hop-user-manual/modules/ROOT/pages/plugins/transforms/joinrows.adoc - incubator-hop-docs - Git at Google

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 = Join Rows

 == Description

 The Join rows transform allows you to produce combinations (Cartesian product) of all rows in the input streams.

 == Options

 [width="90%", options="header"]
 |===
 |Option|Description
 |Transform name|Name of the transform this name has to be unique in a single pipeline.
 |Temp directory|Specify the name of the directory where the system stores temporary files in case you want to combine more then the cached number of rows.
 |TMP-file prefix|This is the prefix of the temporary files that will be generated.
 |Max. cache size|The number of rows to cache before the system reads data from temporary files; required when you want to combine large row sets that do not fit into memory.
 |Main transform to read from|Specifies the transform from which to read most of the data; while the data from other transforms are cached or spooled to disk, the data from this transform is not.
 |The Condition(s)|You can enter a complex condition to limit the number of output row.
 |===

 == 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.
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	regarding copyright ownership. The ASF licenses this file
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	"License"); you may not use this file except in compliance
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	Unless required by applicable law or agreed to in writing,
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	:documentationPath: /plugins/transforms/
	:language: en_US
	:page-alternativeEditUrl: https://github.com/apache/incubator-hop/edit/master/plugins/transforms/joinrows/src/main/doc/joinrows.adoc

	= Join Rows

	== Description

	The Join rows transform allows you to produce combinations (Cartesian product) of all rows in the input streams.

	== Options

	[width="90%", options="header"]
	\|===
	\|Option\|Description
	\|Transform name\|Name of the transform this name has to be unique in a single pipeline.
	\|Temp directory\|Specify the name of the directory where the system stores temporary files in case you want to combine more then the cached number of rows.
	\|TMP-file prefix\|This is the prefix of the temporary files that will be generated.
	\|Max. cache size\|The number of rows to cache before the system reads data from temporary files; required when you want to combine large row sets that do not fit into memory.
	\|Main transform to read from\|Specifies the transform from which to read most of the data; while the data from other transforms are cached or spooled to disk, the data from this transform is not.
	\|The Condition(s)\|You can enter a complex condition to limit the number of output row.
	\|===

	== 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.