> ## Documentation Index > Fetch the complete documentation index at: https://launchdarkly-preview.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Warehouse Data Export schema reference > This topic explains the different event kinds for warehouse Data Export destinations. > For the complete documentation index, see [llms.txt](/llms.txt). For the full documentation snapshot, see [llms-full.txt](/llms-full.txt). ## Overview This topic explains the different event kinds for warehouse Data Export destinations. The schemas for warehouse Data Export destinations are formatted differently than LaunchDarkly's [streaming Data Export integrations](/integrations/data-export/schema-reference). ## Evaluation events The `evaluation_events` table includes details for each individual feature flag evaluation. The schema fans out flag evaluations with multi-contexts into separate rows, one for each context. Evaluations that occurred as an experiment exposure include an `experiment_iteration_id`. \| Column name \| Type \| Example | Description | | - | \| --- \| --- \| --- | \| event\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `671a6cc51ac07d3f1be70ab2` \| The ID of the event. | \| flag\_key \| string (BigQuery, Databricks)
varchar (Snowflake) \| `flag-key` \| The key of the feature flag requested. | \| context\_key \| string (BigQuery, Databricks)
varchar (Snowflake) \| `example-user-key` \| The key of the context that the flag was evaluated for. | \| context\_kind \| string (BigQuery, Databricks)
varchar (Snowflake) \| `user` \| The kind of the context that the flag was evaluated for. | \| context\_attributes \| JSON (BigQuery)
string (Databricks)
variant (Snowflake) \| `{ "attribute_name": "attribute_value" }` \| The attributes of the context that the flag was evaluated for. | \| variation\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `e4959af7-0481-4878-b9c3-a3075c1cf685` \| The ID of the variation of the flag requested. | \| variation\_value \| JSON (BigQuery)
string (Databricks)
variant (Snowflake) \| `false` \| The value of the variation that the flag served. | \| reason\_kind (optional) \| string (BigQuery, Databricks)
varchar (Snowflake) \| `FALLTHROUGH` \| The reason a context instance receives a given flag variation. Included only if the flag being evaluated was in an experiment and the target was part of the experiment allocation, or if you called a variation detail method. | \| reason\_detail (optional) \| JSON (BigQuery)
string (Databricks)
variant (Snowflake) \| `{ "in_experiment": true }` \| Other attributes detailing the reason for the flag variation. | \| experiment\_iteration\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `14e2dff3-cbf9-4ffc-b99e-88c83555f4c6` \| The ID of an associated experiment iteration. Included only if the flag was evaluated as an experiment exposure. | \| received\_time \| timestamp \| `2024-10-22T17:00:00Z` \| The time (UTC) the evaluation event was received in second precision. | \| created\_time \| timestamp \| `2024-10-22T17:00:00.000Z` \| The time (UTC) the evaluation event was created in millisecond precision. | \| environment\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `671874fe99197c658ae2cbd2` \| The client-side ID for the LaunchDarkly environment. | \| export\_key (primary key) \| string (BigQuery, Databricks)
varchar (Snowflake) \| `ceec8d94-2a31-4981-9a20-1fb7f5cb44e3` \| This key is generated by hashing the combined event\_id, context\_kind, and context\_key. | ## Metric events The `metric_events` table includes custom metric events, which the SDK produces when the client application calls the SDK's [track method](/sdk/features/events). \| Column name \| Type \| Example | Description | | - | \| --- \| --- \| --- | \| event\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `671a6cd294bbf76b5dfdd870` \| The ID of the event. | \| kind \| string (BigQuery, Databricks)
varchar (Snowflake) \| `custom` \| The kind of the event. Only custom metric events are available. | \| context\_kind \| string (BigQuery, Databricks)
varchar (Snowflake) \| `user` \| The kind of the context for the metric event. | \| context\_key \| string (BigQuery, Databricks)
varchar (Snowflake) \| `example-user-key` \| The key of the context for the metric event. | \| context\_attributes \| JSON (BigQuery)
string (Databricks)
variant (Snowflake) \| `{ "attribute_name": "attribute_value" }` \| The attributes of the context for the metric event. | \| event\_key \| string (BigQuery, Databricks)
varchar (Snowflake) \| `order-placed` \| The event key. | \| event\_value (optional) \| float \| `3.1` \| The event value. | \| data (optional) \| JSON (BigQuery)
string (Databricks)
