Enum Dialect 

#[non_exhaustive]
pub enum Dialect {
    Postgres,
    MySql,
    Athena,
    Sqlite,
}

Supported SQL dialects (4-variant per spike 005).

#[non_exhaustive] permits additive evolution to Oracle / SqlServer / DuckDb / ClickHouse in later phases without semver break.

Example

use pmcp_server_toolkit::sql::Dialect;

assert_eq!(Dialect::Postgres.name(), "PostgreSQL");
assert!(Dialect::Sqlite.placeholder_guidance().contains(":name"));

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Postgres

PostgreSQL — positional $1, $2, … placeholders.

MySql

MySQL — positional ? placeholders.

Athena

Amazon Athena (Presto/Trino) — positional ? placeholders.

Sqlite

SQLite — named :name or positional ? placeholders.

Implementations

impl Dialect

pub const fn name(self) -> &'static str

Stable, human-readable name for prompts and logs.

Example

use pmcp_server_toolkit::sql::Dialect;
assert_eq!(Dialect::MySql.name(), "MySQL");

pub const fn placeholder_guidance(self) -> &'static str

One-line guidance string for the code-mode prompt body explaining the dialect’s placeholder convention. Used by assemble_code_mode_prompt even though Phase 83 does not ship translate_placeholders — the LLM still benefits from knowing the eventual binding shape.

Example

use pmcp_server_toolkit::sql::Dialect;
assert!(Dialect::Postgres.placeholder_guidance().contains("$1"));

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 Debug for Dialect

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

Formats the value using the given formatter.

impl Hash for Dialect

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Dialect

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

impl Eq for Dialect

impl StructuralPartialEq for Dialect