Module metric_engine_consts

Constants used in metric engine.

Constants

ALTER_PHYSICAL_EXTENSION_KEY

HashMap key to be used in the region server’s extension response. Represent a list of column metadata that are added to physical table.

DATA_REGION_SUBDIR

DATA_SCHEMA_TABLE_ID_COLUMN_NAME

Column name of internal column __metric that stores the original metric name

DATA_SCHEMA_TSID_COLUMN_NAME

FILE_ENGINE_NAME

LOGICAL_TABLE_METADATA_KEY

Metadata key present in the CREATE TABLE ... WITH () clause. This key is used to identify a logical table and associate it with a corresponding physical table . E.g.:

MANIFEST_INFO_EXTENSION_KEY

HashMap key to be used in the region server’s extension response. Represent the manifest info of a region.

METADATA_REGION_SUBDIR

METADATA_SCHEMA_KEY_COLUMN_INDEX

METADATA_SCHEMA_KEY_COLUMN_NAME

METADATA_SCHEMA_TIMESTAMP_COLUMN_INDEX

METADATA_SCHEMA_TIMESTAMP_COLUMN_NAME

METADATA_SCHEMA_VALUE_COLUMN_INDEX

METADATA_SCHEMA_VALUE_COLUMN_NAME

METRIC_DATA_REGION_GROUP

region group value for data region inside a metric region

METRIC_ENGINE_INDEX_SKIPPING_INDEX_GRANULARITY_OPTION

Option key for the granularity of the skipping index in the metric engine. This key is used to specify the granularity of the primary key index (skipping index) in the metric engine.

METRIC_ENGINE_INDEX_SKIPPING_INDEX_GRANULARITY_OPTION_DEFAULT

Default granularity for the skipping index in the metric engine.

METRIC_ENGINE_INDEX_TYPE_OPTION

Option key for metric engine index type. Used to identify the primary key index type of the metric engine.

METRIC_ENGINE_NAME

METRIC_METADATA_REGION_GROUP

region group value for metadata region inside a metric region

PHYSICAL_TABLE_METADATA_KEY

Metadata key present in the CREATE TABLE ... WITH () clause. This key is used to identify the table is a physical metric table. E.g.:

Functions

is_metric_engine

Returns true if it’s metric engine

is_metric_engine_internal_column

Returns true if it’s a internal column of the metric engine.

is_metric_engine_option_key

Returns true if the key is a valid option key for the metric engine.