org.apache.druid.catalog.model.table

Class DatasourceDefn

java.lang.Object

org.apache.druid.catalog.model.ObjectDefn

org.apache.druid.catalog.model.TableDefn

org.apache.druid.catalog.model.table.DatasourceDefn

public class DatasourceDefn
extends TableDefn

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DatasourceDefn.HiddenColumnsDefn
static class	DatasourceDefn.SegmentGranularityFieldDefn

Field Summary

Fields

Modifier and Type	Field and Description
static String	ALL_GRANULARITY Catalog property value for the "all time" granularity.
static String	CLUSTER_KEYS_PROPERTY The clustering column names and sort order for each new segment.
static String	HIDDEN_COLUMNS_PROPERTY The set of existing columns to "delete" (actually, just hide) from the SQL layer.
static String	SEALED_PROPERTY By default: columns are optional hints.
static String	SEGMENT_GRANULARITY_PROPERTY Segment grain at ingestion and initial compaction.
static String	TABLE_TYPE
static String	TARGET_SEGMENT_ROWS_PROPERTY The target segment size at ingestion and initial compaction.

Fields inherited from class org.apache.druid.catalog.model.TableDefn

DESCRIPTION_PROPERTY

Constructor Summary

Constructors

Constructor and Description
DatasourceDefn()

Method Summary

Modifier and Type	Method and Description
static boolean	isDatasource(ResolvedTable table)
static boolean	isDatasource(String tableType)
protected void	validateColumn(ColumnSpec spec) Table-specific validation of a column spec.

Methods inherited from class org.apache.druid.catalog.model.TableDefn

bind, merge, mergeColumns, validate, validateColumns

Methods inherited from class org.apache.druid.catalog.model.ObjectDefn

mergeProperties, name, properties, property, toPropertyMap, typeValue, validate

Methods inherited from class java.lang.Object

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

Field Detail

SEGMENT_GRANULARITY_PROPERTY

public static final String SEGMENT_GRANULARITY_PROPERTY

Segment grain at ingestion and initial compaction. Aging rules may override the value as segments age. If not provided here, then it must be provided at ingestion time.

See Also:

Constant Field Values

ALL_GRANULARITY

public static final String ALL_GRANULARITY

Catalog property value for the "all time" granularity.

See Also:

Constant Field Values

TARGET_SEGMENT_ROWS_PROPERTY

public static final String TARGET_SEGMENT_ROWS_PROPERTY

The target segment size at ingestion and initial compaction. If unset, then the system setting is used.

See Also:

Constant Field Values

CLUSTER_KEYS_PROPERTY

public static final String CLUSTER_KEYS_PROPERTY

The clustering column names and sort order for each new segment.

See Also:

Constant Field Values

HIDDEN_COLUMNS_PROPERTY

public static final String HIDDEN_COLUMNS_PROPERTY

The set of existing columns to "delete" (actually, just hide) from the SQL layer. Used to "remove" unwanted columns to avoid the need to rewrite existing segments to accomplish the task.

See Also:

Constant Field Values

SEALED_PROPERTY

public static final String SEALED_PROPERTY

By default: columns are optional hints. If a datasource has columns defined, well validate them, but MSQ and other tools are free to create additional columns. That is, we assume "auto-discovered" columns by default. However, in some use cases, the schema may be carefully designed. This is especially true for ETL use cases in which multiple input schemas are mapped into a single datasource schema designed for ease of end user use. In this second use case, we may want to reject an attempt to ingest columns other than those in the schema. To do that, set sealed = true. In other words, "sealed" mode works like a traditional RDBMS.

See Also:

Constant Field Values

TABLE_TYPE

public static final String TABLE_TYPE

See Also:

Constant Field Values

Constructor Detail

DatasourceDefn

public DatasourceDefn()

Method Detail

validateColumn

protected void validateColumn(ColumnSpec spec)

Description copied from class: TableDefn

Table-specific validation of a column spec. Override for table definitions that need table-specific validation rules.

Overrides:

validateColumn in class TableDefn

isDatasource

public static boolean isDatasource(String tableType)

isDatasource

public static boolean isDatasource(ResolvedTable table)