Package org.apache.empire.db.expr.column

This package contains SQL-generator classes for column expressions.

See:
          Description

Class Summary
DBAbstractFuncExpr This implements some basic functionality for SQL functions based on a column expression
DBAliasExpr This class allows column renaming in SQL.
DBCalcExpr This class is used for performing calculations in SQL
It handles the mathematical operations ("+", "-", "*", "/") for the current column.
DBCaseExpr This class is used to add the "case when ?=A then X else Y end" statement to the SQL-Command.
DBConcatExpr This class is used for performing string concatenation in SQL
DBConvertExpr This class is used to convert a value to a different data type.
DBCountExpr This class is used to add the "count" statement to the SQL-Command.
DBDecodeExpr This class is used to decode a set of keys to the corresponding target values.
DBFuncExpr This class is used for performing various SQL functions on a column or column expression.
DBValueExpr This class is used for declaring constant values in SQL.
 

Package org.apache.empire.db.expr.column Description

This package contains SQL-generator classes for column expressions. There is no need to use these classes directly. They are internally created through functions on the DBColumnExpr object.



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