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use {
crate::{ast::ColumnDef, result::MutResult},
async_trait::async_trait,
serde::Serialize,
std::fmt::Debug,
thiserror::Error,
};
#[derive(Error, Serialize, Debug, PartialEq)]
pub enum AlterTableError {
#[error("Table not found: {0}")]
TableNotFound(String),
#[error("Renaming column not found")]
RenamingColumnNotFound,
#[error("Default value is required: {0:#?}")]
DefaultValueRequired(ColumnDef),
#[error("Adding column already exists: {0}")]
AddingColumnAlreadyExists(String),
#[error("Dropping column not found: {0}")]
DroppingColumnNotFound(String),
}
#[async_trait(?Send)]
pub trait AlterTable
where
Self: Sized,
{
async fn rename_schema(self, table_name: &str, new_table_name: &str) -> MutResult<Self, ()>;
async fn rename_column(
self,
table_name: &str,
old_column_name: &str,
new_column_name: &str,
) -> MutResult<Self, ()>;
async fn add_column(self, table_name: &str, column_def: &ColumnDef) -> MutResult<Self, ()>;
async fn drop_column(
self,
table_name: &str,
column_name: &str,
if_exists: bool,
) -> MutResult<Self, ()>;
}