SQL/MX 3.x Query Guide (H06.22+, J06.11+)

SQL/MX Operators
HP NonStop SQL/MX Query Guide—640323-001
7-69
SORT_SCALAR_AGGR Operator
SORT_SCALAR_AGGR Operator
Groupby Group
The SORT_SCALAR_AGGR operator occurs for aggregates without a GROUP BY
clause. It returns one row. The description field for this operator contains:
The following is an example of the SORT_SCALAR_AGGR operator:
PREPARE TestQuery18 FROM
SELECT s_acctbal, s_name, n_name, p_partkey, p_mfgr, s_address,
s_phone, s_comment
FROM part,supplier,partsupp, nation, region
WHERE p_partkey = ps_partkey
AND s_suppkey = ps_suppkey
AND p_size = 15
AND p_type like '%BRASS'
AND s_nationkey = n_nationkey
AND n_regionkey = r_regionkey
AND r_name = 'EUROPE'
AND ps_supplycost = (SELECT MIN(ps_supplycost)
FROM partsupp ps1,supplier s1, nation n1,region r1
WHERE p_partkey = ps1.ps_partkey
AND s1.s_suppkey = ps1.ps_suppkey
AND s1.s_nationkey = n1.n_nationkey
AND n1.n_regionkey = r1.r_regionkey
AND r1.r_name = 'EUROPE')
ORDER BY s_acctbal desc, n_name, s_name, p_partkey;
DESCRIPTION
fragment_id ............ 0
parent_frag ............ (none)
fragment_type .......... master
aggregates .............
min(DETCAT.DETSCH.PARTSUPP.PS_SUPPLYCOST)
selection_predicates ... (DETCAT.DETSCH.PSX1.PS_SUPPLYCOST =
min(DETCAT.DETSCH.PARTSUPP.PS_SUPPLYCOST))
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 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_predicates Expression of the HAVING clause. expr(text)