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#[macro_use]
mod query_id;
#[macro_use]
mod clause_macro;
mod ast_pass;
pub mod bind_collector;
mod debug_query;
mod delete_statement;
#[doc(hidden)]
pub mod functions;
#[doc(hidden)]
pub mod nodes;
mod distinct_clause;
mod group_by_clause;
mod limit_clause;
mod offset_clause;
mod order_clause;
mod returning_clause;
mod select_clause;
mod select_statement;
pub mod where_clause;
pub mod insert_statement;
pub mod update_statement;
pub use self::ast_pass::AstPass;
pub use self::bind_collector::BindCollector;
pub use self::debug_query::DebugQuery;
pub use self::query_id::QueryId;
#[doc(hidden)]
pub use self::select_statement::{SelectStatement, BoxedSelectStatement};
#[doc(inline)]
pub use self::update_statement::{
AsChangeset,
Changeset,
IncompleteUpdateStatement,
IntoUpdateTarget,
UpdateStatement,
UpdateTarget,
};
#[doc(inline)]
pub use self::insert_statement::{IncompleteInsertStatement, IncompleteDefaultInsertStatement};
use std::error::Error;
use backend::Backend;
use result::QueryResult;
#[doc(hidden)]
pub type Binds = Vec<Option<Vec<u8>>>;
pub type BuildQueryResult = Result<(), Box<Error+Send+Sync>>;
pub trait QueryBuilder<DB: Backend> {
fn push_sql(&mut self, sql: &str);
fn push_identifier(&mut self, identifier: &str) -> QueryResult<()>;
fn push_bind_param(&mut self);
fn finish(self) -> String;
}
pub trait Query {
type SqlType;
}
impl<'a, T: Query> Query for &'a T {
type SqlType = T::SqlType;
}
pub trait QueryFragment<DB: Backend> {
fn walk_ast(&self, pass: AstPass<DB>) -> QueryResult<()>;
fn to_sql(&self, out: &mut DB::QueryBuilder) -> QueryResult<()> {
self.walk_ast(AstPass::to_sql(out))
}
fn collect_binds(
&self,
out: &mut DB::BindCollector,
metadata_lookup: &DB::MetadataLookup,
) -> QueryResult<()> {
self.walk_ast(AstPass::collect_binds(out, metadata_lookup))
}
fn is_safe_to_cache_prepared(&self) -> QueryResult<bool> {
let mut result = true;
self.walk_ast(AstPass::is_safe_to_cache_prepared(&mut result))?;
Ok(result)
}
}
impl<T: ?Sized, DB> QueryFragment<DB> for Box<T> where
DB: Backend,
T: QueryFragment<DB>,
{
fn walk_ast(&self, pass: AstPass<DB>) -> QueryResult<()> {
QueryFragment::walk_ast(&**self, pass)
}
}
impl<'a, T: ?Sized, DB> QueryFragment<DB> for &'a T where
DB: Backend,
T: QueryFragment<DB>,
{
fn walk_ast(&self, pass: AstPass<DB>) -> QueryResult<()> {
QueryFragment::walk_ast(&**self, pass)
}
}
impl<DB: Backend> QueryFragment<DB> for () {
fn walk_ast(&self, _: AstPass<DB>) -> QueryResult<()> {
Ok(())
}
}
pub trait AsQuery {
type SqlType;
type Query: Query<SqlType=Self::SqlType>;
fn as_query(self) -> Self::Query;
}
impl<T: Query> AsQuery for T {
type SqlType = <Self as Query>::SqlType;
type Query = Self;
fn as_query(self) -> Self::Query {
self
}
}
pub fn debug_query<DB, T>(query: &T) -> DebugQuery<T, DB> {
DebugQuery::new(query)
}
#[doc(hidden)]
#[cfg(all(feature = "with-deprecated", feature = "postgres"))]
pub fn deprecated_debug_sql<T>(query: &T) -> String where
T: QueryFragment<::pg::Pg>,
{
debug_query(query).to_string()
}
#[doc(hidden)]
#[cfg(all(feature = "with-deprecated", feature = "mysql", not(feature = "postgres")))]
pub fn deprecated_debug_sql<T>(query: &T) -> String where
T: QueryFragment<::mysql::Mysql>,
{
debug_query(query).to_string()
}
#[doc(hidden)]
#[cfg(all(feature = "with-deprecated", feature = "sqlite", not(any(feature = "postgres", feature = "mysql"))))]
pub fn deprecated_debug_sql<T>(query: &T) -> String where
T: QueryFragment<::sqlite::Sqlite>,
{
debug_query(query).to_string()
}
#[doc(hidden)]
#[cfg(all(feature = "with-deprecated", not(any(feature = "postgres", feature = "mysql", feature = "sqlite"))))]
pub fn deprecated_debug_sql<T>(_query: &T) -> String {
String::from("At least one backend must be enabled to generated debug SQL")
}