You have a 0 / 1 column indexed? That goes against recommendations. You're
only supposed to index columns that have a lot of variability. That would be
like indexing the word "the" in the back of a book. Because "the" appears so
many times, it's faster to go word by word in the book than to flip back and
forth between finding a location in the index and then going to the value. If
you do an RBDefine of the table and click on the index, look at the Duplication
Factor. A value of 1 means that values in the column are unique and make a
good candidate for an index. The higher the number, the more "inefficient" the
index is.
I'm with you -- since 99% of the time I'm interested in just the date portion
of a DateTime, and it's a pain to always have to do a DEXTRACT on it, I usually
split them into two columns also. I've never indexed a DateTime
Karen
On Friday, June 20, 2025 at 11:48:45 AM CDT, 'Daniel Goldberg' via RBASE-L
<[email protected]> wrote:
Sorry did not see the original email. Guess I needed to start from the
beginning lol
I have a column called “prted” with integer of 0(default) or 1 in my table to
specify if the item has been printed. When indexed works fast and takes little
space. So I am doing similar to what Karen says.
A little off topic but in my experience using datetime column types(even
indexed) are slow with large datasets. I usually create two columns, one for
date and one for time.
Dan Goldberg
From: 'Karen Tellef' via RBASE-L <[email protected]>
Sent: Friday, June 20, 2025 7:58 AM
To: 'Daniel Goldberg' via RBASE-L <[email protected]>
Subject: Re: [EXTERNAL] Re: [RBASE-L] - Speeding up SELECT WHERE ColName IS NULL
But you're missing Doug's problem, Dan. In order to populate the temp table,
he would have to say "where Datecol is null", because those are the records
that haven't been printed yet. And Doug is saying that the "is null" is really
slow
Karen
On Friday, June 20, 2025 at 09:53:20 AM CDT, 'Daniel Goldberg' via RBASE-L
<[email protected]> wrote:
For my warehouse team, i create a temp table, open a form, and they double
click or type in the part#s they want to print. Then the labels print based on
the temp table.
No extra columns for your permanent tables and super fast.
Dan Goldberg
From:[email protected] <[email protected]>On Behalf Of Doug
Hamilton
Sent: Friday, June 20, 2025 7:46 AM
To: [email protected]
Subject: [EXTERNAL] Re: [RBASE-L] - Speeding up SELECT WHERE ColName IS NULL
That would work, Buddy. Remember this column is not indexed, so the questions
becomes:
What SELECTs multiple rows faster - a specific value or a null value?
Which is what Nicky's approach was asking.
Doug
On 6/18/2025 4:30 PM, 'Buddy Walker' via RBASE-L wrote:
Doug
What I have done in the past was set the default value to some off the date
like 12/31/1899 then print your labels where the date = 12/31/1899
Buddy
Sent from my iPhone
On Jun 18, 2025, at 4:41 PM, 'Karen Tellef' via RBASE-L
<[email protected]> wrote:
Nick: His LabelsPrintedDTS field is a DATETIME or DATE, as far as I can tell
Karen
On Wednesday, June 18, 2025 at 03:36:00 PM CDT, 'Nicky Avery' via
RBASE-L<[email protected]> wrote:
On Wednesday, June 18, 2025 at 02:31:55 PM CDT, Doug
Hamilton<[email protected]> wrote:
Labels to be printed are selected WHERE LabelsPrintedDTS IS NULL.
Doug, when you create a new order, had you tried assigning a default value of 0
to LabelsPrintedDTS rather than no value? Once printed, you can change it to 1.
This way you search on ... WHERE LabelsPrintedDTS = 0 rather than NULL.
Nicky
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