IBM DB2 Batch Source - CDAP Documentation (original) (raw)
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The IBM DB2 Batch Source plugin is available in the Hub.
Plugin version: 1.7.0
Reads from a DB2 using a configurable SQL query. Outputs one record for each row returned by the query. For example, you may want to create daily snapshots of a database table by using this source and writing to a partitioned table on BigQuery.
Configuration
| Property | Macro Enabled? | Version Introduced | Description |
|---|
| Property | Macro Enabled? | Version Introduced | Description |
|---|---|---|---|
| Reference Name | No | Required. Name used to uniquely identify this source for lineage, annotating metadata, etc. | |
| Driver Name | No | Required. Name of the JDBC driver to use.Default is db211. | |
| Host | Yes | Required. Host that DB2 is running on.Default is localhost. | |
| Port | Yes | Required. Port that DB2 is listening to.Default is 50000. | |
| Database | Yes | Required. DB2 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 ‘$CONDITIONS’ string. For example, ‘SELECT * FROM table WHERE CONDITIONS’.The‘CONDITIONS’. The ‘CONDITIONS’.The‘CONDITIONS’ string will be replaced by Split-by Field Name field limits specified by the bounding query. The ‘$CONDITIONS’ string is not required if Number of Splits to Generate is set to 1. | |
| Bounding Query | Yes | Required. Bounding Query should return the minimum and maximum of the values of the Split-by Field Name field. For example, SELECT MIN(id),MAX(id) FROM table. Not required if Number of Splits to Generate is set to 1. | |
| Split-By Field Name | Yes | Field Name which will be used to generate splits. Not required if Number of Splits to Generate is set to one. | |
| Number of Splits to Generate | Yes | Number of splits to generate.Default is 1. | |
| 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. | |
| Connection Arguments | Yes | 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. |
Data Type Mappings
| DB2 Data Type | CDAP Schema Data Type |
|---|
| DB2 Data Type | CDAP Schema Data Type |
|---|---|
| SMALLINT | int |
| INTEGER | int |
| BIGINT | long |
| DECIMAL(p,s) or NUMERIC(p,s) | decimal |
| DECFLOAT | string |
| REAL | float |
| DOUBLE | double |
| CHAR | string |
| VARCHAR | string |
| CHAR(n) FOR BIT DATA | bytes |
| VARCHAR(n) FOR BIT DATA | bytes |
| BINARY | bytes |
| VARBINARY | bytes |
| GRAPHIC | string |
| VARGRAPHIC | string |
| CLOB | string |
| BLOB | bytes |
| DCLOB | string |
| DATE | date |
| TIME | time |
| TIMESTAMP | timestamp |
Example
Suppose you want to read data from DB2 database named “prod” that is running on “localhost”, port 50000, as “sa” user with “Test11” password (Ensure that the driver for DB2 is installed. You can also provide driver name for some specific driver, otherwise “db211” will be used), then configure plugin with:
| Property | Value |
|---|---|
| Reference Name | src1 |
| Driver Name | db211 |
| Host | localhost |
| Port | 50000 |
| Database | prod |
| Import Query | "select id, name, email, phone from users;" |
| Number of Splits | 1 |
| Username | sa |
| Password | Test11 |
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 |