variant (Snowflake) \| `{ "some-key": "customer-provided-data" }` \| Custom data attached to the event. | \| received\_time \| timestamp \| `2024-10-22T17:00:00Z` \| The time (UTC) the metric event was received in second precision. | \| created\_time \| timestamp \| `2024-10-22T17:00:00.000Z` \| The time (UTC) the metric event was created in millisecond precision. | \| environment\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `671874fe99197c658ae2cbd2` \| The client-side ID for the LaunchDarkly environment. | \| export\_key (primary key) \| string (BigQuery, Databricks)
varchar (Snowflake) \| `16aa074e-d311-4bd8-90cc-2ea5f7924a8f` \| This key is generated by hashing the combined event\_id, context\_kind, and context\_key. | ## Experiment iterations The `experiment_iterations` table includes metadata about the experiment iterations created for your LaunchDarkly environment. \| Column name \| Type \| Example | Description | | - | \| --- \| --- \| --- | \| iteration\_id (primary key) \| string (BigQuery, Databricks)
varchar (Snowflake) \| `14e2dff3-cbf9-4ffc-b99e-88c83555f4c6` \| The ID of the experiment iteration. | \| iteration\_number \| number \| `1` \| The experiment iteration number. | \| experiment\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `4f045bb9-d853-4cfe-af06-299f96480119` \| The ID of the experiment. | \| experiment\_name \| string (BigQuery, Databricks)
varchar (Snowflake) \| `My sales volume experiment` \| The name of the experiment. | \| randomization\_unit \| string (BigQuery, Databricks)
varchar (Snowflake) \| `user` \| The context kind chosen as the randomization unit for the experiment. | \| started\_at \| timestamp \| `2024-10-22T15:00:00Z` \| The start time (UTC) of the experiment. | \| ended\_at (optional) \| timestamp \| `null` \| The end time (UTC) of the experiment. | \| updated\_at \| timestamp \| `2024-10-22T15:00:00Z` \| The time (UTC) that this iteration or experiment was last updated. | \| environment\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `671874fe99197c658ae2cbd2` \| The client-side ID for the LaunchDarkly environment. | ## Experiment arm parameters The `experiment_arm_parameters` table includes metadata about the experiment arms you created for your experiments, including the flag variations configured for them. \| Column name \| Type \| Example | Description | | - | \| --- \| --- \| --- | \| arm\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `62c977b6-6b1d-4559-9326-7b2be677c30e` \| The ID of the experiment arm. | \| arm\_name \| string (BigQuery, Databricks)
varchar (Snowflake) \| `control` \| The name of the experiment arm. | \| experiment\_iteration\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `14e2dff3-cbf9-4ffc-b99e-88c83555f4c6` \| The ID of the experiment iteration. | \| flag\_variation\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `e4959af7-0481-4878-b9c3-a3075c1cf685` \| The ID of the flag variation configured for the experiment arm. | \| flag\_variation\_value \| JSON (BigQuery)
string (Databricks)
variant (Snowflake) \| `false` \| The value of the flag variation. | \| is\_arm\_baseline \| boolean \| `true` \| Whether the experiment arm is the baseline. | \| updated\_at \| timestamp \| `2024-10-22T15:00:00Z` \| The time (UTC) that this experiment arm was last updated. | \| environment\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `671874fe99197c658ae2cbd2` \| The client-side ID for the LaunchDarkly environment. | \| export\_key (primary key) \| string (BigQuery, Databricks)
varchar (Snowflake) \| `d1628066-49c7-45a9-ad7f-03339fc76245` \| This key is generated by hashing the combined arm\_id and variation\_id. | ## Flag variations The `flag_variations` table includes metadata about your feature flags and their flag variations. Fields on this table are mutable, and the exported table will be updated to reflect their most up-to-date states. At this time, cloned flags and their variations are missing from the exported data. \| Column name \| Type \| Example | Description | | - | \| --- \| --- \| --- | \| variation\_id (primary key) \| string (BigQuery, Databricks)
varchar (Snowflake) \| `e4959af7-0481-4878-b9c3-a3075c1cf685` \| The ID of the flag variation. | \| variation\_name (optional) \| string (BigQuery, Databricks)
varchar (Snowflake) \| `control` \| The name of the flag variation. | \| variation\_value \| JSON (BigQuery)
string (Databricks)
variant (Snowflake) \| `false` \| The value of the flag variation. | \| flag\_key \| string (BigQuery, Databricks)
varchar (Snowflake) \| `flag-key-123bc` \| The key of the feature flag. | \| flag\_name \| string (BigQuery, Databricks)
varchar (Snowflake) \| `My boolean flag` \| The name of the feature flag. | \| updated\_at \| timestamp \| `2024-10-22T14:00:00Z` \| The time (UTC) the flag or variation was last updated. | \| environment\_id \| string (BigQuery, Databricks)
varchar (Snowflake) \| `671874fe99197c658ae2cbd2` \| The client-side ID for the LaunchDarkly environment. | ## Launch Darkly internal tablesTables prefixed with `ld_internal_` are for LaunchDarkly internal use only, and are subject to change without warning.