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Using quotes in scenProc

davepfs

davepfs

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7
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hungary
Something I discovered today is that filters don't like using single quotes for string literal in scenProc. So something like

Code: 
CreateXMLLibObj|FROMFILE="streets_pt_res.shp" AND class=6 AND bridge='F' AND osmlayer=0|{FB7F83BB-88FF-4632-A521-8DD27FA6230F}|heading|0|7.0|0.9|NOCRASH;NOSHADOW|

in my script "failed" silently - it didn't give an error but gave me no objects returned where I expected lots.

Changing the single quote bridge='F' to double quote bridge="F" worked as expected.

It's a minor inconvenience becuase I'm transplanting SQL from ogr2ogr into scenProc and it turns out I can't be too lazy with my copy and pastes.

It did make me wonder how literal quotes work in scenProc : e.g. if you wish to check for a double quote would you write it like this: """ or '"' or "\"" ? I haven't tried it yet but I'm hoping I can get a "quote" from Arno :)

Only mention in the scenProc manual about quotes is page 18.
 
arno

arno

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Staff member
FSDevConf team
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32,885
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netherlands
Hi,

I would have to check how the library that does the filter logic supports this, but I never encountered any attribute values that actually contain quotes. I think that would be a rare thing.
 
davepfs

davepfs

Messages
7
Country
hungary
It's not really so much the check for a quote, more my surprise that a single quote didn't have the same effect as a double quote. The fact the parser silently ignored it made me wonder if it was treating it as a variable. That's really the bit I'd like to know more about!
 
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