i see coulmn stats and row stats is unavaialble in impala query. can i know what exactly this means?
partitions=1/1 files=200 size=8.77GB stats-rows=unavailable extrapolated-rows=disabled table stats: rows=unavailable size=8.77GB column stats: unavailable
Impala requires statistics about the data in your table so that it can optimise query plans for most efficient execution.
You should generally run "compute stats" on your tables after loading data into them or after the data has changed significantly. For more details I'd recommend our docs, which have more information than I could fit in this reply