I have used a query in Oracle DB to produce the list of tables in a database along with its owner and respective table size. Here is the sample query i have shared.
select owner, table_name, round((num_rows*avg_row_len)/(1024*1024)) MB
from all_tables
where owner not like 'SYS%' -- Exclude system tables.
and num_rows > 0 -- Ignore empty Tables.
order by MB desc -- Biggest first.
I want the similar output from Impala/Hive.
Note: I tried show table stats <table_name> which will show the stats for individual table. But i want to get all the table stats in one go. Can someone help me in this.
CLI
show table extended like '.*'
tableName:t100k
owner:cloudera
location:file:/home/cloudera/local/t100k
inputformat:org.apache.hadoop.mapred.TextInputFormat
outputformat:org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
columns:struct columns { i32 i}
partitioned:false
partitionColumns:
totalNumberFiles:1
totalFileSize:588895
maxFileSize:588895
minFileSize:588895
lastAccessTime:0
lastUpdateTime:1492675975000
tableName:t10k
owner:cloudera
location:file:/home/cloudera/local/t10k
inputformat:org.apache.hadoop.mapred.TextInputFormat
outputformat:org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
columns:struct columns { i32 i}
partitioned:false
partitionColumns:
totalNumberFiles:1
totalFileSize:48894
maxFileSize:48894
minFileSize:48894
lastAccessTime:0
lastUpdateTime:1492675978000
tableName:t1k
owner:cloudera
location:file:/home/cloudera/local/t1k
inputformat:org.apache.hadoop.mapred.TextInputFormat
outputformat:org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
columns:struct columns { i32 i}
partitioned:false
partitionColumns:
totalNumberFiles:1
totalFileSize:3893
maxFileSize:3893
minFileSize:3893
lastAccessTime:0
lastUpdateTime:1492675983000
tableName:t1m
owner:cloudera
location:file:/home/cloudera/local/t1m
inputformat:org.apache.hadoop.mapred.TextInputFormat
outputformat:org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
columns:struct columns { i32 i}
partitioned:false
partitionColumns:
totalNumberFiles:1
totalFileSize:6888896
maxFileSize:6888896
minFileSize:6888896
lastAccessTime:0
lastUpdateTime:1492675968000
Metastore (e.g. MySql)
select d.name as db_name
,t.tbl_name as tbl_name
,from_unixtime(min(t.create_time)) as create_time
,min(t.owner) as owner
,min(case when tp.param_key = 'COLUMN_STATS_ACCURATE' then tp.param_value end) as COLUMN_STATS_ACCURATE
,min(case when tp.param_key = 'last_modified_by' then tp.param_value end) as last_modified_by
,min(case when tp.param_key = 'last_modified_time' then from_unixtime(tp.param_value) end) as last_modified_time
,min(case when tp.param_key = 'numFiles' then tp.param_value end) as numFiles
,min(case when tp.param_key = 'numRows' then tp.param_value end) as numRows
,min(case when tp.param_key = 'rawDataSize' then tp.param_value end) as rawDataSize
,min(case when tp.param_key = 'totalSize' then tp.param_value end) as totalSize
,min(case when tp.param_key = 'transient_lastDdlTime' then from_unixtime(tp.param_value) end) as transient_lastDdlTime
from metastore.DBS as d
join metastore.TBLS as t
on t.db_id = d.db_id
join metastore.TABLE_PARAMS as tp
on tp.tbl_id = t.tbl_id
group by d.name
,t.tbl_name
order by d.name
,t.tbl_name
+---------+----------+---------------------+----------+-----------------------+------------------+---------------------+----------+---------+-------------+-----------+-----------------------+
| db_name | tbl_name | create_time | owner | COLUMN_STATS_ACCURATE | last_modified_by | last_modified_time | numFiles | numRows | rawDataSize | totalSize | transient_lastDdlTime |
+---------+----------+---------------------+----------+-----------------------+------------------+---------------------+----------+---------+-------------+-----------+-----------------------+
| local | t100k | 2017-04-19 23:25:20 | cloudera | true | cloudera | 2017-04-19 23:27:28 | 1 | 100000 | 488895 | 588895 | 2017-04-20 01:12:55 |
| local | t10k | 2017-04-19 23:25:26 | cloudera | true | cloudera | 2017-04-19 23:27:26 | 1 | 10000 | 38894 | 48894 | 2017-04-20 01:12:58 |
| local | t1k | 2017-04-19 23:25:30 | cloudera | true | cloudera | 2017-04-19 23:27:22 | 1 | 1000 | 2893 | 3893 | 2017-04-20 01:13:03 |
| local | t1m | 2017-04-19 23:20:59 | cloudera | true | cloudera | 2017-04-19 23:27:30 | 1 | 1000000 | 5888896 | 6888896 | 2017-04-20 01:12:48 |
+---------+----------+---------------------+----------+-----------------------+------------------+---------------------+----------+---------+-------------+-----------+-----------------------+