Enum Dialect 

#[non_exhaustive]
pub enum Dialect {
    Snowflake,
    Databricks,
}

The SQL dialect a lex/parse/format request targets.

#[non_exhaustive] so further dialects can be added without it being a breaking change. Default is Dialect::Snowflake.

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.

Snowflake

Snowflake SQL — the original and default dialect of this toolchain.

Databricks

Databricks SQL / Spark SQL. Behavior is being filled in across later phases; today its predicate answers describe the intended divergence but no Databricks-specific lexing, parsing, or formatting is wired up yet.

Implementations

impl Dialect

pub fn supports_dollar_quoting(self) -> bool

Dollar quoting: $$ ... $$ dollar-quoted bodies and $1 / $name positional/variable references. Snowflake only — Databricks has no $$ body or $n reference.

pub fn supports_flow_operator(self) -> bool

The flow operator ->> chaining statements into a pipeline. Snowflake only.

pub fn supports_copy_into(self) -> bool

COPY INTO <target> FROM <source> bulk load/unload. Snowflake only.

pub fn supports_double_slash_comments(self) -> bool

// ... line comments. Snowflake accepts them; Databricks/Spark uses / as an operator and must not have a doubled slash consume the rest of the physical line.

pub fn supports_semantic_view(self) -> bool

CREATE SEMANTIC VIEW ... semantic-layer DDL. Snowflake only.

pub fn supports_scripting_blocks(self) -> bool

SQL scripting blocks: BEGIN ... END, declarations, control-flow statements, and the := assignment operator. Snowflake and Databricks both support compound SQL blocks.

pub fn supports_stage_refs(self) -> bool

Stage references: @stage / @~ / @%table paths in FROM, COPY, and PUT/GET. Snowflake only.

pub fn supports_backtick_identifiers(self) -> bool

Backtick-quoted identifiers: `col`. Databricks only (Snowflake quotes with ").

pub fn supports_prefixed_strings(self) -> bool

Databricks/Spark prefixed string literals such as raw strings (r'...') and hex binary literals (X'1A').

pub fn supports_null_safe_eq(self) -> bool

Databricks/Spark null-safe equality operator: <=>.

pub fn supports_lateral_view(self) -> bool

LATERAL VIEW explode(...) table-generating clause. Databricks only.

pub fn supports_delta_table_options(self) -> bool

Delta/Spark table DDL options: USING, LOCATION, TBLPROPERTIES, OPTIONS, and PARTITIONED BY. Databricks only.

pub fn supports_lambda_expr(self) -> bool

Higher-order-function lambdas: x -> expr and (x, y) -> expr. Databricks only for now.

pub fn supports_as_of_travel(self) -> bool

Time travel via VERSION AS OF / TIMESTAMP AS OF. Databricks only (Snowflake uses AT / BEFORE).

pub fn supports_databricks_query_clauses(self) -> bool

Databricks/Spark query distribution clauses: DISTRIBUTE BY, SORT BY, and CLUSTER BY.

pub fn supports_delta_commands(self) -> bool

Delta/Spark maintenance + cache statements — VACUUM, OPTIMIZE … ZORDER BY, INSERT OVERWRITE, CACHE/UNCACHE/REFRESH, DESCRIBE HISTORY, and the WHEN NOT MATCHED BY SOURCE/INSERT * MERGE extensions. Databricks only. The leading words (VACUUM, OPTIMIZE, CACHE, …) are recognized contextually at statement start, so they stay ordinary identifiers under Snowflake (and elsewhere under Databricks), and Snowflake output is byte-identical.

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<(), Error>

Formats the value using the given formatter.

impl Default for Dialect

fn default() -> Dialect

Returns the “default value” for a type.

impl Eq for Dialect

impl Hash for Dialect

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

where __H: Hasher,

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Dialect