Change the compression description

Author: fjh100456

sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala

@@ -323,7 +323,9 @@ object SQLConf {
     .createWithDefault(false)
 
   val PARQUET_COMPRESSION = buildConf("spark.sql.parquet.compression.codec")
-    .doc("Sets the compression codec use when writing Parquet files. Acceptable values include: " +
+    .doc("Sets the compression codec use when writing Parquet files. If other compression codec " +
+      "configuration was found through hive or parquet, the precedence would be `compression`, " +
+      "`parquet.compression`, `spark.sql.parquet.compression.codec`. Acceptable values include: " +
       "none, uncompressed, snappy, gzip, lzo.")
     .stringConf
     .transform(_.toLowerCase(Locale.ROOT))
@@ -364,7 +366,9 @@ object SQLConf {
       .createWithDefault(true)
 
   val ORC_COMPRESSION = buildConf("spark.sql.orc.compression.codec")
-    .doc("Sets the compression codec use when writing ORC files. Acceptable values include: " +
+    .doc("Sets the compression codec use when writing ORC files. If other compression codec " +
+      "configuration was found through hive or ORC, the precedence would be `compression`, " +
+      "`orc.compress`, `spark.sql.orc.compression.codec`. Acceptable values include: " +
       "none, uncompressed, snappy, zlib, lzo.")
     .stringConf
     .transform(_.toLowerCase(Locale.ROOT))