Struct ResultSetMetadata 

pub struct ResultSetMetadata { /* private fields */ }

Metadata about a ResultSet.

Example

let client = Spanner::builder().build().await?;
let db = client.database_client("projects/p/instances/i/databases/d").build().await?;
let tx = db.single_use().build();
let mut rs = tx.execute_query(Statement::builder("SELECT 1 AS Number").build()).await?;

let metadata = rs.metadata().expect("metadata available");

for (name, type_) in metadata.column_names().iter().zip(metadata.column_types().iter()) {
    println!("Column: {} has type: {:?}", name, type_.code());
}

Implementations

impl ResultSetMetadata

pub fn column_names(&self) -> &[String]

Returns the names of the columns in the result set.

pub fn column_types(&self) -> &[Type]

Returns the types of the columns in the result set.

pub fn undeclared_parameters(&self) -> &BTreeMap<String, Type>

Returns the types of the undeclared parameters in the result set.

Trait Implementations

impl Clone for ResultSetMetadata

fn clone(&self) -> ResultSetMetadata

Returns a duplicate 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 PartialEq for ResultSetMetadata

fn eq(&self, other: &ResultSetMetadata) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ResultSetMetadata