nsivabalan commented on a change in pull request #2651:
URL: https://github.com/apache/hudi/pull/2651#discussion_r590522313



##########
File path: 
hudi-spark-datasource/hudi-spark/src/main/scala/org/apache/hudi/DefaultSource.scala
##########
@@ -66,10 +69,15 @@ class DefaultSource extends RelationProvider
   override def createRelation(sqlContext: SQLContext,
                               optParams: Map[String, String],
                               schema: StructType): BaseRelation = {
+    val path = removeStar(optParams.get("path"))

Review comment:
       minor. can we add a comment here as to what this does. something like
   ```Translates path from "/basepath/*/*/*/*" or "/basepath/*/*" to 
"/basepath/" if applicable``` 

##########
File path: 
hudi-spark-datasource/hudi-spark/src/main/scala/org/apache/hudi/DefaultSource.scala
##########
@@ -79,40 +87,64 @@ class DefaultSource extends RelationProvider
     val allPaths = path.map(p => Seq(p)).getOrElse(Seq()) ++ readPaths
 
     val fs = FSUtils.getFs(allPaths.head, 
sqlContext.sparkContext.hadoopConfiguration)
-    val globPaths = HoodieSparkUtils.checkAndGlobPathIfNecessary(allPaths, fs)
-
-    val tablePath = DataSourceUtils.getTablePath(fs, globPaths.toArray)
+    // Get the table base path
+    val tablePathOpt = TablePathUtils.getTablePath(fs, new Path(allPaths.head))
+    val tablePath = if (tablePathOpt.isPresent) {
+      tablePathOpt.get().toString
+    } else {
+      throw new HoodieException(s"Failed to get the table path, " +
+        s"Maybe ${allPaths.head} is not a hoodie table path")
+    }
     log.info("Obtained hudi table path: " + tablePath)
 
     val metaClient = 
HoodieTableMetaClient.builder().setConf(fs.getConf).setBasePath(tablePath).build()
     val isBootstrappedTable = 
metaClient.getTableConfig.getBootstrapBasePath.isPresent
-    log.info("Is bootstrapped table => " + isBootstrappedTable)
-
-    if (parameters(QUERY_TYPE_OPT_KEY).equals(QUERY_TYPE_SNAPSHOT_OPT_VAL)) {
-      if (metaClient.getTableType.equals(HoodieTableType.MERGE_ON_READ)) {
-        if (isBootstrappedTable) {
-          // Snapshot query is not supported for Bootstrapped MOR tables
-          log.warn("Snapshot query is not supported for Bootstrapped 
Merge-on-Read tables." +
-            " Falling back to Read Optimized query.")
-          new HoodieBootstrapRelation(sqlContext, schema, globPaths, 
metaClient, optParams)
-        } else {
-          new MergeOnReadSnapshotRelation(sqlContext, optParams, schema, 
globPaths, metaClient)
-        }
-      } else {
-        getBaseFileOnlyView(sqlContext, parameters, schema, readPaths, 
isBootstrappedTable, globPaths, metaClient)
-      }
-    } else 
if(parameters(QUERY_TYPE_OPT_KEY).equals(QUERY_TYPE_READ_OPTIMIZED_OPT_VAL)) {
-      getBaseFileOnlyView(sqlContext, parameters, schema, readPaths, 
isBootstrappedTable, globPaths, metaClient)
-    } else if 
(parameters(QUERY_TYPE_OPT_KEY).equals(QUERY_TYPE_INCREMENTAL_OPT_VAL)) {
-      val metaClient = 
HoodieTableMetaClient.builder().setConf(fs.getConf).setBasePath(tablePath).build()
-      if (metaClient.getTableType.equals(HoodieTableType.MERGE_ON_READ)) {
-        new MergeOnReadIncrementalRelation(sqlContext, optParams, schema, 
metaClient)
+    val tableType = metaClient.getTableType
+    val queryType = parameters(QUERY_TYPE_OPT_KEY)
+    log.info(s"Is bootstrapped table => $isBootstrappedTable, tableType is: 
$tableType")
+
+    (tableType, queryType, isBootstrappedTable) match {
+
+      case (COPY_ON_WRITE, QUERY_TYPE_SNAPSHOT_OPT_VAL, false) |
+           (COPY_ON_WRITE, QUERY_TYPE_READ_OPTIMIZED_OPT_VAL, false) |
+           (MERGE_ON_READ, QUERY_TYPE_READ_OPTIMIZED_OPT_VAL, false) =>
+        getBaseFileOnlyView(sqlContext, parameters, schema, tablePath, 
metaClient)
+
+      case (COPY_ON_WRITE, QUERY_TYPE_INCREMENTAL_OPT_VAL, _) =>

Review comment:
       can we move this to line 118. would be nice to have all incremental next 
to each other.

