Queries
Perform multiple queries to a DuckDb Database.
type: "io.kestra.plugin.jdbc.duckdb.Queries"Execute multiple queries that reads a csv, and outputs a select and a count.
id: queries_duckdb
namespace: company.team
tasks:
- id: http_download
type: io.kestra.plugin.core.http.Download
uri: "https://huggingface.co/datasets/kestra/datasets/raw/main/csv/orders.csv"
- id: queries
type: io.kestra.plugin.jdbc.duckdb.Queries
url: 'jdbc:duckdb:'
timeZoneId: Europe/Paris
sql: |-
CREATE TABLE new_tbl AS SELECT * FROM read_csv_auto('in.csv', header=True);
SELECT count(customer_name) FROM new_tbl;
SELECT customer_name FROM new_tbl;
inputFiles:
in.csv: "{{ outputs.http_download.uri }}"
YESjdbc:duckdb:The JDBC URL to connect to the database.
The default value, jdbc: duckdb: , will use a local in-memory database.
Set this property when connecting to a persisted database instance, for example jdbc: duckdb: md: my_database?motherduck_token=<my_token> to connect to MotherDuck.
YESDatabase URI
Kestra's URI to an existing Duck DB database file
NOfalseDEPRECATED, please use fetchType: FETCH instead.
Whether to fetch the data from the query result to the task output. This parameter is evaluated after fetchOne and store.
NOfalseDEPRECATED, please use fetchType: FETCH_ONE instead.
Whether to fetch only one data row from the query result to the task output. This parameter is evaluated before store and fetch.
YES10000Number 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.
YESNONESTOREFETCHFETCH_ONENONEThe way you want to store data.
FETCH_ONE - output the first row. FETCH - output all rows as output variable. STORE - store all rows to a file. NONE - do nothing.
YESInput files to be loaded from DuckDb.
Describe a files map that will be written and usable by DuckDb. You can reach files by their filename, example: SELECT * FROM read_csv_auto('myfile.csv');
YESfalseOutput the database file.
This property lets you define if you want to output the in-memory database as a file for further processing.
YESOutput file list that will be uploaded to internal storage.
List of keys that will generate temporary files.
On the SQL query, you can just use a variable named outputFiles.key for the corresponding file.
If you add a file with ["first"], you can use the special vars COPY tbl TO '{{ outputFiles.first }}' (HEADER, DELIMITER ','); and use this file in others tasks using {{ outputs.taskId.outputFiles.first }}.
YESParameters
A map of parameters to bind to the SQL queries. The keys should match the parameter placeholders in the SQL string, e.g., : parameterName.
YESThe database user's password.
YESThe SQL query to run.
NOfalseDEPRECATED, please use fetchType: STORE instead.
Whether to fetch data row(s) from the query result to a file in internal storage. File will be saved as Amazon Ion (text format).
See Amazon Ion documentation This parameter is evaluated after fetchOne but before fetch.
YESThe time zone id to use for date/time manipulation. Default value is the worker's default time zone id.
YEStrueTransaction
If one query failed, rollback transactions.
YESThe database user.
NOMap containing the first row of fetched data.
Only populated if fetchOne parameter is set to true.
NOList of map containing rows of fetched data.
Only populated if fetch parameter is set to true.
NOThe number of rows fetched.
Only populated if store or fetch parameter is set to true.
NOuriThe URI of the result file on Kestra's internal storage (.ion file / Amazon Ion formatted text file).
Only populated if store is set to true.