IBM Systems Tecdhnical University

Transcription

What’s New in DB2 for i 7.2
© Copyright IBM Corporation 2015
Technical University/Symposia materials may not be reproduced in whole or in part without the prior written permission of IBM.
9.0
DB2 for i Strategy
• Simplicity
• Integration
• Robust scalability
• Trusted security & availability
• Strategic solutions with open standards
Linda M Swan
DB2 for i SQE Optimizer Team
IBM
Application Development Advancements
 SQL Routine Enhancements
–Constants
–Autonomous procedures
–Enhanced Debug*
–Pipelined table functions*
 Trigger Obfuscation
 Compatibility with DB2 Family & Oracle
–Timestamp precision
–Regular expressions*
–Truncate statement
–Function parameter defaults
–Transfer Ownership statement
 Linux ODBC driver*
 JDBC & .NET enhancements**
Improved Security & Reliability
 RCAC
 Separation of duties
 Remote Journal SSL
 Deferred Journal Restore*
 Journal viewer*
Enhanced Performance & Scalability
 Plan Cache self-management*
 Enhanced I/O Costing
 1.7 TB Indexes*
 Reuse Deleted Rows VLDB awareness*
 Enhanced storage management for LOB
& Variable-length & LOB columns*
Simplified Management
 Enhanced Plan Cache Metrics &
Controls*
 Generate SQL – improved DDS
conversion*
 Health Center System Limits tracking*
 Dynamic Compound statement*
 DB2 for i Services**
* - Also available on IBM i 7.1
** - Also available on IBM i 6.1 & 7.1
ibm.com/developerworks/ibmi/techupdates/db2
Application Development
Enhancements
DB2 for i 7.2 Enhancements
• IBM i Client Access drivers & providers (ODBC, ADO.NET, OLE DB)
– New offering for Windows middleware: IBM i Access Client Solutions Windows
Application Package*
– New Linux ODBC driver: IBM i Access Client Solutions Linux Application Package*
– IBM i Access Client Solutions consolidates the most commonly used tasks for managing
your IBM i into one simplified location.
• SQL CLI
– Timestamp precision support
• Toolbox JDBC
–
–
–
–
Timestamp precision support
QueryTimeoutMechanism connection attribute
Faster blocked inserts*
JTLite for mobile devices*
• Native JDBC Driver
– Timestamp precision support
• DB2 Connect 10.5 (includes ADO.NET provider, JDBC, & ODBC support)
– *SYS naming support + additional DB2 for i connection attributes*
– Add-in support for Visual Studio 2013*
– Entity framework support**
Procedural SQL Enhancements
• Parameter defaults
• Routine constants
• Obfuscation
• Simplified management of Routines with CL commands
(MOVOBJ, RNMOBJ, CPYLIB, CRTDUPOBJ)*
• Enhanced debug capabilities for SQL routines*
– Single-step capability
– Direct SQL variable evaluations: EVAL %%VarName
• Trigger enhancements
– Multi-action triggers*
– Alter Trigger statement for Enable/Disable
• UDF enhancements
– ARRAY parameter support
– Function resolution casting rules
– Pipelined table functions*
• Autonomous procedures
Middleware enhancements
• Defaults can be used to minimize code changes when new parameters
are added to an existing routine
– Parameters can be omitted from invocation when default value defined
– Parameters may be specified in any order by specifying the parameter
name in the call
– Support:
• SQL & External user-defined functions
• SQL & External stored procedures*
CREATE FUNCTION New_Prescription (
drugName CHAR(40),
prescID INTEGER DEFAULT (VALUES(NEXT VALUE FOR idSequence)),
refils INTEGER DEFAULT 0) ...
Omitting parameters – defaults
used
New_Prescription(‘Accutane')
Using a named parameter
New_Prescription(‘Accutane',
Refils=>3)
Routine constants
• Provides variables that are guaranteed not to change
– Prevent accidental assignments
– Prevent value from being changed in debugger session
CREATE PROCEDURE Increase_Credit (
ClientID CHAR(8),
CreditAmnt DECIMAL(8,2))
LANGUAGE SQL
BEGIN
DECLARE max_allowed DECIMAL(8,2) CONSTANT 75000;
IF CreditAmnt > max_allowed THEN
SIGNAL SQLSTATE 38001
SET MESSAGE_TEXT = 'Request exceeds maximum limit';
END IF;
...
