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8d188c5f1a
- add database-specific Column types: MySqlColumn, PgColumn, etc. - add Row::columns() -> &[DB::Column] - add Row::column(I) and Row::try_column(I)
27 lines
825 B
Rust
27 lines
825 B
Rust
use crate::database::Database;
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use std::fmt::Debug;
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pub trait Column: private_column::Sealed + 'static + Send + Sync + Debug {
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type Database: Database;
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/// Gets the column ordinal.
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///
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/// This can be used to unambiguously refer to this column within a row in case more than
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/// one column have the same name
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fn ordinal(&self) -> usize;
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/// Gets the column name or alias.
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///
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/// The column name is unreliable (and can change between database minor versions) if this
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/// column is an expression that has not been aliased.
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fn name(&self) -> &str;
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/// Gets the type information for the column.
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fn type_info(&self) -> &<Self::Database as Database>::TypeInfo;
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}
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// Prevent users from implementing the `Row` trait.
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pub(crate) mod private_column {
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pub trait Sealed {}
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}
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