CommandContainer

java.lang.Object
- org.h2.command.Command
- - org.h2.command.CommandContainer

All Implemented Interfaces:

java.lang.AutoCloseable, CommandInterface
```
public class CommandContainer
extends Command
```
Represents a single SQL statements. It wraps a prepared statement.

Field Summary
- Fields inherited from class org.h2.command.Command
  session, startTimeNanos
- Fields inherited from interface org.h2.command.CommandInterface
  ALTER_INDEX_RENAME, ALTER_SCHEMA_RENAME, ALTER_SEQUENCE, ALTER_TABLE_ADD_COLUMN, ALTER_TABLE_ADD_CONSTRAINT_CHECK, ALTER_TABLE_ADD_CONSTRAINT_PRIMARY_KEY, ALTER_TABLE_ADD_CONSTRAINT_REFERENTIAL, ALTER_TABLE_ADD_CONSTRAINT_UNIQUE, ALTER_TABLE_ALTER_COLUMN_CHANGE_TYPE, ALTER_TABLE_ALTER_COLUMN_DEFAULT, ALTER_TABLE_ALTER_COLUMN_DROP_NOT_NULL, ALTER_TABLE_ALTER_COLUMN_NOT_NULL, ALTER_TABLE_ALTER_COLUMN_ON_UPDATE, ALTER_TABLE_ALTER_COLUMN_RENAME, ALTER_TABLE_ALTER_COLUMN_SELECTIVITY, ALTER_TABLE_ALTER_COLUMN_VISIBILITY, ALTER_TABLE_DROP_COLUMN, ALTER_TABLE_DROP_CONSTRAINT, ALTER_TABLE_RENAME, ALTER_TABLE_RENAME_CONSTRAINT, ALTER_TABLE_SET_REFERENTIAL_INTEGRITY, ALTER_USER_ADMIN, ALTER_USER_RENAME, ALTER_USER_SET_PASSWORD, ALTER_VIEW, ANALYZE, BACKUP, BEGIN, CALL, CHECKPOINT, CHECKPOINT_SYNC, COMMENT, COMMIT, COMMIT_TRANSACTION, CREATE_AGGREGATE, CREATE_ALIAS, CREATE_CONSTANT, CREATE_DOMAIN, CREATE_INDEX, CREATE_LINKED_TABLE, CREATE_ROLE, CREATE_SCHEMA, CREATE_SEQUENCE, CREATE_SYNONYM, CREATE_TABLE, CREATE_TRIGGER, CREATE_USER, CREATE_VIEW, DEALLOCATE, DELETE, DROP_AGGREGATE, DROP_ALIAS, DROP_ALL_OBJECTS, DROP_CONSTANT, DROP_DOMAIN, DROP_INDEX, DROP_ROLE, DROP_SCHEMA, DROP_SEQUENCE, DROP_SYNONYM, DROP_TABLE, DROP_TRIGGER, DROP_USER, DROP_VIEW, EXECUTE, EXECUTE_IMMEDIATELY, EXPLAIN, EXPLAIN_ANALYZE, GRANT, INSERT, MERGE, NO_OPERATION, PREPARE, PREPARE_COMMIT, REPLACE, REVOKE, ROLLBACK, ROLLBACK_TO_SAVEPOINT, ROLLBACK_TRANSACTION, RUNSCRIPT, SAVEPOINT, SCRIPT, SELECT, SET, SET_AUTOCOMMIT_FALSE, SET_AUTOCOMMIT_TRUE, SHUTDOWN, SHUTDOWN_COMPACT, SHUTDOWN_DEFRAG, SHUTDOWN_IMMEDIATELY, TRUNCATE_TABLE, UNKNOWN, UPDATE

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`canReuse()` Whether the command is already closed (in which case it can be re-used).
`int`	`getCommandType()` Get command type.
`java.util.Set<DbObject>`	`getDependencies()`
`java.util.ArrayList<? extends ParameterInterface>`	`getParameters()` Get the list of parameters.
`boolean`	`isCacheable()`
`boolean`	`isQuery()` Check if this command is a query.
`boolean`	`isReadOnly()` Check if this command is read only.
`boolean`	`isTransactional()` Check if this command is transactional.
`void`	`prepareJoinBatch()` Prepare join batching.
`ResultInterface`	`query(int maxrows)` Execute a query statement, if this is possible.
`ResultInterface`	`queryMeta()` Get an empty result set containing the meta data.
`void`	`stop()` Stop the command execution, release all locks and resources
`ResultWithGeneratedKeys`	`update(java.lang.Object generatedKeysRequest)` Execute an updating statement (for example insert, delete, or update), if this is possible.