Parameter defaults
Obfuscation
– By default, DB2 catalog stores routine source code for anyone to see –
intellectual asset exposure for software providers
– With obfuscation, routine source code can be masked for Triggers, Stored
Procedures*, and User-Defined Functions*
– Two methods:
 WRAP function: Generate obfuscated version of CREATE statement to run on
customer system
VALUES( SYSIBMADM.WRAP (‘CREATE PROCEDURE chgSalary(IN empno CHAR(6))
LANGUAGE SQL BEGIN UPDATE employee SET empsal = empsal*(1 + .05*empjobtype)
WHERE empid = empno; END’) );
CREATE PROCEDURE chgSalary ( IN EMPNO CHAR (6)) WRAPPED QSQ07010
aacxW8plW8FjG8pnG8VzG8FD68Fj68:Hl8:dY_pB2qpdW8pdW8pdW_praqebaqebaGEMj_vs
PBs5bOJUUqnHVayEl_ogAlGWqz2jJCIE1dQEjt33hd5Sps5cYGViD1urv7vGKeOcC4CwpCibb
 CREATE_WRAPPED procedure – create obfuscated version of routine
CALL SYSIBMADM.CREATE_WRAPPED (‘
CREATE PROCEDURE chgSalary(IN empno CHAR(6)) LANGUAGE SQL BEGIN
UPDATE employee SET empsal = empsal*(1 + .05*empjobtype)
WHERE empid = empno; END’);
Multi-action SQL Triggers*
• A single SQL Trigger can be created to handle multiple database
operations
 Enables centralization of all trigger logic
 Can be used to simplify management and installation of triggers
CREATE TRIGGER employee_monitor
AFTER INSERT OR DELETE OR UPDATE OF salary
ON employee
REFERENCING NEW AS n OLD AS o
FOR EACH ROW
BEGIN
IF INSERTING THEN
UPDATE company_stats SET nbremp=nbremp + 1;
END IF;
IF DELETING THEN
UPDATE company_stats SET nbremp=nbremp - 1;
END IF;
IF UPDATING AND (n.salary > 1.1 * o.salary)
THEN SIGNAL SQLSTATE '75000'
SET MESSAGE_TEXT = 'Salary increase > 10%'
END IF;
END
• Enables the body of SQL routine to be protected
• Enables a stored procedure’s database changes to be executed
independently of the calling application
 Without Autonomy, Commit/Rollback includes database changes made
by calling application
 DB2 automatically issues Commit/Rollback for autonomous procedure
CREATE PROCEDURE update_agency(IN agencyVID INTEGER,
IN agencyNUM INTEGER, IN agencyID INTEGER, IN agentNID)
LANGUAGE SQL
AUTONOMOUS
BEGIN
UPDATE agency
SET agency_vid=agencyVID, agency_num=agencyNUM,
agent_NID=agentNID, updated_date=CURRENT_TIMESTAMP
WHERE agency_ID = agencyID;
INSERT INTO agency_log
VALUES(USER, CURRENT_TIMESTAMP, agencyVID, agencyNUM,
agentNID);
END
Pipelined SQL Table Functions*
• More flexibility for SQL UDTFs
– Same flexibility offered by External UDTF with simpler coding
– Returned data no longer limited to a single SELECT statement
• Ability to handle errors & warnings
• Ability to customize join behavior
• Auditing/logging of individual rows returned
CREATE FUNCTION getPatients(i_code VARCHAR(3))
RETURNS TABLE(pID CHAR(6), treatDate DATE)
LANGUAGE SQL
MODIFIES SQL DATA
DETERMINISTIC
NOT FENCED
EXTERNAL ACTION CARDINALITY 500
BEGIN
FOR cur1 CURSOR FOR
SELECT pID, treatDate FROM patient, treatment
WHERE pID= treatPID AND treatCode=UPPER(i_code)
DO
INSERT INTO audit_patient_access
VALUES(pID, USER, CURRENT TIMESTAMP);
PIPE(pID, treatDate);
END FOR;
RETURN;
END
Autonomous Procedures
• Timestamp precision controls
CREATE TABLE tstab(tscol1 TIMESTAMP(0),tscol2 TIMESTAMP(12))
• RPAD & LPAD functions* (right/left pad string functions)
• Regular expressions*
• Check Constraint violation controls
…CHECK(row_status IN ('A', 'I')
ON INSERT VIOLATION SET row_status=DEFAULT
ON UPDATE VIOLATION PRESERVE row_status)
• Expressions in PREPARE & EXECUTE IMMEDIATE
• HTTP functions for integration with REST & SOAP web services*
https://ibm.biz/BdD24s
• Built-in global variables
Regular Expressions*
• Delivers powerful pattern matching search capability to SQL
– Regular expression patterns like those supported by grep, awk, etc.
