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| author | Aaron M. Renn <arenn@urbanophile.com> | 1999-01-19 02:17:26 +0000 |
|---|---|---|
| committer | Aaron M. Renn <arenn@urbanophile.com> | 1999-01-19 02:17:26 +0000 |
| commit | 03c85396b198e22f18cd1881f5d86b7d7b5fa14f (patch) | |
| tree | cb04dc3b04c311b24fdbc4a2ba2417f402f84ac0 /java/sql/Statement.java | |
| parent | ea6916243746fc632554f29840d55538f1171153 (diff) | |
| download | classpath-03c85396b198e22f18cd1881f5d86b7d7b5fa14f.tar.gz | |
Initial Checkin
Diffstat (limited to 'java/sql/Statement.java')
| -rw-r--r-- | java/sql/Statement.java | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/java/sql/Statement.java b/java/sql/Statement.java new file mode 100644 index 000000000..f30b52fdf --- /dev/null +++ b/java/sql/Statement.java @@ -0,0 +1,407 @@ +/************************************************************************* +/* Statement.java -- Interface for executing SQL statements. +/* +/* Copyright (c) 1999 Free Software Foundation, Inc. +/* Written by Aaron M. Renn (arenn@urbanophile.com) +/* +/* This library is free software; you can redistribute it and/or modify +/* it under the terms of the GNU Library General Public License as published +/* by the Free Software Foundation, either version 2 of the License, or +/* (at your option) any later verion. +/* +/* This library is distributed in the hope that it will be useful, but +/* WITHOUT ANY WARRANTY; without even the implied warranty of +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +/* GNU Library General Public License for more details. +/* +/* You should have received a copy of the GNU Library General Public License +/* along with this library; if not, write to the Free Software Foundation +/* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA +/*************************************************************************/ + +package java.sql; + +/** + * This interface provides a mechanism for executing SQL statements. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public abstract interface Statement +{ + +/** + * This method executes the specified SQL SELECT statement and returns a + * (possibly empty) <code>ResultSet</code> with the results of the query. + * + * @param sql The SQL statement to execute. + * + * @return The result set of the SQL statement. + * + * @exception SQLException If an error occurs. + */ +public abstract ResultSet +executeQuery(String sql) throws SQLException; + +/*************************************************************************/ + +/** + * This method executes the specified SQL INSERT, UPDATE, or DELETE statement + * and returns the number of rows affected, which may be 0. + * + * @param sql The SQL statement to execute. + * + * @return The number of rows affected by the SQL statement. + * + * @exception SQLException If an error occurs. + */ +public abstract int +executeUpdate(String sql) throws SQLException; + +/*************************************************************************/ + +/** + * This method closes the statement and frees any associated resources. + * + * @exception SQLException If an error occurs. + */ +public abstract void +close() throws SQLException; + +/*************************************************************************/ + +/** + * This method returns the maximum length of any column value in bytes. + * + * @return The maximum length of any column value in bytes. + * + * @exception SQLException If an error occurs. + */ +public abstract int +getMaxFieldSize() throws SQLException; + +/*************************************************************************/ + +/** + * This method sets the limit for the maximum length of any column in bytes. + * + * @param maxsize The new maximum length of any column in bytes. + * + * @exception SQLException If an error occurs. + */ +public abstract void +setMaxFieldSize(int maxsize) throws SQLException; + +/*************************************************************************/ + +/** + * This method returns the maximum possible number of rows in a result set. + * + * @return The maximum possible number of rows in a result set. + * + * @exception SQLException If an error occurs. + */ +public abstract int +getMaxRows() throws SQLException; + +/*************************************************************************/ + +/** + * This method sets the maximum number of rows that can be present in a + * result set. + * + * @param maxrows The maximum possible number of rows in a result set. + * + * @exception SQLException If an error occurs. + */ +public abstract void +setMaxRows(int maxrows) throws SQLException; + +/*************************************************************************/ + +/** + * This method sets the local escape processing mode on or off. The + * default value is on. + * + * @param escape <code>true</code> to enable local escape processing, + * <code>false</code> to disable it. + * + * @exception SQLException If an error occurs. + */ +public abstract void +setEscapeProcessing(boolean esacpe) throws SQLException; + +/*************************************************************************/ + +/** + * The method returns the number of seconds a statement may be in process + * before timing out. A value of 0 means there is no timeout. + * + * @return The SQL statement timeout in seconds. + * + * @exception SQLException If an error occurs. + */ +public abstract int +getQueryTimeout() throws SQLException; + +/*************************************************************************/ + +/** + * This method sets the number of seconds a statement may be in process + * before timing out. A value of 0 means there is no timeout. + * + * @param timeout The new SQL statement timeout value. + * + * @exception SQLException If an error occurs. + */ +public abstract void +setQueryTimeout(int timeout) throws SQLException; + +/*************************************************************************/ + +/** + * This method cancels an outstanding statement, if the database supports + * that operation. + * + * @exception SQLException If an error occurs. + */ +public abstract void +cancel() throws SQLException; + +/*************************************************************************/ + +/** + * This method returns the first SQL warning attached to this statement. + * Subsequent warnings will be chained to this one. + * + * @return The first SQL warning for this statement. + * + * @exception SQLException If an error occurs. + */ +public abstract SQLWarning +getWarnings() throws SQLException; + +/*************************************************************************/ + +/** + * This method clears any SQL warnings that have been