The KeyBound class is a regular type that represents an open or closed endpoint for a range of keys.
A range of keys is defined by a starting KeyBound and an ending KeyBound, and it logically includes all intermediate keys, optionally including/excluding the bounds.
KeyBounds can be "open", meaning the matching row will be excluded from the results, or "closed" meaning the matching row will be included. KeyBound instances should be created with the MakeKeyBoundOpen() or MakeKeyBoundClosed() factory functions.
Example
auto key_set = spanner::KeySet().AddRange(spanner::MakeKeyBoundOpen(0),
spanner::MakeKeyBoundOpen(11));
Example
auto delete_singers_range =
spanner::DeleteMutationBuilder(
"Singers", spanner::KeySet().AddRange(spanner::MakeKeyBoundClosed(3),
spanner::MakeKeyBoundOpen(5)))
.Build();
Constructors
KeyBound(KeyBound const &)
Copy and move semantics.
| Parameter | |
|---|---|
| Name | Description |
|
KeyBound const &
|
KeyBound(KeyBound &&)
Copy and move semantics.
| Parameter | |
|---|---|
| Name | Description |
|
KeyBound &&
|
KeyBound()
Not default constructible.
KeyBound(Key, Bound)
Constructs an instance with the given key and bound.
| Parameters | |
|---|---|
| Name | Description |
key |
Key
|
bound |
Bound
|
Operators
operator=(KeyBound const &)
Copy and move semantics.
| Parameter | |
|---|---|
| Name | Description |
|
KeyBound const &
|
| Returns | |
|---|---|
| Type | Description |
KeyBound & | |
operator=(KeyBound &&)
Copy and move semantics.
| Parameter | |
|---|---|
| Name | Description |
|
KeyBound &&
|
| Returns | |
|---|---|
| Type | Description |
KeyBound & | |
Functions
key() const &
Returns the Key.
| Returns | |
|---|---|
| Type | Description |
Key const & | |
key() &&
Returns the Key (by move).
| Returns | |
|---|---|
| Type | Description |
Key && | |
bound() const
Returns the Bound.
| Returns | |
|---|---|
| Type | Description |
Bound | |
google::cloud::spanner::KeyBound::Bound
An enum indicating whether the Key is included (closed) or excluded (open).