net.snowflake.client.core

Class SFStatement

java.lang.Object

net.snowflake.client.core.SFStatement

public class SFStatement
extends Object

Snowflake statement

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SFStatement.CallingMethod

Constructor Summary

Constructors

Constructor and Description
SFStatement(SFSession session)

Method Summary

Modifier and Type	Method and Description
void	addProperty(String propertyName, Object propertyValue) Add a statement parameter
void	cancel()
void	close()
SFStatementMetaData	describe(String sql) Describe a statement
SFBaseResultSet	execute(String sql, boolean asyncExec, Map<String,ParameterBindingDTO> parametersBinding, SFStatement.CallingMethod caller) Execute sql
Object	executeHelper(String sql, String mediaType, Map<String,ParameterBindingDTO> bindValues, boolean describeOnly, boolean internal, boolean asyncExec) A helper method to build URL and submit the SQL to snowflake for exec
void	executeSetProperty(String sql)
long	getConservativeMemoryLimit()
int	getConservativePrefetchThreads()
boolean	getMoreResults()
boolean	getMoreResults(int current) Sets the result set to the next one, if available.
SFBaseResultSet	getResultSet()
protected SFSession	getSession()
boolean	hasChildren()

Methods inherited from class java.lang.Object

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

Constructor Detail

SFStatement

public SFStatement(SFSession session)

Method Detail

addProperty

public void addProperty(String propertyName,
                        Object propertyValue)
                 throws SFException

Add a statement parameter

Make sure a property is not added more than once and the number of properties does not exceed limit.

Parameters:

propertyName - property name

propertyValue - property value

Throws:

SFException - if too many parameters for a statement

describe

public SFStatementMetaData describe(String sql)
                             throws SFException,
                                    SQLException

Describe a statement

Parameters:

sql - statement

Returns:

metadata of statement including result set metadata and binding information

Throws:

SQLException - if connection is already closed

SFException - if result set is null

executeHelper

public Object executeHelper(String sql,
                            String mediaType,
                            Map<String,ParameterBindingDTO> bindValues,
                            boolean describeOnly,
                            boolean internal,
                            boolean asyncExec)
                     throws SnowflakeSQLException,
                            SFException

A helper method to build URL and submit the SQL to snowflake for exec

Parameters:

sql - sql statement

mediaType - media type

bindValues - map of binding values

describeOnly - whether only show the result set metadata

internal - run internal query not showing up in history

Returns:

raw json response

Throws:

SFException - if query is canceled

SnowflakeSQLException - if query is already running

getConservativePrefetchThreads

public int getConservativePrefetchThreads()

Returns:

conservative prefetch threads before fetching results

getConservativeMemoryLimit

public long getConservativeMemoryLimit()

Returns:

conservative memory limit before fetching results

execute

public SFBaseResultSet execute(String sql,
                               boolean asyncExec,
                               Map<String,ParameterBindingDTO> parametersBinding,
                               SFStatement.CallingMethod caller)
                        throws SQLException,
                               SFException

Execute sql

Parameters:

sql - sql statement.

parametersBinding - parameters to bind

caller - the JDBC interface method that called this method, if any

Returns:

whether there is result set or not

Throws:

SQLException - if failed to execute sql

SFException - exception raised from Snowflake components

SQLException - if SQL error occurs

close

public void close()

cancel

public void cancel()
            throws SFException,
                   SQLException

Throws:

SFException

SQLException

executeSetProperty

public void executeSetProperty(String sql)

getSession

protected SFSession getSession()

getMoreResults

public boolean getMoreResults()
                       throws SQLException

Throws:

SQLException

getMoreResults

public boolean getMoreResults(int current)
                       throws SQLException

Sets the result set to the next one, if available.

Parameters:

current - What to do with the current result. One of Statement.CLOSE_CURRENT_RESULT, Statement.CLOSE_ALL_RESULTS, or Statement.KEEP_CURRENT_RESULT

Returns:

true if there is a next result and it's a result set false if there are no more results, or there is a next result and it's an update count

Throws:

SQLException - if something fails while getting the next result

getResultSet

public SFBaseResultSet getResultSet()

hasChildren

public boolean hasChildren()