Index

• access method
  • bitmap probe
  • bitmap scan
  • buffer scan
  • create table
  • dequeue
  • encoded vector index
  • encoded vector index probe
  • encoded vector index symbol table scan
  • enqueue
  • hash table
  • hash table probe
  • hash table scan
  • list scan
  • permanent objects
  • queue
  • radix index
  • radix index probe
  • radix index scan
  • row number list probe
  • row number list scan
  • sorted list probe
  • sorted list scan
  • table probe
  • table scan
  • temporary bitmap
  • temporary buffer
  • temporary index
  • temporary index probe
  • temporary index scan
  • temporary list scan
  • temporary objects
  • temporary row number list
  • temporary sorted list
• access plan
  • validation
• access plan rebuilt
  • summary row
• advisor
  • query optimizer index
• ALLOCATE clause
  • performance implications
• allow copy data (ALWCPYDTA) parameter
• ALWCPYDTA (allow copy data) parameter
• APIs
  • statistics manager
• arrival sequence
  • qaqq3000

• bitmap
  • access method
• bitmap created
  • summary row
• bitmap merge
  • summary row
• bitmap probe
  • access method
• bitmap scan
  • access method
• blocking, SQL
  • improving performance
• blocking consideration
  • using, affect on performance
• buffer
  • scan access method

• calls, number
  • using
    • FETCH statement
• canceling a query
• change query attributes
• Change Query Attributes (CHGQRYA) command
• changing
  • query options file
• CHGQRYA (Change Query Attributes) command
• CLOSQLCSR parameter
  • using
• command
  • CHGQRYA
  • CHGQRYA command
  • QAQQINI
  • QAQQINI command
• command (CL)
  • Change Query Attributes (CHGQRYA)
  • CHGQRYA (Change Query Attributes)
  • Delete Override (DLTOVR)
  • Display Job (DSPJOB)
  • Display Journal (DSPJRN)
  • DLTOVR (Delete Override)
  • DSPJOB (Display Job)
  • DSPJRN (Display Journal)
  • Override Database File (OVRDBF) (1), (2)
  • OVRDBF (Override Database File) (1), (2)
  • Print SQL Information (PRTSQLINF) (1), (2)
  • QAQQINI
  • Start Database Monitor (STRDBMON)
  • STRDBMON (Start Database Monitor)
  • Trace Job (TRCJOB)
  • TRCJOB (Trace Job)
• commands
  • End Database Monitor (ENDDBMON)
  • Start Database Monitor (STRDBMON)
• commitment control
  • displaying
• controlling parallel processing
• copy of the data
  • using to improve performance
• CQE engine
• create table
  • access method
• cursor
  • positions
    • retaining across program call (1), (2)
    • rules for retaining
    • using to improve performance (1), (2)

• data
  • paging
    • interactively displayed to improve performance
  • selecting from multiple tables
    • affect on performance
• data path, open
• database monitor
  • end
  • examples (1), (2)
  • physical file DDS
  • SQL table
  • start
• database monitor performance rows
• database query performance
  • monitoring
• DDS
  • database monitor physical file
• definitions
  • binary radix index
  • bitmap probe access method
  • bitmap scan access method
  • buffer scan access method
  • CQE
  • dequeue access method
  • dial
  • encoded vector index
  • encoded vector index access method
  • encoded vector index probe access method
  • encoded vector index symbol table scan access method
  • enqueue access method
  • hash table probe access method
  • hash table scan access method
  • isolatable
  • list scan access method
  • miniplan
  • open data path
  • plan cache
  • primary table
  • query dispatcher
  • queue access method
  • radix index
  • radix index probe
  • radix index scan access method
  • row number list probe access method
  • row number list scan access method
  • secondary tables
  • sorted list probe access method
  • sorted list scan access method
  • SQE
  • statistics manager (1), (2)
  • symmetrical multiprocessing
  • table create
  • table probe
  • table scan
  • temporary bitmap access method
  • temporary buffer access method
  • temporary hash table
  • temporary index access method
  • temporary index probe access method
  • temporary index scan access method
  • temporary list access method
  • temporary objects
  • temporary row number list access method
  • temporary sorted list access method
  • Visual Explain
• Delete Override (DLTOVR) command
• dequeue
  • access method
• detail row
  • rows retrieved
• Display Job (DSPJOB) command
• Display Journal (DSPJRN) command
• distinct processing
  • summary row
• DSPJOB (Display Job) command

