n8n/docs/generated/postgres-schema/public.chat_hub_messages.md

public.chat_hub_messages

Columns

Name	Type	Default	Nullable	Children	Parents	Comment
agentId	uuid		true		public.chat_hub_agents	ID of the custom agent (if provider is "custom-agent")
attachments	json		true			File attachments for the message (if any), stored as JSON. Files are stored as base64-encoded data URLs.
content	text		false
createdAt	timestamp(3) with time zone	CURRENT_TIMESTAMP(3)	false
executionId	integer		true		public.execution_entity
id	uuid		false	public.chat_hub_messages
model	varchar(256)		true			Model name used at the respective Model node, ie. "gpt-4"
name	varchar(128)		false
previousMessageId	uuid		true		public.chat_hub_messages
provider	varchar(16)		true			ChatHubProvider enum: "openai", "anthropic", "google", "n8n"
retryOfMessageId	uuid		true		public.chat_hub_messages
revisionOfMessageId	uuid		true		public.chat_hub_messages
sessionId	uuid		false		public.chat_hub_sessions
status	varchar(16)	'success'::character varying	false			ChatHubMessageStatus enum, eg. "success", "error", "running", "cancelled"
type	varchar(16)		false			ChatHubMessageType enum: "human", "ai", "system", "tool", "generic"
updatedAt	timestamp(3) with time zone	CURRENT_TIMESTAMP(3)	false
workflowId	varchar(36)		true		public.workflow_entity

Constraints

Name	Type	Definition
FK_1f4998c8a7dec9e00a9ab15550e	FOREIGN KEY	FOREIGN KEY ("revisionOfMessageId") REFERENCES chat_hub_messages(id) ON DELETE CASCADE
FK_25c9736e7f769f3a005eef4b372	FOREIGN KEY	FOREIGN KEY ("retryOfMessageId") REFERENCES chat_hub_messages(id) ON DELETE CASCADE
FK_6afb260449dd7a9b85355d4e0c9	FOREIGN KEY	FOREIGN KEY ("executionId") REFERENCES execution_entity(id) ON DELETE SET NULL
FK_acf8926098f063cdbbad8497fd1	FOREIGN KEY	FOREIGN KEY ("workflowId") REFERENCES workflow_entity(id) ON DELETE SET NULL
FK_chat_hub_messages_agentId	FOREIGN KEY	FOREIGN KEY ("agentId") REFERENCES chat_hub_agents(id) ON DELETE SET NULL
FK_e22538eb50a71a17954cd7e076c	FOREIGN KEY	FOREIGN KEY ("sessionId") REFERENCES chat_hub_sessions(id) ON DELETE CASCADE
FK_e5d1fa722c5a8d38ac204746662	FOREIGN KEY	FOREIGN KEY ("previousMessageId") REFERENCES chat_hub_messages(id) ON DELETE CASCADE
PK_7704a5add6baed43eef835f0bfb	PRIMARY KEY	PRIMARY KEY (id)
chat_hub_messages_content_not_null	n	NOT NULL content
chat_hub_messages_createdAt_not_null	n	NOT NULL "createdAt"
chat_hub_messages_id_not_null	n	NOT NULL id
chat_hub_messages_name_not_null	n	NOT NULL name
chat_hub_messages_sessionId_not_null	n	NOT NULL "sessionId"
chat_hub_messages_status_not_null	n	NOT NULL status
chat_hub_messages_type_not_null	n	NOT NULL type
chat_hub_messages_updatedAt_not_null	n	NOT NULL "updatedAt"

Indexes

Name	Definition
IDX_chat_hub_messages_sessionId	CREATE INDEX "IDX_chat_hub_messages_sessionId" ON public.chat_hub_messages USING btree ("sessionId")
PK_7704a5add6baed43eef835f0bfb	CREATE UNIQUE INDEX "PK_7704a5add6baed43eef835f0bfb" ON public.chat_hub_messages USING btree (id)

