Struct PageFlags 

pub struct PageFlags {
    pub has_free_lines: bool,
    pub page_full: bool,
    pub all_visible: bool,
}

The bits of pd_flags.

Fields

has_free_lines: bool

Some line pointers before pd_lower are unused and can be reused. A hint: changes to it aren’t WAL-logged. Postgres’s PD_HAS_FREE_LINES.

page_full: bool

An UPDATE found no room on the page for its new row version, so pruning the page may help. A hint too. Postgres’s PD_PAGE_FULL.

all_visible: bool

Every row on the page is visible to every transaction, current and future. Set by VACUUM, along with the page’s bit in the visibility map. Postgres’s PD_ALL_VISIBLE.

Trait Implementations

impl Clone for PageFlags

fn clone(&self) -> PageFlags

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PageFlags

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

Formats the value using the given formatter.

impl Default for PageFlags

fn default() -> PageFlags

Returns the “default value” for a type.

impl From<PageFlags> for u16

fn from(flags: PageFlags) -> Self

Converts to this type from the input type.

impl PartialEq for PageFlags

fn eq(&self, other: &PageFlags) -> 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 TryFrom<u16> for PageFlags

Fails if a bit Postgres doesn’t define is set.

type Error = InvalidHeader

The type returned in the event of a conversion error.

fn try_from(bits: u16) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for PageFlags

impl Eq for PageFlags

impl StructuralPartialEq for PageFlags