• encoded vector index
  • access method
  • creating
  • maintenance
  • recommendations
• encoded vector index probe
  • access method
• encoded vector index symbol table scan
  • access method
• End Database Monitor (ENDDBMON) command
• ENDDBMON (end database monitor) command
• enqueue
  • access method
• examples
  • database monitor (1), (2)
  • governor
  • indexes
  • performance analysis (1), (2), (3)
  • reducing the number of open database operation
  • selecting data from multiple tables

• file
  • query options

• generic query information
  • summary row (1), (2)
• governor
  • *DFT
  • *RQD
  • *SYSRPYL
  • CHGQRYA
  • JOB
  • QRYTIMLMT
  • time limit
• grouping
  • summary row (1), (2), (3)
• grouping optimization

• hash join
• hash table
  • access method
  • probe access method
  • scan access method
  • summary row
• host variable
  • qaqq3010
• host variable and ODP implementation
  • summary row

• improving performance (1), (2)
  • blocking, using
  • join queries
  • paging interactively displayed data
  • PREPARE statement
  • retaining cursor positions across program call (1), (2)
  • SELECT statements, using effectively
  • selecting data from multiple tables
  • SQL blocking
  • using
    • close SQL cursor (CLOSQLCSR) (1), (2)
    • FETCH FOR n ROWS
    • INSERT n ROWS
    • precompile options
• index
  • access method
  • and the optimizer
  • binary radix index
  • coding for effective indexes
  • comparing radix and encoded vector indexes
  • creating a strategy
  • encoded vector index
  • encoded vector index access method
  • encoded vector index maintenance
  • encoded vector index probe access method
  • encoded vector index symbol table scan access method
  • examples
  • index probe access method
  • maintenance
  • recommendations for encoded vector indexes
  • scan access method
  • statistics versus indexes
  • strategy
  • temporary
    • probe access method
    • scan access method
  • temporary access method
  • using with sort sequence
• index advisor
  • query optimizer
• index created
  • qaqq3002
  • summary row
• information messages
  • open data path (1), (2)
  • performance
• INSERT n ROWS
  • improving performance
• interactively displayed data, paging
  • affect on performance

• JOB
• join
  • hash
  • optimization
• join optimization
  • performance tips
• join order
  • optimization
• join secondary dials
  • costing

• limit, time
• list scan
  • access method
• live data
  • using to improve performance
• locks
  • analyzing
• long object names
  • performance
• look ahead predicate generation

• materialized query table
  • qaqq3030
• message
  • cause and user response
  • debug mode
  • open data path information (1), (2)
  • performance information
  • PRTSQLINF
    • viewing with iSeries Navigator
  • viewing with iSeries Navigator
• monitor (ENDDBMON) command, end database
• monitoring
  • database query performance
• multiple
  • table
    • improving performance when selecting data from

• nested loop join
• number of calls
  • using a FETCH statement
• number of open database operations
  • improving performance by reducing

• ODP implementation and host variable
  • summary row
• open
  • closing
  • determining number
  • effect on performance
  • reducing number
• open data path
  • definition
  • information messages
• OPNQRYF (Open Query File) command
• optimization
  • grouping
  • join
  • join order
  • nested loop join
• optimizer
  • operation
  • query index advisor
• optimizer information
  • qaqq3007
• optimizer timed out
  • summary row
• options, precompile
  • improving performance by using
• output
  • all queries that performed table scans
  • SQL queries that performed table scans
• Override Database File (OVRDBF) command

• paging
  • interactively displayed data
• parallel processing
  • controlling
    • in jobs (CHGQRYA command)
    • system wide (QQRYDEGREE) value
• parameters, command
  • ALWCPYDTA (allow copy data) (1), (2)
  • CLOSQLCSR (close SQL cursor) (1), (2)
• path, open data
• performance
  • information messages
  • monitoring
  • monitoring query
  • open data path messages (1), (2)
  • OPNQRYF
  • optimizing
  • tools
  • using long object names
• performance analysis
  • example 1
  • example 2
  • example 3
• performance considerations (1), (2)
• performance improvement
  • blocking, using
  • paging interactively displayed data
  • PREPARE statement
  • reducing number of open database operation
  • retaining cursor positions across program call (1), (2)
  • SELECT statements, using effectively
  • selecting data from multiple tables
  • SQL blocking
  • using copy of the data
  • using INSERT n ROWS
  • using live data
  • using precompile options
• performance rows
  • database monitor
• permanent objects
  • access method
• physical file DDS
  • database monitor
• plan cache
• precompile options
  • improving performance, using
• precompiler command
  • default (1), (2)
• precompiler parameter
  • ALWCPYDTA
  • CLOSQLCSR
• predicate
  • transitive closure
• Predictive Query Governor
• PREPARE statement
  • improving performance
• Print SQL Information (PRTSQLINF) (1), (2)
• problems
  • join query performance
• program calls
  • rules for retaining cursor positions

