Get variables

Description

The Get Variables transform allows you to get the value of a variable and returns rows or adds values to existing input rows.

For example, you can specify: ${java.io.tmpdir}/hop/tempfile.txt and it will be expanded to /tmp/hop/tempfile.txt on Unix-like systems.

See also the Set Variables transform. To convert the Variable into a data type other than String use Select Values - Meta Data tab. To get system values, including command line arguments, use the Get System Info transform.

Supported Engines

Hop Engine

Supported

Spark

Maybe Supported

Flink

Maybe Supported

Dataflow

Maybe Supported

Options

Option	Description
transform Name	The name of this transform as it appears in the pipeline workspace.
Name	Name of the field.
Variable	Allows you to enter variables as complete strings to return rows or add values to input rows. For example, you can specify: ${java.io.tmpdir}/hop/tempfile.txt and it will be expanded to /tmp/hop/tempfile.txt on Unix-like systems.
Type	Specifies the field type: String, Date, Number, Boolean, Integer, BigNumber, Serializable, or Binary.
Format	Allows you to specify the format of the field after the type has been determined.
Length	For Number: Total number of significant figures in a number; For String: total length of string; For Date: length of printed output of the string (for example, entering 4 would only return the year).
Precision	For Number: Number of floating point digits. Not used for String, Date, or Boolean.
Currency	Used to interpret numbers with currency symbols. For example, $10,000.00 or E5.000,00.
Decimal	Used to indicate whether to use a period (".") or comma (",") for number values.
Group	Used to indicate whether to use a period (".") or comma (",") for number values.
TrimType	Type trim this field before processing: select either none, left, right, or both (left and right).

Option

Description

transform Name

The name of this transform as it appears in the pipeline workspace.

Name

Name of the field.

Variable

Allows you to enter variables as complete strings to return rows or add values to input rows. For example, you can specify: ${java.io.tmpdir}/hop/tempfile.txt and it will be expanded to /tmp/hop/tempfile.txt on Unix-like systems.

Type

Specifies the field type: String, Date, Number, Boolean, Integer, BigNumber, Serializable, or Binary.

Format

Allows you to specify the format of the field after the type has been determined.

Length

For Number: Total number of significant figures in a number; For String: total length of string; For Date: length of printed output of the string (for example, entering 4 would only return the year).

Precision

For Number: Number of floating point digits. Not used for String, Date, or Boolean.

Currency

Used to interpret numbers with currency symbols. For example, $10,000.00 or E5.000,00.

Decimal

Used to indicate whether to use a period (".") or comma (",") for number values.

Group

Used to indicate whether to use a period (".") or comma (",") for number values.

TrimType

Type trim this field before processing: select either none, left, right, or both (left and right).

Metadata Injection Support

All fields of this transform support metadata injection. You can use this transform with ETL Metadata Injection to pass metadata to your pipeline at runtime.