W dniu 30.07.2021 o 17:33, Paul Gilmartin pisze:
On Fri, 30 Jul 2021 09:54:51 -0500, Mike Schwab wrote:
Try 5 pairs of conditions?
INCLUDE COND=((5,4,CH,EQ,C'0205',AND,83,3,CH,EQ,C'YES'),
OR,(5,4,CH,EQ,C'0205',AND,88,3,CH,EQ,C'YES'),
OR,(5,4,CH,EQ,C'0205',AND,93,3,CH,EQ,C'YES'),
OR,(5,4,CH,EQ,C'0205',AND,98,3,CH,EQ,C'YES'),
OR,(5,4,CH,EQ,C'0102',AND,28,7,CH,NE,C'USE '))
What's DFSORT's operator precedence? Was it necessary to bracket the
conjunctions in order that they have higher precedence than
the alternations?
Are you just rewriting Radoslaw's expression according to the
Distributive Law?
Does DFSORTT not recognize the Distributive Law?
1. Operator precedence. According to documentation AND is first.
However parenthesis should change it and it is allow to use as many
parenthesis as needed.
2. DFSORT should recognize the law (Rozdzielność działań in Polish)
3. I found another mystery, which seems to be APARable:
The following statement gives several test records as expected:
INCLUDE COND=(5,4,CH,EQ,C'0205',AND,(83,3,CH,EQ,C'YES',OR,
88,3,CH,EQ,C'YES',OR,
93,3,CH,EQ,C'YES',OR,
98,3,CH,EQ,C'YES'))
But this statement gives zero records. Note, I added "OR" conditions,
so it cannot narrow the output.
INCLUDE COND=(5,4,CH,EQ,C'0205',AND,(83,3,CH,EQ,C'YES',OR,
88,3,CH,EQ,C'YES',OR,
93,3,CH,EQ,C'YES',OR,
99,3,CH,EQ,C'YES',OR,
103,3,CH,EQ,C'YES',OR,
113,3,CH,EQ,C'YES'))