– Much richer expressions than LIKE predicate
– Searches are not indexed like IBM OmniFind searches
• Example: Identity phone numbers that don’t match (123) 123-1234 format
(111-555-2222, (111)555-2222, …)
SELECT custID, custPhone FROM customer
WHERE NOT
REGEXP_LIKE(custPhone,'\([0-9]{3}\) [0-9]{3}-[0-9]{4}')
REGEXP_LIKE
Predicate that searches for expression pattern in string
REGEXP_COUNT
Returns count of occurrences of expression pattern
REGEXP_INSTR
Returns start or end position of matched substring
REGEXP_SUBSTR
Returns occurrence of substring that matches pattern
REGEXP_REPLACE
Returns modified version of source string where matched
pattern occurrences replaced with the replacement string
Additional App Development Enhancements
• Can be referenced like user-defined variables to take an action based
on a job’s current environment
–
–
–
–
Located in SYSIBM
Read-only, maintained by system
Easy to access current value with SELECT INTO or VALUES statements
Useful for RCAC definitions, Triggers, and More
Variable Name
Schema
Data Type
Size
JOB_NAME
QSYS2
VARCHAR
28
SERVER_MODE_JOB_NAME
QSYS2
VARCHAR
28
CLIENT_IPADDR
SYSIBM
VARCHAR
128
CLIENT_HOST
SYSIBM
VARCHAR
255
CLIENT_PORT
SYSIBM
INTEGER
-
ROUTINE_SPECIFIC_NAME
SYSIBM
VARCHAR
128
ROUTINE_SCHEMA
SYSIBM
VARCHAR
128
ROUTINE_TYPE
SYSIBM
CHAR
1
PACKAGE_NAME
SYSIBM
VARCHAR
128
PACKAGE_SCHEMA
SYSIBM
VARCHAR
128
PACKAGE_VERSION
SYSIBM
VARCHAR
64
SQL Development Tools
• Application development
– Rational Developer for i
– Data Studio (free download – SQL procedures & functions)
 Report writing – DB2 Web Query
– Rich set of graphical data
presentation formats
– Simplifies report management
Built-In Global Variables
Separation of Duties
• Greater emphasis on separation of duties across IT functions
– Restrict the amount of power held by one individual
– Restrict IT Security personnel from having the ability to both control data
access and perform data access
• New security administration function usage (QIBM_DB_SECADM) enables
security personnel to be limited to just controlling data access
– Example: Security Administration Function User can grant SELECT privilege
on table, but cannot read the contents of the table
– Interface: CHGFCNUSG FCNID(QIBM_DB_SECADM) USER(SECUSR) USAGE(*ALLOWED)
– Considerations:
• Security Administrator can only grant data access to others, not themselves
• Only QSECOFR or another security administrator can add users to the
security administrator function usage
• Existing grant privilege requirements (Object Owner, Object Management, or
*ALLOBJ special authority) also still apply
• Security Administrator function usage complements function usage IDs
created for System i Navigator: QIBM_DB_SYSMON & QIBM_DB_SQLADM
Security
Enhancements
Table
Access: ALL or NOTHING
• No easy way to restrict access to a specific set of rows or values
within a column
• Government regulations and corporate policies aggressively
pushing IT to restrict user/application access to sensitive data
A Solution….
Row and Column Access Control (RCAC)
What is RCAC?
• Additional layer of data security
available with DB2
• Complementary to table
level security
• Subsetting access to only the
required data for a task
• Controls access to a table at the
row, column, or both
• Two sets of rules
– Permissions for rows
– Masks for columns
• Delivered with IBM Advanced
Data Security for i feature
– No-charge feature, option 47
– Required on development &
production systems
The Business Problem…
• Currently, data access is restricted with
application logic or views
• Users with direct access to DB2 objects
can bypass these layers
– Example: Users with *ALLOBJ
authority can still view all data
• DB2 RCAC enables all data access
(SQL, CL, native record-level, etc.)
be controlled at row/column level
How can we ensure
that managers only
see data for their
own employees?
