Joshua wrote:
Hello,
I am new to this list and have been working with PostgreSQL since January.
Here is my problem, I hope someone here has some experience or can point
me in the right direction. I am writing the following query for a C#
program I am writing:
SELECT 'PV.LINEITEM:' || partnum || ',' || round(onhand) || ',' ||
round(qm5) || ',' || round(lsm4) || ',' || ',' || ',' || round(onorder)
|| ',' || ',' || ',' || binone || ',' || ',' || round(backorderqty) ||
',' || ',' || round(onhold) || ',' || ',' || ',' || ',' || ',' || ',' ||
',' || round(qtyperjob) || ',' || round(ordermax) AS gmrim FROM slparts
WHERE vendor LIKE 'CH%'
The query does work and I am getting results from the database. There
are values for all 'partnum' in the database, however, the query results
include blank fields here and there in between the returned records. Why
am I receiving blank fields for 'gmrim'???? This absolutely defies logic
and I cannot find any rhyme or reason for this problem. I cannot have
any blank rows in the query, and again the database is completely
populated with values.
I'm not sure it is - I think you've got a NULL somewhere.
Since NULL means "unknown" ('text' || NULL) = NULL
Wrap all your column-references in COALESCE: e.g. COALESCE(partnum,'')
and see if that solves it. If so, go back and find rows WHERE partnum IS
NULL and correct them. Then set the NOT NULL constraint on the relevant
columns.
--
Richard Huxton
Archonet Ltd
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
