通过如下sql获取rowid切分范围
SELECT rownum || ', ' || ' rowid between ' || chr(39) ||
dbms_rowid.rowid_create(1, DOI, lo_fno, lo_block, 0) || chr(39) ||
' and ' || chr(39) ||
dbms_rowid.rowid_create(1, DOI, hi_fno, hi_block, 1000000) ||
chr(39) data
FROM (SELECT DISTINCT DOI,
grp,
first_value(relative_fno) over(PARTITION BY DOI, grp ORDER BY relative_fno, block_id rows BETWEEN unbounded preceding AND unbounded following) lo_fno,
first_value(block_id) over(PARTITION BY DOI, grp ORDER BY relative_fno, block_id rows BETWEEN unbounded preceding AND unbounded following) lo_block,
last_value(relative_fno) over(PARTITION BY DOI, grp ORDER BY relative_fno, block_id rows BETWEEN unbounded preceding AND unbounded following) hi_fno,
last_value(block_id + blocks - 1) over(PARTITION BY DOI, grp ORDER BY relative_fno, block_id rows BETWEEN unbounded preceding AND unbounded following) hi_block,
SUM(blocks) over(PARTITION BY DOI, grp) sum_blocks,
SUBOBJECT_NAME
FROM (SELECT obj.OBJECT_ID,
obj.SUBOBJECT_NAME,
obj.DATA_OBJECT_ID AS DOI,
ext.relative_fno,
ext.block_id,
SUM(blocks) over() SUM,
SUM(blocks) over(ORDER BY DATA_OBJECT_ID, relative_fno, block_id) - 0.01 sum_fno,
TRUNC((SUM(blocks) over(ORDER BY DATA_OBJECT_ID,
relative_fno,
block_id) - 0.01) /
(SUM(blocks) over() / &cnt)) grp,
ext.blocks
FROM dba_extents ext, dba_objects obj
WHERE ext.segment_name = '&object_name'
AND ext.owner = '&owner'
AND obj.owner = ext.owner
AND obj.object_name = ext.segment_name
AND obj.DATA_OBJECT_ID IS NOT NULL
ORDER BY DATA_OBJECT_ID, relative_fno, block_id)
ORDER BY DOI, grp);