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use crate::core::db::DriverType;
pub trait PageLimit {
fn page_limit_sql(&self, offset: u64, size: u64) -> crate::core::Result<String>;
}
impl PageLimit for DriverType {
fn page_limit_sql(&self, offset: u64, size: u64) -> crate::core::Result<String> {
return match self {
DriverType::Mysql => Ok(format!(
" {} {},{}",
crate::sql::TEMPLATE.limit.value,
offset,
size
)),
DriverType::Postgres => Ok(format!(
" {} {} {} {}",
crate::sql::TEMPLATE.limit.value,
size,
crate::sql::TEMPLATE.offset.value,
offset
)),
DriverType::Sqlite => Ok(format!(
" {} {} {} {}",
crate::sql::TEMPLATE.limit.value,
size,
crate::sql::TEMPLATE.offset.value,
offset
)),
DriverType::Mssql => {
Ok(format!(
" {} {} {} {} {}",
crate::sql::TEMPLATE.offset.value,
offset,
crate::sql::TEMPLATE.rows_fetch_next.value,
size,
crate::sql::TEMPLATE.rows_only.value
))
}
DriverType::None => Err(crate::core::Error::from(format!(
"[rbatis] not support now for DriverType:{:?}",
DriverType::None
))),
};
}
}
#[test]
pub fn test_create_limit() {
let mysql_limit = DriverType::Mysql.page_limit_sql(1, 20).unwrap();
println!("{}", mysql_limit);
let pg_limit = DriverType::Postgres.page_limit_sql(1, 20).unwrap();
println!("{}", pg_limit);
let sqlite_limit = DriverType::Sqlite.page_limit_sql(1, 20).unwrap();
println!("{}", sqlite_limit);
}