Struct tc_table::IndexSchema [−][src]
pub struct IndexSchema { /* fields omitted */ }
Expand description
The schema of a Table
index
Implementations
Return a list of the columns in this schema.
Iterate over the names of the columns in this schema.
Return a slice of the columns in this schema’s key.
Return a slice of the columns in this schema’s values.
Given a Row
, return a (key, values)
tuple.
Given a Row
, return a (key, values)
tuple.
Given a key
and values
, return a Row
.
Given a list of Value
s, return a Row
.
Return true
if this schema starts with the given slice of column names.
Return the IndexSchema
needed to index the given columns.
Return an error if this schema does not support ordering by the given columns.
Return an error if the given key does not match this schema.
Return an error if the given values do not match this schema.
Return an error if the given Row
has any extra fields or incompatible values.
Return an error if the given Row
does not have a compatible value for every column.
Trait Implementations
Cast an instance of T
into an instance of Self
.
Performs the conversion.
Performs the conversion.
Performs the conversion.
The decoding context of this type, useful in situations where the stream to be decoded may be too large to hold in main memory. Read more
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
Test if value
can be cast into Self
.
Returns Some(Self)
if the source value can be cast into Self
, otherwise None
.
fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
OnErr: FnOnce(&T) -> Err,
fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
OnErr: FnOnce(&T) -> Err,
Returns Ok(Self)
if the source value can be cast into Self
, otherwise calls on_err
.
Auto Trait Implementations
impl RefUnwindSafe for IndexSchema
impl Send for IndexSchema
impl Sync for IndexSchema
impl Unpin for IndexSchema
impl UnwindSafe for IndexSchema
Blanket Implementations
Mutably borrows from an owned value. Read more
Returns true
if self
can be cast into the target type T
.
Test if value
can be cast into Self
.
Returns Some(Self)
if the source value can be cast into Self
, otherwise None
.
fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
OnErr: FnOnce(&T) -> Err,
fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
OnErr: FnOnce(&T) -> Err,
Returns Ok(Self)
if the source value can be cast into Self
, otherwise calls on_err
.
Test if self
can be cast into T
.
Returns Some(T)
if self
can be cast into T
, otherwise None
.
fn try_cast_into<Err, OnErr>(self, on_err: OnErr) -> Result<T, Err> where
OnErr: FnOnce(&Self) -> Err,
fn try_cast_into<Err, OnErr>(self, on_err: OnErr) -> Result<T, Err> where
OnErr: FnOnce(&Self) -> Err,
Returns Ok(T)
if self
can be cast into T
, otherwise calls on_err
.