h2

H2 - CREATE TABLE creates wrong data type

由 落花浮王杯 提交于 2019-12-02 06:17:55
问题 Testing my DAL with H2 in-memory database currently doesn't work because the data tye BINARY gets converted to VARBINARY: CREATE TABLE test ( pk_user_id INT AUTO_INCREMENT(1, 1) PRIMARY KEY, uuid BINARY(16) UNIQUE NOT NULL ); which results in a wrong data type if I check if the columns with the expected data types exists: 2017-03-20 16:24:48 persistence.database.Table check Unexpected column (UUID) or type (-3, VARBINARY) 回答1: tl;dr which results in a wrong data type No, not the wrong type,

How to check h2 database health and corruption

由 倖福魔咒の 提交于 2019-12-02 06:12:46
问题 I'm using h2 database in embedded mode with JavaFX 8 desktop application and I have developed an option for the user to backup and restore the database file. In the older version of the program I have used SQLite database and checking the database file was quite simple using this command pragma integrity_check. Using that command with the h2 database always throws an exception. What is the alternative for that in the h2 database? And is there an explicit or more proper way to check the h2

Why are added tables from Java not visible when I open the H2 console?

由 北慕城南 提交于 2019-12-02 05:57:21
问题 I use an H2 embedded database in Java, and after creating the database and adding some tables and data, it gets saved as a file in a directorey of my computer. But whenever I open this file with the H2 Console, it shows no tables at all? Why are the tables not there? I am using this URL in my java code: jdbc:h2:file://C:/Temp/H2/ourDB And I log into the console with the following information: After logging in, I can't see the tables that were created in Java? 回答1: You have used a different

Issue with Hash Map Space and Performance

由 不羁岁月 提交于 2019-12-02 03:30:31
问题 I have to store more than 100 millions of key-values in my HashMultiMap (key can have multiple values). Can anybody help me which one is faster for both storing and searching: 1) Berkeley DB 2) Tokyo Cabinet 3) H2 4) EhCache 5) Or anyothers Another point, is performance of those approximately identical to in-memory hash map ? A little bit guidance will be more helpful. Thanks. NB: information about any one of these is also helpful. 回答1: I'd recommend Redis. It's more of a data structure store

H2, HSQLDB or any other embedded database using an InputStream

由 社会主义新天地 提交于 2019-12-02 02:59:59
问题 Can I use H2, HSQLDB, or any other embedded database, with a database from an InputStream instead of a file? I'm planning to use AssetManager.open() on Android, which can return an InputStream in random access mode. 回答1: H2 supports a pluggable file system that allows you to access read-only databases in a zip or jar files. However, there is currently no file system implementation for the AssetManager . It should be relatively easy to implement it. The best starting point is probably

How to check h2 database health and corruption

由 南笙酒味 提交于 2019-12-02 02:31:06
I'm using h2 database in embedded mode with JavaFX 8 desktop application and I have developed an option for the user to backup and restore the database file. In the older version of the program I have used SQLite database and checking the database file was quite simple using this command pragma integrity_check. Using that command with the h2 database always throws an exception. What is the alternative for that in the h2 database? And is there an explicit or more proper way to check the h2 database file before using it? Any help or code sample is appreciated,thanks. What you could do is execute

H2, HSQLDB or any other embedded database using an InputStream

由 假如想象 提交于 2019-12-02 02:20:35
Can I use H2, HSQLDB, or any other embedded database, with a database from an InputStream instead of a file? I'm planning to use AssetManager.open() on Android, which can return an InputStream in random access mode. H2 supports a pluggable file system that allows you to access read-only databases in a zip or jar files . However, there is currently no file system implementation for the AssetManager . It should be relatively easy to implement it. The best starting point is probably FileSystemZip and FileObjectZip . Most databases need random access to underlying files so an InputStream will not

tcp server ip address

由 让人想犯罪 __ 提交于 2019-12-02 01:11:39
问题 When starting H2 tcp server and the host pc has multiple IP address's how can I define the IP that the server is going to bind to listen for connections ? We can define the tcp port but there does not seems to be a way to define the ip address. Thank you, Oscar 回答1: http://www.h2database.com/html/advanced.html#server_bind_address Usually server sockets accept connections on any/all local addresses. This may be a problem on multi-homed hosts. To bind only to one address, use the system

H2 - CREATE TABLE creates wrong data type

由 一笑奈何 提交于 2019-12-02 00:54:37
Testing my DAL with H2 in-memory database currently doesn't work because the data tye BINARY gets converted to VARBINARY: CREATE TABLE test ( pk_user_id INT AUTO_INCREMENT(1, 1) PRIMARY KEY, uuid BINARY(16) UNIQUE NOT NULL ); which results in a wrong data type if I check if the columns with the expected data types exists: 2017-03-20 16:24:48 persistence.database.Table check Unexpected column (UUID) or type (-3, VARBINARY) tl;dr which results in a wrong data type No, not the wrong type, just another label for the same type. The binary type has five synonyms: { BINARY | VARBINARY | LONGVARBINARY

How to work with alias in JPQL

由 [亡魂溺海] 提交于 2019-12-02 00:39:11
问题 I'm trying to get some values from a H2 db table. The query which does what I need is this: SELECT cast(creationDate as date) as DATE, SUM(paymentValue) as TOTAL,fxRate FROM payment group by DATE where "creationDate", "paymentValue", "fxRate" are columns of the table "payment". CreationDate is a timestamp so I have to get only the date from it. When I try to write it in Java @Query("SELECT cast(creationDate as date) as daydate , SUM(paymentValue) as value1, fxRate as value2 FROM payment " +
订阅 h2