PostgreSQL Adapter Project - Extending SQLSchemaManager

PostgreSQL Adapter for NexJ - Extending SQL Schema Manager

• SQLSchemaManager is used in maintaining database schemas (DDL)

Task Summary

Task	Status	Test Status
Extend SQLSchemaManager to support PostgreSQL	DONE	DONE
Research and add Maximum column Precision
Figure out Data Type Mapping
Implement appendColumnType() method
Implement appendConcatenate() method	DONE
Implement appendPrint() method
Implement appendUpgradeStepEnd() method
Implement appendUpgradeStepStart() method
Implement appendTSExtract() method
Implement appendTSIncrement() method
Implement getCreateEtcScriptName() method
Implement getDefaultIndexspace() method
Implement getDefaultLongspace() method
Implement getDefaultTablespace() method
Implement getDropEtcScriptName() method
Implement getDynamicSQLAppender() method
Implement getGUIDExpr() method
Implement getNowExpr() method
Implement getSeparator() method	DONE
Implement getSetupEtcScriptName() method
Override renameTable[1]
Override renameColumn[2]
Override renameIndex[3]

Task Details

Extend SQLSchemaManager to support PostgreSQL

Create a new class PostgreSQLSchemaManager by extending SQLSchemaManager and implementing all necessary abstract classes

Research and add Maximum column Precision

Following are the Maximum column precisions we might need to establish:
(All constants are defined in PostgreSQLAdapter class)

• DEFAULT_FETCH_SIZE
• MAX_CHAR_PRECISION
• MAX_VARCHAR_PRECISION
• MAX_BINARY_PRECISION
• MAX_VARBINARY_PRECISION
• MAX_REAL_PRECISION
• TIMESTAMP_FORMAT_SQL
• TIMESTAMP_FORMAT

Figure out Data Type Mapping

http://www.postgresql.org/docs/current/static/datatype.html

• Go over all data types offered in PostgreSQL
• Map types defined in Primitive class

Implement appendColumnType() method

This method appends a table column type declaration to a string buffer.

• use logic and mapping to append required column data types to incoming string.
• Test it

References

SQL Commands supported by PostgreSQL