Struct google_spanner1::Statement

pub struct Statement {
    pub param_types: Option<HashMap<String, Type>>,
    pub params: Option<HashMap<String, String>>,
    pub sql: Option<String>,
}

A single DML statement.

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

Fields

param_types: Option<HashMap<String, Type>>

It is not always possible for Cloud Spanner to infer the right SQL type from a JSON value. For example, values of type BYTES and values of type STRING both appear in params as JSON strings.

In these cases, param_types can be used to specify the exact SQL type for some or all of the SQL statement parameters. See the definition of Type for more information about SQL types.

params: Option<HashMap<String, String>>

The DML string can contain parameter placeholders. A parameter placeholder consists of '@' followed by the parameter name. Parameter names consist of any combination of letters, numbers, and underscores.

Parameters can appear anywhere that a literal value is expected. The same parameter name can be used more than once, for example: "WHERE id > @msg_id AND id < @msg_id + 100"

It is an error to execute an SQL statement with unbound parameters.

Parameter values are specified using params, which is a JSON object whose keys are parameter names, and whose values are the corresponding parameter values.

sql: Option<String>

Required. The DML string.

Trait Implementations

impl Part for Statement

impl Clone for Statement

fn clone(&self) -> Statement

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for Statement

fn default() -> Statement

Returns the "default value" for a type.

impl Debug for Statement

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

Formats the value using the given formatter.

impl Serialize for Statement

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

Serialize this value into the given Serde serializer.

impl<'de> Deserialize<'de> for Statement

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.