diff --git a/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectCsvRecordReader.java b/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectCsvRecordReader.java
index 226824c54912..565948d71496 100644
--- a/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectCsvRecordReader.java
+++ b/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectCsvRecordReader.java
@@ -27,6 +27,7 @@
 import java.util.Properties;
 
 import static org.apache.hadoop.hive.serde.serdeConstants.ESCAPE_CHAR;
+import static org.apache.hadoop.hive.serde.serdeConstants.FIELD_DELIM;
 import static org.apache.hadoop.hive.serde.serdeConstants.QUOTE_CHAR;
 
 class S3SelectCsvRecordReader
@@ -91,4 +92,11 @@ public SelectObjectContentRequest buildSelectObjectRequest(Properties schema, St
 
         return selectObjectRequest;
     }
+
+    @Override
+    protected String getFieldDelimiter(Properties schema)
+    {
+        // Use the field delimiter only if it is specified in the schema. If not, use null (defaults to ',' in S3 Select).
+        return schema.getProperty(FIELD_DELIM);
+    }
 }
diff --git a/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectLineRecordReader.java b/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectLineRecordReader.java
index b7f32548fe98..9476ebaeb0fd 100644
--- a/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectLineRecordReader.java
+++ b/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectLineRecordReader.java
@@ -224,7 +224,7 @@ public float getProgress()
         return ((float) (position - start)) / (end - start);
     }
 
-    String getFieldDelimiter(Properties schema)
+    protected String getFieldDelimiter(Properties schema)
     {
         return schema.getProperty(FIELD_DELIM, schema.getProperty(SERIALIZATION_FORMAT));
     }
diff --git a/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectPushdown.java b/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectPushdown.java
index 40073e4e2b62..7021e2238f31 100644
--- a/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectPushdown.java
+++ b/plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/S3SelectPushdown.java
@@ -108,7 +108,7 @@ public static boolean isCompressionCodecSupported(InputFormat<?, ?> inputFormat,
         if (inputFormat instanceof TextInputFormat) {
             return getCompressionCodec((TextInputFormat) inputFormat, path)
                     .map(codec -> (codec instanceof GzipCodec) || (codec instanceof BZip2Codec))
-                    .orElse(false); // TODO (https://github.com/trinodb/trino/issues/2475) fix S3 Select when file not compressed
+                    .orElse(true);
         }
 
         return false;
diff --git a/plugin/trino-hive/src/test/java/io/trino/plugin/hive/s3select/TestS3SelectPushdown.java b/plugin/trino-hive/src/test/java/io/trino/plugin/hive/s3select/TestS3SelectPushdown.java
index 00a87641a135..adcf2cd928b8 100644
--- a/plugin/trino-hive/src/test/java/io/trino/plugin/hive/s3select/TestS3SelectPushdown.java
+++ b/plugin/trino-hive/src/test/java/io/trino/plugin/hive/s3select/TestS3SelectPushdown.java
@@ -37,7 +37,7 @@ public void setUp()
     public void testIsCompressionCodecSupported()
     {
         assertTrue(S3SelectPushdown.isCompressionCodecSupported(inputFormat, new Path("s3://fakeBucket/fakeObject.gz")));
-        assertFalse(S3SelectPushdown.isCompressionCodecSupported(inputFormat, new Path("s3://fakeBucket/fakeObject")));
+        assertTrue(S3SelectPushdown.isCompressionCodecSupported(inputFormat, new Path("s3://fakeBucket/fakeObject")));
         assertFalse(S3SelectPushdown.isCompressionCodecSupported(inputFormat, new Path("s3://fakeBucket/fakeObject.lz4")));
         assertFalse(S3SelectPushdown.isCompressionCodecSupported(inputFormat, new Path("s3://fakeBucket/fakeObject.snappy")));
         assertTrue(S3SelectPushdown.isCompressionCodecSupported(inputFormat, new Path("s3://fakeBucket/fakeObject.bz2")));