Enum Dialect 

pub enum Dialect {
    Postgres,
    Sqlite,
    Mysql,
}

Database dialect selection and dialect-specific behavior.

Type catalogs under each dialect are intentionally incomplete and frequently updated. data_types.rs lists native built-in types, aliases, and canonicalization rules; extension_types.rs lists popular extension or externally provided types. These catalogs exist for deterministic canonicalization, typo suggestions, and helpful prompts. They are not a claim that Gaman knows the full database type universe. Unknown types must not be rejected solely because they are absent from these catalogs; migration history and explicit user decisions are the project-local trust boundary. New dialect implementations must keep native data types and extension/popular external types in separate files following this layout.

Variants

Postgres

Sqlite

Mysql

Implementations

impl Dialect

pub fn as_str(&self) -> &'static str

Returns the stable lowercase name for this dialect.

pub fn parse(value: &str) -> Option<Self>

Parses a dialect name such as postgres, postgresql, sqlite, sqlite3, mysql, or mariadb.

pub fn parse_from_url(database_url: &str) -> Result<Self, DialectParseError>

Infers the dialect from a database URL scheme.

This accepts normal URL forms such as postgres://..., postgresql://..., sqlite://..., mysql://..., and mariadb://..., plus SQLx’s SQLite shorthand such as sqlite::memory:.

pub fn reorder( &self, ops: Vec<Operation>, previous: &Schema, current: &Schema, ) -> Vec<Operation>

Reorders operations to satisfy database-specific execution constraints. The default is a no-op — only databases with ordering requirements need to override. Called once per migration after diffing, before SQL generation or writing.

pub fn should_merge(&self, _table_name: &str, _op: &Operation) -> bool

Whether a decomposed sub-entity op should be folded back into its parent CreateTable. Postgres can inline everything; other dialects (e.g. SQLite) may need FKs kept inline while indexes stay separate.

pub fn normalize_type<'a>(&self, t: &'a str) -> &'a str

pub fn canonical_type(&self, t: &str) -> String

pub fn is_catalog_type(&self, t: &str) -> bool

pub fn type_suggestions(&self, t: &str) -> Vec<String>

pub fn validate_schema( &self, schema: &Schema, ) -> Result<(), SchemaValidationError>

pub fn normalize_inspected_schema( &self, schema: Schema, ) -> Result<Schema, SchemaValidationError>

Normalizes a live inspected schema before semantic drift comparison.

pub fn drift_contract(&self) -> &'static [DriftPropertyDoc]

Returns the documented semantic drift properties for this dialect.

pub fn validate_migration(&self, m: &Migration) -> Result<(), DialectError>

Trait Implementations

impl Clone for Dialect

fn clone(&self) -> Dialect

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Dialect

impl Debug for Dialect

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

Formats the value using the given formatter.

impl Eq for Dialect

impl PartialEq for Dialect

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Dialect