Error result when text content is C1,C2....
weishengkui opened this issue · comments
CONTENT:
worthless C1 adjective
worthwhile B2 adjective
worthy C1 adjective
would B1 modal verb
q -t 'select count(distinct(c1)) from CEFR.txt where c2 = "C1"'
result:
0
wow, that's an interesting bug... thanks for reporting it. I'll take a deeper look
Hi, sorry for the late reply.
The reason that the query returns 0 as the result is due to the fact that the string literal C1 is double-quoted and not single-quoted. In sqlite (the underlying engine/syntax of q), double-quoted strings are treated as identifiers (e.g. column names in this case), and not as string literals, which means that the original example query essentially compared between the value of column c2 to the value of column c1, returning an empty set.
Running the same query with single-quotes returns the correct results.
$ q -t "select count(distinct(c1)) from CEFR.txt where c2 = 'C1'"
2
I've changed the wrapping of the entire query to double-quotes as well in this query, to prevent the need escape the single-quotes.
Hope that helps
Harel
@weishengkui - Can you update whether or not this fixed your issue?