Package org.apache.calcite.avatica

Class QueryState

java.lang.Object

org.apache.calcite.avatica.QueryState

public class QueryState
extends java.lang.Object

A struct used to encapsulate the necessary information to reconstitute a ResultSet in the Avatica server.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	QueryState.StateType	An enumeration that represents how a ResultSet was created.

Field Summary

Fields

Modifier and Type	Field	Description
MetaDataOperation	metaDataOperation
java.lang.Object[]	operationArgs
java.lang.String	sql
QueryState.StateType	type

Constructor Summary

Constructors

Constructor	Description
QueryState()	Not intended for external use.
QueryState(java.lang.String sql)	Constructor encapsulating a SQL query used to create a result set.
QueryState(QueryState.StateType type, java.lang.String sql, MetaDataOperation op, java.lang.Object... args)	Not intended for external use.
QueryState(MetaDataOperation op, java.lang.Object... args)	Constructor encapsulating a metadata operation's result set.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object o)
static QueryState	fromProto(Common.QueryState protoState)
MetaDataOperation	getMetaDataOperation()
java.lang.Object[]	getOperationArgs()
java.lang.String	getSql()
QueryState.StateType	getType()
int	hashCode()
java.sql.ResultSet	invoke(java.sql.Connection conn, java.sql.Statement statement)
Common.QueryState	toProto()
private void	verifyOpArgs(int expectedArgs)

Methods inherited from class java.lang.Object

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

Field Detail

type

public final QueryState.StateType type

sql

public final java.lang.String sql

metaDataOperation

public final MetaDataOperation metaDataOperation

operationArgs

public final java.lang.Object[] operationArgs

Constructor Detail

QueryState

public QueryState(java.lang.String sql)

Constructor encapsulating a SQL query used to create a result set.

Parameters:

sql - The SQL query.

QueryState

public QueryState(MetaDataOperation op,
                  java.lang.Object... args)

Constructor encapsulating a metadata operation's result set.

Parameters:

op - A pointer to the DatabaseMetaData operation being invoked.

args - The arguments to the method being invoked.

QueryState

public QueryState(QueryState.StateType type,
                  java.lang.String sql,
                  MetaDataOperation op,
                  java.lang.Object... args)

Not intended for external use. For Jackson-databind only.

QueryState

public QueryState()

Not intended for external use. For Jackson-databind only.

Method Detail

getType

public QueryState.StateType getType()

Returns:

The QueryState.StateType for this encapsulated state.

getSql

public java.lang.String getSql()

Returns:

The SQL expression to invoke.

getMetaDataOperation

public MetaDataOperation getMetaDataOperation()

Returns:

The metadata operation to invoke.

getOperationArgs

public java.lang.Object[] getOperationArgs()

Returns:

The Arguments for the given metadata operation.

invoke

public java.sql.ResultSet invoke(java.sql.Connection conn,
                                 java.sql.Statement statement)
                          throws java.sql.SQLException

Throws:

java.sql.SQLException

verifyOpArgs

private void verifyOpArgs(int expectedArgs)

toProto

public Common.QueryState toProto()

fromProto

public static QueryState fromProto(Common.QueryState protoState)

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object