23 * questions.
24 */
25
26 package java.sql;
27
28 /**
29 * An object that can be used to get information about the types
30 * and properties of the columns in a <code>ResultSet</code> object.
31 * The following code fragment creates the <code>ResultSet</code> object rs,
32 * creates the <code>ResultSetMetaData</code> object rsmd, and uses rsmd
33 * to find out how many columns rs has and whether the first column in rs
34 * can be used in a <code>WHERE</code> clause.
35 * <PRE>
36 *
37 * ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM TABLE2");
38 * ResultSetMetaData rsmd = rs.getMetaData();
39 * int numberOfColumns = rsmd.getColumnCount();
40 * boolean b = rsmd.isSearchable(1);
41 *
42 * </PRE>
43 */
44
45 public interface ResultSetMetaData extends Wrapper {
46
47 /**
48 * Returns the number of columns in this <code>ResultSet</code> object.
49 *
50 * @return the number of columns
51 * @exception SQLException if a database access error occurs
52 */
53 int getColumnCount() throws SQLException;
54
55 /**
56 * Indicates whether the designated column is automatically numbered.
57 *
58 * @param column the first column is 1, the second is 2, ...
59 * @return <code>true</code> if so; <code>false</code> otherwise
60 * @exception SQLException if a database access error occurs
61 */
62 boolean isAutoIncrement(int column) throws SQLException;
|
23 * questions.
24 */
25
26 package java.sql;
27
28 /**
29 * An object that can be used to get information about the types
30 * and properties of the columns in a <code>ResultSet</code> object.
31 * The following code fragment creates the <code>ResultSet</code> object rs,
32 * creates the <code>ResultSetMetaData</code> object rsmd, and uses rsmd
33 * to find out how many columns rs has and whether the first column in rs
34 * can be used in a <code>WHERE</code> clause.
35 * <PRE>
36 *
37 * ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM TABLE2");
38 * ResultSetMetaData rsmd = rs.getMetaData();
39 * int numberOfColumns = rsmd.getColumnCount();
40 * boolean b = rsmd.isSearchable(1);
41 *
42 * </PRE>
43 *
44 * @since 1.1
45 */
46
47 public interface ResultSetMetaData extends Wrapper {
48
49 /**
50 * Returns the number of columns in this <code>ResultSet</code> object.
51 *
52 * @return the number of columns
53 * @exception SQLException if a database access error occurs
54 */
55 int getColumnCount() throws SQLException;
56
57 /**
58 * Indicates whether the designated column is automatically numbered.
59 *
60 * @param column the first column is 1, the second is 2, ...
61 * @return <code>true</code> if so; <code>false</code> otherwise
62 * @exception SQLException if a database access error occurs
63 */
64 boolean isAutoIncrement(int column) throws SQLException;
|