Top "Database-scan" questions

HBase (Easy): How to Perform Range Prefix Scan in hbase shell

I am designing an app to run on hbase and want to interactively explore the contents of my cluster. I …

hbase database-scan hbase-shell
Why does PostgreSQL perform sequential scan on indexed column?

Very simple example - one table, one index, one query: CREATE TABLE book ( id bigserial NOT NULL, "year" integer, -- …

postgresql indexing sequence database-scan
Why oracle CHOOSE INDEX RANGE SCAN over FAST FULL INDEX SCAN

I have read some documentation about indexes, I did some examples and now I have some doubts. I create a …

oracle indexing range database-scan
Should I use prefixfilter or rowkey range scan in HBase

I don't know why it's very slow if I use prefixfilter to query. Can someone explain which is the best …

performance filter hbase database-scan
HBase Scan Performance

I am performing a range scan that is giving me 500k records. If I set scan.setCaching(100000) it took less …

caching hadoop hbase database-scan
Using Scan in HBase with start row, end row and a filter

I need to use a Scan in HBase for scanning all rows that meet certain criteria: that's the reason why …

java hbase database-scan
hbase shell command - scan and Filter

I am pretty new to Hadoop and hbase. Can anybody help me with the scan and filter command. I was …

shell filter command hbase database-scan
hbase scan timerange return old version

I have one question about hbase scan by using timerange. I create a 'test' table,it has one family 'cf' …

filter hbase version database-scan
HBase: How to fetch rows using row key range if row key is stored as byte array value

We are using HBase for storing data which is sqooped from oracle to hdfs. Here we designed the row key …

hbase database-scan
How to apply several QualifierFilter to a row in HBase

we would like to filter a scan on a HBase table with two QualifierFilters. Means we would like to only …

filter hbase database-scan