toolkit.db.queryoptimization
Class QueryInfo

java.lang.Object
  toolkit.db.queryoptimization.QueryInfo

public class QueryInfo
extends java.lang.Object

Class QueryInfo wraps information that a query optimizer needs. Users can retrieve information from it and optimize the query statement.

QueryInfo

public QueryInfo(java.lang.String sQueryString,
                 java.lang.String userName,
                 ConnectionInfo conInfo,
                 java.util.List<ColumnInfo> columnInfos)

Constructs an empty QueryInfo.

getQueryString

public java.lang.String getQueryString()

Gets The query statement to be optimized.

Returns:

the name of this query.

getUserName

public java.lang.String getUserName()

return User ID used when logging onto JReport Server. When viewing the report in JReport Designer, it can return NULL, while when running the report on JReport Server, it will return the name used to log onto the server.

getConnectionInfo

public ConnectionInfo getConnectionInfo()

Gets ConnectionInfo of this query.

Returns:

the ConnectionInfo of this query. #ConnectionInfo

getColumnInfos

public java.util.List<ColumnInfo> getColumnInfos()

Gets the column information. Each column information contains a mapping name and column index of where this column should appear in Select clause of the sql string. 1 means the first one, 2 means the second one, etc. -1 means uncertain and it may be decided by the real resultset meta data. Refer to ColumnInfo.