User with
*ALLOBJ access
to
– Set up rich security policies
– Prevents security administrators
authority from accessing all data in a
database
– No dependency on application logic
– Allows for data masking (column)
– Facilitates table level multi-tenancy
Scenario: Healthcare Insurance Industry
How can we ensure
that a social security
number column is
masked out for
unauthorized users?
Why Use RCAC?
• Scenario has the following permissions attached
1
2
3
– Patients
•
Can only access their own data
– Physicians
•
Can only access their own patients’ data
– Membership officers, Accounting, Drug researchers
•
Can access all data
– Nobody else sees any data
Scenario: Create Permission
1
2
3
CREATE PERMISSION access_to_row ON patient
FOR ROWS WHERE
(
VERIFY_GROUP_FOR_USER(SESSION_USER,’PATIENT’) = 1
AND patient.userid = SESSION_USER
)
OR
(
VERIFY_GROUP_FOR_USER (SESSION_USER,’PCP’) = 1
AND patient.pcp_id = SESSION_USER
)
OR
(
VERIFY_GROUP_FOR_USER (SESSION_USER,’MEMBERSHIP’) = 1
OR
VERIFY_GROUP_FOR_USER (SESSION_USER,’ACCOUNTING’) = 1
OR
VERIFY_GROUP_FOR_USER(SESSION_USER,’RESEARCH’)=1
)
ENFORCED FOR ALL ACCESS
ENABLE;
ALTER TABLE patient ACTIVATE ROW ACCESS CONTROL;
Scenario: Create Permission
UPDATE patient SET pharmacy = ‘codeine’ WHERE name=‘Sam’
PID
USERID
NAME
ADDRESS
PHARMACY
ACCT_BALANCE
PCP_ID
123 551 234
MAX
Max
First St.
hypertension
89.70
LEE
123 589 812
MIKE
Mike
Long St.
diabetics
8.30
JAMES
123 119 856
SAM
Sam
Big St.
codeine
12.50
LEE
123 191 454
DOUG
Doug
Good St.
influenza
7.68
JAMES
123 456 789
BOB
Bob
123 Some St.
hypertension
9.00
LEE
Successful UPDATE statement!
Scenario: Update Table with Permissions
UPDATE patient SET pharmacy = ‘codeine’ WHERE name=‘Doug’
PID
USERID
NAME
ADDRESS
PHARMACY
ACCT_BALANCE
PCP_ID
123 551 234
MAX
Max
First St.
hypertension
89.70
LEE
123 589 812
MIKE
Mike
Long St.
diabetics
8.30
JAMES
123 119 856
SAM
Sam
Big St.
codeine
12.50
LEE
123 191 454
DOUG
Doug
Good St.
influenza
7.68
JAMES
123 456 789
BOB
Bob
123 Some St.
hypertension
9.00
LEE
• Unsuccessful UPDATE statement
– Row not found for UPDATE
– SQLSTATE=02000, SQLCODE=100
• If you cannot view a row, you cannot update (or add) the row either
Scenario: Update Table with Permissions
SELECT * FROM patient
PID
USERID
NAME
ADDRESS
PHARMACY
ACCT_BALANCE
PCP_ID
123 551 234
MAX
Max
First St.
hypertension
89.70
LEE
123 119 856
SAM
Sam
Big St.
codeine
12.50
LEE
123 456 789
BOB
Bob
123 Some St.
hypertension
9.00
LEE
• Row Access Control
– Doctors can only see the data of their own patients
Scenario: Select from Table with Permission
PID
USERID
NAME
ADDRESS
PHARMACY
ACCT_BALANCE
PCP_ID
123 551 234
MAX
Max
First St.
hypertension
89.70
LEE
123 589 812
MIKE
Mike
Long St.
diabetics
8.30
JAMES
123 119 856
SAM
Sam
Big St.
codeine
12.50
LEE
123 191 454
DOUG
Doug
Good St.
