Details
Major Description
Steps:
1. Create table and load with large data
create table if not exists lineitem4(L_SHIPDATE string,L_SHIPMODE string,L_SHIPINSTRUCT string,L_RETURNFLAG string,L_RECEIPTDATE string,L_ORDERKEY string,L_PARTKEY string,L_SUPPKEY string,L_LINENUMBER int,L_QUANTITY double,L_EXTENDEDPRICE double,L_DISCOUNT double,L_TAX double,L_LINESTATUS string,L_COMMITDATE string,L_COMMENT string) STORED BY 'org.apache.carbondata.format' TBLPROPERTIES ('table_blocksize'='128','NO_INVERTED_INDEX'='L_SHIPDATE,L_SHIPMODE,L_SHIPINSTRUCT,L_RETURNFLAG,L_RECEIPTDATE,L_ORDERKEY,L_PARTKEY,L_SUPPKEY','sort_columns'='');
load data inpath "hdfs://hacluster/user/test/lineitem.tbl.1" into table lineitem4 options('DELIMITER'='|','FILEHEADER'='L_ORDERKEY,L_PARTKEY,L_SUPPKEY,L_LINENUMBER,L_QUANTITY,L_EXTENDEDPRICE,L_DISCOUNT,L_TAX,L_RETURNFLAG,L_LINESTATUS,L_SHIPDATE,L_COMMITDATE,L_RECEIPTDATE,L_SHIPINSTRUCT,L_SHIPMODE,L_COMMENT');
2. Create a pre-aggregate table
create datamap agr_lineitem4 ON TABLE lineitem4 USING "org.apache.carbondata.datamap.AggregateDataMapHandler" as select L_RETURNFLAG,L_LINESTATUS,sum(L_QUANTITY),sum(L_EXTENDEDPRICE) from lineitem4 group by L_RETURNFLAG, L_LINESTATUS;
3. Run aggregate query at the same time
select l_returnflag,l_linestatus,sum(l_quantity),sum(l_extendedprice) from lineitem4 group by l_returnflag, l_linestatus;
Expected:: aggregate query should fetch data either from main table or pre-aggregate table.
Actual: aggregate query does not return data until the pre-aggregate table is created
0: jdbc:hive2://10.18.98.48:23040> select l_returnflag,l_linestatus,sum(l_quantity),sum(l_extendedprice) from lineitem4 group by l_returnflag, l_linestatus;
-----------------------------------------------------------------
| l_returnflag | l_linestatus | sum(l_quantity) | sum(l_extendedprice) |
-----------------------------------------------------------------
-----------------------------------------------------------------
No rows selected (1.74 seconds)
0: jdbc:hive2://10.18.98.48:23040> select l_returnflag,l_linestatus,sum(l_quantity),sum(l_extendedprice) from lineitem4 group by l_returnflag, l_linestatus;
-----------------------------------------------------------------
| l_returnflag | l_linestatus | sum(l_quantity) | sum(l_extendedprice) |
-----------------------------------------------------------------
-----------------------------------------------------------------
No rows selected (0.746 seconds)
0: jdbc:hive2://10.18.98.48:23040> select l_returnflag,l_linestatus,sum(l_quantity),sum(l_extendedprice) from lineitem4 group by l_returnflag, l_linestatus;
------------------------------------------------------------------
| l_returnflag | l_linestatus | sum(l_quantity) | sum(l_extendedprice) |
------------------------------------------------------------------
| N | F | 2.9808092E7 | 4.471079473931997E10 |
| A | F | 1.145546488E9 | 1.717580824169429E12 |
| N | O | 2.31980219E9 | 3.4789002701143467E12 |
| R | F | 1.146403932E9 | 1.7190627928317903E12 |
------------------------------------------------------------------
4 rows selected (0.8 seconds)
0: jdbc:hive2://10.18.98.48:23040> select l_returnflag,l_linestatus,sum(l_quantity),sum(l_extendedprice) from lineitem4 group by l_returnflag, l_linestatus;
------------------------------------------------------------------
| l_returnflag | l_linestatus | sum(l_quantity) | sum(l_extendedprice) |
------------------------------------------------------------------
| N | F | 2.9808092E7 | 4.471079473931997E10 |
| A | F | 1.145546488E9 | 1.717580824169429E12 |
| N | O | 2.31980219E9 | 3.4789002701143467E12 |
| R | F | 1.146403932E9 | 1.7190627928317903E12 |
------------------------------------------------------------------
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