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S

Search extraction

Searchable

SQL

Stepper

Stream

Stream Type

StroomQl

1 - Search extraction

The process of extracting un-indexed Field values from the source Event to be used in search results.

2 - Searchable

A Searchable is the term given the special searchable data sources that appear at the root of the explorer tree picker when selecting a data source. These data sources are special internal data sources that are not user managed content, unlike an Index. They provide the means to search various aspects of Stroom’s internals, such as the Meta Store or Processor Tasks.

3 - SQL

Structured Query Language (SQL). The language used in the MySQL database to query and manipulate the data.

SQL is used by Stroom’s database migration scripts to modify the structure of the database schema and the data contained within it. Sometimes it is necessary for Stroom administrators to manually run SQL statements/queries as part of pre-migration checks.

4 - Stepper

The Stepper is a tool in Stroom for developing and debugging a Pipeline. It allows the user to simulate passing a Stream through a pipeline with the ability to step from one record/event to the next or to jump to records/events based on filter criteria.

The parsers and translations can be edited while in the Stepper with the element output updating to show the effect of the change. The stepper will not write data to the file system or stream stores.

5 - Stream

A Stream is the unit of data that Stroom works with and will typically contain many Events.

6 - Stream Type

All Streams must have a Stream Type. The list of Stream Types is configured using the Property stroom.data.meta.metaTypes.

Additional Stream Types can be added however the list of Stream Types must include the following built-in types:

Some Stream Types, such as Meta and Context only exist as child streams within another Stream.

7 - StroomQl

Stroom Query Language is Stroom’s own query language. It has similarities with Structured Query Language (SQL) as used in databases. StroomQL is sometimes referred to as sQL to distinguish it from SQL.