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17

Queries are slow on a large database

; private Date timeStamp; private String messageName; private String messageDetail ... index on timestamp: <class name="LogVolatileEntityImpl"> <extension vendor-name ... " value="logEntryId"/> <extension vendor-name="objectdb" key="index" value="timestamp
15

Database is locked when in use

not JPA, and can you also please tell if i dont want the timestamp directory to be created ... . How should i get rid of Timestamp directory ? I am going to use the follwoing code     query ... "backup" directory not backup/[timestamp] directory. binitbhaskar Binit Bhaskar There is an undocumented
15

Unexpected COUNT Results

explorer: 1. Using ObjectDB explorer a. SELECT $1.id FROM Pa3DataKey $1 WHERE $1.timestamp <= 187526 ... $1 WHERE $1.timestamp <= 187526 AND ($1.dataItems.get('Sender') != 'PHY' AND $1.dataItems ... Pa3DataKey $1 WHERE $1.timestamp <= 187526 AND ($1.dataItems.get('Receiver') != 'PHY' AND $1
15

java.sql.Time field off by 30 minutes

well. Timestamp works perfectly fine. Ps. dont think its a UTC issue. My system is set at far off UTC+30min ... (System.currentTimeMillis());         java.sql.Timestamp mytimestamp =             new java.sql.Timestamp
15

Query filter comparing Dates

time only (e.g. 23:59:59). java.sql.Timestamp - represents date and time (e.g. 2019-12-31 23:59:59 ... will see the same date and time (converted to local time) when retrieved from the database. Timestamp ... default is considered as a Timestamp. Therefore, the database contains converted elapsed times
15

@Column( name = "columnName") doesn't work

{ @Id @GeneratedValue @Column(name = "KEY_ID") private long id; private Long timestamp ... ; ..... } And expected that after import data to DB, fields must be with following names: KEY_ID, timestamp ... like member defined in class id, timestamp, keyDescriptor, dataItems, codedDataBlock, level
15

objectdb-2.6.9_02 (with "objectdb.temp.no-enhancement-crc-check") vs. generic classes with interfaces: detailed investigation

the decompiled enhanced output for entity classes. - I have also used UNIX file timestamp checking to ensure ... stage (and timestamp checking of enhanced .class files indicates that no "automatic" enhancement ... entity-related operations. I checked the timestamp of the enhanced entity classes, and they are time
15

Error 363 - Failed to read value of inverse relationship

String playerName, password, email; @Temporal(TemporalType.TIMESTAMP) private Date ... ; @Temporal(TemporalType.TIMESTAMP) private Date sendDate = new Date(); private String ... (TemporalType.TIMESTAMP) //    private Date sendDate = new Date(); // //    private String text
12

Order in WHERE Clause affects behaviour on DATE/DATETIME columns

Quick example: public class MyClass { @Column(name = "myText") String myText; @Temporal(TemporalType.TIMESTAMP) @Column(name = "myDate") Date myDate; } Now ... haven't declared the query parameter as TemporalType.TIMESTAMP. But when I write following query
2

Best practice for history tracking

We would like to add to records start and end timestamp fields. When end field is null, it indicates the last version of this item. Few questions: in terms of performance, what would be faster, having a single timestamp and looking for the top1 when ordered by time or the above solution, looking

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ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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