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TRANSCRIPT
Db2 Data Access with PHP on IBM i
Mike Pavlak – IT Strategist
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Agenda
￭ Fundamentals
￭ DB2 Improvements
￭ Default Connection
￭ PHP options for *LIBL
￭ ibm_db2.ini
￭ Column Heading
￭ Featured Functions
￭ Data Cache in action
DB2 & PHP: Fundamentals
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php.net
￭ Home base of all functions
▶Descriptions
▶Examples
▶Notes
￭ All functions
￭ All options
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YoungiProfessionals.com
￭ DB2 Connections:
￭ http://yips.idevcloud.com/wiki/index.php/PHP/DB2Documents
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What’s the name of your database?
￭ Helpful in iASP situation and best practice
￭ Probably your system name but not necessarily, can be changed HOT
￭ Can connect to remote IBM i for no extra charge
DB2 & PHP: Improvements
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You must be able to answer these
￭ What version of the Operating System are we running?
￭ What technology Refresh is installed?
￭ DSPPTF
￭ WRKPTFGRP
￭ Pres F11
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V5R4
￭ Automatic Index Advisor
￭ Plan cache
￭ Show Indexes and MQT
￭ RANK(), ROW_NUMBER(), LIKE, LOB,
￭ Recursion
￭ 2MB SQL Statements
￭ Free format RPG & SQL
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i6.1
￭ VALUES in from clause
￭ FETCH FIRST and ORDR BY in Subselect
￭ Full OUTER join
￭ SQE Learning Optimizer
￭ RPG Variable scoping at procedure level
￭ SQL Syntax highlighting in RDi
￭ DB2 Data Studio
￭ DB2 Web Query updates
￭ Business Intelligence
▶Super Groups
▶CUBE
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i7.1 (April 13, 2010)
￭ Technology Refresh
￭ XML Data Type
￭ Column Level Ecryption
￭ Adaptive Query Processing
￭ SQE meets CQE
￭ Encoded Vector Indexes
￭ Technology Refresh 4
▶XMLTABLE, Three part name support
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i7.1/7.2
￭ Technology Refresh 5
▶ iNav DB Enhanced UI,
￭ Technology Refresh 6 & 7
▶ SQL Index to 1.7TB, Live table/Index move to SSD
￭ Technology Refresh 8
▶ GENERATE_SQL(), Performance Enhancements
￭ Technology Refresh 9, 7.2 TR1
▶ Pipelined Table Functions, RegEX, Faster iASP Vary On
￭ Technology Refresh 10, 7.2 TR2
▶ REPLACE table, JSON, CPU & I/O averages on Show statements
￭ Technology Refresh 11, 7.2 TR3
▶ SQL ILE & ILE RPG Sync, SQE Enhancements
DB2 & PHP: Default Connection
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Shipped defaults
￭ Look at Samples…
￭ *LOCAL – when you really aren’t sure
￭ Zero length string for USER & PASSWORD
￭ Options parameter is optional.
￭ This is Anonymous
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Default User profile
￭ Runs as QTMHHTTP
￭ Can be disabled…
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Connection Error
￭ Disabled profile…IBM i security enforced!
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Hardcoded library
￭ Library in SQL statement
￭ All rows retrieved as arrays
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Which retrieval method?
￭ Difference is column names in index
￭ Benchmarks via Z-Ray on micro-partition
DB2_fetch_array()21 ms
DB2_fetch_assoc()24 ms
DB2_fetch_both()39 ms
DB2 & PHP: options for *LIBL
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Option parameter of DB2_Connect
￭ Options parameter is an array.
￭ Supports three kinds if library list
▶i5_lib – Single library
▶i5_naming – Enable library list via user profile
▶i5_libl – Specify library list in PHP
￭ Supports many other parameters
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Single library approach
￭ Similar to the world of MySQL/MariaDB.
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Multiple libraries hardcoded in PHP
￭ More like real life
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Job Description – PHPUSER2
￭ WRKJOBD, DSPJOBD
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Multiple libraries via User Profile
￭ Parallels Green Screen access
DB2 & PHP: ibm_db2.ini
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php.ini
￭ File in IFS:
￭ Zend Server Admin GUI port 10081 or 10091
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Block anonymous
￭ Samples shipped usually work
￭ Default setting is “ON”
￭ Default profile is QTMHHTTP
￭ Change requires restart of Zend Server PHP
DB2 & PHP: Column Heading
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Column Heading Text
￭ Column names are nice, but…
￭ Column heading and text are not available via functions in the DB2 Extension.
￭ Table qsys2/syscolumns contains these values
￭ Retrieve them when needed
￭ Build function to add to application set
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gettableColumns
DB2 & PHP: Featured Functions
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db2_xxxx()
￭ Over 50 functions that make up the DB2 extension for PHP.
￭ Worth the time to review each
￭ We’ll talk about a few interesting ones.
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db2_pconnect()
￭ Creates connection that is reusable over multiple page requests.
￭ Saves the time of opening and closing the job
￭ Same parameters as db2_connect()
￭ First request sets everything up
￭ Subsequent request from user will reuse job.
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Column(Field) Information
￭ Many detail about each column can be obtained
￭ Must have valid result set.
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Auto Increment Field
￭ Create the table
￭ Insert the row
￭ Retrieve the unique ID
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Auto Increment Field
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Securityis no laughing matter
￭ Security is better and this helps!
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Frist, filter your inputs
￭ Developer is agent of security in web app design
￭ Filter inputs (Frameworks do this but so does PHP!)
￭ JavaScript may do this, but PHP should, too
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Understand which “exec” to use
￭ DB2_Exec
▶Fire and forget
▶Use when no parameters necessary
● $sql = “select * from sp_cust”
￭ DB2_Execute
▶Prepared SQL via DB2_Prepare & DB2 bind
▶Always use when using parameters
▶Example in Samples
● $sql = “select * from sp_cust where custno = $customerNumber”
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Prepared SQL
￭ SQL statement has “?” for placeholder
￭ db2_prepare
￭ db2_bind_param
￭ db2_execute
DB2 & PHP: Featured Functions
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Data Cache
￭ Green screen lookup window vs. drop down
￭ Data Cache (Zend or APC) saves data in memory
￭ Performance
￭ White paper
￭ Better performance for frequently access lists
￭ Less stress on DB2
￭ Aggregate values (BI)
￭ Look at examples…
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Standard DB2 Call
￭ 350+ Customer Orders
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DB2 Call with Data Cache
