Question

如何检查HIVE中是否存在任何特定分区：

我的hive表中有分区，如下所示：

国=印度/状态= MH 国= US /状态= NY

我想检查国家/地区是否＆＃34;某事和状态=＆＃34;某事＆＃34;是否存在于HIVE或使用shell脚本。请帮助

Answer 1

desc mytable partition（...）
show table extended mytable partition（...）

使用hive -e '...'

演示

create table mytable (i int) 
partitioned by (year int,month tinyint,day tinyint)
;

insert into mytable partition(year,month,day) values (1,2017,3,29)
;

hive> desc mytable partition (year=2017,month=3,day=29);
OK
i                       int                                         
year                    int                                         
month                   tinyint                                     
day                     tinyint                                     

# Partition Information      
# col_name              data_type               comment             

year                    int                                         
month                   tinyint                                     
day                     tinyint        

hive> desc mytable partition (year=2017,month=4,day=1);
FAILED: SemanticException [Error 10006]: Partition not found {year=2017, month=4, day=1}


hive> show table extended like mytable partition (year=2017,month=3,day=29);
OK
tableName:mytable
owner:cloudera
location:hdfs://quickstart.cloudera:8020/user/hive/warehouse/mytable/year=2017/month=3/day=29
inputformat:org.apache.hadoop.mapred.TextInputFormat
outputformat:org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
columns:struct columns { i32 i}
partitioned:true
partitionColumns:struct partition_columns { i32 year, byte month, byte day}
totalNumberFiles:1
totalFileSize:2
maxFileSize:2
minFileSize:2
lastAccessTime:1490770378864
lastUpdateTime:1490770379748

hive> show table extended like mytable partition (year=2017,month=4,day=1);
FAILED: SemanticException [Error 10006]: Partition not found {year=2017, month=4, day=1}

Answer 2

res=`hive -e "use {db}; show partitions {table} partition(country='india',state='MH')"`

if [ ! -z "$res" ]; then
   do sth if the partition exists
fi

您可以复制其他分区。

Answer 3

hive -e "use <db>; show partitions <table>;" egrep --color '<countryName>|<stateName>'

例如：hive -e "use db; show partitions table;" egrep --color 'India|MH'

这将为您提供所有匹配的分区，其结果与印度或MH或两者都匹配

如何检查HIVE中是否存在任何特定分区

3 个答案:

演示