Only reduce IN predicate if value is provided

Author: alukach

src/expr.rs

@@ -1,15 +1,16 @@
 use crate::{geometry::spatial_op, temporal::temporal_op, Error, Geometry, Validator};
-use geo_types::Geometry as GGeom;
-use geo_types::{coord, Rect};
+use geo_types::{coord, Geometry as GGeom, Rect};
 use json_dotpath::DotPaths;
 use like::Like;
 use pg_escape::{quote_identifier, quote_literal};
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
-use std::collections::HashSet;
-use std::fmt::Debug;
-use std::ops::{Add, Deref};
-use std::str::FromStr;
+use std::{
+    collections::HashSet,
+    fmt::Debug,
+    ops::{Add, Deref},
+    str::FromStr,
+};
 use unaccent::unaccent;
 use wkt::TryFromWkt;
 
@@ -451,6 +452,9 @@ impl Expr {
                             Ok(Expr::Operation { op, args })
                         }
                     } else if op == "in" {
+                        let Some(_) = j else {
+                            return Ok(Expr::Operation { op, args })
+                        };
                         let l: String = left.to_text()?;
                         let r: HashSet<String> = right.try_into()?;
                         let isin: bool = r.contains(&l);