AW: [dtp-dev] column definitions with suffix

["Goerler, Adrian" <adrian.goerler@xxxxxxx>]

Hi Hemant,

 

thanks for the clarification. In this case we don't have to provide a DDLGenerator for MaxDB but can use the "displayName". I'll file a defect for DB2 UDB.

 

One more question: who, in general, is/feels responsible for the database-definitions. The DTP team? The database vendors? The community?

 

Best regards,

 

Adrian

---

Von: dtp-dev-bounces@xxxxxxxxxxx [mailto:dtp-dev-bounces@xxxxxxxxxxx] Im Auftrag von Hemant S Kolwalkar
Gesendet: Dienstag, 17. Juli 2007 19:22
An: DTP development mailing list
Cc: dtp-dev@xxxxxxxxxxx; dtp-dev-bounces@xxxxxxxxxxx
Betreff: Re: [dtp-dev] column definitions with suffix

Hi Adrian, 

the DDL Generator should be using the following method 
from DatabaseDefinition. For CHAR () FOR 
BIT DATA, the length gets plugged in in this 
method. 

public String 
getPredefinedDataTypeFormattedName(PredefinedDataType 
predefinedDataType); 

and meta-data 
in the DB2 UDB dbdefinition for CHAR () FOR BIT DATA should have the displayName 
entries as below. though i see them missing in the DB2 UDB database definitions 
and that could explain the behavior you are seeing with DB2 UDB. please open a 
defect for this. 

<predefinedDataTypeDefinitions xmi:id="BINARY_1" lengthSupported="true"  defaultLength="1" displayNameSupported="true" displayName="CHAR ({0}) FOR BIT DATA" keyConstraintSupported="true" maximumLength="254" primitiveType="BINARY" jdbcEnumType="-2" javaClassName="byte[]"> 
    <defaultValueTypes>NULL</defaultValueTypes> 
  
  <name>CHAR FOR BIT 
DATA</name> 
  
  <name>CHARACTER FOR 
BIT DATA</name> 
  
  <name>CHAR () FOR BIT 
DATA</name> 
  
  <name>CHARACTER () FOR 
BIT DATA</name> 
  
</predefinedDataTypeDefinitions> 

thanks, 

- Hemant

"Goerler, Adrian" <adrian.goerler@xxxxxxx>
Sent by: dtp-dev-bounces@xxxxxxxxxxx

07/17/2007 02:22 AM

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Subject	[dtp-dev] column definitions with suffix

Hi DTP-team,

we are currently facing the following issue:

Some database, namely "DB2 UDB iSeries",  "DB2 UDB" and  "DB2 UDB zSeries", have database definitions that contain column definitions with a suffix (e.g. CHAR () FOR BIT DATA).

examples:

DB2 UDB:

<predefinedDataTypeDefinitions xmi:id="BINARY_1" lengthSupported="true"  defaultLength="1" displayNameSupported="true" displayName="CHAR ({0}) FOR BIT DATA" keyConstraintSupported="true" maximumLength="254" primitiveType="BINARY" jdbcEnumType="-2" javaClassName="byte[]">

    <defaultValueTypes>NULL</defaultValueTypes>
   <name>CHAR FOR BIT DATA</name>
   <name>CHARACTER FOR BIT DATA</name>
   <name>CHAR () FOR BIT DATA</name>         <-------
   <name>CHARACTER () FOR BIT DATA</name>    <-------
 </predefinedDataTypeDefinitions>
 

DB2 UDB zSeries:

  <predefinedDataTypeDefinitions xmi:id="BINARY_VARYING_1" lengthSupported="true" defaultLength="1" keyConstraintSupported="true" primitiveType="BINARY_VARYING" jdbcEnumType="-3" javaClassName="byte[]">

    <defaultValueTypes>NULL</defaultValueTypes>
   <name>VARCHAR () FOR BIT DATA</name>              <-------
   <name>CHARACTER VARYING () FOR BIT DATA</name>    <-------
   <name>CHAR VARYING () FOR BIT DATA</name>         <-------
 </predefinedDataTypeDefinitions>

These databases don't provide a platform-specific DDL generator. If you trigger DDL generation (on the context menu of the datasource explorer) the GenericDDLGenerator is used. It renders

"VARCHAR () FOR BIT DATA (<length>)" instead of  "VARCHAR (<length>) FOR BIT DATA",

for binary types, which is not understood by the database.

We are currently developing a database definition for (MySQL/SAP) MaxDB. Here we are also having data types that require a postfix (e.g. VARCHAR (<length>) UNICODE). We could fix the issue for MaxDB by providing a MaxDB-specific DDLGenarator, but we think it could be addressed within DTP.

We are now a bit puzzled how to get this right and have the following questions:

- Should this issue be addressed by database-specific DDL generators (to be provided) for the individual databases or could it be addressed in the GenericDDLGenerator?

- What is the meaning of the properties "displayNameSupported" and "displayName"? Should these properties be evaluated by the GenericDDLGenerator to infix the length parameter?

Could anyone help us with a clarification?

Thanks and best regards,

Adrian

Adrian Görler
SAP AG
Dietmar-Hopp-Allee 16
D-69190 Walldorf, Germany
T   +49 6227 747474
http://www.sap.com

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