Struct OptFlags

pub struct OptFlags(/* private fields */);

Allowed optimizations.

Implementations

impl OptFlags

pub const PROJECTION_PUSHDOWN: OptFlags = _

Only read columns that are used later in the query.

pub const PREDICATE_PUSHDOWN: OptFlags = _

Apply predicates/filters as early as possible.

pub const CLUSTER_WITH_COLUMNS: OptFlags = _

Cluster sequential with_columns calls to independent calls.

pub const TYPE_COERCION: OptFlags = _

Run many type coercion optimization rules until fixed point.

pub const SIMPLIFY_EXPR: OptFlags = _

Run many expression optimization rules until fixed point.

pub const FILE_CACHING: OptFlags = _

Cache file reads.

pub const SLICE_PUSHDOWN: OptFlags = _

Pushdown slices/limits.

pub const COMM_SUBPLAN_ELIM: OptFlags = _

Run common-subplan-elimination. This elides duplicate plans and caches their outputs.

pub const COMM_SUBEXPR_ELIM: OptFlags = _

Run common-subexpression-elimination. This elides duplicate expressions and caches their outputs.

pub const STREAMING: OptFlags = _

Run nodes that are capably of doing so on the streaming engine.

pub const NEW_STREAMING: OptFlags = _

pub const EAGER: OptFlags = _

Run every node eagerly. This turns off multi-node optimizations.

pub const ROW_ESTIMATE: OptFlags = _

Try to estimate the number of rows so that joins can determine which side to keep in memory.

pub const FAST_PROJECTION: OptFlags = _

Replace simple projections with a faster inlined projection that skips the expression engine.

pub const COLLAPSE_JOINS: OptFlags = _

Collapse slower joins with filters into faster joins.

impl OptFlags

pub const fn empty() -> OptFlags

Get a flags value with all bits unset.

pub const fn all() -> OptFlags

Get a flags value with all known bits set.

pub const fn bits(&self) -> u32

Get the underlying bits value.

The returned value is exactly the bits set in this flags value.

pub const fn from_bits(bits: u32) -> Option<OptFlags>

Convert from a bits value.

This method will return None if any unknown bits are set.

pub const fn from_bits_truncate(bits: u32) -> OptFlags

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: u32) -> OptFlags

Convert from a bits value exactly.

pub fn from_name(name: &str) -> Option<OptFlags>

Get a flags value with the bits of a flag with the given name set.

This method will return None if name is empty or doesn’t correspond to any named flag.

pub const fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

pub const fn intersects(&self, other: OptFlags) -> bool

Whether any set bits in a source flags value are also set in a target flags value.

pub const fn contains(&self, other: OptFlags) -> bool

Whether all set bits in a source flags value are also set in a target flags value.

pub fn insert(&mut self, other: OptFlags)

The bitwise or (|) of the bits in two flags values.

pub fn remove(&mut self, other: OptFlags)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. remove won’t truncate other, but the ! operator will.

pub fn toggle(&mut self, other: OptFlags)

The bitwise exclusive-or (^) of the bits in two flags values.

pub fn set(&mut self, other: OptFlags, value: bool)

Call insert when value is true or remove when value is false.

pub const fn intersection(self, other: OptFlags) -> OptFlags

The bitwise and (&) of the bits in two flags values.

pub const fn union(self, other: OptFlags) -> OptFlags

The bitwise or (|) of the bits in two flags values.

pub const fn difference(self, other: OptFlags) -> OptFlags

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

pub const fn symmetric_difference(self, other: OptFlags) -> OptFlags

The bitwise exclusive-or (^) of the bits in two flags values.

pub const fn complement(self) -> OptFlags

The bitwise negation (!) of the bits in a flags value, truncating the result.

impl OptFlags

pub const fn iter(&self) -> Iter<OptFlags>

Yield a set of contained flags values.

Each yielded flags value will correspond to a defined named flag. Any unknown bits will be yielded together as a final flags value.

pub const fn iter_names(&self) -> IterNames<OptFlags>

Yield a set of contained named flags values.

