MariaDB Batch Source
The MariaDB Batch source plugin is available in the Hub.
Plugin version: 1.7.0
Reads from a MariaDB instance using a configurable SQL query. Outputs one record for each row returned by the query.
Use this source when you need to read from a MariaDB instance. For example, you may want to create daily snapshots of a database table by using this source and writing to a BigQuery table.
Configuration
Property | Macro Enabled? | Version Introduced | Description |
|---|---|---|---|
Reference Name | No |
| Required. This will be used to uniquely identify this source for lineage, annotating metadata, etc. |
Host | Yes |
| Required. Host that MariaDB is running on. Default is localhost. |
Port | Yes |
| Required. Port that MariaDB is running on. Default is 3306. |
Database | Yes |
| Required. MariaDB database name. |
Import Query | Yes |
| Required. The SELECT query to use to import data from the specified table. You can specify an arbitrary number of columns to import, or import all columns using *. The Query should contain the ‘$CONDITIONS’ string. For example, ‘SELECT * FROM table WHERE $CONDITIONS’. The ‘$CONDITIONS’ string will be replaced by Split-By Field Name field limits specified by the bounding query. The ‘$CONDITIONS’ string is not required if Number of Splits to Generate is set to 1. |
Bounding Query | Yes |
| Required. Bounding Query should return the min and max of the values of the ‘splitBy’ field. For example, ‘SELECT MIN(id),MAX(id) FROM table’. Not required if numSplits is set to one. |
Split-By Field Name | Yes |
| Optional. Field Name which will be used to generate splits. Not required if Number of Splits to Generate is set to 1. |
Number of Splits to Generate | Yes |
| Optional. Number of splits to generate. |
Fetch Size | Yes | 6.6.0/1.7.0 | Optional. The number of rows to fetch at a time per split. Larger Fetch Size can result in faster import with the trade-off of higher memory usage. Default is 1000. |
Username | Yes |
| Optional. User identity for connecting to the specified database. |
Password | Yes |
| Optional. Password to use to connect to the specified database. |
Use SSL | No |
| Optional. Turns on SSL encryption. The connection will fail if SSL is not available. Default is |
Keystore URL | No |
| Optional. URL to the client certificate KeyStore (if not specified, use defaults). Must be accessible at the same location on host where CDAP Master is running and all hosts on which at least one HDFS, MapReduce, or YARN daemon role is running. |
Keystore Password | No |
| Optional. Password for the client certificates KeyStore. |
Truststore URL | No |
| Optional. URL to the trusted root certificate KeyStore (if not specified, use defaults). Must be accessible at the same location on host where CDAP Master is running and all hosts on which at least one HDFS, MapReduce, or YARN daemon role is running. |
Truststore Password | No |
| Optional. Password for the trusted root certificates KeyStore. |
Driver Name | No |
| Optional. Name of the JDBC driver to use. Default is mariadb. |
Use Compression | No |
| Optional. Use zlib compression when communicating with the server. Select this option for WAN connections. Default is No. |
Use ANSI Quotes | No |
| Optional. Treats “ as an identifier quote character and not as a string quote character. |
Connection Arguments | No |
| Optional. A list of arbitrary string key/value pairs as connection arguments. These arguments will be passed to the JDBC driver as connection arguments for JDBC drivers that may need additional configurations. |
Auto Reconnect | No |
| Optional. Should the driver try to re-establish stale and/or dead connections. Default is No. |
Output Schema | No |
| The schema of records output by the source. This will be used in place of whatever schema comes back from the query. However, it must match the schema that comes back from the query, except it can mark fields as nullable and can contain a subset of the fields. |
Data Type Mapping
MariaDB Data Type | CDAP Schema Data Type | Comments |
|---|---|---|
TINYINT | int |
|
BOOLEAN, BOOL | boolean |
|
SMALLINT | int |
|
MEDIUMINT | int |
|
INT, INTEGER | int |
|
BIGINT | long |
|
DECIMAL, DEC, NUMERIC, FIXED | decimal |
|
FLOAT | float |
|
DOUBLE, DOUBLE PRECISION, REAL | decimal |
|
BIT | boolean |
|
CHAR | string |
|
VARCHAR | string |
|
BINARY | bytes |
|
CHAR BYTE | bytes |
|
VARBINARY | bytes |
|
TINYBLOB | bytes |
|
BLOB | bytes |
|
MEDIUMBLOB | bytes |
|
LONGBLOB | bytes |
|
TINYTEXT | string |
|
TEXT | string |
|
MEDIUMTEXT | string |
|
LONGTEXT | string |
|
JSON | string | In MariaDB it is alias to LONGTEXT |
ENUM | string | Mapping to String by default |
SET | string |
|
DATE | date |
|
TIME | time_micros |
|
DATETIME | timestamp_micros |
|
TIMESTAMP | timestamp_micros |
|
YEAR | date |
|
Example
Suppose you want to read data from MariaDB database named “prod” that is running on “localhost” port 3306, as “root” user with “root” password, then configure plugin with:
Property | Value |
|---|---|
Reference Name | src1 |
Driver Name | mariadb |
Host | localhost |
Port | 3306 |
Database | prod |
Import Query |
|
Number of Splits to Generate | 1 |
Username | root |
Password | root |
For example, if the ‘id’ column is a primary key of type int and the other columns are non-nullable varchars, output records will have this schema:
Field Name | Type |
|---|---|
id | int |
name | string |
string | |
phone | string |
Created in 2020 by Google Inc.