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use std::marker::PhantomData;
use backend::*;
use expression::{AsExpression, Expression, SelectableExpression, NonAggregate};
use pg::{Pg, PgQueryBuilder};
use query_builder::*;
use query_builder::debug::DebugQueryBuilder;
use result::QueryResult;
use types::{Array, HasSqlType};
pub fn any<ST, T>(vals: T) -> Any<T::Expression, ST> where
Pg: HasSqlType<ST>,
T: AsExpression<Array<ST>>,
{
Any::new(vals.as_expression())
}
#[doc(hidden)]
pub struct Any<Expr, ST> {
expr: Expr,
_marker: PhantomData<ST>,
}
impl<Expr, ST> Any<Expr, ST> {
fn new(expr: Expr) -> Self {
Any {
expr: expr,
_marker: PhantomData,
}
}
}
impl<Expr, ST> Expression for Any<Expr, ST> where
Pg: HasSqlType<ST>,
Expr: Expression<SqlType=Array<ST>>,
{
type SqlType = ST;
}
impl<Expr, ST> QueryFragment<Pg> for Any<Expr, ST> where
Expr: QueryFragment<Pg>,
{
fn to_sql(&self, out: &mut PgQueryBuilder) -> BuildQueryResult {
out.push_sql("ANY(");
try!(self.expr.to_sql(out));
out.push_sql(")");
Ok(())
}
fn collect_binds(&self, out: &mut <Pg as Backend>::BindCollector) -> QueryResult<()> {
try!(self.expr.collect_binds(out));
Ok(())
}
fn is_safe_to_cache_prepared(&self) -> bool {
self.expr.is_safe_to_cache_prepared()
}
}
impl<Expr, ST> QueryFragment<Debug> for Any<Expr, ST> where
Expr: QueryFragment<Debug>,
{
fn to_sql(&self, out: &mut DebugQueryBuilder) -> BuildQueryResult {
out.push_sql("ANY(");
try!(self.expr.to_sql(out));
out.push_sql(")");
Ok(())
}
fn collect_binds(&self, out: &mut <Debug as Backend>::BindCollector) -> QueryResult<()> {
try!(self.expr.collect_binds(out));
Ok(())
}
fn is_safe_to_cache_prepared(&self) -> bool {
self.expr.is_safe_to_cache_prepared()
}
}
impl_query_id!(Any<Expr, ST>);
impl<Expr, ST, QS> SelectableExpression<QS> for Any<Expr, ST> where
Pg: HasSqlType<ST>,
Any<Expr, ST>: Expression,
Expr: SelectableExpression<QS>,
{
}
impl<Expr, ST> NonAggregate for Any<Expr, ST> where
Expr: NonAggregate,
Any<Expr, ST>: Expression,
{
}