Hi , impala dev! Can you help me to implement approx_percentile.
Impala UDAF: https://github.com/cloudera/impala-udf-samples Like: https://impala.apache.org/docs/build/html/topics/impala_appx_median.html SQL Like: select approx_percentile(c1, 0.1) from test_table; Python Like: import numpy as np a = np.array([1,2,3,4,5,6,7,8,9,10]) print(np.median(a)) print(np.percentile(a,10)) print(np.percentile(a,20)) print(np.percentile(a,30)) print(np.percentile(a,40)) print(np.percentile(a,50)) print(np.percentile(a,60)) print(np.percentile(a,70)) print(np.percentile(a,80)) print(np.percentile(a,90)) Thank you very much.
