
PostgreSQL Trigger
CertifiedWait for query results on PostgreSQL and trigger flow
PostgreSQL Trigger
Wait for query results on PostgreSQL and trigger flow
Periodically polls a PostgreSQL database by executing a SQL query at the specified interval (default 60 seconds). Triggers a downstream flow execution when the query returns one or more rows. Supports parameterized queries and afterSQL for marking processed rows. Use fetchType to control result handling.
type: io.kestra.plugin.jdbc.postgresql.TriggerExamples
Wait for a SQL query to return results, and then iterate through rows.
id: jdbc_trigger
namespace: company.team
tasks:
- id: each
type: io.kestra.plugin.core.flow.ForEach
values: "{{ trigger.rows }}"
tasks:
- id: return
type: io.kestra.plugin.core.debug.Return
format: "{{ fromJson(taskrun.value) }}"
triggers:
- id: watch
type: io.kestra.plugin.jdbc.postgresql.Trigger
interval: "PT5M"
url: jdbc:postgresql://127.0.0.1:56982/
username: pg_user
password: "{{ secret('PG_PASSWORD') }}"
sql: "SELECT id, status FROM my_table WHERE status = 'NEW'"
afterSQL: "UPDATE my_table SET status = 'PROCESSED' WHERE status = 'NEW'"
fetchType: FETCH
Properties
sql *Requiredstring
The SQL query to run
url *Requiredstring
The JDBC URL to connect to the database
afterSQL string
allowConcurrent Non-dynamicboolean
falseSpecifies whether a trigger is allowed to start a new execution even if a previous run is still in progress.
conditions Non-dynamic
List of conditions in order to limit the flow trigger.
Allow events only between two datetimes.
Compares a rendered date (defaults to {{ trigger.date }}) against optional after and before bounds expressed as ISO-8601 datetimes with zone.
You must provide at least one bound; if both are set the date must fall strictly between them. Missing both bounds triggers an evaluation error.
Trigger condition to execute the flow only after the specific date.
id: schedule_condition_datetimebetween
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will execute once every 5 minutes after the date 2025-12-31T23:59:59Z"
triggers:
- id: schedule
type: io.kestra.plugin.core.trigger.Schedule
cron: "*/5 * * * *"
conditions:
- type: io.kestra.plugin.core.condition.DateTimeBetween
date: "{{ trigger.date }}"
after: "2025-12-31T23:59:59Z"
Trigger condition to execute the flow between two specific dates.
id: schedule_condition_datetimebetween
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will be executed once every 5 minutes between the before and after dates"
triggers:
- id: schedule
type: io.kestra.plugin.core.trigger.Schedule
cron: "*/5 * * * *"
conditions:
- type: io.kestra.plugin.core.condition.DateTimeBetween
date: "{{ trigger.date }}"
after: "2025-01-01T00:00:00Z"
before: "2025-12-31T23:59:59Z"
io.kestra.plugin.core.condition.DateTimeBetweenio.kestra.core.models.conditions.types.DateTimeBetweenConditionio.kestra.plugin.core.condition.DateTimeBetweenConditionThe date to test must be after this one.
Must be a valid ISO 8601 datetime with the zone identifier (use 'Z' for the default zone identifier).
The date to test must be before this one.
Must be a valid ISO 8601 datetime with the zone identifier (use 'Z' for the default zone identifier).
{{ trigger.date }}The date to test.
Can be any variable or any valid ISO 8601 datetime. By default, it will use the trigger date.
Allow events on a specific weekday.
Renders a date (defaults to the trigger timestamp) and checks its day-of-week against the provided dayOfWeek.
Accepts ISO-8601 date/time strings; the comparison uses the rendered timezone.
Trigger condition to execute the flow only on a specific day of the week.
id: schedule_condition_dayweek
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will execute only on Mondays at 11:00 am."
triggers:
- id: schedule
type: io.kestra.plugin.core.trigger.Schedule
cron: "0 11 * * *"
conditions:
- type: io.kestra.plugin.core.condition.DayWeek
dayOfWeek: "MONDAY"
MONDAYTUESDAYWEDNESDAYTHURSDAYFRIDAYSATURDAYSUNDAYThe day of week.
io.kestra.plugin.core.condition.DayWeekio.kestra.core.models.conditions.types.DayWeekConditionio.kestra.plugin.core.condition.DayWeekCondition{{ trigger.date }}The date to test.
