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@ -62,7 +62,11 @@ pub trait Cursor<'txn> { |
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/// duplicate data items of each key will be returned before moving on to
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/// the next key.
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fn iter_from<K>(&mut self, key: K) -> Iter<'txn> where K: AsRef<[u8]> { |
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self.get(Some(key.as_ref()), None, ffi::MDB_SET_RANGE).unwrap(); |
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match self.get(Some(key.as_ref()), None, ffi::MDB_SET_RANGE) { |
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Err(Error::NotFound) => Ok(()), |
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Err(error) => Err(error), |
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Ok(_) => Ok(()), |
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}.unwrap(); |
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Iter::new(self.cursor(), ffi::MDB_GET_CURRENT, ffi::MDB_NEXT) |
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} |
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@ -83,7 +87,11 @@ pub trait Cursor<'txn> { |
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/// Iterate over duplicate items in the database starting from the given
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/// key. Each item will be returned as an iterator of its duplicates.
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fn iter_dup_from<K>(&mut self, key: &K) -> IterDup<'txn> where K: AsRef<[u8]> { |
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self.get(Some(key.as_ref()), None, ffi::MDB_SET_RANGE).unwrap(); |
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match self.get(Some(key.as_ref()), None, ffi::MDB_SET_RANGE) { |
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Err(Error::NotFound) => Ok(()), |
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Err(error) => Err(error), |
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Ok(_) => Ok(()), |
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}.unwrap(); |
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IterDup::new(self.cursor(), ffi::MDB_GET_CURRENT) |
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} |
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@ -424,7 +432,8 @@ mod test { |
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let items: Vec<(&[u8], &[u8])> = vec!((b"key1", b"val1"), |
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(b"key2", b"val2"), |
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(b"key3", b"val3")); |
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(b"key3", b"val3"), |
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(b"key5", b"val5")); |
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{ |
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let mut txn = env.begin_rw_txn().unwrap(); |
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@ -446,6 +455,12 @@ mod test { |
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assert_eq!(items.clone().into_iter().skip(1).collect::<Vec<_>>(), |
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cursor.iter_from(b"key2").collect::<Vec<_>>()); |
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assert_eq!(items.clone().into_iter().skip(3).collect::<Vec<_>>(), |
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cursor.iter_from(b"key4").collect::<Vec<_>>()); |
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assert_eq!(vec!().into_iter().collect::<Vec<(&[u8], &[u8])>>(), |
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cursor.iter_from(b"key6").collect::<Vec<_>>()); |
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} |
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#[test] |
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@ -462,7 +477,10 @@ mod test { |
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(b"b", b"3"), |
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(b"c", b"1"), |
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(b"c", b"2"), |
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(b"c", b"3")); |
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(b"c", b"3"), |
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(b"e", b"1"), |
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(b"e", b"2"), |
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(b"e", b"3")); |
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{ |
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let mut txn = env.begin_rw_txn().unwrap(); |
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@ -489,6 +507,12 @@ mod test { |
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assert_eq!(items.clone().into_iter().skip(3).collect::<Vec<(&[u8], &[u8])>>(), |
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cursor.iter_dup_from(b"ab").flat_map(|x| x).collect::<Vec<_>>()); |
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assert_eq!(items.clone().into_iter().skip(9).collect::<Vec<(&[u8], &[u8])>>(), |
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cursor.iter_dup_from(b"d").flat_map(|x| x).collect::<Vec<_>>()); |
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assert_eq!(vec!().into_iter().collect::<Vec<(&[u8], &[u8])>>(), |
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cursor.iter_dup_from(b"f").flat_map(|x| x).collect::<Vec<_>>()); |
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assert_eq!(items.clone().into_iter().skip(3).take(3).collect::<Vec<(&[u8], &[u8])>>(), |
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cursor.iter_dup_of(b"b").unwrap().collect::<Vec<_>>()); |
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