bowenliang123 commented on code in PR #7153:
URL: https://github.com/apache/iceberg/pull/7153#discussion_r1144160631
##########
spark/v3.2/spark/src/test/java/org/apache/iceberg/spark/TestSparkSessionCatalog.java:
##########
@@ -86,4 +87,26 @@ public void testValidateHmsUri() {
.defaultNamespace()[0]
.equals("default"));
}
+
+ @Test
+ public void testLoadFunction() {
+ String envHmsUriKey = "spark.hadoop." + METASTOREURIS.varname;
+ String catalogHmsUriKey = "spark.sql.catalog.spark_catalog.uri";
+ String hmsUri = hiveConf.get(METASTOREURIS.varname);
+
+ spark
+ .conf()
+ .set("spark.sql.catalog.spark_catalog",
"org.apache.iceberg.spark.SparkSessionCatalog");
+ spark.conf().set("spark.sql.catalog.spark_catalog.type", "hive");
+
+ spark.sessionState().catalogManager().reset();
+ spark.conf().set(envHmsUriKey, hmsUri);
+ spark.conf().set(catalogHmsUriKey, hmsUri);
+
+ String functionClass =
"org.apache.hadoop.hive.ql.udf.generic.GenericUDFUpper";
+ String createFuncSql = String.format("CREATE FUNCTION upper AS '%s'",
functionClass);
+ spark.sql(createFuncSql);
+ Row[] rows = (Row[]) spark.sql("SELECT upper('xyz')").collect();
+ Assert.assertEquals("XYZ", rows[0].get(0));
+ }
Review Comment:
After checking twice, an existed problem occurs, as Iceberg's
SparkSessionCatalog is not able to load Iceberg's built-in functions correctly.
Even without (or with) this PR, `SELECT system.years(date('1970-01-01'))` fails.
```
Undefined function: 'years'. This function is neither a registered temporary
function nor a permanent function registered in the database 'system'.; line 1
pos 7
org.apache.spark.sql.AnalysisException: Undefined function: 'years'. This
function is neither a registered temporary function nor a permanent function
registered in the database 'system'.; line 1 pos 7
at
org.apache.spark.sql.catalyst.catalog.SessionCatalog.failFunctionLookup(SessionCatalog.scala:1561)
at
org.apache.spark.sql.catalyst.catalog.SessionCatalog.resolvePersistentFunctionInternal(SessionCatalog.scala:1704)
at
org.apache.spark.sql.catalyst.catalog.SessionCatalog.resolvePersistentFunction(SessionCatalog.scala:1673)
at
org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveFunctions$.org$apache$spark$sql$catalyst$analysis$Analyzer$ResolveFunctions$$resolveV1Function(Analyzer.scala:2168)
at
org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveFunctions$$anonfun$apply$25$$anonfun$applyOrElse$101.$anonfun$applyOrElse$107(Analyzer.scala:2118)
```
An it's not covered or fixed by this PR, since this PR is implementing
methods of Spark's `FunctionCatalog` which correctly loads Iceberg's built-in
functions (confirmed in debugging). But the problem comes with Spark's
`org.apache.spark.sql.catalyst.catalog.SessionCatalog.resolvePersistentFunction`.
So I have to add a todo here in unit tests. And I will report an issue for
this later.
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