如何检查 HIVE 中是否存在任何特定分区

Question

如何检查 HIVE 中是否存在任何特定分区：

我的配置单元表中有如下分区：

国家=印度/州=MH国家=美国/州=纽约

我想在 HIVE 或使用 shell 脚本中检查 country = "something and state="something" 是否存在。请帮忙

Answer 1

1. desc mytable 分区 (...)
2. 显示像 mytable 分区一样扩展的表 (...)

使用从 shell 执行 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}