tBlockedFuzzyJoin Standard properties - 7.0

Fuzzy matching

author
Talend Documentation Team
EnrichVersion
7.0
EnrichProdName
Talend Big Data Platform
Talend Data Fabric
Talend Data Management Platform
Talend Data Services Platform
Talend MDM Platform
Talend Real-Time Big Data Platform
task
Data Governance > Third-party systems > Data Quality components > Matching components > Fuzzy matching components
Data Quality and Preparation > Third-party systems > Data Quality components > Matching components > Fuzzy matching components
Design and Development > Third-party systems > Data Quality components > Matching components > Fuzzy matching components
EnrichPlatform
Talend Studio

These properties are used to configure tBlockedFuzzyJoin running in the Standard Job framework.

The Standard tBlockedFuzzyJoin component belongs to the Data Quality family.

This component is available in Talend Data Management Platform, Talend Big Data Platform, Talend Real Time Big Data Platform, Talend Data Services Platform, Talend MDM Platform and Talend Data Fabric.

Basic settings

Schema and Edit Schema

A schema is a row description, it defines the number of fields to be processed and passed on to the next component. The schema is either Built-in or stored remotely in the Repository.

 

Built-in: You create and store the schema locally for this component only. Related topic: see Talend Studio User Guide .

 

Repository: You have already created and stored the schema in the Repository. You can reuse it in other projects and Job designs. Related topic: see Talend Studio User Guide .

Replace output column with lookup column if matches or possible matches

Select this check box to replace the output column with the lookup column in case of match or possible match values.

Input key attribute

Select the column(s) from the main flow that needs to be checked against the reference (lookup) key column.

Lookup key attribute

Select the lookup key columns that you will use as a reference against which to compare the columns from the input flow.

Matching type

Select the relevant matching algorithm from the list:

Exact Match: matches each processed entry to all possible reference entries that have exactly the same value.

Levenshtein: Based on the edit distance theory. It calculates the number of insertion, deletion or substitution required for an entry to match the reference entry.

Metaphone: Based on a phonetic algorithm for indexing entries by their pronunciation. It first loads the phonetics of all entries of the lookup reference and checks all entries of the main flow against the entries of the reference flow.

Double Metaphone: a new version of the Metaphone phonetic algorithm, that produces more accurate results than the original algorithm. It can return both a primary and a secondary code for a string. This accounts for some ambiguous cases as well as for multiple variants of surnames with common ancestry.

Case sensitive

Select this check box to consider the letter case.

Min. distance

Only for Levenshtein. Set the minimum number of changes allowed to match the reference. If set to 0, only perfect matches(Exact Match) are returned.

Note:

You can create and store context variables for the minimum and maximum distances and then have your Job to loop on these values in order to start from a low max number to match rows and go up to higher max number to match more possible rows. You can press Ctrl+Space to access the variable list and select the new context variables. For more information about context variables, see Talend Studio User Guide.

Max. distance

Only for Levenshtein. Set the maximum number of changes allowed to match the reference.

Advanced settings

tStat Catcher Statistics

Select this check box to collect log data at the component level.

Global Variables

Global Variables

ERROR_MESSAGE: the error message generated by the component when an error occurs. This is an After variable and it returns a string. This variable functions only if the Die on error check box is cleared, if the component has this check box.

A Flow variable functions during the execution of a component while an After variable functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl + Space to access the variable list and choose the variable to use from it.

For further information about variables, see Talend Studio User Guide.

Usage

Usage rule

This component is deprecated, use the tRecordMatching component instead.

This component is not startable (green background) and it requires two input components and one or more output components.