Top Description Fields Methods
org.hibernate.dialect

public Interface ColumnAliasExtractor

Imports
java.sql.ResultSetMetaData, .SQLException
Strategy for extracting the unique column alias out of a ResultSetMetaData. This is used during the "auto discovery" phase of native SQL queries.

Generally this should be done via ResultSetMetaData#getColumnLabel, but not all drivers do this correctly.

Author
Steve Ebersole

Field Summary

Modifier and TypeField and Description
public static final ColumnAliasExtractor
COLUMN_LABEL_EXTRACTOR

An extractor which uses ResultSetMetaData#getColumnLabel

public static final ColumnAliasExtractor
COLUMN_NAME_EXTRACTOR

An extractor which uses ResultSetMetaData#getColumnName

Method Summary

Modifier and TypeMethod and Description
public String

Returns:

The alias
extractColumnAlias(ResultSetMetaData
The result set metadata
metaData, int
The column position
position)

Extract the unique column alias.

Field Detail

COLUMN_LABEL_EXTRACTORback to summary
public static final ColumnAliasExtractor COLUMN_LABEL_EXTRACTOR

An extractor which uses ResultSetMetaData#getColumnLabel

COLUMN_NAME_EXTRACTORback to summary
public static final ColumnAliasExtractor COLUMN_NAME_EXTRACTOR

An extractor which uses ResultSetMetaData#getColumnName

Method Detail

extractColumnAliasback to summary
public String extractColumnAlias(ResultSetMetaData metaData, int position) throws SQLException

Extract the unique column alias.

Parameters
metaData:ResultSetMetaData

The result set metadata

position:int

The column position

Returns:String

The alias