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@@ -553,7 +553,7 @@ class Category implements GradebookItem
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$sql .= " AND course_code = '".Database::escape_string($course_code)."'"
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." AND session_id = ".(int)$session_id;
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} else {
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- $sql .= " AND course_code = '".Database::escape_string($course_code)."'";
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+ $sql .= " AND course_code = '".Database::escape_string($course_code)."' AND session_id is null OR session_id=0";
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}
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} else {
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//no optional parameter, proceed as usual
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