[HIVE-7762] Enhancement while getting partitions via webhcat client

• Type: Improvement
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Component/s: WebHCat
• Assignee: Unassigned
• Reporter: Suhas Vasu
• Created: 18/Aug/14 09:31
• Updated: 11/Nov/14 10:24

Description

Hcatalog creates partitions in lower case, whereas getting partitions from hcatalog via webhcat client doesn't handle this. So the client starts throwing exceptions.
Ex:
CREATE EXTERNAL TABLE in_table (word STRING, cnt INT) PARTITIONED BY (Year STRING, Month STRING, Date STRING, Hour STRING, Minute STRING) STORED AS TEXTFILE LOCATION '/user/suhas/hcat-data/in/';

Then i try to get partitions by:

        String inputTableName = "in_table";
        String database = "default";

        Map<String, String> partitionSpec = new HashMap<String, String>();
        partitionSpec.put("Year", "2014");
        partitionSpec.put("Month", "08");
        partitionSpec.put("Date", "11");
        partitionSpec.put("Hour", "00");
        partitionSpec.put("Minute", "00");

        HCatClient client = get(catalogUrl);
        HCatPartition hCatPartition = client.getPartition(database, inputTableName, partitionSpec);

This throws up saying:

Exception in thread "main" org.apache.hcatalog.common.HCatException : 9001 : Exception occurred while processing HCat request : Invalid partition-key specified: year
	at org.apache.hcatalog.api.HCatClientHMSImpl.getPartition(HCatClientHMSImpl.java:366)
	at com.inmobi.demo.HcatPartitions.main(HcatPartitions.java:34)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)

The same code works if i do

        partitionSpec.put("year", "2014");
        partitionSpec.put("month", "08");
        partitionSpec.put("date", "11");
        partitionSpec.put("hour", "00");
        partitionSpec.put("minute", "00");