/// Errors from index operations.
#[derive(Debug, thiserror::Error)]
pub enum IndexError {
    #[error("Duplicate key error: index '{index}' has duplicate value for key {key}")]
    DuplicateKey { index: String, key: String },

    #[error("Index not found: {0}")]
    IndexNotFound(String),

    #[error("Invalid index specification: {0}")]
    InvalidIndex(String),

    #[error("Cannot drop protected index: {0}")]
    ProtectedIndex(String),
}