Column (Torque Runtime 5.1-SNAPSHOT API)

All Known Subinterfaces:

SQLFunction

All Known Implementing Classes:

AbstractFunction, AggregateFunction, Avg, ColumnImpl, ColumnMap, Count, Max, Min, Sum
```
public interface Column
```
The metadata of a column (or pseudocolumn) in a database.

Version:

$Id: Column.java 1448414 2013-02-20 21:06:35Z tfischer $

Method Summary

Modifier and Type	Method	Description
`String`	`getColumnName()`	Returns the name of the database column (not prefixed by the table name).
`String`	`getFullTableName()`	Returns the table name prefixed with the schema name if it exists.
`String`	`getSchemaName()`	Returns the name of any fixed schema prefix for the column's table (if any).
`String`	`getSqlExpression()`	Returns the SQL expression for the column, qualified by the table name but not by the schema name.
`String`	`getTableName()`	Returns the name of the associated table (not prefixed by the schema name).

- Method Detail
  - getColumnName
```
String getColumnName()
```
    Returns the name of the database column (not prefixed by the table name).
    
    Returns:
    
    the name of the column, may be null. (e.g. for the pseudocoulumn count(*)). Is not blank.
  - getTableName
```
String getTableName()
```
    Returns the name of the associated table (not prefixed by the schema name).
    
    Returns:
    
    the name of the table, may be null but not blank.
  - getSchemaName
```
String getSchemaName()
```
    Returns the name of any fixed schema prefix for the column's table (if any).
    
    Returns:
    
    the schema name, or null if the schema is not known.
  - getFullTableName
```
String getFullTableName()
```
    Returns the table name prefixed with the schema name if it exists. I.e. if a schema name exists, the result will be schemaName.tableName, and otherwise it will just be tableName.
    
    Returns:
    
    the fully qualified table name of the column, may be null but not blank.
  - getSqlExpression
```
String getSqlExpression()
```
    Returns the SQL expression for the column, qualified by the table name but not by the schema name. This can also be a pseudocolumn (e.g. count(*)).
    
    Returns:
    
    the SQL expression for the column, not null.