fix clippy lints

odbc-api/src/buffers/bin_column.rs

@@ -88,7 +88,7 @@ impl BinColumn {
         BinColumnIt {
             pos: 0,
             num_rows,
-            col: &self,
+            col: self,
         }
     }
 

odbc-api/src/buffers/text_column.rs

@@ -211,7 +211,7 @@ impl<C> TextColumn<C> {
         TextColumnIt {
             pos: 0,
             num_rows,
-            col: &self,
+            col: self,
         }
     }
 

odbc-api/src/parameter/varbin.rs

@@ -72,12 +72,12 @@ where
         let slice = self.buffer.borrow();
         match self.indicator() {
             Indicator::Null => None,
-            Indicator::NoTotal => Some(&slice),
+            Indicator::NoTotal => Some(slice),
             Indicator::Length(len) => {
                 if self.is_complete() {
                     Some(&slice[..len])
                 } else {
-                    Some(&slice)
+                    Some(slice)
                 }
             }
         }

odbc-api/tests/common.rs

@@ -49,7 +49,7 @@ pub fn setup_empty_table(
         .join(", ");
 
     let create_table = format!("CREATE TABLE {} (id {},{});", table_name, index_type, cols);
-    conn.execute(&drop_table, ())?;
+    conn.execute(drop_table, ())?;
     conn.execute(&create_table, ())?;
     Ok(())
 }

odbc-api/tests/integration.rs

@@ -1905,7 +1905,7 @@ fn large_strings(profile: &Profile) {
 
     loop {
         row.get_data(1, &mut buf).unwrap();
-        actual += &std::str::from_utf8(buf.as_bytes().unwrap()).unwrap();
+        actual += std::str::from_utf8(buf.as_bytes().unwrap()).unwrap();
         if buf.is_complete() {
             break;
         }

odbcsv/src/main.rs

@@ -245,7 +245,7 @@ fn query(environment: &Environment, opt: &QueryOpt) -> Result<(), Error> {
     };
     let mut writer = csv::Writer::from_writer(out);
 
-    let connection = open_connection(&environment, connect_opts)?;
+    let connection = open_connection(environment, connect_opts)?;
 
     // Convert the input strings into parameters suitable to for use with ODBC.
     let params: Vec<_> = parameters
@@ -254,7 +254,7 @@ fn query(environment: &Environment, opt: &QueryOpt) -> Result<(), Error> {
         .collect();
 
     // Execute the query as a one off, and pass the parameters.
-    match connection.execute(&query, params.as_slice())? {
+    match connection.execute(query, params.as_slice())? {
         Some(cursor) => {
             // Write column names.
             let headline: Vec<String> = cursor.column_names()?.collect::<Result<_, _>>()?;
@@ -304,7 +304,7 @@ fn insert(environment: &Environment, insert_opt: &InsertOpt) -> Result<(), Error
         Box::new(hold_stdin.lock())
     };
     let mut reader = csv::Reader::from_reader(input);
-    let connection = open_connection(&environment, connect_opts)?;
+    let connection = open_connection(environment, connect_opts)?;
 
     // Generate statement text from table name and headline
     let headline = reader.byte_headers()?;