Can be any variable or any valid ISO 8601 datetime. By default, it will use the trigger date.
Allow events on an nth weekday within the month.
Renders a date (defaults to the trigger timestamp) and checks whether it matches the requested weekday and position in the month (FIRST, SECOND, THIRD, FOURTH, or LAST).
Useful for patterns like “first Monday” or “last Friday”. Dates must be valid ISO-8601 strings.
Trigger condition to execute the flow only on the first Monday of the month.
id: schedule_condition_dayweekinmonth
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will execute only on the first Monday of the month at 11:00 am."
triggers:
- id: schedule
type: io.kestra.plugin.core.trigger.Schedule
cron: "0 11 * * *"
conditions:
- type: io.kestra.plugin.core.condition.DayWeekInMonth
dayOfWeek: "MONDAY"
dayInMonth: FIRST
FIRSTLASTSECONDTHIRDFOURTHAre you looking for the first or the last day in the month?
MONDAYTUESDAYWEDNESDAYTHURSDAYFRIDAYSATURDAYSUNDAYThe day of week.
io.kestra.plugin.core.condition.DayWeekInMonthio.kestra.plugin.core.condition.DayWeekInMonthConditionio.kestra.core.models.conditions.types.DayWeekInMonthCondition{{ trigger.date }}The date to test.
Can be any variable or any valid ISO 8601 datetime. By default, it will use the trigger date.
Match events from a specific flow.
Passes only when the triggering execution belongs to the given Namespace and Flow ID.
Pair with the Flow trigger to react to a single upstream flow; for broader namespace matching use ExecutionNamespace.
Trigger condition to execute the flow based on execution of another flow.
id: flow_condition_executionflow
namespace: company.team
tasks:
- id: hello
type: io.kestra.plugin.core.log.Log
message: "This flow will execute when flow `flow_a` of namespace `company.team` enters RUNNING state."
triggers:
- id: flow_trigger
type: io.kestra.plugin.core.trigger.Flow
conditions:
- type: io.kestra.plugin.core.condition.ExecutionFlow
flowId: flow_a
namespace: company.team
states:
- RUNNING
The Flow ID
The Flow Namespace
io.kestra.plugin.core.condition.ExecutionFlowio.kestra.plugin.core.condition.ExecutionFlowConditionio.kestra.core.models.conditions.types.ExecutionFlowConditionMatch executions by label set.
Evaluates true only if the execution carries all provided labels. Labels can be declared as a map or list; system-reserved labels are rejected.
Useful for filtering Flow triggers to specific environments, owners, or any custom tagging strategy.
Trigger condition to execute the flow based on execution of another flow(s) with certain execution labels.
id: flow_condition_executionlabels
namespace: company.team
tasks:
- id: hello
type: io.kestra.plugin.core.log.Log
message: "This flow will execute when flow with specified labels enters FAILED state."
triggers:
- id: flow_trigger
type: io.kestra.plugin.core.trigger.Flow
conditions:
- type: io.kestra.plugin.core.condition.ExecutionLabels
labels:
owner: john.doe
env: prod
states:
- FAILED
List of labels to match in the execution.
io.kestra.plugin.core.condition.ExecutionLabelsio.kestra.core.models.conditions.types.ExecutionLabelsConditionio.kestra.plugin.core.condition.ExecutionLabelsConditionMatch executions by namespace.
Compares the triggering execution’s namespace against a target string using EQUALS, PREFIX, or SUFFIX. The prefix boolean is a shorthand for comparison: PREFIX.
If no comparison is set, it defaults to strict equality unless prefix is true.
Trigger condition to execute the flow based on execution of another flow(s) belonging to certain namespace.
id: flow_condition_executionnamespace
namespace: company.team
tasks:
- id: hello
type: io.kestra.plugin.core.log.Log
message: "This flow will execute when any flow within `company.engineering` namespace enters RUNNING state."
triggers:
- id: flow_trigger
type: io.kestra.plugin.core.trigger.Flow
conditions:
- type: io.kestra.plugin.core.condition.ExecutionNamespace
namespace: company.engineering
comparison: PREFIX
states:
- RUNNING
String against which to match the execution namespace depending on the provided comparison.
io.kestra.plugin.core.condition.ExecutionNamespaceio.kestra.core.models.conditions.types.ExecutionNamespaceConditionio.kestra.plugin.core.condition.ExecutionNamespaceConditionEQUALSPREFIXSUFFIXComparison to use when checking if namespace matches. If not provided, it will use EQUALS by default.
falseWhether to look at the flow namespace by prefix. Shortcut for comparison: PREFIX.