influenza
7.68
JAMES
123 456 789
BOB
Bob
123 Some St.
hypertension
9.00
LEE
– Accounting, drug researchers and membership officers can see all data
Scenario: Select from Table with Permission
• Scenario has the following permission attached
– PID number column
• Patients can see full Patient ID number
• Everyone else sees ‘XXX XXX ‘ + last three digits of PID
CREATE MASK pid_mask ON patient FOR
COLUMN pid RETURN
CASE
WHEN
VERIFY_GROUP_FOR_USER(SESSION_USER,‘PATIENT’) = 1
THEN pid
ELSE
‘XXX XXX ‘ || SUBSTR(pid, 8, 3)
END
ENABLE;
ALTER TABLE patient ACTIVATE COLUMN ACCESS CONTROL;
Scenario: Select from Table with Mask
PID
USERID
NAME
ADDRESS
PHARMACY
ACCT_BALANCE
PCP_ID
XXX XXX 234
MAX
Max
First St.
hypertension
89.70
LEE
XXX XXX 856
SAM
Sam
Big St.
codeine
12.50
LEE
XXX XXX 789
BOB
Bob
123 Some St.
hypertension
9.00
LEE
• Column Access Control
– Doctors cannot see PID numbers
– Doctors can only see the rows of their own patients
Scenario: Create Column Mask
PID
USERID
NAME
ADDRESS
PHARMACY
ACCT_BALANCE
PCP_ID
123 456 789
BOB
Bob
123 Some St.
hypertension
9.00
LEE
• Column Access Control
– Patients can see PID numbers
– Patients can only see their own data
RCAC Considerations
• Only those users with security administration function usage
(QIBM_DB_SECADM) are allowed to add RCAC rules to a table
• RCAC rules stored in the table object
• Access control rules automatically applied to SQL Views that reference
an RCAC table
• UDFs and Triggers must be altered to specify the SECURED option
once RCAC rules added to associated table
• Native query interfaces (OPNQRYF, RUNQRY, etc.) may return
slightly different results
• Following interfaces will NOT work when referencing table with RCAC
rules
– Multi-format logical files
– Tables with Read Triggers
– File/query specifying ICU 2.6.1 sort sequence
Scenario: Select from Table with Mask
• TRANSFER OWNERSHIP statement – SQL equivalent of CHGOBJOWN
TRANSFER OWNERSHIP OF TABLE testlib.orders
TO USER newpgmr PRESERVE PRIVILEGES
• GROUP and USER keywords for more accurate security implementation
– GRANT ALL ON sales_tab TO USER frank
– GRANT ALL ON sales_tab TO GROUP marketing
• CURRENT_USER special register
– Returns adopted user profile for program’s that adopt authority
– When multiple user profiles have been adopted, most recently adopted
profile is returned
• New HOSTVAR(*SECURE)* parameter to prevent Database Monitor
from capturing sensitive data values used in comparisons
Manageability
Enhancements
Additional security enhancements
• System i Navigator improvements
• Performance Data Investigator – new
DB2 reports & perspectives
• SQL scripting with Dynamic Compound
statements
• TRUNCATE statement
• SQL Package Management
• DB2 for i Services
• Availability & Recovery enhancements
Graphical management - System i Navigator Enhancements
Performance Tools




Improved Plan Cache metrics & controls*
Exact Plan Cache filtering for advised indexes*
Enhanced monitor comparison*
Rich format reports – charts & graphs*
Management Tools






Generate SQL – enhanced DDS conversion*
SQL routines single-step debug*
Obfuscation integration*
Saving of stored procedure result sets*
Enhanced journal entry analysis*
Health Center
– System limits*
Manageability Enhancements
• New controls*
– Maximum size for
automatic sizing
– Hit Ratio
– Number of longest runs
for a statement
Generate SQL – Enhanced DDS conversion
 New options for converting
keyed LFs & PFs to SQL*
– Generate index
– Generate view & index
 Programmatic interface –
GENERATE_SQL procedure*
Plan Cache – Enhanced Metrics & Controls
Performance Data Investigator (PDI)
• Updated DB2 performance reports & perspectives
• PDI available through IBM Navigator for i browser client
Health Center – System limits analysis
What are the choices?
IBM System i Navigator
IBM Navigator for i
Where does it run?