Relations

erDiagram

"public.chat_hub_messages" }o--o| "public.chat_hub_agents" : "FOREIGN KEY (#quot;agentId#quot;) REFERENCES chat_hub_agents(id) ON DELETE SET NULL"
"public.chat_hub_messages" }o--o| "public.execution_entity" : "FOREIGN KEY (#quot;executionId#quot;) REFERENCES execution_entity(id) ON DELETE SET NULL"
"public.chat_hub_messages" }o--o| "public.chat_hub_messages" : "FOREIGN KEY (#quot;revisionOfMessageId#quot;) REFERENCES chat_hub_messages(id) ON DELETE CASCADE"
"public.chat_hub_messages" }o--o| "public.chat_hub_messages" : "FOREIGN KEY (#quot;retryOfMessageId#quot;) REFERENCES chat_hub_messages(id) ON DELETE CASCADE"
"public.chat_hub_messages" }o--o| "public.chat_hub_messages" : "FOREIGN KEY (#quot;previousMessageId#quot;) REFERENCES chat_hub_messages(id) ON DELETE CASCADE"
"public.chat_hub_messages" }o--|| "public.chat_hub_sessions" : "FOREIGN KEY (#quot;sessionId#quot;) REFERENCES chat_hub_sessions(id) ON DELETE CASCADE"
"public.chat_hub_messages" }o--o| "public.workflow_entity" : "FOREIGN KEY (#quot;workflowId#quot;) REFERENCES workflow_entity(id) ON DELETE SET NULL"

"public.chat_hub_messages" {
  uuid agentId FK
  json attachments
  text content
  timestamp_3__with_time_zone createdAt
  integer executionId FK
  uuid id
  varchar_256_ model
  varchar_128_ name
  uuid previousMessageId FK
  varchar_16_ provider
  uuid retryOfMessageId FK
  uuid revisionOfMessageId FK
  uuid sessionId FK
  varchar_16_ status
  varchar_16_ type
  timestamp_3__with_time_zone updatedAt
  varchar_36_ workflowId FK
}
"public.chat_hub_agents" {
  timestamp_3__with_time_zone createdAt
  varchar_36_ credentialId FK
  varchar_512_ description
  json files
  json icon
  uuid id
  varchar_64_ model
  varchar_256_ name
  uuid ownerId FK
  varchar_16_ provider
  json suggestedPrompts
  text systemPrompt
  timestamp_3__with_time_zone updatedAt
}
"public.execution_entity" {
  bigint binaryDataSizeBytes
  timestamp_3__with_time_zone createdAt
  varchar_255_ deduplicationKey
  timestamp_3__with_time_zone deletedAt
  boolean finished
  integer id
  bigint jsonSizeBytes
  varchar mode
  varchar retryOf
  varchar retrySuccessId
  timestamp_3__with_time_zone startedAt
  varchar status
  timestamp_3__with_time_zone stoppedAt
  varchar_2_ storedAt
  json tracingContext
  boolean usedPrivateCredentials
  timestamp_3__with_time_zone waitTill
  varchar_36_ workflowId FK
  varchar_36_ workflowVersionId
}
"public.chat_hub_sessions" {
  uuid agentId FK
  varchar_128_ agentName
  timestamp_3__with_time_zone createdAt
  varchar_36_ credentialId FK
  uuid id
  timestamp_3__with_time_zone lastMessageAt
  varchar_256_ model
  uuid ownerId FK
  varchar_16_ provider
  varchar_256_ title
  varchar_16_ type
  timestamp_3__with_time_zone updatedAt
  varchar_36_ workflowId FK
}
"public.workflow_entity" {
  boolean active
  varchar_36_ activeVersionId FK
  json connections
  timestamp_3__with_time_zone createdAt
  text description
  varchar_36_ id
  boolean isArchived
  json meta
  varchar_128_ name
  json nodeGroups
  json nodes
  varchar_36_ parentFolderId FK
  json pinData
  json settings
  varchar sourceWorkflowId
  json staticData
  integer triggerCount
  timestamp_3__with_time_zone updatedAt
  integer versionCounter
  character_36_ versionId
}

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