Modifier and Type	Method	Description
`int`	`getBitsPerElement()`
`int`	`getCardinality()`	NOTE: When a realtime segment has no-dictionary columns, the cardinality for those columns will be set to `Constants.UNKNOWN_CARDINALITY`.
`int`	`getColumnMaxLength()`
`default String`	`getColumnName()`
`default FieldSpec.DataType`	`getDataType()`
`FieldSpec`	`getFieldSpec()`
`default FieldSpec.FieldType`	`getFieldType()`
`Map<ColumnIndexType,Long>`	`getIndexSizeMap()`
`int`	`getMaxNumberOfMultiValues()`
`Comparable`	`getMaxValue()`
`Comparable`	`getMinValue()`
`char`	`getPaddingCharacter()`
`PartitionFunction`	`getPartitionFunction()`
`Set<Integer>`	`getPartitions()`
`int`	`getTotalDocs()`
`int`	`getTotalNumberOfEntries()`
`boolean`	`hasDictionary()`
`boolean`	`isAutoGenerated()`
`default boolean`	`isMinMaxValueInvalid()`
`default boolean`	`isSingleValue()`
`boolean`	`isSorted()`

default FieldSpec.FieldType getFieldType()

default FieldSpec.DataType getDataType()

getCardinality
```
int getCardinality()
```
NOTE: When a realtime segment has no-dictionary columns, the cardinality for those columns will be set to Constants.UNKNOWN_CARDINALITY.

default boolean isMinMaxValueInvalid()

@Nullable
PartitionFunction getPartitionFunction()

Map<ColumnIndexType,Long> getIndexSizeMap()

Interface ColumnMetadata