[SPARK-3131][SQL] compression codec config property name and default codec set to snappy

Author: chutium

sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala

@@ -33,7 +33,7 @@ private[spark] object SQLConf {
   val DIALECT = "spark.sql.dialect"
   val PARQUET_BINARY_AS_STRING = "spark.sql.parquet.binaryAsString"
   val PARQUET_CACHE_METADATA = "spark.sql.parquet.cacheMetadata"
-  val PARQUET_COMPRESSION = "spark.sql.parquet.compression"
+  val PARQUET_COMPRESSION = "spark.sql.parquet.compression.codec"
 
   // This is only used for the thriftserver
   val THRIFTSERVER_POOL = "spark.sql.thriftserver.scheduler.pool"
@@ -79,7 +79,7 @@ trait SQLConf {
   private[spark] def useCompression: Boolean = getConf(COMPRESS_CACHED, "false").toBoolean
 
   /** The compression codec for writing to a Parquetfile */
-  private[spark] def parquetCompressionCodec: String = getConf(PARQUET_COMPRESSION, "gzip")
+  private[spark] def parquetCompressionCodec: String = getConf(PARQUET_COMPRESSION, "snappy")
 
   /** The number of rows that will be  */
   private[spark] def columnBatchSize: Int = getConf(COLUMN_BATCH_SIZE, "1000").toInt