##########
File path: 
hudi-spark-datasource/hudi-spark/src/main/scala/org/apache/hudi/DefaultSource.scala
##########
@@ -66,10 +69,15 @@ class DefaultSource extends RelationProvider
   override def createRelation(sqlContext: SQLContext,
                               optParams: Map[String, String],
                               schema: StructType): BaseRelation = {
+    val path = removeStar(optParams.get("path"))
     // Add default options for unspecified read options keys.
-    val parameters = translateViewTypesToQueryTypes(optParams)
+    val parameters = if (path.isDefined) {
+      translateViewTypesToQueryTypes(optParams) + ("path" -> path.get)
+    } else {
+      translateViewTypesToQueryTypes(optParams)
+    }
+    // Remove the "*" from the path in order to be compatible with the 
previous query path with "*"

Review comment:
       shouldn't this comment go to line 72? 

##########
File path: 
hudi-spark-datasource/hudi-spark/src/main/scala/org/apache/hudi/DefaultSource.scala
##########
@@ -79,40 +87,64 @@ class DefaultSource extends RelationProvider
     val allPaths = path.map(p => Seq(p)).getOrElse(Seq()) ++ readPaths
 
     val fs = FSUtils.getFs(allPaths.head, 
sqlContext.sparkContext.hadoopConfiguration)
-    val globPaths = HoodieSparkUtils.checkAndGlobPathIfNecessary(allPaths, fs)
-
-    val tablePath = DataSourceUtils.getTablePath(fs, globPaths.toArray)
+    // Get the table base path
+    val tablePathOpt = TablePathUtils.getTablePath(fs, new Path(allPaths.head))
+    val tablePath = if (tablePathOpt.isPresent) {
+      tablePathOpt.get().toString
+    } else {
+      throw new HoodieException(s"Failed to get the table path, " +
+        s"Maybe ${allPaths.head} is not a hoodie table path")
+    }
     log.info("Obtained hudi table path: " + tablePath)
 
     val metaClient = 
HoodieTableMetaClient.builder().setConf(fs.getConf).setBasePath(tablePath).build()
     val isBootstrappedTable = 
metaClient.getTableConfig.getBootstrapBasePath.isPresent
-    log.info("Is bootstrapped table => " + isBootstrappedTable)
-
-    if (parameters(QUERY_TYPE_OPT_KEY).equals(QUERY_TYPE_SNAPSHOT_OPT_VAL)) {
-      if (metaClient.getTableType.equals(HoodieTableType.MERGE_ON_READ)) {
-        if (isBootstrappedTable) {
-          // Snapshot query is not supported for Bootstrapped MOR tables
-          log.warn("Snapshot query is not supported for Bootstrapped 
Merge-on-Read tables." +
-            " Falling back to Read Optimized query.")
-          new HoodieBootstrapRelation(sqlContext, schema, globPaths, 
metaClient, optParams)
-        } else {
-          new MergeOnReadSnapshotRelation(sqlContext, optParams, schema, 
globPaths, metaClient)
-        }
-      } else {
-        getBaseFileOnlyView(sqlContext, parameters, schema, readPaths, 
isBootstrappedTable, globPaths, metaClient)
-      }
-    } else 
if(parameters(QUERY_TYPE_OPT_KEY).equals(QUERY_TYPE_READ_OPTIMIZED_OPT_VAL)) {
-      getBaseFileOnlyView(sqlContext, parameters, schema, readPaths, 
isBootstrappedTable, globPaths, metaClient)
-    } else if 
(parameters(QUERY_TYPE_OPT_KEY).equals(QUERY_TYPE_INCREMENTAL_OPT_VAL)) {
-      val metaClient = 
HoodieTableMetaClient.builder().setConf(fs.getConf).setBasePath(tablePath).build()
-      if (metaClient.getTableType.equals(HoodieTableType.MERGE_ON_READ)) {
-        new MergeOnReadIncrementalRelation(sqlContext, optParams, schema, 
metaClient)
+    val tableType = metaClient.getTableType
+    val queryType = parameters(QUERY_TYPE_OPT_KEY)
+    log.info(s"Is bootstrapped table => $isBootstrappedTable, tableType is: 
$tableType")
+
+    (tableType, queryType, isBootstrappedTable) match {
+
+      case (COPY_ON_WRITE, QUERY_TYPE_SNAPSHOT_OPT_VAL, false) |
+           (COPY_ON_WRITE, QUERY_TYPE_READ_OPTIMIZED_OPT_VAL, false) |

Review comment:
       can we do (_, QUERY_TYPE_READ_OPTIMIZED_OPT_VAL, false) here? 

##########
File path: 
hudi-common/src/main/java/org/apache/hudi/common/table/HoodieTableConfig.java
##########
@@ -258,4 +268,5 @@ public String getArchivelogFolder() {
   public Properties getProperties() {
     return props;
   }
+

Review comment:
       why extra line ?




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