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  1. ,
    Expert tip

    MySQL doesn't support some types of characters (such as emojis) with the utf8 encoding. You need to be on MySQL 5.5+ and force utf8mb4 (everywhere, client and server). You can do this sending the query "SET NAMES utf8mb4". Check this https://goo.gl/3E2qzg

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    Make sure you are using InnoDB storage engine and READ-COMMITTED transaction isolation level and increase the database server innodb_lock_wait_timeout variable to about 500.

Solutions on the web

via Hibernate JIRA by Pawel Solarski, 1 year ago
org.hibernate.exception.SQLGrammarException: could not execute query
via Stack Overflow by user2037710
, 9 months ago
org.hibernate.exception.DataException: could not extract ResultSet
via Stack Overflow by lijep dam
, 9 months ago
via GitHub by borkurdotnet
, 4 months ago
org.hibernate.exception.GenericJDBCException: could not extract ResultSet
via Hibernate JIRA by Adrian Łukawski, 1 month ago
org.hibernate.exception.SQLGrammarException: could not extract ResultSet
java.sql.SQLException: Column 'ts2_2_0_' not found.	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:896)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:885)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:860)	at com.mysql.jdbc.ResultSetImpl.findColumn(ResultSetImpl.java:1076)	at com.mysql.jdbc.ResultSetImpl.getTimestamp(ResultSetImpl.java:5647)	at org.hibernate.type.descriptor.sql.TimestampTypeDescriptor$2.doExtract(TimestampTypeDescriptor.java:76)	at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:47)	at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:258)	at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:254)	at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:244)	at org.hibernate.type.AbstractStandardBasicType.hydrate(AbstractStandardBasicType.java:327)	at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2775)	at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1735)	at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1661)	at org.hibernate.loader.Loader.getRow(Loader.java:1550)	at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:734)	at org.hibernate.loader.Loader.processResultSet(Loader.java:979)	at org.hibernate.loader.Loader.doQuery(Loader.java:937)	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:343)	at org.hibernate.loader.Loader.doList(Loader.java:2609)	at org.hibernate.loader.Loader.doList(Loader.java:2592)	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2424)	at org.hibernate.loader.Loader.list(Loader.java:2419)	at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:335)	at org.hibernate.internal.SessionImpl.listCustomQuery(SessionImpl.java:2119)	at org.hibernate.internal.AbstractSharedSessionContract.list(AbstractSharedSessionContract.java:952)	at org.hibernate.query.internal.NativeQueryImpl.doList(NativeQueryImpl.java:147)	at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1374)	at org.hibernate.Query.getResultList(Query.java:417)	at org.hibernate.bugs.JPAUnitFieldResultMappingTestCase.shouldMapNativeQueryUsingFieldResultMapping(JPAUnitFieldResultMappingTestCase.java:47)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)