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## org.springframework.jdbc.object
Class RdbmsOperation

    java.lang.Object
      org.springframework.jdbc.object.RdbmsOperation

All Implemented Interfaces:
  InitializingBean

Direct Known Subclasses:
  SqlCall, SqlOperation

    public abstract class RdbmsOperation

extends Object
implements InitializingBean

An "RDBMS operation" is a multi-threaded, reusable object representing a query, update, or stored procedure call. An RDBMS operation is not a command, as a command is not reusable. However, execute methods may take commands as arguments. Subclasses should be JavaBeans, allowing easy configuration.

This class and subclasses throw runtime exceptions, defined in the (and as thrown by the `org.springframework.jdbc.core` package, which the classes in this package use under the hood to perform raw JDBC operations).

Subclasses should set SQL and add parameters before invoking the `compile()` method. The order in which parameters are added is significant. The appropriate `execute` or `update` method can then be invoked.

Author:
  Rod Johnson, Juergen Hoeller
See Also:
  `SqlQuery`, `SqlUpdate`, `StoredProcedure`, `JdbcTemplate`

Field Summary
`protected Log` | `logger` Logger available to subclasses

Constructor Summary
`RdbmsOperation()`

Method Summary
`void` | `afterPropertiesSet()` Ensures compilation if used in a bean factory.
`protected boolean` | `allowsUnusedParameters()` Return whether this operation accepts additional parameters that are given but not actually used.
`protected void` | `checkCompiled()` Check whether this operation has been compiled already; lazily compile it if not already compiled.
`void` | `compile()` Compile this query.
`protected abstract void` | `compileInternal()` Subclasses must implement this template method to perform their own compilation.
`void` | `declareParameter(SqlParameter param)` Declare a parameter for this operation.
`protected List<SqlParameter>` | `getDeclaredParameters()` Return a list of the declared `SqlParameter` objects.
`String[]` | `getGeneratedKeysColumnNames()` Return the column names of the auto generated keys.
`JdbcTemplate` | `getJdbcTemplate()` Return the JdbcTemplate object used by this object.
`int` | `getResultSetType()` Return whether statements will return a specific type of ResultSet.
`String` | `getSql()` Subclasses can override this to supply dynamic SQL if they wish, but SQL is normally set by calling the setSql() method or in a subclass constructor.
`boolean` | `isCompiled()` Is this operation "compiled"? Compilation, as in JDO, means that the operation is fully configured, and ready to use.
`boolean` | `isReturnGeneratedKeys()` Return whether statements should be capable of returning auto-generated keys.
`boolean` | `isUpdatableResults()` Return whether statements will return updatable ResultSets.
`void` | `setDataSource(DataSource dataSource)` Set the JDBC DataSource to obtain connections from.
`void` | `setFetchSize(int fetchSize)` Set the fetch size for this RDBMS operation.
`void` | `setGeneratedKeysColumnNames(String[] names)` Set the column names of the auto-generated keys.
`void` | `setJdbcTemplate(JdbcTemplate jdbcTemplate)` An alternative to the more commonly used setDataSource() when you want to use the same JdbcTemplate in multiple RdbmsOperations.
`void` | `setMaxRows(int maxRows)` Set the maximum number of rows for this RDBMS operation.
`void` | `setParameters(SqlParameter[] parameters)` Add one or more declared parameters.
`void` | `setQueryTimeout(int queryTimeout)` Set the query timeout for statements that this RDBMS operation executes.
`void` | `setResultSetType(int resultSetType)` Set whether to use statements that return a specific type of ResultSet.
`void` | `setReturnGeneratedKeys(boolean returnGeneratedKeys)` Set whether prepared statements should be capable of returning auto-generated keys.
`void` | `setSql(String sql)` Set the SQL executed by this operation.
`void` | `setTypes(int[] types)` Add anonymous parameters, specifying only their SQL types as defined in the `java.sql.Types` class.
`void` | `setUpdatableResults(boolean updatableResults)` Set whether to use statements that are capable of returning updatable ResultSets.
`protected boolean` | `supportsLobParameters()` Return whether BLOB/CLOB parameters are supported for this kind of operation.
`protected void` | `validateNamedParameters(Map<String,?> parameters)` Validate the named parameters passed to an execute method based on declared parameters.
`protected void` | `validateParameters(Object[] parameters)` Validate the parameters passed to an execute method based on declared parameters.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### logger

    protected final Log logger

  Logger available to subclasses

Constructor Detail

### RdbmsOperation

    public RdbmsOperation()

