primary key column change causes exception
------------------------------------------
Key: DDLUTILS-159
URL: https://issues.apache.org/jira/browse/DDLUTILS-159
Project: DdlUtils
Issue Type: Bug
Components: Core (No specific database)
Environment: Windows, SapDB 7.4 and Oracle 8
Reporter: Stefan Huber
Assigned To: Thomas Dudziak
I have the folowing table definition:
<?xml version="1.0"?>
<!DOCTYPE database SYSTEM "http://db.apache.org/torque/dtd/database";>
<database name="rmdb">
<table name="ADDRESS">
<column name="ID" primaryKey="true" required="true" type="INTEGER"/>
<column name="TOWN" primaryKey="false" required="false" type="VARCHAR"
size="40"/>
</table>
</database>
I want to change the name of the primary key column. The new schema definition
is:
<?xml version="1.0"?>
<!DOCTYPE database SYSTEM "http://db.apache.org/torque/dtd/database";>
<database name="rmdb">
<table name="ADDRESS">
<column name="ADDRESSID" primaryKey="true" required="true"
type="INTEGER"/>
<column name="TOWN" primaryKey="false" required="false" type="VARCHAR"
size="40"/>
</table>
</database>
DdlUtils throws the following exception in the alter table process:
Exception in thread "main" java.lang.NullPointerException
at
org.apache.ddlutils.alteration.AddPrimaryKeyChange.apply(AddPrimaryKeyChange.java:69)
at
org.apache.ddlutils.platform.SqlBuilder.processChange(SqlBuilder.java:1160)
at
org.apache.ddlutils.platform.sapdb.SapDbBuilder.processTableStructureChanges(SapDbBuilder.java:180)
at
org.apache.ddlutils.platform.SqlBuilder.processTableStructureChanges(SqlBuilder.java:921)
at
org.apache.ddlutils.platform.SqlBuilder.processTableStructureChanges(SqlBuilder.java:797)
at
org.apache.ddlutils.platform.SqlBuilder.processChanges(SqlBuilder.java:576)
at
org.apache.ddlutils.platform.SqlBuilder.alterDatabase(SqlBuilder.java:469)
at
org.apache.ddlutils.platform.PlatformImplBase.getAlterTablesSql(PlatformImplBase.java:756)
The reason is, that an alteration of the table name is not supported via 'alter
table' so DdlUtils recreates the table. But in
'SapDbBuilder.processTableStructureChanges' the new primary key is created
before the table is recreated in the super-Method. So 'AddPrimaryKeyChange
refers to a column that is not present and throws an exception.
The behaviour is the same with Oracle:
Exception in thread "main" java.lang.NullPointerException
at
org.apache.ddlutils.alteration.AddPrimaryKeyChange.apply(AddPrimaryKeyChange.java:69)
at
org.apache.ddlutils.platform.SqlBuilder.processChange(SqlBuilder.java:1160)
at
org.apache.ddlutils.platform.oracle.Oracle8Builder.processTableStructureChanges(Oracle8Builder.java:488)
at
org.apache.ddlutils.platform.SqlBuilder.processTableStructureChanges(SqlBuilder.java:921)
at
org.apache.ddlutils.platform.SqlBuilder.processTableStructureChanges(SqlBuilder.java:797)
at
org.apache.ddlutils.platform.SqlBuilder.processChanges(SqlBuilder.java:576)
at
org.apache.ddlutils.platform.SqlBuilder.alterDatabase(SqlBuilder.java:469)
at
org.apache.ddlutils.platform.PlatformImplBase.getAlterTablesSql(PlatformImplBase.java:756)
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