
from hr.T_BASIC group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_BASIC',row_id => rowid);
--hr--
alter table t_basic move tablespace TBS_NOCOMPRESSION;
select count(*) , substr(rowid, 10, 6 ) from hr.t_basic group by substr(rowid, 10, 6 );
--sys--
select count(*) , dbms_compression.get_compression_type(ownname => 'HR',tabname => 'T_BASIC',row_id => rowid)
from hr.T_BASIC group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_BASIC',row_id => rowid);
--sys-evolution--
drop table hr.t_basic_big;
create table hr.t_basic_big compress as select * from dba_source;
--sys-advisor--
declare
v_blkcnt_cmp number;
v_blkcnt_uncmp number;
v_row_cmp number;
v_row_uncmp number;
v_cmp_ratio number;
v_comptype_str varchar2(200);
BEGIN
DBMS_COMPRESSION.GET_COMPRESSION_RATIO(scratchtbsname => 'USERS',
ownname =>'HR',
tabname =>'T_BASIC_BIG',
partname =>null,
comptype => 2,
blkcnt_cmp => v_blkcnt_cmp,
blkcnt_uncmp => v_blkcnt_uncmp,
row_cmp =>v_row_cmp,
row_uncmp => v_row_uncmp,
cmp_ratio => v_cmp_ratio,
comptype_str
=>v_comptype_str);
DBMS_OUTPUT.PUT_LINE('Blk count compressed = ' || v_blkcnt_cmp);
DBMS_OUTPUT.PUT_LINE('Blk count uncompressed = ' || v_blkcnt_uncmp);
DBMS_OUTPUT.PUT_LINE('Row count per block compressed = ' || v_row_cmp);
DBMS_OUTPUT.PUT_LINE('Row count per block uncompressed = ' || v_row_uncmp);
DBMS_OUTPUT.PUT_LINE('ratio: '||v_cmp_ratio);
DBMS_OUTPUT.PUT_LINE('Compression type = ' || v_comptype_str);
end;
--sys--
select count(*) , dbms_compression.get_compression_type(ownname => 'HR',tabname => 'T_BASIC_BIG',row_id => rowid)
from hr.T_BASIC_BIG group by
dbms_compression.get_compression_type(ownname => 'HR',tabname =>
'T_BASIC_BIG',row_id => rowid);
--hr--
create table t_basic_col( a number , b varchar2(20)) compress ;
insert into t_basic_col values ( 1,'A') ;
commit;
create table t_oltp_col( a number , b varchar2(20)) compress for oltp;
insert into t_oltp_col values ( 1,'A') ;
commit;
select * from t_basic_col;
select * from t_oltp_col;
alter table t_basic_col drop column b;
alter table t_basic_col drop ( b);
alter table t_oltp_col drop column b;
select * from t_oltp_col;
--sys-lob--
drop directory dir1;
create directory dir1 as '/home/oracle';
grant all on directory dir1 to hr;
--hr-lob--
create table t_lob_bf( name varchar2(20) , image blob )
lob(image) store as basicfile;
create table t_lob_sf( name varchar2(20) , image blob )
lob(image) store as securefile ( compress high deduplicate lob);
declare
v_f BFILE;
v_b blob;
BEGIN
for i in 1..100
loop
INSERT INTO t_lob_bf values('oracle.jpg',EMPTY_BLOB ()) RETURN image into v_b;
v_f := BFILENAME ('DIR1', 'oracle.jpg');
DBMS_LOB.FILEOPEN (v_f, DBMS_LOB.FILE_READONLY);
DBMS_LOB.LOADFROMFILE (v_b, v_f, DBMS_LOB.GETLENGTH (v_f));
DBMS_LOB.FILECLOSE (v_f);
commit;
end loop;
end;
declare
v_f BFILE;
v_b blob;
BEGIN
for i in 1..100
loop
INSERT INTO t_lob_sf values('oracle.jpg',EMPTY_BLOB ()) RETURN image into v_b;
v_f := BFILENAME ('DIR1', 'oracle.jpg');
DBMS_LOB.FILEOPEN (v_f, DBMS_LOB.FILE_READONLY);
DBMS_LOB.LOADFROMFILE (v_b, v_f, DBMS_LOB.GETLENGTH (v_f));
DBMS_LOB.FILECLOSE (v_f);
commit;
end loop;
end;
select * from user_segments where segment_name in
(select segment_name from user_lobs) ; |
