sql_raw

Executes an arbitrary SQL query for each message.

Introduced in version 3.65.0.

Common
Advanced

# Common config fields, showing default values
output:
  label: ""
  sql_raw:
    driver: ""
    dsn: ""
    query: ""
    args_mapping: ""
    max_in_flight: 64
    batching:
      count: 0
      byte_size: 0
      period: ""
      check: ""

# All config fields, showing default values
output:
  label: ""
  sql_raw:
    driver: ""
    dsn: ""
    query: ""
    unsafe_dynamic_query: false
    args_mapping: ""
    max_in_flight: 64
    init_files: []
    init_statement: ""
    conn_max_idle_time: ""
    conn_max_life_time: ""
    conn_max_idle: 2
    conn_max_open: 0
    batching:
      count: 0
      byte_size: 0
      period: ""
      check: ""
      processors: []

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:

output:
  sql_raw:
    driver: mysql
    dsn: foouser:foopassword@tcp(localhost:3306)/foodb
    query: "INSERT INTO footable (id, name, topic) VALUES (?, ?, ?);"
    args_mapping: |
      root = [
        this.user.id,
        this.user.name,
        meta("kafka_topic"),
      ]

Fields

`driver`

A database driver to use.

Type: string
Options: mysql, postgres, clickhouse, mssql, sqlite, oracle, snowflake, trino.

`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]@][netloc][:port]/dbname[?param1=value1&...&paramN=valueN]`
`mysql`	`[username[:password]@][protocol[(address)]]/dbname[?param1=value1&...&paramN=valueN]`
`postgres`	`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]://user[:pass]@host[:port][?parameters]`

Please note that the postgres driver enforces SSL by default, you can override this with the parameter sslmode=disable if required.

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 insted 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.

Type: string

# Examples

dsn: clickhouse://username:password@host1:9000,host2:9000/database?dial_timeout=200ms&max_execution_time=60

dsn: foouser:foopassword@tcp(localhost:3306)/foodb

dsn: postgres://foouser:foopass@localhost:5432/foodb?sslmode=disable

dsn: oracle://foouser:foopass@localhost:1521/service_name

`query`

The query to execute. The style of placeholder to use depends on the driver, some drivers require question marks (?) whereas others expect incrementing dollar signs ($1, $2, and so on). The style to use is outlined in this table:

Driver	Placeholder Style
`clickhouse`	Dollar sign
`mysql`	Question mark
`postgres`	Dollar sign
`mssql`	Question mark
`sqlite`	Question mark
`oracle`	Colon
`snowflake`	Question mark
`trino`	Question mark

Type: string

# Examples

query: INSERT INTO footable (foo, bar, baz) VALUES (?, ?, ?);

`unsafe_dynamic_query`

Whether to enable interpolation functions in the query. Great care should be made to ensure your queries are defended against injection attacks.

Type: bool
Default: false

`args_mapping`

An optional Bloblang mapping which should evaluate to an array of values matching in size to the number of placeholder arguments in the field query.

Type: string

# Examples

args_mapping: root = [ this.cat.meow, this.doc.woofs[0] ]

args_mapping: root = [ meta("user.id") ]

`max_in_flight`

The maximum number of inserts to run in parallel.

Type: int
Default: 64

`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
Requires version 4.10.0 or newer

# Examples

init_files:
  - ./init/*.sql

init_files:
  - ./foo.sql
  - ./bar.sql

`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
Requires version 4.10.0 or newer

# Examples

init_statement: |2
  CREATE TABLE IF NOT EXISTS some_table (
    foo varchar(50) not null,
    bar integer,
    baz varchar(50),
    primary key (foo)
  ) WITHOUT ROWID;

`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 connection's 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 connection's 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

`batching`

Allows you to configure a batching policy.

Type: object

# Examples

batching:
  byte_size: 5000
  count: 0
  period: 1s

batching:
  count: 10
  period: 1s

batching:
  check: this.contains("END BATCH")
  count: 0
  period: 1m

`batching.count`

A number of messages at which the batch should be flushed. If 0 disables count based batching.

Type: int
Default: 0

`batching.byte_size`

An amount of bytes at which the batch should be flushed. If 0 disables size based batching.

Type: int
Default: 0

`batching.period`

A period in which an incomplete batch should be flushed regardless of its size.

Type: string
Default: ""

# Examples

period: 1s

period: 1m

period: 500ms

`batching.check`

A Bloblang query that should return a boolean value indicating whether a message should end a batch.

Type: string
Default: ""

# Examples

check: this.type == "end_of_transaction"

`batching.processors`

A list of processors to apply to a batch as it is flushed. This allows you to aggregate and archive the batch however you see fit. Please note that all resulting messages are flushed as a single batch, therefore splitting the batch into smaller batches using these processors is a no-op.

Type: array

# Examples

processors:
  - archive:
      format: concatenate

processors:
  - archive:
      format: lines

processors:
  - archive:
      format: json_array

Examples​

Fields​

driver​

dsn​

Drivers​

query​

unsafe_dynamic_query​

args_mapping​

max_in_flight​

init_files​

init_statement​

conn_max_idle_time​

conn_max_life_time​

conn_max_idle​

conn_max_open​

batching​

batching.count​

batching.byte_size​

batching.period​

batching.check​

batching.processors​

Examples

Fields

`driver`

`dsn`

Drivers

`query`

`unsafe_dynamic_query`

`args_mapping`

`max_in_flight`

`init_files`

`init_statement`

`conn_max_idle_time`

`conn_max_life_time`

`conn_max_idle`

`conn_max_open`

`batching`

`batching.count`

`batching.byte_size`

`batching.period`

`batching.check`

`batching.processors`