Package mondrian.rolap

Class RolapStar.Column

java.lang.Object
mondrian.rolap.RolapStar.Column
Direct Known Subclasses:
RolapStar.Measure
Enclosing class:
RolapStar
public static class RolapStar.Column extends Object
A column in a star schema.

  • Field Details

  • Constructor Details

    • Column

      protected Column(Dialect.Datatype datatype)
      Fake column.
      Parameters:
      datatype - Datatype

  • Method Details

    • equals

      public boolean equals(Object obj)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • getName

      public String getName()

    • getBitPosition

      public int getBitPosition()

    • getStar

      public RolapStar getStar()

    • getTable

      public RolapStar.Table getTable()

    • getSqlQuery

      public SqlQuery getSqlQuery()

    • getNameColumn

      public RolapStar.Column getNameColumn()

    • getParentColumn

      public RolapStar.Column getParentColumn()

    • getUsagePrefix

      public String getUsagePrefix()

    • isNameColumn

      public boolean isNameColumn()

    • getExpression

      public MondrianDef.Expression getExpression()

    • generateExprString

      public String generateExprString(SqlQuery query)
      Generates a SQL expression, which typically this looks like this: tableName.columnName.

    • getCardinality

      public long getCardinality()
      Get column cardinality from the schema cache if possible; otherwise issue a select count(distinct) query to retrieve the cardinality and stores it in the cache.
      Returns:
      the column cardinality.

    • createInExpr

      public static String createInExpr(String expr, StarColumnPredicate predicate, Dialect.Datatype datatype, SqlQuery sqlQuery)
      Generates a predicate that a column matches one of a list of values.

      Several possible outputs, depending upon whether the there are nulls:

      • One not-null value: foo.bar = 1
      • All values not null: foo.bar in (1, 2, 3)</li
      • Null and not null values: (foo.bar is null or foo.bar in (1, 2))
      • Only null values: foo.bar is null
      • String values: foo.bar in ('a', 'b', 'c')

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • print

      public void print(PrintWriter pw, String prefix)
      Prints this column.
      Parameters:
      pw - Print writer
      prefix - Prefix to print first, such as spaces for indentation

    • getDatatype

      public Dialect.Datatype getDatatype()

    • getDatatypeString

      public String getDatatypeString(Dialect dialect)
      Returns a string representation of the datatype of this column, in the dialect specified. For example, 'DECIMAL(10, 2) NOT NULL'.
      Parameters:
      dialect - Dialect
      Returns:
      String representation of column's datatype

    • getInternalType

      public SqlStatement.Type getInternalType()