Question

我正在尝试在Hbase表上创建Hive表。详情如下：

HBase表的数据如下：

Connected to: Phoenix (version 4.7)
Driver: PhoenixEmbeddedDriver (version 4.7)
Autocommit status: true
Transaction isolation: TRANSACTION_READ_COMMITTED
Building list of tables and columns for tab-completion (set fastconnect to true to skip)...
1341/1341 (100%) Done
Done
sqlline version 1.1.8

0: jdbc:phoenix:maxiqtesting1.lti.com:2181:/h> 
select * from HBASE_TEST_6JULY_1792409;

+---------+---------+---------+

| FIELD0  | FIELD1  | FIELD2  |

+---------+---------+---------+

| 1       | qq      | 23      |

| 2       | ee      | 12      |

| 3       | dd      | 123     |

+---------+---------+---------+


3 rows selected (0.139 seconds)
0: jdbc:phoenix:maxiqtesting1.lti.com:2181:/h>

创建Hive Table命令：

CREATE EXTERNAL TABLE HBASE_TEST_6JULY(FIELD0 int,FIELD1 string, FIELD2 int) 
STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'
WITH SERDEPROPERTIES ("hbase.columns.mapping" = ":key,0:FIELD1,0:FIELD2","hbase.table.default.storage.type" = "binary",  'serialization.format'='1')
TBLPROPERTIES("hbase.table.name" = "HBASE_TEST_6JULY_1792409");

Hive表上的SELECT命令将结果显示为：

hive> select * from HBASE_TEST_6JULY;
OK

-2147483647     qq      -2147483625

-2147483646     ee      -2147483636

-2147483645     dd      -2147483525

Time taken: 0.963 seconds, Fetched: 3 row(s)

整数列值未正确显示。如果我在hive中将所有列都作为String给出，那么我在HBase中为相应的整数列获取null

有人可以通过在HBase上公开Hive表来帮助我并提供读取具有正确值的数字/非字符串列的解决方案吗？

Answer 1

要从hbase读取非字符串列，您应该读取ddl语句

CREATE EXTERNAL TABLE HBASE_TEST_6JULY(
FIELD0 int,
FIELD1 string, 
FIELD2 int
) 
STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'
WITH SERDEPROPERTIES ("hbase.columns.mapping" = ":key#b,0:FIELD1,0:FIELD2#b",  'serialization.format'='1')
TBLPROPERTIES("hbase.table.name" = "HBASE_TEST_6JULY_1792409");

请注意在int列的列映射限定符中使用“#b”。这为我修好了。

See the jira issue thread on this

HBase表上的Hive表显示整数列的NULL

1 个答案: