Class GenericStatement

java.lang.Object

org.apache.derby.impl.sql.GenericStatement

All Implemented Interfaces:

Statement

public class GenericStatement
extends Object
implements Statement

Field Summary

Fields

Modifier and Type	Field	Description
private final SchemaDescriptor	compilationSchema
private final boolean	isForReadOnly
private GenericPreparedStatement	preparedStmt
private int	prepareIsolationLevel
private final String	statementText

Constructor Summary

Constructors

Constructor	Description
GenericStatement(SchemaDescriptor compilationSchema, String statementText, boolean isForReadOnly)	Constructor for a Statement given the text of the statement in a String

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object other)
String	getCompilationSchema()
private static long	getCurrentTimeMillis(LanguageConnectionContext lcc)
PreparedStatement	getPreparedStatement()	Return the PreparedStatement currently associated with this statement.
String	getSource()	Return the SQL string that this statement is for.
int	hashCode()
PreparedStatement	prepare(LanguageConnectionContext lcc)	Generates an execution plan without executing it.
PreparedStatement	prepare(LanguageConnectionContext lcc, boolean forMetaData)	Generates an execution plan without executing it.
PreparedStatement	prepareStorable(LanguageConnectionContext lcc, PreparedStatement ps, Object[] paramDefaults, SchemaDescriptor spsSchema, boolean internalSQL)	Generates an execution plan given a set of named parameters.
private PreparedStatement	prepMinion(LanguageConnectionContext lcc, boolean cacheMe, Object[] paramDefaults, SchemaDescriptor spsSchema, boolean internalSQL)
private void	walkAST(LanguageConnectionContext lcc, Visitable queryTree, int phase)	Walk the AST, using a (user-supplied) Visitor

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Details

compilationSchema

private final SchemaDescriptor compilationSchema

statementText

private final String statementText

isForReadOnly

private final boolean isForReadOnly

prepareIsolationLevel

private int prepareIsolationLevel

preparedStmt

private GenericPreparedStatement preparedStmt

Constructor Details

GenericStatement

public GenericStatement(SchemaDescriptor compilationSchema,
 String statementText,
 boolean isForReadOnly)

Constructor for a Statement given the text of the statement in a String

Parameters:

compilationSchema - schema

statementText - The text of the statement

isForReadOnly - if the statement is opened with level CONCUR_READ_ONLY

Method Details

prepare

public PreparedStatement prepare(LanguageConnectionContext lcc)
                          throws StandardException

Description copied from interface: Statement

Generates an execution plan without executing it.

Specified by:

prepare in interface Statement

Returns:

A PreparedStatement that allows execution of the execution plan.

Throws:

StandardException - Thrown if this is an execution-only version of the module (the prepare() method relies on compilation).

prepare

public PreparedStatement prepare(LanguageConnectionContext lcc,
 boolean forMetaData)
                          throws StandardException

Description copied from interface: Statement

Generates an execution plan without executing it.

Specified by:

prepare in interface Statement

Parameters:

lcc - the language connection context

forMetaData - If this statement is for a metadata call then we will allow internal sql syntax on such statement. This internal sql syntax is not available to a user sql statement.

Returns:

A PreparedStatement that allows execution of the execution plan.

Throws:

StandardException - Thrown if this is an execution-only version of the module (the prepare() method relies on compilation).

prepMinion

private PreparedStatement prepMinion(LanguageConnectionContext lcc,
 boolean cacheMe,
 Object[] paramDefaults,
 SchemaDescriptor spsSchema,
 boolean internalSQL)
                              throws StandardException

Throws:

StandardException

walkAST

private void walkAST(LanguageConnectionContext lcc,
 Visitable queryTree,
 int phase)
              throws StandardException

Walk the AST, using a (user-supplied) Visitor

Throws:

StandardException

prepareStorable

public PreparedStatement prepareStorable(LanguageConnectionContext lcc,
 PreparedStatement ps,
 Object[] paramDefaults,
 SchemaDescriptor spsSchema,
 boolean internalSQL)
                                  throws StandardException

Generates an execution plan given a set of named parameters. Does so for a storable prepared statement.

Specified by:

prepareStorable in interface Statement

Parameters:

lcc - Compiler state variable.

ps - Prepared statement

paramDefaults - Parameter defaults

spsSchema - schema of the stored prepared statement

Returns:

A PreparedStatement that allows execution of the execution plan.

Throws:

StandardException - Thrown if this is an execution-only version of the module (the prepare() method relies on compilation).

getSource

public String getSource()

Description copied from interface: Statement

Return the SQL string that this statement is for.

Specified by:

getSource in interface Statement

Returns:

the SQL string this statement is for.

getCompilationSchema

public String getCompilationSchema()

getCurrentTimeMillis

private static long getCurrentTimeMillis(LanguageConnectionContext lcc)

getPreparedStatement

public PreparedStatement getPreparedStatement()

Return the PreparedStatement currently associated with this statement.

Returns:

the prepared statement that is associated with this statement

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object