Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3829#discussion_r127449330
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/TableEnvironment.scala
---
@@ -488,19 +499,50 @@ abstract class TableEnvironment(val config:
TableConfig) {
* tEnv.sql(s"SELECT * FROM $table")
* }}}
*
- * @param query The SQL query to evaluate.
- * @return The result of the query as Table.
+ * @param sql The SQL string to evaluate.
+ * @return The result of the query as Table or null of the DML insert
operation.
*/
- def sql(query: String): Table = {
+ def sql(sql: String): Table = {
--- End diff --
I'm not sure if we should add this functionality to the `sql()` method. The
`sql()` method returns a `Table` which I would not expect if I define an
`INSERT INTO` statement. Returning `null` is not a good idea in my opinion.
I would rather add a new method maybe called `sqlInsert()`. The method
would check the query type and could also give a meaningful error message with
a hint of which method should be used instead.
What do you think @lincoln-lil?
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