activecube_rs/sql/
dialect.rs

1use crate::compiler::ir::{QueryIR, SqlValue};
2
3/// Trait for SQL dialect implementations.
4/// Each database backend (StarRocks, ClickHouse, etc.) implements this
5/// to compile a QueryIR into its native SQL syntax.
6pub trait SqlDialect: Send + Sync {
7    /// Compile a QueryIR into a parameterized SQL string and binding values.
8    fn compile(&self, ir: &QueryIR) -> (String, Vec<SqlValue>);
9
10    /// Quote a column or table identifier for this dialect (e.g. backticks for MySQL/StarRocks).
11    fn quote_identifier(&self, name: &str) -> String;
12
13    /// Whether the dialect supports `COUNT(DISTINCT col)`.
14    fn supports_count_distinct(&self) -> bool {
15        true
16    }
17
18    /// The placeholder character for parameterized queries (e.g. `?` for MySQL, `$1` for PostgreSQL).
19    fn placeholder(&self) -> &str {
20        "?"
21    }
22
23    /// Dialect name for logging/debugging.
24    fn name(&self) -> &str;
25}
activecube_rs/sql/dialect.rs

activecube_rs/sql/
dialect.rs
