1. ® IBM Software Group © 2005 IBM Corporation © IBM Corporation 2004 Informix Table Level Point in Time Restore for IDS and XPS John F. Miller III

2. IBM Software Group 2 Agenda What is Table Level Point in Time Restore (TLPITR)  Syntax and Semantics  Content Release Phases  TLPITR Testing

3. IBM Software Group 3 TLPITR  Provide the customer with the ability to easily extract a set of tables, a table or a portion of a table from a level 0 archive to a user specified point in time.  The extracted data can be placed in an external table or on a table on the server of the user’s choice regardless of server version or machine type as long as the database server is listed in the sqlhost file.

4. IBM Software Group 4 Benefits  Extract a table or set of tables  Filter the retrieved data  Retrieve just a subset of columns  Repartition the data  Data may be placed in the same version database or on a different database version with a different machine architecture

5. IBM Software Group 5 Agenda  What is Table Level Point in Time Restore (TLPITR) Syntax and Semantics  Content Release Phases  TLPITR Testing

6. IBM Software Group 6 System Overview schema command file schema command file archecker AC_CONFIG file ixbar file ixbar file archecker Database AC_MSGPATH file (AC_CONFIG parameter) AC_MSGPATH file (AC_CONFIG parameter)

7. IBM Software Group 7 Schema Command File  Database  Insert into … Select  Create table  Set  Restore  SQL comments

8. IBM Software Group 8 Database Statement  Set the current database statement  All table names referenced following the database statement are associated with the current database unless fully qualified  DATABASE [LOG MODE ANSI]

9. IBM Software Group 9 Create Table Statement  The full create table syntax is supported  This statement is used to specify both target and source tables  Source Table  A table that is on the archive backup  Target Table  The destination table, where the data should be placed

10. IBM Software Group 10 Source Table  A table that is on the archive backup  For each source table you must specify the storage options.  The dbspace names in the fragmentation clause used to find the table’s data  The exact fragmentation schema is not required  Exact column layout is required  Column types and locations must be exact  Not able to be completely verify column layout

11. IBM Software Group 11 Target Table  If the target table exists then data is appended  If the target does not exist then the table is created  All attributes specified in the schema file will be utilized

12. IBM Software Group 12 External Table  Used to specify a pipe or OS file as the location of the physical portion of the restore  CREATE EXTERNAL TABLE …. USING (‘ ’, ‘ ’);  Format  INFORMIX or (ASCII) DELIMITED  Logical restore does not happen

13. IBM Software Group 13 Insert into Select From Statement  Only a subset of the insert/select syntax is supported  One table retrieved per statement  Each statement requires a separate connection to the database  A source table may only be extracted once per restore  no multi-siting  A table name may only exist once as a source table

14. IBM Software Group 14 Insert into Select From Statement FeatureSupportedUnsupported Insert table 1. fully qualified table name 1. views 2. synonyms Insert columns 1. column names 1. column aliases 2. constants Select columns 1. column name 2. projection list 3. all columns ‘*’ 1. subscripting 2. column aliases 3. constants 4. aggregate 5. expressions 6. stored procedures From Clause 1. single table 1. views 2. multiple tables 3. synonyms

15. IBM Software Group 15 Insert into Select From Statement (cont’ed) FeatureSupportedUnSupported Where Clause 1. Equal, Not Equal ( =, ==, <> ) 2. Less than, Less than equal to 3. Greater than, Greater than equal to 4. Match, Not Match, Like, Not Like 5. IS NULL, NOT NULL 6. AND 7. OR 8. TODAY/CURRENT Joins Subqueries Functions Procedures Math Expr. Having Clause All Parts Group ByAll Parts Into TempAll Parts Order byAll Parts UnionAll Parts

16. IBM Software Group 16 Set Statement  COMMIT TO  Sets the number of records to insert before committing  SET COMMIT TO  Default to 1000  WORKSPACE TO  Directs temporary tables and indexes to the dbspaces listed

17. IBM Software Group 17 Restore Command  Defines point in time to restore data to  Defines if logical recovery should occur  Default is RESTORE TO CURRENT  RESTORE [ TO | CURRENT] [ WITH NO LOG ]  Drops and Truncate Tables stops recovery

18. IBM Software Group 18 Archecker Config File  Set the existing environment variable AC_CONFIG to the relative or full path name of the configuration file  If ONCONFIG is set correctly, those values will be used as defaults. AC_MSGPATH/tmp/ac.log# Archecker message log AC_STORAGE/tmp# Directory used for temp storage AC_VERBOSE1# 1 verbose 0 terse messages AC_IXBAR/tmp/ixbar# Path to ixbar file AC_TAPEBLOCK32# Blocksize in KB AC_SCHEMA schcmd.txt# Schema command file

19. IBM Software Group 19 Archecker Command Line  Start archecker in TLPITR mode w/ schema file archecker –bsv –f {schema cmd file}  Start archecker in TLR mode archecker –bvsX tUse ontape interface bUse onbar interface sPrint information to the screen vVerbose fSchema command file, implies X XTable Level unloads

20. IBM Software Group 20 Example Screen Output  archecker -bvs -f schema_cmd.txt AC_STORAGE /tmp AC_MSGPATH/tmp/ac.log AC_VERBOSEon AC_TAPEBLOCK32 AC_PAGESIZE4096 AC_IXBAR/vobs/tristarm/sqldist/etc/Bixbar_olympia.85 Extracting table dbs:source_table into dbs1:target_table Scan PASSED Control page checks PASSED Table checks PASSED Table extraction commands 1 Tables/fragments found on archive 1 LOADED: dbms1:m_frag_new produced 2008 rows.