• qaqq3000
  • arrival sequence
• qaqq3001
  • using existing index
• qaqq3002
  • index created
• qaqq3003
  • query sort
• qaqq3004
  • temporary table
• qaqq3007
  • optimizer information
• qaqq3008
  • subquery processing
• qaqq3010
  • host variable
• qaqq3030
  • materialized query table
• QAQQINI
• QDT
• QRYTIMLMT parameter
  • CHGQRYA (Change Query Attributes) command
• query
  • canceling
• Query Definition Template (QDT)
• query dispatcher
• query engine overview
• query optimizer
  • decision-making rules
• query optimizer index advisor
  • in Visual Explain
• query options
  • file
• query options file
  • changing
• query performance
  • monitoring
• query sort
  • qaqq3003
  • summary row
• query time limit
• queue
  • scan access method

• radix index
  • access method
• radix index probe
  • access method
• radix index scan
  • access method
• reducing number of open database operations
  • improving performance, example
• Reorganize Physical File Member (RGZPFM) command
  • effect on variable-length columns
• resource
  • optimization
• retaining cursor positions
  • across program call
    • improving performance (1), (2)
  • all program calls
    • rules
• row number list probe
  • access method
• row number list scan
  • access method
• rows
  • database monitor performance
• ROWS, INSERT n
  • improving performance
• rows retrieved
  • detail row
• rule
  • retaining cursor positions
    • program calls

• SELECT statement
  • using effectively to improve performance
• selecting
  • data from multiple tables
• setting query time limit
• sort sequence
  • using indexes
• sorted list probe
  • access method
• sorted list scan
  • access method
• SQE engine
• SQL blocking
  • improving performance
• SQL information
  • summary row (1), (2)
• SQL table
  • database monitor view
• SQL view
  • database monitor
• Start Database Monitor (STRDBMON) command (1), (2)
• statements
  • FETCH
    • FOR n ROWS
    • number of calls
  • INSERT
    • n ROWS
  • PREPARE
    • improving performance
• statistics manager (1), (2)
  • APIs
  • automatic statistics collection
  • automatic statistics refresh
  • determining existence
  • manually collecting and refreshing statistics
  • monitoring background statistics collection
  • replication of column statistics
  • statistics versus indexes
  • viewing statistics requests
• STRDBMON (Start Database Monitor) command (1), (2)
• STRDBMON/ENDDBMON commands
  • summary row
• subquery merge
  • summary row
• subquery processing
  • qaqq3008
  • summary row
• summary row
  • access plan rebuilt
  • bitmap created
  • bitmap merge
  • distinct processing
  • generic query information (1), (2)
  • grouping (1), (2), (3)
  • hash table
  • host variable and ODP implementation
  • index created
  • optimizer timed out
  • query sort
  • SQL information
  • STRDBMON/ENDDBMON commands
  • subquery merge
  • subquery processing
  • table locked
  • table scan (1), (2)
  • temporary table
  • using existing index
• summary rows
  • SQL information
  • using existing index
• symmetrical multiprocessing

• table
  • multiple
    • improving performance when selecting data from
• table locked
  • summary row
• table probe
  • access method
• table scan
  • access method
  • summary row (1), (2)
• table scans
  • output for all queries
  • output for SQL queries
• temporary bitmap
  • access method
  • probe access method
  • scan access method
• temporary buffer
  • scan access method (1), (2)
• temporary index
  • access method
  • probe access method
  • scan access method
• temporary list
  • access method
• temporary list scan
  • access method
• temporary row number list
  • access method
  • probe access method
  • scan access method
• temporary sorted list
  • access method
  • probe access method
  • scan access method
• temporary table
  • qaqq3004
  • summary row
• tools
  • performance
• Trace Job (TRCJOB) command
• transitive closure

• using
  • a copy of the data (1), (2)
  • allow copy data (ALWCPYDTA) (1), (2)
  • close SQL cursor (CLOSQLCSR) (1), (2)
  • FETCH statement
• using existing index
  • qaqq3001
  • summary row (1), (2)
• using JOB parameter
• using SQL
  • application programs

• variable-length data
  • tips
• Visual Explain
  • index advisor
  • starting