Only used when comparison is not set
Condition based on the outputs of an upstream execution.
Renders the provided boolean expression against the upstream execution outputs exposed under trigger.outputs.
If the execution exposes no outputs the condition is false and the expression is skipped. A rendered result of blank, space-only, or literal false is treated as false.
The upstream flow_a must explicitly define its outputs
to be used in the ExecutionOutputs condition.
id: flow_a
namespace: company.team
inputs:
- id: user_value
type: STRING
defaults: hello
tasks:
- id: hello
type: io.kestra.plugin.core.debug.Return
format: "{{ inputs.user_value }}"
outputs:
- id: flow_a_output
type: STRING
value: "{{ outputs.hello.value }}"
The flow_condition_executionoutputs will run whenever flow_a finishes successfully
and returns an output matching the value 'hello':
id: flow_condition_executionoutputs
namespace: company.team
tasks:
- id: upstream_outputs
type: io.kestra.plugin.core.log.Log
message: hello from a downstream flow
triggers:
- id: condition_on_flow_execution_outputs
type: io.kestra.plugin.core.trigger.Flow
states:
- SUCCESS
conditions:
- type: io.kestra.plugin.core.condition.ExecutionOutputs
expression: "{{ trigger.outputs.flow_a_output == 'hello' }}"
io.kestra.plugin.core.condition.ExecutionOutputsio.kestra.core.models.conditions.types.ExecutionOutputsConditionio.kestra.plugin.core.condition.ExecutionOutputsConditionMatch executions by status.
Passes when the triggering execution’s current state is included in in and not present in notIn.
If a list is empty it is ignored, so provide at least one of them to avoid unintentionally matching everything.
Trigger condition to execute the flow based on execution status of another flow(s).
id: flow_condition_executionstatus
namespace: company.team
tasks:
- id: hello
type: io.kestra.plugin.core.log.Log
message: "This flow will execute when any flow enters FAILED or KILLED state."
triggers:
- id: flow_trigger
type: io.kestra.plugin.core.trigger.Flow
conditions:
- type: io.kestra.plugin.core.condition.ExecutionStatus
in:
- FAILED
- KILLED
io.kestra.plugin.core.condition.ExecutionStatusio.kestra.core.models.conditions.types.ExecutionStatusConditionio.kestra.plugin.core.condition.ExecutionStatusConditionCREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTEDList of states that are authorized.
CREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTEDList of states that aren't authorized.
Condition based on variable expression.
Renders a templated expression and treats the result as truthy/falsey to decide whether the condition passes.
Blank strings or the literal false (case-sensitive) evaluate to false; everything else is true. Expressions can reference any flow variables available at evaluation time, so make sure they resolve without errors.
Trigger condition to execute the flow when the expression evaluates to true.
id: myflow
namespace: company.team
tasks:
- id: hello
type: io.kestra.plugin.core.log.Log
message: Average value has gone below 10
triggers:
- id: expression_trigger
type: io.kestra.plugin.core.trigger.Schedule
cron: "*/1 * * * *"
conditions:
- type: io.kestra.plugin.core.condition.Expression
expression: "{{ kv('average_value') < 10 }}"
io.kestra.plugin.core.condition.Expressionio.kestra.plugin.core.condition.ExpressionConditionio.kestra.core.models.conditions.types.VariableConditionMatch executions where a task was retried.
Passes if any task run has more than one attempt and its state satisfies in / notIn filters.
Provide in states to avoid matching nothing (an empty in list fails all attempts). Use with Flow triggers to react when retries occur.
Trigger condition when any flow task on retry enters the state specified in the in states under the HasRetryAttempt condition.
id: flow_condition_hasretryattempt
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will execute when any flow task on retry enters a specific state(s)."
triggers:
- id: flow_condition
type: io.kestra.plugin.core.trigger.Flow
conditions:
- type: io.kestra.plugin.core.condition.HasRetryAttempt
in:
- FAILED
io.kestra.plugin.core.condition.HasRetryAttemptio.kestra.plugin.core.condition.HasRetryAttemptConditionio.kestra.core.models.conditions.types.HasRetryAttemptConditionCREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTEDList of states that are authorized.
CREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTEDList of states that aren't authorized.
Invert one or more conditions.
Fails the evaluation if any nested condition is true; otherwise passes.
Combine with other schedule conditions to express “not these dates/states” patterns.
Trigger condition to execute the flow when the condition is not satisfied.
id: schedule_condition_not
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will execute on all days except Sunday at 11am."
triggers:
- id: schedule
type: io.kestra.plugin.core.trigger.Schedule
cron: "0 11 * * *"
conditions:
- type: io.kestra.plugin.core.condition.Not
conditions:
- type: io.kestra.plugin.core.condition.DayWeek
dayOfWeek: "SUNDAY"
1The list of conditions to exclude.
If any condition is true, it will prevent the event's execution.
io.kestra.plugin.core.condition.Notio.kestra.core.models.conditions.types.NotConditionio.kestra.plugin.core.condition.NotConditionPass when any condition is true.
Evaluates nested conditions and succeeds if at least one passes.
Useful for schedule scenarios like “weekends or holidays” without duplicating triggers.
Trigger condition to execute the flow when any of the conditions are satisfied.
id: schedule_condition_or
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will execute on Sundays and Mondays at 11am."
triggers:
- id: schedule
type: io.kestra.plugin.core.trigger.Schedule
cron: "0 11 * * *"
conditions:
- type: io.kestra.plugin.core.condition.Or
conditions:
- type: io.kestra.plugin.core.condition.DayWeek
dayOfWeek: "MONDAY"
- type: io.kestra.plugin.core.condition.DayWeek
dayOfWeek: "SUNDAY"
1The list of conditions to validate.
If any condition is true, it will allow the event's execution.
io.kestra.plugin.core.condition.Orio.kestra.core.models.conditions.types.OrConditionio.kestra.plugin.core.condition.OrConditionAllow events on public holidays.
Uses the Jollyday calendar to check whether a rendered date (defaults to {{ trigger.date }}) is a public holiday for the given country/sub-division.
If country is omitted, the default locale is used. Provide ISO 3166-1 (country) and optionally 3166-2 (region) codes.
Trigger condition to execute the flow only on public holidays.
id: schedule_condition_public-holiday
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will execute only on the public holidays of France at 11:00 am."
triggers:
- id: schedule
type: io.kestra.plugin.core.trigger.Schedule
cron: "0 11 * * *"
conditions:
- type: io.kestra.plugin.core.condition.PublicHoliday
country: FR
Trigger condition to execute the flow only on work days in France.
id: schedule-condition-work-days
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will execute only on the work days of France at 11:00 am."
triggers:
- id: schedule
type: io.kestra.plugin.core.trigger.Schedule
cron: "0 11 * * *"
conditions:
- type: io.kestra.plugin.core.condition.Not
conditions:
- type: io.kestra.plugin.core.condition.PublicHoliday
country: FR
- type: io.kestra.plugin.core.condition.Weekend
io.kestra.plugin.core.condition.PublicHolidayio.kestra.plugin.core.condition.PublicHolidayConditionio.kestra.core.models.conditions.types.PublicHolidayConditionISO 3166-1 alpha-2 country code. If not set, it uses the country code from the default locale.
It uses the Jollyday library for public holiday calendar that supports more than 70 countries.
{{ trigger.date}}The date to test.
Can be any variable or any valid ISO 8601 datetime. By default, it will use the trigger date.
ISO 3166-2 country subdivision (e.g., provinces and states) code.
It uses the Jollyday library for public holiday calendar that supports more than 70 countries.
Allow events between two times of day.
Compares the rendered date/time (defaults to the trigger timestamp) against optional after and before offsets (ISO-8601 times).
Supports ranges that cross midnight (e.g., 22: 00→02: 00). At least one bound is required; missing both raises an evaluation error.
Trigger condition to execute the flow between two specific times.
id: schedule_condition_timebetween
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will execute every 5 minutes between 4pm and 8pm."
triggers:
- id: schedule
type: io.kestra.plugin.core.trigger.Schedule
cron: "*/5 * * * *"
conditions:
- type: io.kestra.plugin.core.condition.TimeBetween
after: "16:00:00+02:00"
before: "20:00:00+02:00"
io.kestra.plugin.core.condition.TimeBetweenio.kestra.plugin.core.condition.TimeBetweenConditionio.kestra.core.models.conditions.types.TimeBetweenConditionThe time to test must be after this one.
