Re: Better SQL performance than SUBSTRING

Always use Operations Navigator or the new Data base support in ACS to
build any SQL object. It will give you the proper syntax and everything you
need. Never create any SQL object by hand.

Here is the output of Ops Nav for an index it built for me.

/* Creating index DEVAGC549.MY_PERFORMANCE */
CREATE OR REPLACE INDEX DEVAGC549.MY_PERFORMANCE ON
DEVAGC549.PLANT_PERFORMANCE_MASTER_TEST_RESULTS (MASTER_TEST_NUMBER ASC)
WHERE Substring( ENVIRONMENT_RAN_IN, 1, 3) = 'CP1';

/* Setting system index name to PLPERM_I01 for DEVAGC549.MY_PERFORMANCE */
RENAME INDEX DEVAGC549.MY_PERFORMANCE TO SYSTEM NAME PLPERM_I01;

/* Setting label text for DEVAGC549.MY_PERFORMANCE */
LABEL ON INDEX DEVAGC549.MY_PERFORMANCE IS 'My Performance Index';


On Fri, May 4, 2018 at 11:38 AM Dan <dan27649@xxxxxxxxx> wrote:

Again, just a WAG, but I wonder if you need to explicitly name the indexed
substring. So...
(SUBSTRING(MY_COLUMN,5,6)) as KeySubstr

No idea where "AUXILIARY' came from.

- Dan

On Fri, May 4, 2018 at 2:05 PM, Justin Taylor <JUSTIN@xxxxxxxxxxxxx>
wrote:

That doesn't seem to work for me. The statement ran, but no object was
created.

Here's my statement:
create index MY_TABLE_SUBSTRING on table MY_TABLE
(SUBSTRING(MY_COLUMN,5,6))


Here's the message iACS gave me on the create:
SQL State: 01505
Vendor Code: 143
Message: [SQL0143] Statement CREATE INDEX AUXILIARY TABLE ignored. Cause

.

. . . . : Statement CREATE INDEX AUXILIARY TABLE is not supported by

DB2

for IBM i. It has been ignored. Recovery . . . : No action is
required.
Statement ran successfully, with warnings (6 ms)


IBMi 7.3, PTF's current as-of 07 Apr 18
iACS 1.1.7.3

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