Field Detail

• NO_LENGTH

  public static final int NO_LENGTH

  Special value in case no length/size is specified.

  See Also:

  Constant Field Values

• type

  public final DBType.DBDatatype type

  Datatype of a column.

• length

  public final int length

  The length parameter (only few datatypes need this parameter: char, varchar, binary and varbinary).

Constructor Detail

• DBType

  public DBType​(DBType.DBDatatype datatype)

  Build a TAP column type by specifying a datatype.

  Parameters:

  datatype - Column datatype.

• DBType

  public DBType​(DBType.DBDatatype datatype,
                int length)

  Build a TAP column type by specifying a datatype and a length (needed only for datatypes like char, varchar, binary and varbinary).

  Parameters:

  datatype - Column datatype.

  length - Length of the column value (needed only for datatypes like char, varchar, binary and varbinary).

Method Detail

• isNumeric

  public boolean isNumeric()

  Tells whether this type is a numeric.

  Concerned types: SMALLINT, INTEGER, BIGINT, REAL, DOUBLE, BINARY, VARBINARY and BLOB.

  Important note: Since UNKNOWN is an unresolved type, it can potentially be anything. But, in order to avoid incorrect operation while expecting a numeric although the type is unknown and is in fact not really a numeric, this function will return false if the type is UNKNOWN BUT true if UNKNOWN_NUMERIC.

  Returns:

  true if this type is a numeric, false otherwise.

• isBinary

  public boolean isBinary()

  Tells whether this type is a list of bytes.

  Concerned types: BINARY, VARBINARY and BLOB.

  Important note: Since UNKNOWN is an unresolved type, it can potentially be anything. But, in order to avoid incorrect operation while expecting a binary although the type is unknown and is in fact not really a binary, this function will return false if the type is UNKNOWN or UNKNOWN_NUMERIC.

  Returns:

  true if this type is a binary, false otherwise.

• isString

  public boolean isString()

  Tells whether this type is about characters.

  Concerned types: CHAR, VARCHAR, CLOB and TIMESTAMP.

  Important note: Since UNKNOWN is an unresolved type, it can potentially be anything. But, in order to avoid incorrect operation while expecting a string although the type is unknown and is in fact not really a string, this function will return false if the type is UNKNOWN or UNKNOWN_NUMERIC

  Returns:

  true if this type is a string, false otherwise.

• isGeometry

  public boolean isGeometry()

  Tells whether this type is a geometrical region.

  Concerned types: POINT and REGION.

  Important note: Since UNKNOWN is an unresolved type, it can potentially be anything. But, in order to avoid incorrect operation while expecting a geometry although the type is unknown and is in fact not really a geometry, this function will return false if the type is UNKNOWN or UNKNOWN_NUMERIC.

  Returns:

  true if this type is a geometry, false otherwise.

• isUnknown

  public boolean isUnknown()

  Tell whether this type has been resolved or not.

  Concerned types: UNKNOWN and UNKNOWN_NUMERIC.

  Returns:

  true if this type has NOT been resolved, false otherwise.

  Since:

  1.4

• isCompatible

  public boolean isCompatible​(DBType t)

  Tell whether this DBType is compatible with the given one.

  Two DBTypes are said compatible if they are both binary, numeric, geometric or string. If one of the two types is unknown or unknown_numeric, this function will consider them as compatible and will return true.

  Parameters:

  t - The type to compare to.

  Returns:

  true if this type is compatible with the given one, false otherwise.

• toString

  public java.lang.String toString()

  Overrides:

  toString in class java.lang.Object