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.:
• 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_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.