Struct hdbconnect::ResultSetMetadata

pub struct ResultSetMetadata { /* private fields */ }

Metadata for the fields in a result set.

Implementations

impl ResultSetMetadata

pub fn number_of_fields(&self) -> usize

Returns the number of fields.

pub fn is_empty(&self) -> bool

Returns true if the set of fields is empty.

pub fn schemaname(&self, i: usize) -> HdbResult<&String>

Database schema of the i’th column in the resultset.

pub fn tablename(&self, i: usize) -> HdbResult<&String>

Database table of the i’th column in the resultset.

pub fn columnname(&self, i: usize) -> HdbResult<&String>

Name of the i’th column in the resultset.

pub fn displayname(&self, index: usize) -> HdbResult<&String>

Display name of the column.

pub fn is_nullable(&self, i: usize) -> HdbResult<bool>

True if column can contain NULL values.

pub fn has_default(&self, i: usize) -> HdbResult<bool>

Returns true if the column has a default value.

pub fn is_readonly(&self, i: usize) -> HdbResult<bool>

Returns true if the column is readonly.

pub fn is_auto_incremented(&self, i: usize) -> HdbResult<bool>

Returns true if the column is auto-incremented.

pub fn is_array_type(&self, i: usize) -> HdbResult<bool>

Returns true if the column is of array type.

pub fn type_id(&self, i: usize) -> HdbResult<u8>

Returns the id of the value type. See module hdbconnect::metadata::type_id.

pub fn scale(&self, i: usize) -> HdbResult<i16>

Scale length (for some numeric types only).

pub fn precision(&self, i: usize) -> HdbResult<i16>

Precision (for some numeric types only).

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 Display for ResultSetMetadata

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

Formats the value using the given formatter.