From d16e9e1e69be9512b3dc366b05642bbcf803d2b6 Mon Sep 17 00:00:00 2001
From: Mahesh Kumar Behera <mbehera@cloudera.com>
Date: Mon, 24 Aug 2020 12:35:22 +0530
Subject: [PATCH] review comment fix

---
 .../hiveacid/HiveAcidDataSourceV2Reader.scala |  2 +-
 .../hiveacid/hive/HiveAcidMetadata.scala      | 41 ++++++++-----------
 .../spark/hiveacid/reader/TableReader.scala   |  6 +--
 3 files changed, 22 insertions(+), 27 deletions(-)

diff --git a/src/main/scala/com/qubole/spark/hiveacid/HiveAcidDataSourceV2Reader.scala b/src/main/scala/com/qubole/spark/hiveacid/HiveAcidDataSourceV2Reader.scala
index f6c65bb..5eab6c3 100644
--- a/src/main/scala/com/qubole/spark/hiveacid/HiveAcidDataSourceV2Reader.scala
+++ b/src/main/scala/com/qubole/spark/hiveacid/HiveAcidDataSourceV2Reader.scala
@@ -99,7 +99,7 @@ class HiveAcidDataSourceV2Reader
       txn: HiveAcidTxn => {
         import scala.collection.JavaConversions._
         val reader = new TableReader(sparkSession, txn, hiveAcidMetadata)
-        val hiveReader = reader.getReader(schema.fieldNames,
+        val hiveReader = reader.getPartitionsV2(schema.fieldNames,
           pushedFilterArray, new SparkAcidConf(sparkSession, options.toMap))
         factories.addAll(hiveReader)
       }
diff --git a/src/main/scala/com/qubole/spark/hiveacid/hive/HiveAcidMetadata.scala b/src/main/scala/com/qubole/spark/hiveacid/hive/HiveAcidMetadata.scala
index 3a30f95..9895e39 100644
--- a/src/main/scala/com/qubole/spark/hiveacid/hive/HiveAcidMetadata.scala
+++ b/src/main/scala/com/qubole/spark/hiveacid/hive/HiveAcidMetadata.scala
@@ -36,26 +36,27 @@ import org.apache.hadoop.mapred.{InputFormat, OutputFormat}
 import org.apache.spark.internal.Logging
 import org.apache.spark.sql._
 import org.apache.spark.sql.types._
-import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 
 /**
  * Represents metadata for hive acid table and exposes API to perform operations on top of it
- * @param database - name of the database
- * @param identifier - table identifier
- * @param hiveConf hiveConf - hive conf
+ * @param sparkSession - spark session object
+ * @param fullyQualifiedTableName - the fully qualified hive acid table name
  */
-class HiveAcidMetadata(database : Option[String],
-                       identifier : String,
-                       hiveConf: HiveConf,
-                       caseSensitiveAnalysis : Boolean = false) extends Logging {
+class HiveAcidMetadata(sparkSession: SparkSession,
+                       fullyQualifiedTableName: String) extends Logging {
+
+  // hive conf
+  private val hiveConf: HiveConf = HiveConverter.getHiveConf(sparkSession.sparkContext)
+  
   // a hive representation of the table
   val hTable: metadata.Table = {
     val hive: Hive = Hive.get(hiveConf)
+    val table = sparkSession.sessionState.sqlParser.parseTableIdentifier(fullyQualifiedTableName)
     val hTable = hive.getTable(
-      database match {
+      table.database match {
         case Some(database) => database
         case None => HiveAcidMetadata.DEFAULT_DATABASE
-      }, identifier)
+      }, table.identifier)
     Hive.closeCurrent()
     hTable
   }
@@ -133,7 +134,7 @@ class HiveAcidMetadata(database : Option[String],
   }
 
   private def getColName(field: StructField): String = {
-    HiveAcidMetadata.getColName(caseSensitiveAnalysis, field)
+    HiveAcidMetadata.getColName(sparkSession, field)
   }
 }
 
@@ -155,19 +156,13 @@ object HiveAcidMetadata {
 
   def fromSparkSession(sparkSession: SparkSession,
                        fullyQualifiedTableName: String): HiveAcidMetadata = {
-    val logicalPlan = sparkSession.sessionState.sqlParser.parseTableIdentifier(fullyQualifiedTableName)
-    new HiveAcidMetadata(logicalPlan.database,
-                          logicalPlan.table,
-                          HiveConverter.getHiveConf(sparkSession.sparkContext),
-                          sparkSession.sessionState.conf.caseSensitiveAnalysis)
-  }
-
-  def fromTableName(database : Option[String], table : String, hiveConf : HiveConf): HiveAcidMetadata = {
-    new HiveAcidMetadata(database, table, hiveConf)
+    new HiveAcidMetadata(
+      sparkSession,
+      fullyQualifiedTableName)
   }
 
-  def getColName(caseSensitiveAnalysis : Boolean, field: StructField): String = {
-    if (caseSensitiveAnalysis) {
+  def getColName(sparkSession: SparkSession, field: StructField): String = {
+    if (sparkSession.sessionState.conf.caseSensitiveAnalysis) {
       field.name
     } else {
       field.name.toLowerCase(Locale.ROOT)
@@ -175,6 +170,6 @@ object HiveAcidMetadata {
   }
 
   def getColNames(sparkSession: SparkSession, schema: StructType): Seq[String] = {
-    schema.map(getColName(sparkSession.sessionState.conf.caseSensitiveAnalysis, _))
+    schema.map(getColName(sparkSession, _))
   }
 }
diff --git a/src/main/scala/com/qubole/spark/hiveacid/reader/TableReader.scala b/src/main/scala/com/qubole/spark/hiveacid/reader/TableReader.scala
index 337e273..c5b879d 100644
--- a/src/main/scala/com/qubole/spark/hiveacid/reader/TableReader.scala
+++ b/src/main/scala/com/qubole/spark/hiveacid/reader/TableReader.scala
@@ -124,9 +124,9 @@ private[hiveacid] class TableReader(sparkSession: SparkSession,
       partitions)
   }
 
-  def getReader(requiredColumns: Array[String],
-                filters: Array[Filter],
-                readConf: SparkAcidConf): java.util.List[InputPartition[ColumnarBatch]] = {
+  def getPartitionsV2(requiredColumns: Array[String],
+                      filters: Array[Filter],
+                      readConf: SparkAcidConf): java.util.List[InputPartition[ColumnarBatch]] = {
     val reader = getTableReader(requiredColumns, filters, readConf)
     if (hiveAcidMetadata.isPartitioned) {
       logDebug("getReader for Partitioned table")