Package org.apache.druid.catalog.model

Class Columns

java.lang.Object

org.apache.druid.catalog.model.Columns

public class Columns
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static String	BIGINT
static String	DOUBLE
static Map<org.apache.druid.segment.column.ColumnType,String>	DRUID_TO_SQL_TYPES
static String	FLOAT
static Set<String>	NUMERIC_TYPES
static Set<String>	SCALAR_TYPES
static Map<String,org.apache.druid.segment.column.ColumnType>	SQL_TO_DRUID_TYPES
static String	TIME_COLUMN
static String	TIMESTAMP
static String	VARCHAR

Method Summary

Modifier and Type	Method	Description
static org.apache.druid.segment.column.RowSignature	convertSignature(List<ColumnSpec> columns)
static org.apache.druid.segment.column.ColumnType	druidType(String sqlType)
static boolean	isScalar(String type)
static boolean	isTimeColumn(String name)
static boolean	isTimestamp(String type)
static String	sqlType(org.apache.druid.segment.column.ColumnType druidType)
static void	validateScalarColumn(String name, String type)

Methods inherited from class java.lang.Object

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

Field Detail

TIME_COLUMN

public static final String TIME_COLUMN

See Also:

Constant Field Values

VARCHAR

public static final String VARCHAR

See Also:

Constant Field Values

BIGINT

public static final String BIGINT

See Also:

Constant Field Values

FLOAT

public static final String FLOAT

See Also:

Constant Field Values

DOUBLE

public static final String DOUBLE

See Also:

Constant Field Values

TIMESTAMP

public static final String TIMESTAMP

See Also:

Constant Field Values

NUMERIC_TYPES

public static final Set<String> NUMERIC_TYPES

SCALAR_TYPES

public static final Set<String> SCALAR_TYPES

SQL_TO_DRUID_TYPES

public static final Map<String,org.apache.druid.segment.column.ColumnType> SQL_TO_DRUID_TYPES

DRUID_TO_SQL_TYPES

public static final Map<org.apache.druid.segment.column.ColumnType,String> DRUID_TO_SQL_TYPES

Method Detail

isTimestamp

public static boolean isTimestamp(String type)

isScalar

public static boolean isScalar(String type)

druidType

public static org.apache.druid.segment.column.ColumnType druidType(String sqlType)

validateScalarColumn

public static void validateScalarColumn(String name,
                                        String type)

isTimeColumn

public static boolean isTimeColumn(String name)

convertSignature

public static org.apache.druid.segment.column.RowSignature convertSignature(List<ColumnSpec> columns)

sqlType

public static String sqlType(org.apache.druid.segment.column.ColumnType druidType)