Must be a valid ISO 8601 time with offset.
The time to test must be before this one.
Must be a valid ISO 8601 time with offset.
{{ trigger.date }}The time to test.
Can be any variable or any valid ISO 8601 time. By default, it will use the trigger date.
Allow events on weekends.
Renders a date (defaults to the trigger timestamp) and passes only if it falls on Saturday or Sunday.
Accepts ISO-8601 date/time strings; uses the rendered timezone to determine the day.
Trigger the flow only on weekend, i.e. on Saturdays and Sundays.
id: schedule_condition_weekend
namespace: company.team
tasks:
- id: log_message
type: io.kestra.plugin.core.log.Log
message: "This flow will execute only on weekends at 11:00 am."
triggers:
- id: schedule
type: io.kestra.plugin.core.trigger.Schedule
cron: "0 11 * * *"
conditions:
- type: io.kestra.plugin.core.condition.Weekend
io.kestra.plugin.core.condition.Weekendio.kestra.plugin.core.condition.WeekendConditionio.kestra.core.models.conditions.types.WeekendCondition{{ trigger.date }}The date to test.
Can be any variable or any valid ISO 8601 datetime. By default, it will use the trigger date.
connectionPoolSize integerstring
10Maximum number of pooled connections
Maximum connections held in the pool for a given URL and credentials. Default 10. Increase for flows that run many concurrent queries against the same database to avoid waiting for an available connection. Ignored when connectionPooling is false or for embedded drivers.
connectionPooling booleanstring
trueReuse database connections via a connection pool
When true (default), connections are pooled and reused across executions, keyed by URL and credentials, removing the connect and TLS-handshake cost on each run. Set to false if your SQL relies on session state persisting on the connection (for example SET search_path, session-scoped temp tables or variables), since pooled connections are reused. Embedded drivers (DuckDB, SQLite, MS Access) never pool regardless of this setting.
fetchSize integerstring
10000Number of rows that should be fetched
Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed for this ResultSet object. If the fetch size specified is zero, the JDBC driver ignores the value and is free to make its own best guess as to what the fetch size should be. Ignored if autoCommit is false.
fetchType string
FETCHSTOREFETCHFETCH_ONENONEThe way you want to fetch the data
Triggers default to FETCH, which loads all rows into memory and exposes them as {{ trigger.rows }}. A trigger fires only when the query returns at least one row; setting NONE would cause the trigger to never fire. Use FETCH_ONE to expose a single row as {{ trigger.row }}, or STORE to write the rows to internal storage and expose the file URI as {{ trigger.uri }}.
interval Non-dynamicstring
PT1MdurationInterval between polling.
The interval between 2 different polls of schedule, this can avoid to overload the remote system with too many calls. For most of the triggers that depend on external systems, a minimal interval must be at least PT30S. See ISO_8601 Durations for more information of available interval values.
parameters object
Parameters
A map of parameters to bind to the SQL queries. The keys should match the parameter placeholders in the SQL string, e.g., : parameterName.
password string
The database user's password
pluginDefaultsRef Non-dynamicstring
Reference (ref) of the pluginDefaults to apply to this trigger.
ssl booleanstring
falseIs the connection SSL?
sslCert string
The SSL cert
Must be a PEM encoded certificate
sslKey string
The SSL key
Must be a PEM encoded key
sslKeyPassword string
The SSL key password
sslMode string
DISABLEALLOWPREFERREQUIREVERIFY_CAVERIFY_FULLThe SSL mode
sslRootCert string
The SSL root cert
Must be a PEM encoded certificate
stopAfter Non-dynamicarray
CREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTEDList of execution states after which a trigger should be stopped (a.k.a. disabled).
timeZoneId string
The time zone id to use for date/time manipulation. Default value is the worker's default time zone id
username string
The database user
Outputs
row object
First row of fetched data
Only populated when fetchType is FETCH_ONE
rows array
List of all fetched rows
Only populated when fetchType is FETCH
size integer
Number of rows fetched
Only populated when fetchType is FETCH or STORE
uri string
uriURI of stored results in internal storage
Only populated when fetchType is STORE; file is stored in internal storage using ION format