SQL/MX 3.2.1 Query Guide (H06.26+, J06.15+)

SQL/MX Operators
HP NonStop SQL/MX Release 3.2.1 Query Guide—663851-003
7-70
SORT Operator
The SORT operator has one child node. The description field for this operator contains
the following:
The following is an example of the SORT operator:
PREPARE TestQuery16 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 self_referencing_update
forced_sort
sort_key ...............
inverse(DETCAT.DETSCH.SUPPLIER.S_ACCTBAL),
DETCAT.DETSCH.NATION.N_NAME,
DETCAT.DETSCH.SUPPLIER.S_NAME,
DETCAT.DETSCH.PSX1.PS_PARTKEY
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
sort_key Expression describing sort keys. expr(text)
TP663851.fm Page 70 Wednesday, January 30, 2013 5:37 PM