Thank you Birgitta,
I use your solution for my request :
WITH TB_INDEXSTAT AS(
SELECT INDEX_SCHEMA, INDEX_NAME, INDEX_TYPE, NUMBER_KEY_COLUMNS, COLUMN_NAMES
FROM QSYS2.SYSPARTITIONINDEXSTAT
WHERE TABLE_SCHEMA = 'my_schema'
AND TABLE_NAME = 'my_table'
AND INDEX_NAME = 'my_index'
)
SELECT A.INDEX_SCHEMA, A.INDEX_NAME, A.INDEX_TYPE, A.NUMBER_KEY_COLUMNS,
B.ORDINAL_POSITION AS KEY_NUMBER, B.ELEMENT AS KEY_FILED
FROM TB_INDEXSTAT A
CROSS JOIN TABLE(SYSTOOLS.SPLIT(A.COLUMN_NAMES, ', ')) B
ORDER BY B.ORDINAL_POSITION;
It's perfect...
But do you know where can i find the sort key information (ASCENDING or DESCENDING) ?
Thank's you
#SQL