Github user sunjincheng121 commented on a diff in the pull request:
https://github.com/apache/flink/pull/4536#discussion_r135425326
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/functions/utils/TableSqlFunction.scala
---
@@ -18,39 +18,40 @@
package org.apache.flink.table.functions.utils
-import com.google.common.base.Predicate
import org.apache.calcite.rel.`type`.RelDataType
import org.apache.calcite.sql._
import org.apache.calcite.sql.`type`._
import org.apache.calcite.sql.parser.SqlParserPos
import org.apache.calcite.sql.validate.SqlUserDefinedTableFunction
-import org.apache.calcite.util.Util
import org.apache.flink.api.common.typeinfo.TypeInformation
import org.apache.flink.table.calcite.FlinkTypeFactory
-import org.apache.flink.table.functions.TableFunction
+import org.apache.flink.table.functions.{ScalarFunction, TableFunction}
import org.apache.flink.table.plan.schema.FlinkTableFunctionImpl
import scala.collection.JavaConverters._
import java.util
+import org.apache.calcite.sql.`type`.SqlOperandTypeChecker.Consistency
+import org.apache.flink.api.java.typeutils.TypeExtractor
--- End diff --
I suggest that format the import order, i.e.:
**calcite**
**calcite**
**flink.api**
**flink.api**
**flink.table**
**flink.talbe**
What do you think?
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