Windows PC Install
Browser
Served from IBM i 6.1 and forward
Interface similarities
Most features are identical,
including TR enhancements
Most features are identical, including
TR enhancements
Interface differences
Run SQL Scripts
Visual Explain
Time-based performance metrics for
SQL(PDI)
OmniFind external object collection
administration
Latest functionality
Apply latest IBM i Access for
Windows 7.1 service pack
Apply latest IBM HTTP SERVER for i
Group PTF
Launch URL: https://<ibmi>:2005/ibm/console/logon.jsp
SQL Scripting with Dynamic Compound Statement*
• Dynamic Compound Statement provides ability to have rich SQL
scripting language for database setup & management
– Conditional logic & error handling
– Input values with Global Variables
– Without creating a SQL routine – on the fly execution
BEGIN
DECLARE CONTINUE HANDLER FOR SQLSTATE '42704'
BEGIN /* Table may or may not already exist*/
INSERT INTO error_log
VALUES(SESSION_USER, CURRENT TIMESTAMP, '42704');
END;
IF SESSION_USER <> ' DBADMIN' THEN
SIGNAL SQLSTATE '38001' SET MESSAGE_TEXT='Unauthorized User';
END IF;
IF Setuplib.Create_Var=‘YES’ THEN
DROP TABLE orders;
CREATE TABLE orders(ordID CHAR(6), ordQty INTEGER, ordCustID CHAR(5));
END IF;
END;
Browser client – IBM Navigator for i
• Easy to integrate with CL programs
– RUNSQL & RUNSQLSTM CL commands
– Usage of Global Variables requires ILE CL programs
PGM PARM(&CRTMOD)
DCL &CRTMOD TYPE(*CHAR) LEN(10)
DCL &SQLSTMT TYPE(*CHAR) LEN(256)
CHGVAR VAR(&SQLSTMT) +
VALUE('SET SETUPLIB.CREATE_VAR = '''|| &CRTMOD||'''' )
RUNSQL SQL(&SQLSTMT) NAMING(*SQL)
/* DBCREATE contains Dynamic Compound Statement Source */
RUNSQLSTM SRCFILE(SETUPLIB/SRC) SRCMBR(DBCREATE)
NAMING(*SQL)
ENDPGM
Additional Management Enhancements
• TRUNCATE statement
– Delete all rows from a table
– Additional configuration options:
•
•
•
Prevent if Delete Triggers exist of ignoring
Reuse storage instead of dropping
Restart Identity column instead of continuing
• Improved Identity column management with RESTART_IDENTITY utility*
• Simplified SQL package management with SYSPACKAGESTAT view*
• Queued exclusive locks for ALTER TABLE, LOCK TABLE, and RENAME
TABLE (QAQQINI option: PREVENT_ADDITONAL_CONFLICTING_LOCKS)
• DB2 for i – Services**
– Provide easy SQL-based access to retrieve system information (security,
storage, work management, etc.)
– Utilities to perform DB2 administrative & management tasks
SQL Scripting with Dynamic Compound Statement*
SELECT user_name, usage, user_type FROM qsys2.function_usage
WHERE function_id = ‘QIBM_SQL_SECADM’
SELECT bucket_current_size "Current Temp Storage",
bucket_peak_size "Peak Temp Storage", job_number
FROM qsys2.systmpstg
WHERE job_status = '*ACTIVE' ORDER BY bucket_current_size DESC
DB2 for i Services
 Complete listing found on IBM i developerWorks: https://ibm.biz/DB2Services
 Service objects found in QSYS2, unless otherwise noted
• System Services
–
–
–
–
–
–
–
–
–
SYSTEM_VALUE_INFO
GET_JOB_INFO, JOBLOG_INFO
PTF_INFO, GROUP_PTF_INFO
GROUP_PTF_CURRENCY(SYSTOOLS)
TCP_INFO
SYSDISKSTAT
USER_STORAGE
ENV_SYS_INFO(SYSIBMADM)
SYSLIMITS
• Security Services
–
–
–
–
–
 Performance Services
FUNCTION_INFO
FUNCTION_USAGE
USER_INFO
GROUP_PROFILE_ENTRIES
SQL_CHECK_AUTHORITY
–
–
–
–
–
–
–
DUMP_PLAN_CACHE
DUMP_PLAN_CACHE_TopN
DUMP_PLAN_CACHE_PROPERTIES
EXTRACT_STATEMENTS
RESET_TABLE_INDEX_STATISTICS
HARVEST_INDEX_ADVICE (SYSTOOLS)
ACT_ON_INDEX_ADVICE (SYSTOOLS)
DB2 for i Services - Examples
• SSL support for Remote Journal
• Deferred processing for Journal Restores*
– Journaling automatically started once dependent journal restored
– Extends V6R1 support delivered for Indexes & Views that DFRID
parameter & RSTDFROBJ command
• Journal viewer – data & audit journals
– Programmatic interface**: DISPLAY_JOURNAL table function
https://ibm.biz/BdD8U6
– Graphical viewer* - Navigator clients
Availability & Recovery Enhancements
• Graphical Journal entry viewer:
– Filtering & ordering
– Customize columns displayed from journal entry
