Trait datafusion_sql::unparser::dialect::Dialect

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pub trait Dialect {
    // Required method
    fn identifier_quote_style(&self, _identifier: &str) -> Option<char>;

    // Provided method
    fn supports_nulls_first_in_sort(&self) -> bool { ... }
}
Expand description

Dialect to use for Unparsing

The default dialect tries to avoid quoting identifiers unless necessary (e.g. a instead of "a") but this behavior can be overridden as needed

Note: This trait will eventually be replaced by the Dialect in the SQLparser package

See https://github.com/sqlparser-rs/sqlparser-rs/pull/1170 See also the discussion in https://github.com/apache/datafusion/pull/10625

Required Methods§

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fn identifier_quote_style(&self, _identifier: &str) -> Option<char>

Return the character used to quote identifiers.

Provided Methods§

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fn supports_nulls_first_in_sort(&self) -> bool

Does the dialect support specifying NULLS FIRST/LAST in ORDER BY clauses?

Implementors§