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15

Query becomes slower on moving from ObjectDB 1.x to ObjectDB 2.x

, still it is taking the same amount of time. 11-Sep 14:55:58 ERROR [JDORepository.retrieve:482] Start Time : class ... .retrieve:484] End Time Time 11-Sep 14:56:34 ERROR [JDORepository.retrieve:482] Start Time : class com.anritsu.eu.rtd.logger.rtdtool.LogEntryAttributeImpl 11-Sep 14:57:09 ERROR [JDORepository.retrieve:484
3

Exception(message, cause)

- the detail message (which is saved for later retrieval by the getMessage() method). cause - the cause (which is saved for later retrieval by the getCause() method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.) Since: Java 1.4
3

setMaxResults(maxResult)

Method javax.persistence.TypedQuery TypedQuery<X> setMaxResults( int maxResult ) Set the maximum number of results to retrieve. Parameters: maxResult - maximum number of results to retrieve Returns: the same query instance Throws: IllegalArgumentException - if the argument is negative Since: JPA 2.0
3

Throwable(message, cause)

- the detail message (which is saved for later retrieval by the getMessage() method). cause - the cause (which is saved for later retrieval by the getCause() method). (A null value is permitted
3

setMaxResults(maxResult)

Method javax.persistence.Query Query setMaxResults( int maxResult ) Set the maximum number of results to retrieve. Parameters: maxResult - maximum number of results to retrieve Returns: the same query instance Throws: IllegalArgumentException - if the argument is negative Since: JPA 1.0
3

combined index not used

). [Step 1c] Retrieve fields in Action (a) instances. [Step 1d] Filter the results of step 1c ... ---------------------------- Retrieve fields in ObjectNode (v$1) instances. Step 4: Process ObjectNode (v$2) instances ... that satisfy: (o.classIdentifier='(OP)'). [Step 1b] Retrieve fields in ObjectNode (o) instances. Step 2
3

Issue with UPPER ?

---------------------------- Retrieve fields in IndividualProfile ($3) instances. Step 4: Process ... .postalAddresses. Step 6: Extract field values ---------------------------- Retrieve fields in IndividualPostalAddress ($5) instances. Step 7: Extract field values ---------------------------- Retrieve
3

Different behavior for two equal queries

$1.organisation. [Step 2b] Retrieve fields in OrganisationContact (v$1) instances. [Step 2c ... (v$2) in $1.communication. Step 4: Extract field values ---------------------------- Retrieve ... (v$4) in $1.postalAddresses. Step 7: Extract field values ---------------------------- Retrieve
2

com.objectdb.o.InternalException: null

.objectdb.o.LDR.E(LDR.java:470) at com.objectdb.jdo.PMImpl.retrieve(PMImpl.java:795) at com.objectdb.jdo.PMImpl.retrieve(PMImpl.java:811) at com.objectdb.o.PEI.getChildCount(PEI.java:110) at com.objectdb ... .E(LDR.java:470) at com.objectdb.jdo.PMImpl.retrieve(PMImpl.java:795) at com.objectdb.jdo.PMImpl
0

javax.jdo.annotations.FetchPlan

-valued fields retrieved by queries. The number of instances of multi-valued fields retrieved by queries

Getting Started

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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