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<p class=MsoNormal><span style='color:#1F497D'>So you want output like this?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>res_note
for snapshot_id = 14 is dodgy.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>pos=55
char=0x03<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>pos=103
char=0x04<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>pos=11999
char=0x00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>res_note
for snapshot_id = 28 is dodgy.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Text processing in the database.
yuk.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Do you have the option of extracting
the matching records to a file then do the grunt work with text processing
tools?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Paul<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> info-ingres-bounces@lists.planetingres.org
[mailto:info-ingres-bounces@lists.planetingres.org] <b>On Behalf Of </b>Martin
Bowes<br>
<b>Sent:</b> Friday, 31 August 2018 8:41 PM<br>
<b>To:</b> info-ingres@lists.planetingres.org<br>
<b>Subject:</b> [Info-ingres] More similar to<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-GB>Hi All,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>I just knew this non printing character
stuff was going to come back and bite me…<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>I can identify the rows with non printing
characters excluding \t, \r and \n.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Now I need to find which characters are
being objected to on each row. I may need to know their position as well.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>The data in question is a long varchar. But
(fortunately) the longest item is under 12000 characters, so we are under the
32000 char varchar conversion limit.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>The easiest way I can think of doing this
is to do it in a database procedure…<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>create
procedure identify_bad_char<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>as
declare<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
snapshot_id integer4 not null not default;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
res_note long varchar not null not default;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
msgid integer4 not null not default;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
msg varchar(256) not null not
default;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>begin<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
msgid = 0;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
FOR SELECT snapshot_id, res_note INTO :snapshot_id, :res_note<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
FROM basket_snapshot<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
WHERE res_note SIMILAR TO '%[^' + x'09' + x'0a' + x'0d' + '[:print:]]%'<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
DO<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
msgid = msgid + 1;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
msg = 'res_note for snapshot_id = ' + varchar(:snapshot_id) + ' is dodgy.';<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
message :msgid :msg;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
/* Insert manic while loop here and process the line character by character */<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>
ENDFOR;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'>end;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Before I start coding up the manic while
loop … does anyone have a suggestion as to how I can do this more
efficiently.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>The data was probably added to a web form
via a cut and paste from a word document, so we’ve picked up things like
smart quotes. Hence we may ultimately be interested in replacing multi
character sequences with simple ansi equivalents. I have a suspicion a clean()
function is galloping in my direction.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Martin Bowes</span><span lang=EN-GB
style='font-family:"Courier New"'><o:p></o:p></span></p>
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