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sql_insert processor

Inserts rows into an SQL database for each message, and leaves the message unchanged.

# Common config fields, showing default values
pipeline:
  processors:
    - label: ""
      sql_insert:
        driver: "" # No default (required)
        dsn: "" # No default (required)
        table: "" # No default (required)
        columns: [] # No default (required)
        args_mapping: "" # No default (required)

If the insert fails to execute then the message will still remain unchanged and the error can be caught using error handling methods.

Examples​

Table Insert (MySQL)​

Here we insert rows into a database by populating the columns id, name and topic with values extracted from messages and metadata:

pipeline:
  processors:
    - sql_insert:
        driver: mysql
        dsn: foouser:foopassword@tcp(localhost:3306)/foodb
        table: footable
        columns: [ id, name, topic ]
        args_mapping: |
          root = [
            this.user.id,
            this.user.name,
            meta("kafka_topic"),
          ]

Fields​

driver​

A database driver to use.

Type: string

Options: mysql, postgres, pgx, clickhouse, mssql, sqlite, oracle, snowflake, trino, gocosmos, spanner, databricks

dsn​

A Data Source Name to identify the target database.

==== Drivers

The following is a list of supported drivers, their placeholder style, and their respective DSN formats:

|=== | Driver | Data Source Name Format

| clickhouse | [clickhouse://[username[:password\](https://github.com/ClickHouse/clickhouse-go#dsn)@\][netloc\][:port\]/dbname[?param1=value1&...&paramN=valueN\]^]

| mysql | [username[:password]@][protocol[(address)]]/dbname[?param1=value1&...&paramN=valueN]

| postgres and pgx | postgres://[user[:password]@][netloc][:port][/dbname][?param1=value1&...]

| mssql | sqlserver://[user[:password]@][netloc][:port][?database=dbname&param1=value1&...]

| sqlite | file:/path/to/filename.db[?param&=value1&...]

| oracle | oracle://[username[:password]@][netloc][:port]/service_name?server=server2&server=server3

| snowflake | username[:password]@account_identifier/dbname/schemaname[?param1=value&...&paramN=valueN]

| trino | [http[s\](https://github.com/trinodb/trino-go-client#dsn-data-source-name)://user[:pass\]@host[:port\][?parameters\]^]

| gocosmos | [AccountEndpoint=<cosmosdb-endpoint>;AccountKey=<cosmosdb-account-key>[;TimeoutMs=<timeout-in-ms>\](https://pkg.go.dev/github.com/microsoft/gocosmos#readme-example-usage)[;Version=<cosmosdb-api-version>\][;DefaultDb/Db=<db-name>\][;AutoId=<true/false>\][;InsecureSkipVerify=<true/false>\]^]

| spanner | projects/[PROJECT]/instances/[INSTANCE]/databases/[DATABASE]

| databricks | token:<access-token>@<server-hostname>:<port>/<http-path> |===

Please note that the postgres and pgx drivers enforce SSL by default, you can override this with the parameter sslmode=disable if required. The pgx driver is an alternative to the standard postgres (pq) driver and comes with extra functionality such as support for array insertion.

The snowflake driver supports multiple DSN formats. Please consult the docs for more details. For key pair authentication, the DSN has the following format: <snowflake_user>@<snowflake_account>/<db_name>/<schema_name>?warehouse=<warehouse>&role=<role>&authenticator=snowflake_jwt&privateKey=<base64_url_encoded_private_key>, where the value for the privateKey parameter can be constructed from an unencrypted RSA private key file rsa_key.p8 using openssl enc -d -base64 -in rsa_key.p8 | basenc --base64url -w0 (you can use gbasenc instead of basenc on OSX if you install coreutils via Homebrew). If you have a password-encrypted private key, you can decrypt it using openssl pkcs8 -in rsa_key_encrypted.p8 -out rsa_key.p8. Also, make sure fields such as the username are URL-encoded.

The gocosmos driver is still experimental, but it has support for hierarchical partition keys as well as cross-partition queries. Please refer to the SQL notes for details.

Type: string

table​

The table to insert to.

Type: string

columns​

A list of columns to insert.

Type: array of string

args_mapping​

A Bloblang mapping which should evaluate to an array of values matching in size to the number of columns specified.

Type: string

prefix​

An optional prefix to prepend to the insert query (before INSERT).

Type: string

suffix​

An optional suffix to append to the insert query.

Type: string

options​

A list of keyword options to add before the INTO clause of the query.

Type: array of string

init_files​

An optional list of file paths containing SQL statements to execute immediately upon the first connection to the target database. This is a useful way to initialise tables before processing data. Glob patterns are supported, including super globs (double star).

Care should be taken to ensure that the statements are idempotent, and therefore would not cause issues when run multiple times after service restarts. If both init_statement and init_files are specified the init_statement is executed after the init_files.

If a statement fails for any reason a warning log will be emitted but the operation of this component will not be stopped.

Type: array of string

init_statement​

An optional SQL statement to execute immediately upon the first connection to the target database. This is a useful way to initialise tables before processing data. Care should be taken to ensure that the statement is idempotent, and therefore would not cause issues when run multiple times after service restarts.

If both init_statement and init_files are specified the init_statement is executed after the init_files.

If the statement fails for any reason a warning log will be emitted but the operation of this component will not be stopped.

Type: string

conn_max_idle_time​

An optional maximum amount of time a connection may be idle. Expired connections may be closed lazily before reuse. If value <= 0, connections are not closed due to a connections idle time.

Type: string

conn_max_life_time​

An optional maximum amount of time a connection may be reused. Expired connections may be closed lazily before reuse. If value <= 0, connections are not closed due to a connections age.

Type: string

conn_max_idle​

An optional maximum number of connections in the idle connection pool. If conn_max_open is greater than 0 but less than the new conn_max_idle, then the new conn_max_idle will be reduced to match the conn_max_open limit. If value <= 0, no idle connections are retained. The default max idle connections is currently 2. This may change in a future release.

Type: int
Default: 2

conn_max_open​

An optional maximum number of open connections to the database. If conn_max_idle is greater than 0 and the new conn_max_open is less than conn_max_idle, then conn_max_idle will be reduced to match the new conn_max_open limit. If value <= 0, then there is no limit on the number of open connections. The default is 0 (unlimited).

Type: int