[SPARK-37370][SQL] Add SQL configs to control newly added join code-g…

…en in 3.3

### What changes were proposed in this pull request?

During Spark 3.3, we added code-gen for FULL OUTER shuffled hash join, FULL OUTER sort merge join, and Existence sort merge join. Given the join test coverage is not high, and we would love to avoid any upcoming release regression due to it. So here we introduce three internal configs to allow users and developers to disable code-gen in case we found any bug after release.

### Why are the changes needed?

Allow users for quick mitigation in case any bug found. Avoid release regression.

### Does this PR introduce _any_ user-facing change?

Yes, three internal configs to control each join. By default they are true, so code-gen is enabled.

### How was this patch tested?

Only added configs here, so rely on existing tests.

Closes #34643 from c21/join-config.

Authored-by: Cheng Su <chengsu@fb.com>
Signed-off-by: Wenchen Fan <wenchen@databricks.com>

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

@@ -1765,6 +1765,30 @@ object SQLConf {
       .booleanConf
       .createWithDefault(true)
 
+  val ENABLE_FULL_OUTER_SHUFFLED_HASH_JOIN_CODEGEN =
+    buildConf("spark.sql.codegen.join.fullOuterShuffledHashJoin.enabled")
+      .internal()
+      .doc("When true, enable code-gen for FULL OUTER shuffled hash join.")
+      .version("3.3.0")
+      .booleanConf
+      .createWithDefault(true)
+
+  val ENABLE_FULL_OUTER_SORT_MERGE_JOIN_CODEGEN =
+    buildConf("spark.sql.codegen.join.fullOuterSortMergeJoin.enabled")
+      .internal()
+      .doc("When true, enable code-gen for FULL OUTER sort merge join.")
+      .version("3.3.0")
+      .booleanConf
+      .createWithDefault(true)
+
+  val ENABLE_EXISTENCE_SORT_MERGE_JOIN_CODEGEN =
+    buildConf("spark.sql.codegen.join.existenceSortMergeJoin.enabled")
+      .internal()
+      .doc("When true, enable code-gen for Existence sort merge join.")
+      .version("3.3.0")
+      .booleanConf
+      .createWithDefault(true)
+
   val MAX_NESTED_VIEW_DEPTH =
     buildConf("spark.sql.view.maxNestedViewDepth")
       .internal()

sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashJoinExec.scala

@@ -29,6 +29,7 @@ import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.sql.execution.{RowIterator, SparkPlan}
 import org.apache.spark.sql.execution.metric.{SQLMetric, SQLMetrics}
+import org.apache.spark.sql.internal.SQLConf
 import org.apache.spark.util.collection.{BitSet, OpenHashSet}
 
 /**
@@ -311,6 +312,11 @@ case class ShuffledHashJoinExec(
     streamResultIter ++ buildResultIter
   }
 
+  override def supportCodegen: Boolean = joinType match {
+    case FullOuter => conf.getConf(SQLConf.ENABLE_FULL_OUTER_SHUFFLED_HASH_JOIN_CODEGEN)
+    case _ => true
+  }
+
   override def inputRDDs(): Seq[RDD[InternalRow]] = {
     streamedPlan.execute() :: buildPlan.execute() :: Nil
   }

sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala

@@ -28,6 +28,7 @@ import org.apache.spark.sql.catalyst.expressions.codegen.Block._
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.execution._
 import org.apache.spark.sql.execution.metric.{SQLMetric, SQLMetrics}
+import org.apache.spark.sql.internal.SQLConf
 import org.apache.spark.sql.types.BooleanType
 import org.apache.spark.util.collection.BitSet
 
@@ -376,6 +377,12 @@ case class SortMergeJoinExec(
   private lazy val streamedOutput = streamedPlan.output
   private lazy val bufferedOutput = bufferedPlan.output
 
+  override def supportCodegen: Boolean = joinType match {
+    case FullOuter => conf.getConf(SQLConf.ENABLE_FULL_OUTER_SORT_MERGE_JOIN_CODEGEN)
+    case _: ExistenceJoin => conf.getConf(SQLConf.ENABLE_EXISTENCE_SORT_MERGE_JOIN_CODEGEN)
+    case _ => true
+  }
+
   override def inputRDDs(): Seq[RDD[InternalRow]] = {
     streamedPlan.execute() :: bufferedPlan.execute() :: Nil
   }