another problem is : 1.i create table use phoenix client, 2.load data to Hbase by spoon kettle , 3,i can get data from phoenix client, 4 then i create index on cols, 5 load another group data to Hbase by spoon; 6 i can't get the new data in step 5; whether only use phoenix client to insert data can be got ?
------------------ Original ------------------ From: "rajeshbabu chintaguntla";<[email protected]>; Date: Thu, Oct 30, 2014 05:05 PM To: "[email protected]"<[email protected]>; Subject: RE: RE: how to use index for this query situation? Currently Phoenix doesn't have support of index merge or kind of that. I think you have created separate index on each column and your query has where clause with conditions on multiple columns. if we take any index which will not have all the columns in the where clause. That's why no index is used and going through full table scan. In such cases it's better to create multi-column index with the columns in where condition so that it will be used when you query. Thanks. Rajeshbabu. This e-mail and its attachments contain confidential information from HUAWEI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it! From: xuxc1120 [[email protected]] Sent: Thursday, October 30, 2014 1:52 PM To: user Subject: Re: RE: how to use index for this query situation? the where conditions are all have index,e.g (col2=1 and col3=1 . col1 to coln all have local indexes), when : select col2 from table where col2=1 and col3=1, it will full scan the table; only if one condition after "where" clause, it will scan the index_table; ------------------ Original ------------------ From: "rajeshbabu chintaguntla";<[email protected]>; Date: Thu, Oct 30, 2014 04:12 PM To: "[email protected]"<[email protected]>; Subject: RE: how to use index for this query situation? If you have where condition on non indexed column then we go for full table scan. Can you confirm this? Thanks. Rajeshbabu. This e-mail and its attachments contain confidential information from HUAWEI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it! From: xuxc1120 [[email protected]] Sent: Thursday, October 30, 2014 1:20 PM To: user Subject: how to use index for this query situation? table: each col with local index(col1......coln), when i select data such as : select col1,col2 from table where col1="test", the index works, but if there are 2 or more conditions after "where" clause,the query will full scan the table; is there any way to use index for such query? thanks. xuxc
