'exists' and 'not' can only have a single child beneath it. use
'and'/'or' to nested multiple CEs.
Mark
Olenin, Vladimir (MOH) wrote:
Hi,
I've run across one thing. If I evaluate two columns within 'exists'
statement it throws compilation error if I don't connect two columns
with 'and':
Exists (
Column (...)
Column (...)
)
With 'and' everything compiles OK:
Exists (
Column (...) and
Column (...)
)
Which is correct? Or probably both are not correct? >From the 3.1M
release notes I can suggest there is another syntax (which works as well):
Exists (
Column (...) and
Exists Column (...)
)
I thought #1 should work OK.... I'm not sure what #2 might mean for
DROOLS. From the rules & data I'm processing and results I'm getting
it seems like it works as #1 should, ie, checking existence of the
tuple represented by the columns within the 'exists' block....
Thanks,
Vlad
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