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IT20585: SQL0901N WITH UNEXPECTED AVGBUILDTUPLESIZE=0 IN JOIN QUERY

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APAR status

  • Closed as program error.

Error description

  • DB2 may produce 901 with unexpected avgBuildTupleSize=0 when
    following conditions are satisfied:
    1. The query has one or more complex joins.
    2. There are join columns of type
    char/varchar/graphic/vargraphic with length < 4.
    
    2017-04-13-13.21.40.392077+540 E724316423A2800      LEVEL: Info
    (Origin)
    PID     : 12345                TID : 70349177680304 PROC :
    db2sysc 0
    INSTANCE: db2inst1             NODE : 000           DB   :
    SAMPLE
    APPHDL  : 0-51707              APPID:
    *LOCAL.db2inst1.170413041909
    AUTHID  : DB2INST1             HOSTNAME: db2server
    EDUID   : 37277                EDUNAME: db2agent (SAMPLE) 0
    FUNCTION: DB2 UDB, SW- common services, sqlnn_cmpl, probe:650
    MESSAGE : ZRC=0x803100AF=-2144272209=SQLNN_E_BADNEWS
              "unexpected error but state is OK"
    DATA #1 : String, 62 bytes
    An unexpected error was detected during statement compilation.
    DATA #2 : Boolean, 1 bytes
    true
    DATA #3 : Boolean, 1 bytes
    false
    DATA #4 : Boolean, 1 bytes
    true
    DATA #5 : Boolean, 1 bytes
    false
    DATA #6 : Hex integer, 4 bytes
    0x00000000
    DATA #7 : SQLCA, PD_DB2_TYPE_SQLCA, 136 bytes
    sqlcaid : SQLCA     sqlcabc: 136   sqlcode: -901   sqlerrml: 30
    sqlerrmc: unexpected avgBuildTupleSize=0
    sqlerrp : SQLNG060
    sqlerrd : (1) 0x801A006D      (2) 0x00000000      (3) 0x00000000
               (4) 0x00000744      (5) 0xFFFFF866      (6)
    0x00000000
    sqlwarn : (1)      (2)      (3)      (4)        (5)       (6)
               (7)      (8)      (9)      (10)        (11)
    sqlstate:
    DATA #8 : Hex integer, 4 bytes
    0x00000040
    DATA #9 : String with size, 1000 bytes
    SELECT * FROM ..(snip)...
    DATA #10: String, 435 bytes
    Compiler error stack for rc = -2144272209:
    sqlnn_cmpl[415]
    sqlng_main[3024]
    sqlng_main[1707]
    sqlng_build_thread[890]
    sqlngProcessLolepop[550]
    sqlng_process_return_op[1652]
    sqlngProcessLolepop[550]
    sqlng_process_pipe_op[889]
    sqlngProcessLolepop[550]
    sqlng_process_mate_op[1504]
    sqlngProcessLolepop[550]
    sqlng_process_pipe_op[889]
    sqlngProcessLolepop[550]
    sqlng_process_mate_op[1504]
    sqlngProcessLolepop[550]
    sqlng_process_hsjn_op[1946]
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to Db2 11.1 Mod 4 Fixpack 4 or higher                *
    ****************************************************************
    

Problem conclusion

  • First fixed in Db2 11.1 Mod 4 Fixpack 4
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT20585

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-05-14

  • Closed date

    2020-01-28

  • Last modified date

    2020-01-28

  • APAR is sysrouted FROM one or more of the following:

    IT20559

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSEPGG","label":"DB2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
28 January 2020