attached to this + * statement. + * + * @exception SQLException If an error occurs. + */ +public abstract void +clearWarnings() throws SQLException; + +/*************************************************************************/ + +/** + * This method sets the cursor name that will be used by the result set. + * + * @param name The cursor name to use for this statement. + * + * @exception SQLException If an error occurs. + */ +public abstract void +setCursorName(String name) throws SQLException; + +/*************************************************************************/ + +/** + * This method executes an arbitrary SQL statement of any time. The + * methods <code>getResultSet</code>, <code>getMoreResults</code> and + * <code>getUpdateCount</code> retrieve the results. + * + * @return <code>true</code> if a result set was returned, <code>false</code> + * if an update count was returned. + * + * @exception SQLException If an error occurs. + */ +public abstract boolean +execute(String sql) throws SQLException; + +/*************************************************************************/ + +/** + * This method returns the result set of the SQL statement that was + * executed. This should be called only once per result set returned. + * + * @return The result set of the query, or <code>null</code> if there was + * no result set (for example, if the statement was an UPDATE). + * + * @exception SQLException If an error occurs. + * + * @see execute + */ +public abstract ResultSet +getResultSet() throws SQLException; + +/*************************************************************************/ + +/** + * This method returns the update count of the SQL statement that was + * executed. This should be called only once per executed SQL statement. + * + * @return The update count of the query, or -1 if there was no update + * count (for example, if the statement was a SELECT). + * + * @exception SQLException If an error occurs. + * + * @see execute + */ +public abstract int +getUpdateCount() throws SQLException; + +/*************************************************************************/ + +/** + * This method advances the result set pointer to the next result set, + * which can then be retrieved using <code>getResultSet</code> + * + * @return <code>true</code> if there is another result set, + * <code>false</code> otherwise (for example, the next result is an + * update count). + * + * @exception SQLException If an error occurs. + * + * @see execute + */ +public abstract boolean +getMoreResults() throws SQLException; + +/*************************************************************************/ + +/** + * This method returns the current direction that the driver thinks the + * result set will be accessed int. + * + * @return The direction the result set will be accessed in (????) + * + * @exception SQLException If an error occurs. + */ +public abstract int +getFetchDirection() throws SQLException; + +/*************************************************************************/ + +/** + * This method informs the driver which direction the result set will + * be accessed in. + * + * @param direction The direction the result set will be accessed in (?????) + * + * @exception SQLException If an error occurs. + */ +public abstract void +setFetchDirection(int direction) throws SQLException; + +/*************************************************************************/ + +/** + * This method returns the number of rows the driver believes should be + * fetched from the database at a time. + * + * @return The number of rows that will be fetched from the database at a time. + * + * @exception SQLException If an error occurs. + */ +public abstract int +getFetchSize() throws SQLException; + +/*************************************************************************/ + +/** + * This method informs the driver how many rows it should fetch from the + * database at a time. + * + * @param numrows The number of rows the driver should fetch at a time + * to populate the result set. + * + * @exception SQLException If an error occurs. + */ +public abstract void +setFetchSize(int numrows) throws SQLException; + +/*************************************************************************/ + +/** + * This method returns the concurrency type of the result set for this + * statement. This will be one of the concurrency types defined in + * <code>ResultSet</code>. + * + * @return The concurrency type of the result set for this statement. + * + * @exception SQLException If an error occurs. + * + * @see ResultSet + */ +public abstract int +getResultSetConcurrency() throws SQLException; + +/*************************************************************************/ + +/** + * This method returns the result set type for this statement. This will + * be one of the result set types defined in <code>ResultSet</code>. + * + * @return The result set type for this statement. + * + * @exception SQLException If an error occurs. + * + * @see ResultSet + */ +public abstract int +getResultSetType() throws SQLException; + +/*************************************************************************/ + +/** + * This method adds a SQL statement to a SQL batch. A driver is not + * required to implement this method. + * + * @param sql The sql statement to add to the batch. + * + * @exception SQLException If an error occurs. + */ +public abstract void +addBatch(String sql) throws SQLException; + +/*************************************************************************/ + +/** + * This method clears out any SQL statements that have been populated in + * the current batch. A driver is not required to implement this method. + * + * @exception SQLException If an error occurs. + */ +public abstract void +clearBatch() throws SQLException; + +/*************************************************************************/ + +/** + * This method executes the SQL batch and returns an array of update + * counts - one for each SQL statement in the batch - ordered in the same + * order the statements were added to the batch. A driver is not required + * to implement this method. + * + * @return An array of update counts for this batch. + * + * @exception SQLException If an error occurs. + */ +public abstract int[] +executeBatch() throws SQLException; + +/*************************************************************************/ + +/** + * This method returns the <code>Connection</code> instance that was + * used to create this object. + * + * @return The connection used to create this object. + * + * @exception SQLException If an error occurs. + */ +public abstract Connection +getConnection() throws SQLException; + +} // interface Statement + |