Methods inherited from class org.h2.command.Command
cancel, checkCanceled, close, executeQuery, executeUpdate, getMetaData, reuse, setCanReuse, toString

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

- Method Detail
  - getParameters
```
public java.util.ArrayList<? extends ParameterInterface> getParameters()
```
    Description copied from class: Command
    
    Get the list of parameters.
    
    Specified by:
    
    getParameters in interface CommandInterface
    
    Specified by:
    
    getParameters in class Command
    
    Returns:
    the list of parameters
  - isTransactional
```
public boolean isTransactional()
```
    Description copied from class: Command
    
    Check if this command is transactional. If it is not, then it forces the current transaction to commit.
    
    Specified by:
    
    isTransactional in class Command
    
    Returns:
    true if it is
  - isQuery
```
public boolean isQuery()
```
    Description copied from class: Command
    
    Check if this command is a query.
    
    Specified by:
    
    isQuery in interface CommandInterface
    
    Specified by:
    
    isQuery in class Command
    
    Returns:
    true if it is
  - prepareJoinBatch
```
public void prepareJoinBatch()
```
    Description copied from class: Command
    
    Prepare join batching.
    
    Specified by:
    
    prepareJoinBatch in class Command
  - update
```
public ResultWithGeneratedKeys update(java.lang.Object generatedKeysRequest)
```
    Description copied from class: Command
    
    Execute an updating statement (for example insert, delete, or update), if this is possible.
    
    Specified by:
    
    update in class Command
    
    Parameters:
    generatedKeysRequest - false if generated keys are not needed, true if generated keys should be configured automatically, int[] to specify column indices to return generated keys from, or String[] to specify column names to return generated keys from
    
    Returns:
    the update count and generated keys, if any
  - query
```
public ResultInterface query(int maxrows)
```
    Description copied from class: Command
    
    Execute a query statement, if this is possible.
    
    Specified by:
    
    query in class Command
    
    Parameters:
    maxrows - the maximum number of rows returned
    
    Returns:
    the local result set
  - stop
```
public void stop()
```
    Description copied from interface: CommandInterface
    
    Stop the command execution, release all locks and resources
    
    Specified by:
    
    stop in interface CommandInterface
    
    Overrides:
    
    stop in class Command
  - canReuse
```
public boolean canReuse()
```
    Description copied from class: Command
    
    Whether the command is already closed (in which case it can be re-used).
    
    Overrides:
    
    canReuse in class Command
    
    Returns:
    true if it can be re-used
  - isReadOnly
```
public boolean isReadOnly()
```
    Description copied from class: Command
    
    Check if this command is read only.
    
    Specified by:
    
    isReadOnly in class Command
    
    Returns:
    true if it is
  - queryMeta
```
public ResultInterface queryMeta()
```
    Description copied from class: Command
    
    Get an empty result set containing the meta data.
    
    Specified by:
    
    queryMeta in class Command
    
    Returns:
    an empty result set
  - isCacheable
```
public boolean isCacheable()
```
    Overrides:
    
    isCacheable in class Command
  - getCommandType
```
public int getCommandType()
```
    Description copied from interface: CommandInterface
    
    Get command type.
    
    Returns:
    one of the constants above
  - getDependencies
```
public java.util.Set<DbObject> getDependencies()
```
    Specified by:
    
    getDependencies in class Command

Class CommandContainer

Field Summary

Fields inherited from class org.h2.command.Command

Fields inherited from interface org.h2.command.CommandInterface

Method Summary

Methods inherited from class org.h2.command.Command

Methods inherited from class java.lang.Object

Method Detail

getParameters

isTransactional

isQuery

prepareJoinBatch

update

query

stop

canReuse

isReadOnly

queryMeta

isCacheable

getCommandType

getDependencies