Tree imports

TreeImport.scala

// Source: https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/subquery.scala#L23-L29

// ## Current Style

import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.catalyst.{expressions, InternalRow}
import org.apache.spark.sql.catalyst.expressions.{Expression, ExprId, InSet, Literal, PlanExpression}
import org.apache.spark.sql.catalyst.expressions.codegen.{CodegenContext, ExprCode}
import org.apache.spark.sql.catalyst.rules.Rule
import org.apache.spark.sql.internal.SQLConf
import org.apache.spark.sql.types.{BooleanType, DataType, StructType}

// ## Relative

import org.apache.spark.sql.{SparkSession, catalyst, internal, types}
import catalyst.{expressions, InternalRow}
import catalyst.expressions.{Expression, ExprId, InSet, Literal, PlanExpression}
import catalyst.expressions.codegen.{CodegenContext, ExprCode}
import catalyst.rules.Rule
import internal.SQLConf
import types.{BooleanType, DataType, StructType}


// Good: works now
// Bad: name clash (org.example.internal vs org.apache.spark.sql.internal)

// ## Tree Import

import org.apache.spark.sql.{
  SparkSession,
  catalyst.{
    expressions,
    expressions.{
      Expression, ExprId, InSet, Literal, PlanExpression
      codegen.{CodegenContext, ExprCode}
    },
    rules.Rule,
    InternalRow
  },
  internal.SQLConf,
  types.{BooleanType, DataType, StructType}
}