21. IBM Software Group 21 Recovery of Lost Table  Extracts a table called test1:tlr from the most recent backup of dbspace1 and places the data in table test1:tlr database test1; create table tlr ( a_serial serial, b_integer integer, c_char char(20), d_decimal decimal, ) in dbspace1; insert into tlr select * from tlr;

22. IBM Software Group 22 Restoring from a Previous Backup  Extracts a table called test1:tlr from the level 0 backup of dbspace1 just prior “2003-01-01 01:01:01” and places the data in table test1:tlr database test1; create table tlr ( a_serial serial, b_integer integer, c_char char(20), d_decimal decimal, ) in dbspace1; insert into tlr select * from tlr; restore to ‘2003-01-01 01:01:01’;

23. IBM Software Group 23 Extracting a Subset of Columns  Extracts a table called test1:source_tab from the most recent backup of dbspace1 and places the data in column c_char into column X_char, d_decimal into Y_decimal in table test1:target_tab database test1; create table source_tab ( a_serial serial, c_char char(20), d_decimal decimal ) in dbspace1; create table target_tab ( X_char char(20), Y_decimal decimal, Z_name char(40) ) in dbspace2; insert into target_tab ( X_char, Y_decimal ) select c_char,d_decimal from source_tab;

24. IBM Software Group 24 Using Data Filtering  Extracts the physical records only from a table called test1:tlr from the most recent backup of dbspace1 and places the data in table test1:tlr only where the where conditions are true. database test1; create table tlr ( a_serial serial, b_integer integer, c_char char(20), d_decimal decimal, ) in dbspace1; insert into tlr select * from tlr where c_char matches ‘j*’ and d_decimal is NOT NULL and b_integer > 100; RESTORE WITH NO LOG

25. IBM Software Group 25 Using External Tables  Extracts a table called dl:source_tab from the most recent backup of dbspace1 and sends the data in ASCII format with fields delimited to the file named /TMP/PIPE. database d1; create table source_tab (cola int) in dbspace1; create external table target_tab (cola int) USING (‘/TMP/PIPE’, ‘DELIMITED’); insert into target_tab select * from source_tab;

26. IBM Software Group 26 Two Table Example  Extracts a table called test1:tlr_1 and test:tlr_2 from the most recent backup of dbspace1 and places the data in table test1:tlr_1_dest and test1:tlr_2_dest using only one scan of the tape. database test1; create table tlr_1 ( columns ) in dbspace1; create table tlr_1_dest ( columns ); create table tlr_2 ( columns ) in dbspace1; create table tlr_2_dest ( columns ); insert into tlr_1_dest select * from tlr_1; insert into tlr_2_dest select * from tlr_2;

27. IBM Software Group 27 Distributed Restore  Extracts a table called test:source_tab from the most recent backup of dbspace1 and places the data on the database server rem_srv in the table target_dbs:tlr_1 database target_dbs; create table target_tab ( columns ); database test; create table source_tab ( columns ) in dbspace1; insert into target_dbs@rem_srv.target_tab select * from source_tab;

28. IBM Software Group 28 Agenda  What is Table Level Point in Time Restore (TLPITR)  Syntax and Semantics Content Release Phases  TLPITR Testing

29. IBM Software Group 29 Data Types Not Support in the First Release Extended Data Type LISTS MULTISET SET ROW DISTINCT OPAQUE Built-in Data Type CLOB BLOB TEXT IN BLOBSPACE BYTE IN BLOBSPACE Tables can not be restored This mean these data types can not be in any of tables being restored If these data types do appear an error will be given when processing the command file Table can be restored but the column in the table will be set to NULL Future IDS versions will support extended data types, clob, blob

30. IBM Software Group 30 Agenda  What is Table Level Point in Time Restore (TLPITR)  Syntax and Semantics  Content Release Phases TLPITR Testing

31. IBM Software Group 31 Test Cases 123...123... FullFilterSerialIndex Serial Stream - Full Table Restore Serial Stream - Partial Table Restore (Filter) Serial Stream - Table with a serial column Serial Stream - Table with index Parallel Streams - Full Table Restore

32. IBM Software Group 32 Serial Stream - Full Table Restore XPS dbspaces (dbslice) Variations on the Theme Partial Table ( where clause ) Table with Index Table with Serial Column Legato Archecker XBSA

33. IBM Software Group 33 Parallel Streams - Full Table Restore XBSA Legato Archecker XPS dbspaces (dbslice) Archecker 1 archecker for each dbspace

34. IBM Software Group 34 Serial Stream - “External Enhancement” Legato XBSA Named Pipe Archecker XPS PLOAD (dbaccess/external tables)

35. IBM Software Group 35 Serial Stream - “DevNull” Archecker Legato XBSA /dev/null

36. IBM Software Group 36 Performance

37. IBM Software Group 37 Questions