[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-4732) Update Teradata Dialect for Teradata 13.0

[Strong Liu (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-4732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=39001#action_39001 ] 

Strong Liu commented on HHH-4732:
---------------------------------

1) those are some of teradata limitation, maybe David can explain more.
2) the thing is that we can't get the real table name that to be dropped without perform a query ("sel IndexId, ChildTable, IndexName from dbc.RI_Distinct_ChildrenV where IndexName = '" + constraintName + "'";), see above David's comment, and I don't think it is a good idea that we get the db connection in the Configuration
3) yes, it is a teradata specific problem, and i haven't see other db has this requirement yet. but dont' think we have other choice to support this teradata's odd behavior :D

> Update Teradata Dialect for Teradata 13.0
> -----------------------------------------
>
>                 Key: HHH-4732
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4732
>             Project: Hibernate Core
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 3.3.2
>         Environment: Hibernate 3.3.2/ Teradata JDBC Driver 13.0, Teradata Database 13.0
>            Reporter: David Repshas
>            Assignee: Strong Liu
>         Attachments: teradata.zip, teradataDiff.zip, testsuiteMods.zip
>
>
> Would like to update Teradata Dialect to work with Teradata Database 13.0.
> I've include the following files with changes as noted:
> org.hibernate.dialect.dialect.java
> - added include of java.sql.statement
> - added code to support the removal of temporary
>   files created when using referential integrity
>   The three new methods are:
> 	public boolean supportsDropPreProcess() 
>         public String performDropPreProcess(Statement stmt, String dropSql) throws SQLException
>         public void performDropPostProcess(Statement stmt, String dropSql) throws SQLException 
> ==================================
> org.hibernate.dialect.TeradataDialect.java
> - added new include files
> - modified registerFunction calls for "current_time" and "current_date"
> - put registerKeyword list in alphabetical order and added keywords:
>     column,map,password,summary, type, value and year
> - changed "getAddColumnString()" to return "Add"
> - added new methods:
>    public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter()
>    public String extractConstraintName(SQLException sqlex) 
>    public boolean supportsNotNullUnique()
>    public boolean supportsExpectedLobUsagePattern()
>    public boolean supportsUnboundedLobLocatorMaterialization() 
>    public boolean supportsDropPreProcess() 
>    public String performDropPreProcess(Statement stmt, String dropSql) throws SQLException
>    public void performDropPostProcess(Statement stmt, String dropSql) throws SQLException 
>    
> ==================================
> org.hibernate.tool.hbm2ddl.SchemaExport
> - added hooks for new methods:
> 	supportsDropPreProcess,performDropPreProcess and performDropPostProcess 
> ==================================
> Also made some changes to some of the files in testsuite:
> =============================================
> test/hql/astParserLoadingTest.java
>    - Add instance check of TeradataDialect to get correct behavior
> =============================================
> test/legacy/foobartest.java
>  - Add instance check of TeradataDialect to get correct behavior
>  - modified SQL: Teradata requires "<>" rather than "!="
>   
> =============================================
> test/typeParameters\typeparametertest.java
>  -needed to disable these tests as Teradata locking was causing 
> a deadlock situation when they run
> =============================================

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