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https://issues.apache.org/jira/browse/FLINK-24862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17441744#comment-17441744
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Jark Wu commented on FLINK-24862:
---------------------------------
AFAIK, create temporary function for hive functions is not supported. You can
try to remove the "temporary" keyword which should work.
> The user-defined hive udaf/udtf cannot be used normally in hive dialect
> -----------------------------------------------------------------------
>
> Key: FLINK-24862
> URL: https://issues.apache.org/jira/browse/FLINK-24862
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Hive
> Affects Versions: 1.13.0, 1.14.0
> Reporter: xiangqiao
> Priority: Major
> Attachments: image-2021-11-10-20-55-11-988.png,
> image-2021-11-10-21-04-32-660.png
>
>
> Here are two questions：
> 1.First question, I added a unit test in HiveDialectITCase to reproduce this
> question:
> {code:java}
> @Test
> public void testTemporaryFunctionUDAF() throws Exception {
> // create temp function
> tableEnv.executeSql(
> String.format(
> "create temporary function temp_count as '%s'",
> GenericUDAFCount.class.getName()));
> String[] functions = tableEnv.listUserDefinedFunctions();
> assertArrayEquals(new String[] {"temp_count"}, functions);
> // call the function
> tableEnv.executeSql("create table src(x int)");
> tableEnv.executeSql("insert into src values (1),(-1)").await();
> assertEquals(
> "[+I[2]]",
> queryResult(tableEnv.sqlQuery("select temp_count(x) from
> src")).toString());
> // switch DB and the temp function can still be used
> tableEnv.executeSql("create database db1");
> tableEnv.useDatabase("db1");
> assertEquals(
> "[+I[2]]",
> queryResult(tableEnv.sqlQuery("select temp_count(x) from
> `default`.src"))
> .toString());
> // drop the function
> tableEnv.executeSql("drop temporary function temp_count");
> functions = tableEnv.listUserDefinedFunctions();
> assertEquals(0, functions.length);
> tableEnv.executeSql("drop temporary function if exists foo");
> } {code}
> !image-2021-11-10-20-55-11-988.png!
> 2.When I solved the first problem, I met the second problem，I added a unit
> test in HiveDialectITCase to reproduce this question:
> This is the compatibility of hive udtf. Refer to this
> issue：https://issues.apache.org/jira/browse/HIVE-5737
> {code:java}
> @Test
> public void testTemporaryFunctionUDTFInitializeWithStructObjectInspector()
> throws Exception {
> // create temp function
> tableEnv.executeSql(
> String.format(
> "create temporary function temp_split as '%s'",
>
> HiveGenericUDTFTest.TestSplitUDTFInitializeWithStructObjectInspector.class
> .getName()));
> String[] functions = tableEnv.listUserDefinedFunctions();
> assertArrayEquals(new String[] {"temp_split"}, functions);
> // call the function
> tableEnv.executeSql("create table src(x string)");
> tableEnv.executeSql("insert into src values ('a,b,c')").await();
> assertEquals(
> "[+I[a], +I[b], +I[c]]",
> queryResult(tableEnv.sqlQuery("select temp_split(x) from
> src")).toString());
> // switch DB and the temp function can still be used
> tableEnv.executeSql("create database db1");
> tableEnv.useDatabase("db1");
> assertEquals(
> "[+I[a], +I[b], +I[c]]",
> queryResult(tableEnv.sqlQuery("select temp_split(x) from
> `default`.src"))
> .toString());
> // drop the function
> tableEnv.executeSql("drop temporary function temp_split");
> functions = tableEnv.listUserDefinedFunctions();
> assertEquals(0, functions.length);
> tableEnv.executeSql("drop temporary function if exists foo");
> } {code}
> !image-2021-11-10-21-04-32-660.png!
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