Method Detail

### setJdbcTemplate

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate)

  An alternative to the more commonly used setDataSource() when you want to use the same JdbcTemplate in multiple RdbmsOperations. This is appropriate if the JdbcTemplate has special configuration such as a SQLExceptionTranslator that should apply to multiple RdbmsOperation objects.

### getJdbcTemplate

    public JdbcTemplate getJdbcTemplate()

  Return the JdbcTemplate object used by this object.

### setDataSource

    public void setDataSource(DataSource dataSource)

  Set the JDBC DataSource to obtain connections from.

  See Also:
    `JdbcAccessor.setDataSource(javax.sql.DataSource)`

### setFetchSize

    public void setFetchSize(int fetchSize)

  Set the fetch size for this RDBMS operation. This is important for processing large result sets: Setting this higher than the default value will increase processing speed at the cost of memory consumption; setting this lower can avoid transferring row data that will never be read by the application.

  Default is 0, indicating to use the driver's default.

  See Also:
    `JdbcTemplate.setFetchSize(int)`

### setMaxRows

    public void setMaxRows(int maxRows)

  Set the maximum number of rows for this RDBMS operation. This is important for processing subsets of large result sets, avoiding to read and hold the entire result set in the database or in the JDBC driver.

  Default is 0, indicating to use the driver's default.

  See Also:
    `JdbcTemplate.setMaxRows(int)`

### setQueryTimeout

    public void setQueryTimeout(int queryTimeout)

  Set the query timeout for statements that this RDBMS operation executes.

  Default is 0, indicating to use the JDBC driver's default.

  Note: Any timeout specified here will be overridden by the remaining transaction timeout when executing within a transaction that has a timeout specified at the transaction level.

### setResultSetType

    public void setResultSetType(int resultSetType)

  Set whether to use statements that return a specific type of ResultSet.

  Parameters:
    `resultSetType` - the ResultSet type
  See Also:
    `ResultSet.TYPE_FORWARD_ONLY`, `ResultSet.TYPE_SCROLL_INSENSITIVE`, `ResultSet.TYPE_SCROLL_SENSITIVE`, `Connection.prepareStatement(String, int, int)`

### getResultSetType

    public int getResultSetType()

  Return whether statements will return a specific type of ResultSet.

### setUpdatableResults

    public void setUpdatableResults(boolean updatableResults)

  Set whether to use statements that are capable of returning updatable ResultSets.

  See Also:
    `Connection.prepareStatement(String, int, int)`

### isUpdatableResults

    public boolean isUpdatableResults()

  Return whether statements will return updatable ResultSets.

### setReturnGeneratedKeys

    public void setReturnGeneratedKeys(boolean returnGeneratedKeys)

  Set whether prepared statements should be capable of returning auto-generated keys.

  See Also:
    `Connection.prepareStatement(String, int)`

### isReturnGeneratedKeys

    public boolean isReturnGeneratedKeys()

  Return whether statements should be capable of returning auto-generated keys.

### setGeneratedKeysColumnNames

    public void setGeneratedKeysColumnNames(String[] names)

  Set the column names of the auto-generated keys.

  See Also:
    `Connection.prepareStatement(String, String[])`

### getGeneratedKeysColumnNames

    public String[] getGeneratedKeysColumnNames()

  Return the column names of the auto generated keys.

### setSql

    public void setSql(String sql)

  Set the SQL executed by this operation.

### getSql

    public String getSql()

  Subclasses can override this to supply dynamic SQL if they wish, but SQL is normally set by calling the setSql() method or in a subclass constructor.

### setTypes

    public void setTypes(int[] types)
                  throws InvalidDataAccessApiUsageException

  Add anonymous parameters, specifying only their SQL types as defined in the `java.sql.Types` class.

