QIn X++, what is the purpose of the like relational operator, and which of the following statements about its usage is correct?
Question Info
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Explanation
In X++, the like relational operator is used to compare patterns in strings. It works similarly to SQL's LIKE clause. Here's a breakdown of why option D is correct:
✔️ like Operator Behavior:
-
It returns true if the first expression (
expression1) matches the pattern provided in the second expression (expression2). -
The second expression can contain wildcards:
-
*(asterisk) → matches zero or more characters. -
?(question mark) → matches exactly one character.
-
📝 Example:
select * from xRefPaths where xRefPaths.Path like "\\\\Classes\\\\AddressSelectForm";
-
This will select records where the
Pathfield matches the string\\Classes\\AddressSelectForm.
🔒 Important Notes:
-
likeis evaluated by the SQL Server backend, not directly in X++.-
So results may vary depending on the SQL collation or case-sensitivity of the server.
-
-
expression2must not exceed 1000 characters. -
When matching file paths, each
\must be written as\\(because\is an escape character), so you need four backslashes:\\\\.
❌ Why other options are incorrect:
-
A: The
likeoperator is not used for numeric equality. -
B:
*matches zero or more characters, and?matches one character — this option got the meanings reversed. -
C: Since
likeis processed by SQL, its results may vary across environments — especially if SQL settings differ.
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