kasakrisz commented on code in PR #5498:
URL: https://github.com/apache/hive/pull/5498#discussion_r1810265995
##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/IcebergTableUtil.java:
##########
@@ -129,19 +129,19 @@ public static Table getTable(Configuration configuration,
org.apache.hadoop.hive
*/
static Table getTable(Configuration configuration, Properties properties,
boolean skipCache) {
String metaTable =
properties.getProperty(IcebergAcidUtil.META_TABLE_PROPERTY);
- String tableName = properties.getProperty(Catalogs.NAME);
- String location = properties.getProperty(Catalogs.LOCATION);
+ Properties props = (metaTable != null) ? new Properties() : properties;
+
if (metaTable != null) {
+ props.computeIfAbsent(InputFormatConfig.CATALOG_NAME, properties::get);
// HiveCatalog, HadoopCatalog uses NAME to identify the metadata table
- properties.setProperty(Catalogs.NAME, tableName + "." + metaTable);
+ props.computeIfAbsent(Catalogs.NAME, k -> properties.get(k) + "." +
metaTable);
// HadoopTable uses LOCATION to identify the metadata table
- properties.setProperty(Catalogs.LOCATION, location + "#" + metaTable);
+ props.computeIfAbsent(Catalogs.LOCATION, k -> properties.get(k) + "#" +
metaTable);
}
Review Comment:
These are the `if`s in new code:
* `(metaTable != null) ? new Properties() : properties`
* `if (metaTable != null) { ... }`
* 3 `computeIfAbsent` calls
When `metaTable` present a new empty `Properties` instance is created and
`computeIfAbsent` is always absent.
Ternary operator is one line but it still an if-else with the same condition
like the follow-up if statement.
I agree that the side affect you mentioned should be fixed. It can be
achieved by only one if statement:
```
Properties props;
if (metaTable != null) {
props = new Properties();
props.put(InputFormatConfig.CATALOG_NAME,
properties.get(InputFormatConfig.CATALOG_NAME));
props.put(Catalogs.NAME, properties.get(Catalogs.NAME) + "." +
metaTable);
props.put(Catalogs.LOCATION, properties.get(Catalogs.LOCATION) + "#" +
metaTable);
} else {
props = properties;
}
```
The else block can also be removed:
```
Properties props = new Properties(properties); // use input properties as
default
if (metaTable != null) {
...
}
```
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