Struct Mutation

pub struct Mutation {
    pub delete: Option<Delete>,
    pub insert: Option<Write>,
    pub insert_or_update: Option<Write>,
    pub replace: Option<Write>,
    pub update: Option<Write>,
}

A modification to one or more Cloud Spanner rows. Mutations can be applied to a Cloud Spanner database by sending them in a Commit call.

This type is not used in any activity, and only used as part of another schema.

Fields

delete: Option<Delete>

Delete rows from a table. Succeeds whether or not the named rows were present.

insert: Option<Write>

Insert new rows in a table. If any of the rows already exist, the write or transaction fails with error ALREADY_EXISTS.

insert_or_update: Option<Write>

Like insert, except that if the row already exists, then its column values are overwritten with the ones provided. Any column values not explicitly written are preserved. When using insert_or_update, just as when using insert, all NOT NULL columns in the table must be given a value. This holds true even when the row already exists and will therefore actually be updated.

replace: Option<Write>

Like insert, except that if the row already exists, it is deleted, and the column values provided are inserted instead. Unlike insert_or_update, this means any values not explicitly written become NULL. In an interleaved table, if you create the child table with the ON DELETE CASCADE annotation, then replacing a parent row also deletes the child rows. Otherwise, you must delete the child rows before you replace the parent row.

update: Option<Write>

Update existing rows in a table. If any of the rows does not already exist, the transaction fails with error NOT_FOUND.

Trait Implementations

impl Clone for Mutation

fn clone(&self) -> Mutation

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Mutation

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Mutation

fn default() -> Mutation

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Mutation

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Mutation

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Part for Mutation