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ASF subversion and git services commented on DERBY-3155: -------------------------------------------------------- Commit 1580889 from [~rhillegas] in branch 'code/trunk' [ https://svn.apache.org/r1580889 ] DERBY-3155: Forbid MERGE statements in soft-upgraded databases; commit derby-3155-52-aa-upgrade.diff. > Support for SQL:2003 MERGE statement > ------------------------------------ > > Key: DERBY-3155 > URL: https://issues.apache.org/jira/browse/DERBY-3155 > Project: Derby > Issue Type: Improvement > Components: SQL > Reporter: Trejkaz > Assignee: Rick Hillegas > Labels: derby_triage10_10 > Attachments: MergeStatement.html, MergeStatement.html, > MergeStatement.html, MergeStatement.html, derby-3155-01-ac-grammar.diff, > derby-3155-02-ag-fixParserWarning.diff, > derby-3155-03-ae-backingStoreHashtableWithRowLocation.diff, > derby-3155-03-af-backingStoreHashtableWithRowLocation.diff, > derby-3155-03-ag-backingStoreHashtableWithRowLocation.diff, > derby-3155-03-ah-backingStoreHashtableWithRowLocation.diff, > derby-3155-04-ae-deleteAction.diff, derby-3155-04-af-deleteAction.diff, > derby-3155-05-aa-triggerTransitionTableAsTarget.diff, > derby-3155-06-aa-triggerTransitionTableAsSource.diff, > derby-3155-07-ad-insertAction.diff, derby-3155-08-ah-updateAction.diff, > derby-3155-09-aa-correlationNames.diff, > derby-3155-10-aa-correlationNames.diff, > derby-3155-11-ab-beforeTriggersCantFireMerge.diff, > derby-3155-12-aa-canOmitInsertColumnList.diff, > derby-3155-13-aa-allowSystemAndTempTables.diff, > derby-3155-14-aa-replaceCorrelationNamesOnLeftSideOfSETclauses.diff, > derby-3155-15-aa-replumbMergeResultSetCleanup.diff, > derby-3155-16-aa-treatCurrentRowLocationNodeLikeBaseColumnNode.diff, > derby-3155-17-aa-serializingRowLocations.diff, > derby-3155-18-aa-basicView.diff, > derby-3155-19-aa-forbidSubqueriesInMatchedClauses.diff, > derby-3155-20-aa-reworkColumnMatching.diff, > derby-3155-21-ac-cleanupAndForbidSynonyms.diff, > derby-3155-22-ad-testIdentifiersOnLeftSideOfSetClauses.diff, > derby-3155-23-aa-forbidDerivedColumnLists.diff, > derby-3155-24-aa-supportParameters.diff, > derby-3155-25-aa-parametersAsInsertValues.diff, > derby-3155-26-aa-copyRowLocationForIndexScans.diff, > derby-3155-27-aa-adjustMatchingRefinements.diff, > derby-3155-28-aa-cardinalityViolations.diff, > derby-3155-29-aa-missingSchema.diff, > derby-3155-30-ab-moreCorrelationNames.diff, > derby-3155-31-aa-deletePrivs.diff, derby-3155-32-aa-newTestFunction.diff, > derby-3155-33-ab-insertPrivs.diff, derby-3155-34-aa-updatePrivs.diff, > derby-3155-34-ab-updatePrivs.diff, derby-3155-35-aa-allPrivsTest.diff, > derby-3155-36-aa-lockModeComment.diff, derby-3155-37-aa-printSubNodes.diff, > derby-3155-38-aa-datatypes.diff, derby-3155-39-aa-fixBuild.diff, > derby-3155-40-aa-bigLobs.diff, derby-3155-41-aa-nullGeneratedColumns.diff, > derby-3155-42-aa-triggersAndGeneratedColumns.diff, > derby-3155-43-aa-eliminateDuplicateColumnRefs.diff, > derby-3155-44-aa-lobsInTriggers.diff, derby-3155-45-aa-serialization.diff, > derby-3155-46-aa-deferredDeletes.diff, derby-3155-47-aa-collations.diff, > derby-3155-48-aa-indexScan.diff, derby-3155-49-aa-cleanup1.diff, > derby-3155-50-aa-revampDeleteThenRows.diff, derby-3155-51-aa-cleanup2.diff, > derby-3155-52-aa-upgrade.diff > > > A relatively common piece of logic in a database application is to check for > a row's existence and then either update or insert depending on its existence. > SQL:2003 added a MERGE statement to perform this operation. It looks like > this: > MERGE INTO table_name USING table_name ON (condition) > WHEN MATCHED THEN UPDATE SET column1 = value1 [, column2 = value2 ...] > WHEN NOT MATCHED THEN INSERT column1 [, column2 ...] VALUES (value1 [, > value2 ...]) > At the moment, the only workaround for this would be to write a stored > procedure to do the same operation, or to implement the logic client-side. -- This message was sent by Atlassian JIRA (v6.2#6252)