SQL/MX 2.x Query Guide (H06.04+, J06.03+)

SQL/MX Operators
HP NonStop SQL/MX Query Guide—540437-005
7-67
SORT_PARTIAL_GROUPBY_ROOT Operator
where int64_6 IN (0,2,4,5)
group by int64_6;
DESCRIPTION
fragment_id ............ 2
parent_frag ............ 0
fragment_type .......... dp2
grouping_columns ....... DETCAT.DETSCH.PTAB09.INT64_6
aggregates .............. count(1 )
SORT_PARTIAL_GROUPBY_ROOT Operator
Groupby Group
The SORT_PARTIAL_GROUPBY_ROOT operator works together as a pair with the
SORT_PARTIAL_GROUPBY_LEAF operator. The
SORT_PARTIAL_GROUPBY_ROOT operator finalizes the group by at the ESP level.
The SORT_PARTIAL_GROUPBY_ROOT operator has one child node. The description
field for this operator contains:
The example of the SORT_PARTIAL_GROUPBY_ROOT operator is based on:
control query shape
sort_groupby(partition_access(sort_groupby(scan)));
prepare TestQuery33 from
select int64_6,count(*)
from PTAB09
where int64_6 IN (0,2,4,5)
group by int64_6;
DESCRIPTION
fragment_id ............ 0
parent_frag ............ (none)
fragment_type .......... master
Token Followed by ... Data Type
fragment_id A sequential number assigned to the fragment. 0
is always the master executor and 1 is reserved
for the EXPLAIN plan. Numbers 2 to n will be
ESP or DAM fragments.
integer
parent_frag The fragment_id for the parent fragment of the
current fragment. The value is (none) for the
master executor.
integer
fragment_type Master, ESP, or DP2. text
aggregates Expression of the aggregate function. expr(text)
selection_predicate Expression of the HAVING clause. expr(text)
grouping_columns Expression of the grouping columns. expr(text)