Examples with Column mondrian.rolap.RolapStar.Column used on opensource projects

Example 11 with Column

use of mondrian.rolap.RolapStar.Column in project mondrian by pentaho.

the class SqlConstraintUtils method getColumnString.

/**
 * Returns the column expression for the level, assuring
 * appropriate tables are added to the from clause of
 * sqlQuery if required.
 * Determines the correct table and field based on the cube
 * and whether an AggStar is present.
 */
private static String getColumnString(SqlQuery sqlQuery, AggStar aggStar, RolapLevel level, RolapCube baseCube) {
    String columnString;
    RolapStar.Column column = null;
    if (level instanceof RolapCubeLevel) {
        // this method can be called within the context of shared members,
        // outside of the normal rolap star, therefore we need to
        // check the level to see if it is a shared or cube level.
        column = ((RolapCubeLevel) level).getBaseStarKeyColumn(baseCube);
    }
    // REVIEW: The following code mostly uses the name column (or name
    // expression) of the level. Shouldn't it use the key column (or key
    // expression)?
    RolapHierarchy hierarchy = level.getHierarchy();
    if (column != null) {
        if (aggStar != null) {
            // this assumes that the name column is identical to the
            // id column
            int bitPos = column.getBitPosition();
            AggStar.Table.Column aggColumn = aggStar.lookupColumn(bitPos);
            AggStar.Table table = aggColumn.getTable();
            table.addToFrom(sqlQuery, false, true);
            columnString = aggColumn.generateExprString(sqlQuery);
        } else {
            RolapStar.Table targetTable = column.getTable();
            hierarchy.addToFrom(sqlQuery, targetTable);
            columnString = column.generateExprString(sqlQuery);
        }
    } else {
        assert (aggStar == null);
        hierarchy.addToFrom(sqlQuery, level.getKeyExp());
        MondrianDef.Expression nameExp = level.getNameExp();
        if (nameExp == null) {
            nameExp = level.getKeyExp();
        }
        columnString = nameExp.getExpression(sqlQuery);
    }
    return columnString;
}