  Parameter ordering is significant. This method is an alternative to the `declareParameter(org.springframework.jdbc.core.SqlParameter)` method, which should normally be preferred.

  Parameters:
    `types` - array of SQL types as defined in the `java.sql.Types` class
  Throws:
    `InvalidDataAccessApiUsageException` - if the operation is already compiled

### declareParameter

    public void declareParameter(SqlParameter param)
                          throws InvalidDataAccessApiUsageException

  Declare a parameter for this operation.

  The order in which this method is called is significant when using positional parameters. It is not significant when using named parameters with named SqlParameter objects here; it remains significant when using named parameters in combination with unnamed SqlParameter objects here.

  Parameters:
    `param` - the SqlParameter to add. This will specify SQL type and (optionally) the parameter's name. Note that you typically use the `SqlParameter` class itself here, not any of its subclasses.
  Throws:
    `InvalidDataAccessApiUsageException` - if the operation is already compiled, and hence cannot be configured further

### setParameters

    public void setParameters(SqlParameter[] parameters)

  Add one or more declared parameters. Used for configuring this operation when used in a bean factory. Each parameter will specify SQL type and (optionally) the parameter's name.

  Parameters:
    `parameters` - Array containing the declared `SqlParameter` objects
  See Also:
    `declaredParameters`

### getDeclaredParameters

    protected List<SqlParameter> getDeclaredParameters()

  Return a list of the declared `SqlParameter` objects.

### afterPropertiesSet

    public void afterPropertiesSet()

  Ensures compilation if used in a bean factory.

  Specified by:
    `afterPropertiesSet` in interface `InitializingBean`

### compile

    public final void compile()
                       throws InvalidDataAccessApiUsageException

  Compile this query. Ignores subsequent attempts to compile.

  Throws:
    `InvalidDataAccessApiUsageException` - if the object hasn't been correctly initialized, for example if no DataSource has been provided

### isCompiled

    public boolean isCompiled()

  Is this operation "compiled"? Compilation, as in JDO, means that the operation is fully configured, and ready to use. The exact meaning of compilation will vary between subclasses.

  Returns:
    whether this operation is compiled, and ready to use.

### checkCompiled

    protected void checkCompiled()

  Check whether this operation has been compiled already; lazily compile it if not already compiled.

  Automatically called by `validateParameters`.

  See Also:
    `validateParameters(java.lang.Object[])`

### validateParameters

    protected void validateParameters(Object[] parameters)
                               throws InvalidDataAccessApiUsageException

  Validate the parameters passed to an execute method based on declared parameters. Subclasses should invoke this method before every `executeQuery()` or `update()` method.

  Parameters:
    `parameters` - parameters supplied (may be `null`)
  Throws:
    `InvalidDataAccessApiUsageException` - if the parameters are invalid

### validateNamedParameters

    protected void validateNamedParameters(Map<String,?> parameters)
                                    throws InvalidDataAccessApiUsageException

  Validate the named parameters passed to an execute method based on declared parameters. Subclasses should invoke this method before every `executeQuery()` or `update()` method.

  Parameters:
    `parameters` - parameter Map supplied. May be `null`.
  Throws:
    `InvalidDataAccessApiUsageException` - if the parameters are invalid

### compileInternal

    protected abstract void compileInternal()
                                     throws InvalidDataAccessApiUsageException

  Subclasses must implement this template method to perform their own compilation. Invoked after this base class's compilation is complete.

  Subclasses can assume that SQL and a DataSource have been supplied.

  Throws:
    `InvalidDataAccessApiUsageException` - if the subclass hasn't been properly configured

### supportsLobParameters

    protected boolean supportsLobParameters()

  Return whether BLOB/CLOB parameters are supported for this kind of operation.

  The default is `true`.

### allowsUnusedParameters

    protected boolean allowsUnusedParameters()

  Return whether this operation accepts additional parameters that are given but not actually used. Applies in particular to parameter Maps.

  The default is `false`.

  See Also:
    `StoredProcedure`

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