Struct Capabilities 

pub struct Capabilities {
    pub max_sql_len: usize,
    pub max_statements: usize,
    pub udf: bool,
    pub interactive_transactions: bool,
    pub int64_as_text: bool,
    pub max_compound_select: usize,
    pub compound_recursive_cte: bool,
    pub name: String,
}

What a backend can do. The compiler adapts SQL generation to it.

Fields

max_sql_len: usize

Maximum length of one SQL statement in bytes (D1: 100 KB).

max_statements: usize

Maximum number of statements in one request.

udf: bool

The oxilite_* user-defined functions (regex, replace, hashes, Unicode case) exist.

interactive_transactions: bool

The backend supports interactive (read-then-write) transactions.

int64_as_text: bool

64-bit integers must be returned as TEXT (JavaScript numbers lose precision above 2^53).

max_compound_select: usize

Maximum number of terms in one compound SELECT (UNION ALL chain); D1 allows 5.

compound_recursive_cte: bool

A recursive CTE may have a compound recursive term (SQLite 3.34.0, 2020-12-01). A backend whose version cannot be established MUST leave this false: mutual recursion then takes a strategy that does not need it, instead of emitting SQL that would fail.

name: String

Name of the backend, for explain().

Implementations

impl Capabilities

pub fn native() -> Self

A native SQLite linked in-process.

pub fn d1() -> Self

Cloudflare D1 limits.

Trait Implementations

impl Clone for Capabilities

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Capabilities

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

Formats the value using the given formatter.

impl Default for Capabilities

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Capabilities

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Capabilities