Hadoop 无法使用主键创建配置单元表
我无法使用主键在配置单元中创建外部表。下面是示例代码：Hadoop 无法使用主键创建配置单元表,hadoop,hive,hiveql,Hadoop,Hive,Hiveql,我无法使用主键在配置单元中创建外部表。下面是示例代码： hive> create table exmp((name string),primary key(name)); 这将返回以下错误消息： NoviableException（278@[]）位于 org.apache.hadoop.hive.ql.parse.HiveParser\u IdentifiersParser.identifier（HiveParser\u IdentifiersParser.java:11216）位于 o
hive> create table exmp((name string),primary key(name));
create table exmp(name string,primary key(name));
create table table_name (
row_number() over() as rowId operation
name string,
age Int,
address string) row format delimited fields terminated by ',' stored as textfile;
配置单元中没有任何主键和外键。因此请删除主键并执行
创建表exmp（名称字符串）；很抱歉，如果您有任何其他与配置单元表相关的功能，那么配置单元中没有主键
CREATE DATABASE [IF NOT EXISTS] userdb;
SHOW DATABASES;
DROP DATABASE IF EXISTS userdb;
DROP DATABASE IF EXISTS userdb CASCADE;
CREATE TABLE IF NOT EXISTS employee ( eid int, name String,
salary String, destination String)
COMMENT "Employee details"
ROW FORMAT DELIMITED
FIELDS TERMINATED BY "\t"
LINES TERMINATED BY "\n"
STORED AS TEXTFILE;
LOAD DATA LOCAL INPATH '/home/user/sample.txt'
OVERWRITE INTO TABLE employee;
ALTER TABLE employee RENAME TO emp;
desc tablename;
ALTER TABLE employee CHANGE name ename String;
hive> ALTER TABLE employee CHANGE salary salary Double;
ALTER TABLE employee ADD COLUMNS (
dept STRING COMMENT 'Department name');
ALTER TABLE employee REPLACE COLUMNS (
eid INT empid Int,
ename STRING name String);
DROP TABLE IF EXISTS employee;
SHOW TABLES;
SELECT * FROM employee WHERE Salary>40000 && Dept=TP;
CREATE VIEW emp_30000 AS
SELECT * FROM employee
WHERE salary>30000;
DROP VIEW emp_30000;
首先，hive中的derby没有密钥 第二，某些关键字可能与配置单元中的关键字重复，您必须向它们添加单引号。 对于我的情况，我得到了查询错误
create table NYSE (exchange String,stock_symbol String,stock_date String,stock_price_open double, stock_price_high double, stock_price_low double, stock_price_close double, stock_volume double, stock_price_adj_close double) row format delimited fields terminated by ‘,’;
create table NYSE (`exchange` String,stock_symbol String,stock_date String,stock_price_open double, stock_price_high double, stock_price_low double, stock_price_close double, stock_volume double, stock_price_adj_close double) row format delimited fields terminated by ',';
constraint_specification:
: [, PRIMARY KEY (col_name, ...) DISABLE NOVALIDATE ]
[, CONSTRAINT constraint_name FOREIGN KEY (col_name, ...) REFERENCES
table_name(col_name, ...) DISABLE NOVALIDATE .
创建表pk(
id1整数，
id2整数，
主键（id1、id2）禁用novalidate
);
创建表fk(
id1整数，
id2整数，
约束c1外键（id1，id2）引用pk（id2，id1）禁用novalidate
);
create table exmp(name string,primary key(name));
create table table_name (
row_number() over() as rowId operation
name string,
age Int,
address string) row format delimited fields terminated by ',' stored as textfile;
这里考虑<代码> RoWID为唯一并执行操作。
蜂巢的旧版本不支持主键，但此支持已添加到HIVE 2.1.0版本中。因此，这里是对它的示例查询
创建表\u名称(
id int，
名称字符串，
系弦，
主键（id）禁用novalidate
)；hive——版本
蜂巢1.2.1000.x.x.x.xxxx-x直线
Apache Hive的Beeline版本1.2.1000.x.x.x.xxxx-x主键将导致错误。