8.3.8 execute(String sql)
- Organization of this subsection
(1) Function
This method executes an SQL statement. You can use the getResultSet and getUpdateCount methods (or the getLargeUpdateCount method) to acquire the ResultSet object and the number of updated rows.
The following table shows the return values of the getResultSet and getUpdateCount methods (or the getLargeUpdateCount method) depending on the type of the SQL statement that was executed.
|
Type of the SQL statement that was executed |
Return value of the getResultSet method |
Return value of the getUpdateCount method or getLargeUpdateCount method |
|---|---|---|
|
Retrieval SQL statement |
ResultSet object obtained as the execution result |
-1 |
|
Non-retrieval SQL statement |
null |
0 or a greater value# |
|
SQL execution resulting in an error |
null |
-1 |
- #
-
If the number of updated rows might exceed Integer.MAX_VALUE, use the getLargeUpdateCount method instead of the getUpdateCount method. If you use the getUpdateCount method, it will return 0 if the number of updated rows exceeds Integer.MAX_VALUE.
- Note
-
A retrieval SQL statement means a SELECT statement. Non-retrieval SQL statements include update SQL statements (such as the UPDATE statement) and definition SQL statements (such as CREATE TABLE).
An update SQL statement means INSERT, UPDATE, DELETE, PURGE CHUNK, and TRUNCATE TABLE statements.
(2) Format
public synchronized boolean execute(String sql) throws SQLException
(3) Arguments
- String sql
-
Specifies the SQL statement that is to be executed.
(4) Return value
If a retrieval SQL statement was executed, this method returns true; if not, the method returns false.
(5) Exceptions
The JDBC driver throws an SQLException in the following cases:
-
The Statement object is closed.
-
The Connection object that created the Statement object is closed.
-
null or a character string with a length of zero was specified in the sql argument.
-
A database access error occurs.
-
The specified SQL statement exceeds 16,000,000 characters.