Operator          #Hosts   Avg Time   Max Time  #Rows  Est. #Rows   Peak Mem  Est. Peak Mem  Detail                         
----------------------------------------------------------------------------------------------------------------------------
08:EXCHANGE            0        0ns        0ns      0           1          0        -1.00 B  UNPARTITIONED                  
07:AGGREGATE          18  184.785ms   342.20ms      0           1    6.25 MB       10.00 MB  FINALIZE                       
06:EXCHANGE           18        0ns        0ns      0           1          0              0  HASH(ca_country)               
03:AGGREGATE          18  168.207ms  348.667ms      0           1   11.19 MB       10.00 MB                                 
02:HASH JOIN          18   26s556ms      7m52s  5.15B       3.85M  580.60 MB        2.79 MB  INNER JOIN, PARTITIONED        
|--05:EXCHANGE        18    7.628ms    135.6ms  1.93M       1.93M          0              0  HASH(upper(ca_country))        
|  00:SCAN HDFS       17  182.326ms  352.434ms  1.93M       1.93M   25.42 MB       48.00 MB  tpcds_15000_decimal_parquet... 
04:EXCHANGE           18    4.376ms    6.458ms  3.60M       3.85M          0              0  HASH(c_birth_country)          
01:SCAN HDFS          18     4.85ms    6.764ms  3.85M       3.85M    8.75 MB       24.00 MB  tpcds_15000_decimal_parquet...