1. Hive’s official website introduces three graphical interface tools that can connect to HiveServer2 through JDBC in Windows, including: SQuirrel SQL Client, Oracle SQL Developer and DbVisualizer.
Category: Opensource
Open-source software (open-source) is a new term that is defined as software whose source code can be used by the public, and the use, modification, and distribution of this software are not restricted by licenses. Open source software is usually copyrighted, and its license may contain such restrictions: deliberate protection of its open source status, notice of authorship, or development control. “Open source” is being registered as a certification mark by public interest software organizations, which is also a means of creating a formal definition of open source.
Hibernate – JPA @LOB attribute encoding cannot be used with PostgreSQL text
JPA Mapping
I am using JPA and Hibernate. I have an entity with @Lob attributes
@Column(nullable=false)
@Lob
private String text; I am using PostgreSQL 8.4 and entities are correctly ma
Why happened to hadoop spilling?
I am very new to the Hadoop system and the learning phase.
I noticed that Spill occurs as long as the MapOutputBuffer reaches 80% in the Shuffle and Sort phases (I think this can also be conf
Hadoop – excludes partition fields from the selection query in Hive
Suppose I have the following table definition in Hive (the actual table has about 65 columns):
CREATE EXTERNAL TABLE S .TEST (
COL1 STRING,
COL2 STRING
)
PARTITIONED BY (extract_date STRING
Hibernate tools are erroneous in Eclipse STS when connecting to mySQL database
I use Eclipse STS 3.1.0 and Hibernate Tools 3.6.0. I am trying to connect to a MySQL 5.5 database to generate my DAO class. I am using the MySQL driver mysql-connector- java-5.1.21.jar
When s
Hadoop uses Java to set FSPERMISSION to DIR in recursive way
Hi I have a test program, load the file to hdfs user/user1/data/app/type/file.gz on this path now this test program is run multiple times by multiple users . So I want to set the file permissions t
HIVE common statement
1Hive Introduction Hive to me is a data warehouse based on HDFS, which provides a type of SQL language (it is basically the same as the SQL standard but has some special differences) , Allows engi
Add other columns to the audit table using Hibernate Envers
Can I add other columns to the audit table?
For example, I have a table like this
@Entity
@Table(name=”EmpEnverPrac”)
@Audited
public class EmpEnverPractice {
@Id
@Column(name=”ID”)
@Ge
Hadoop – How to make S3DISTCP complies with the wrap
I have millions of small one-line s3 files that I want to merge together. I have s3distcp syntax, but I found that after merging the files, the merged set does not contain newline characters.
Hibernate – GRAILS Domain Relationship
I have a class called School, which has many students, so now when I use School.read to read the school instance, I don’t want all students Have been taken out eagerly, so I changed the laziness of