Struct Statement

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

Parameter names and values that bind to placeholders in the DML string. A parameter placeholder consists of the @ character followed by the parameter name (for example, @firstName). Parameter names can contain 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 a SQL statement with unbound parameters.

sql: Option<String>

Required. The DML string.

Trait Implementations

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 Debug for Statement

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

Formats the value using the given formatter.

impl Default for Statement

fn default() -> Statement

Returns the “default value” for a type.

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.

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 Part for Statement