Availability & Recovery Enhancements
Performance & Scalability Enhancements
• SQL Query Engine(SQE) Enhancements
– In-Memory Database: Tables & Indexes
• KEEP IN MEMORY clause
• CHGPF/CHGLF parameter*
–
–
–
–
Enhanced I/O Costing & IN list processing
Plan Cache Size recall on IPL**
Auto Adjust Plan Cache Sizing*
Native Query support
• Enhanced Scalability
–
–
–
–
–
–
–
1.7 Terabyte Indexes*
Live movement of DB2 objects to SSDs**
Row movement between table partitions
Reuse Deleted Rows algorithm VLDB awareness*
Improved storage management for Variable-length & LOB columns*
Simplified blocking with OVERRIDE_TABLE procedure**
ALTER TABLE performance improvements**
Performance & Scalability
Enhancements
• By default, SQE now attempts to process native queries
(OPNQRYF, RUNQRY, etc.) and native opens of SQL views
– Traditional native queries will be taking a new code path
– Testing & benchmarking highly recommended
• Users might want to change value of the SQE_NATIVE_ACCESS
QAQQINI option to *NO due to the following reasons:
– Different results may be returned
•
•
•
•
•
•
•
Results in different order
Different values for null columns or columns with errors
Suppression of some mapping error messages
Loss of RRN positioning capabilities
Duplicate key processing behavior differences
Missing key feedback
Larger open feedback record counts
• … (reference 7.2 Memo To Users for complete details)
– Creation of new indexes to tune performance of native queries
– SQE Plan Cache contention with SQL workloads
In-Memory Database Enablement
• Boost performance of SQL & analytic workloads by further exploiting
your investments in memory
– Leverage tight integration between DB2 for i & operating system
– Identify key table & index objects
– DB2 manages memory for tagged objects using advanced parallel
techniques
• In-Memory attribute only honored for SQL interfaces
• SQL Interface – 7.2 support
– KEEP IN MEMORY clause
•
•
CREATE statements
ALTER TABLE statement
• CL interface - starting with 7.1
– KEEPINMEM parameter
•
•
CHGPF command
CHGLF command
SQE Native Query Support
 DB2 for i Websites
– Home Page:
ibm.com/systems/i/db2
– Technology Updates:
ibm.com/developerworks/ibmi/techupdates/db2
– Blog
db2foriblogspot.com
– Porting Zone:
ibm.com/partnerworld/i/db2porting
 Forums and Education resoures
– DB2: https://ibm.biz/db2iforum
– IBM i: https://www.ibm.com/developerworks/forums/forum.jspa?forumID=2675
– ibm.com/systems/power/software/i/db2/gettingstarted.html
– ibm.com/partnerworld/wps/training/i5os/courses
 DB2 for i Publications
– White Papers:
ibm.com/partnerworld/wps/whitepaper/i5os
– Online Manuals: ibm.biz/db2iBooks
– DB2 for i Redbooks (ibm.biz/db2iRedbooks)
• Getting Started with DB2 Web Query for System i (SG24-7214)
• OnDemand SQL Performance Analysis … in V5R4 (SG24-7326)
• Preparing for and Tuning the SQL Query Engine on DB2 for i (SG24-6598)
• Modernizing IBM i Applications from the Database Up (SG24-8185)
• IBM i 7.1 Technology Overview with Technology Refresh Updates (updated
12/2014)
Continue growing your IBM skills
career
all
ibm.com/training provides a
comprehensive portfolio of skills and
accelerators that are designed to meet
your training needs.
• Training in cities local to you - where and
when you need it, and in the format you want
– Use IBM Training Search to locate public training classes
near to you with our five Global Training Providers
– Private training is also available with our Global Training Providers
• Demanding a high standard of quality –
view the paths to success
– Browse Training Paths and Certifications to find the
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• If you can’t find the training that is right for you with
our Global Training Providers, we can help.
– Contact IBM Training at dpmc@us.ibm.com
Global Skills Initiative
54
© Copyright IBM Corporation
2015
Additional Information

IBM Systems Tecdhnical University

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