This method is like iter, except only yields bits in contained named flags. Any unknown bits, or bits not corresponding to a contained flag will not be yielded.

impl OptFlags

pub fn schema_only() -> OptFlags

Trait Implementations

impl Binary for OptFlags

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

Formats the value using the given formatter.

impl BitAnd for OptFlags

fn bitand(self, other: OptFlags) -> OptFlags

The bitwise and (&) of the bits in two flags values.

type Output = OptFlags

The resulting type after applying the & operator.

impl BitAndAssign for OptFlags

fn bitand_assign(&mut self, other: OptFlags)

The bitwise and (&) of the bits in two flags values.

impl BitOr for OptFlags

fn bitor(self, other: OptFlags) -> OptFlags

The bitwise or (|) of the bits in two flags values.

type Output = OptFlags

The resulting type after applying the | operator.

impl BitOrAssign for OptFlags

fn bitor_assign(&mut self, other: OptFlags)

The bitwise or (|) of the bits in two flags values.

impl BitXor for OptFlags

fn bitxor(self, other: OptFlags) -> OptFlags

The bitwise exclusive-or (^) of the bits in two flags values.

type Output = OptFlags

The resulting type after applying the ^ operator.

impl BitXorAssign for OptFlags

fn bitxor_assign(&mut self, other: OptFlags)

The bitwise exclusive-or (^) of the bits in two flags values.

impl Clone for OptFlags

fn clone(&self) -> OptFlags

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OptFlags

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

Formats the value using the given formatter.

impl Default for OptFlags

fn default() -> OptFlags

Returns the “default value” for a type.

impl Extend<OptFlags> for OptFlags

fn extend<T>(&mut self, iterator: T)

where T: IntoIterator<Item = OptFlags>,

The bitwise or (|) of the bits in each flags value.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl Flags for OptFlags

const FLAGS: &'static [Flag<OptFlags>] = _

The set of defined flags.

type Bits = u32

The underlying bits type.

fn bits(&self) -> u32

Get the underlying bits value.

fn from_bits_retain(bits: u32) -> OptFlags

Convert from a bits value exactly.

fn empty() -> Self

Get a flags value with all bits unset.

fn all() -> Self

Get a flags value with all known bits set.

fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value.

fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.

fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

fn iter(&self) -> Iter<Self>

Yield a set of contained flags values.

fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values.

fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

fn intersects(&self, other: Self) -> bool

where Self: Sized,

Whether any set bits in a source flags value are also set in a target flags value.

fn contains(&self, other: Self) -> bool

where Self: Sized,

Whether all set bits in a source flags value are also set in a target flags value.

fn insert(&mut self, other: Self)

where Self: Sized,

The bitwise or (|) of the bits in two flags values.

fn remove(&mut self, other: Self)

where Self: Sized,

The intersection of a source flags value with the complement of a target flags value (&!).

fn toggle(&mut self, other: Self)

where Self: Sized,

The bitwise exclusive-or (^) of the bits in two flags values.

fn set(&mut self, other: Self, value: bool)

where Self: Sized,

Call [Flags::insert] when value is true or [Flags::remove] when value is false.

fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in two flags values.

fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

fn complement(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

impl FromIterator<OptFlags> for OptFlags

fn from_iter<T>(iterator: T) -> OptFlags

where T: IntoIterator<Item = OptFlags>,

The bitwise or (|) of the bits in each flags value.

impl IntoIterator for OptFlags

type Item = OptFlags

The type of the elements being iterated over.

type IntoIter = Iter<OptFlags>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <OptFlags as IntoIterator>::IntoIter

Creates an iterator from a value.

impl LowerHex for OptFlags

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

Formats the value using the given formatter.

impl Not for OptFlags

fn not(self) -> OptFlags

The bitwise negation (!) of the bits in a flags value, truncating the result.

type Output = OptFlags

The resulting type after applying the ! operator.

impl Octal for OptFlags

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

Formats the value using the given formatter.

impl Sub for OptFlags

fn sub(self, other: OptFlags) -> OptFlags

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

type Output = OptFlags

The resulting type after applying the - operator.

impl SubAssign for OptFlags

fn sub_assign(&mut self, other: OptFlags)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

impl UpperHex for OptFlags

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

Formats the value using the given formatter.

impl Copy for OptFlags