Struct ResultSetMetadata

pub struct ResultSetMetadata {
    pub row_type: Option<StructType>,
    pub transaction: Option<Transaction>,
    pub undeclared_parameters: Option<StructType>,
}

Metadata about a ResultSet or PartialResultSet.

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

Fields

row_type: Option<StructType>

Indicates the field names and types for the rows in the result set. For example, a SQL query like "SELECT UserId, UserName FROM Users" could return a row_type value like: “fields”: [ { “name”: “UserId”, “type”: { “code”: “INT64” } }, { “name”: “UserName”, “type”: { “code”: “STRING” } }, ]

transaction: Option<Transaction>

If the read or SQL query began a transaction as a side-effect, the information about the new transaction is yielded here.

undeclared_parameters: Option<StructType>

A SQL query can be parameterized. In PLAN mode, these parameters can be undeclared. This indicates the field names and types for those undeclared parameters in the SQL query. For example, a SQL query like "SELECT * FROM Users where UserId = @userId and UserName = @userName " could return a undeclared_parameters value like: “fields”: [ { “name”: “UserId”, “type”: { “code”: “INT64” } }, { “name”: “UserName”, “type”: { “code”: “STRING” } }, ]

Trait Implementations

impl Clone for ResultSetMetadata

fn clone(&self) -> ResultSetMetadata

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ResultSetMetadata

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

Formats the value using the given formatter.

impl Default for ResultSetMetadata

fn default() -> ResultSetMetadata

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ResultSetMetadata

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ResultSetMetadata

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 ResultSetMetadata