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INSERT INTO housenumbers VALUES ('10-12a');
INSERT INTO housenumbers VALUES ('10a');
INSERT INTO housenumbers VALUES ('10-14');
INSERT INTO housenumbers VALUES ('9');
SELECT TO_DECIMAL(SCORE(),3,2), *
FROM housenumbers
WHERE CONTAINS(housenumber, '5', FUZZY(0.8))
ORDER BY TO_DECIMAL(SCORE(),3,2) DESC;
SELECT TO_DECIMAL(SCORE(),3,2), *
FROM housenumbers
WHERE CONTAINS(housenumber, 'Nr. 5', FUZZY(0.8))
ORDER BY TO_DECIMAL(SCORE(),3,2) DESC;
SELECT TO_DECIMAL(SCORE(),3,2), *
FROM housenumbers
WHERE CONTAINS(housenumber, '8a-12', FUZZY(0.8))
ORDER BY TO_DECIMAL(SCORE(),3,2) DESC;
SELECT TO_DECIMAL(SCORE(),3,2), *
FROM housenumbers
WHERE CONTAINS(housenumber, '10-12', FUZZY(0.8))
ORDER BY TO_DECIMAL(SCORE(),3,2) DESC;
SELECT TO_DECIMAL(SCORE(),3,2), *
FROM housenumbers
WHERE CONTAINS(housenumber, '9 in the BACKYARD', FUZZY(0.8))
ORDER BY TO_DECIMAL(SCORE(),3,2) DESC;
Use Case Fuzzy Search - Postcodes
Postcodes in almost all countries are ordered by region. This means that if the leading characters of the
postcodes of two different addresses are the same, the addresses are near to each other. In Germany, for
example, addresses within large cities share the first or even the first two digits of their postcode.
The only exception known to the development team is Cambodia, where postcodes are not ordered by region.
When doing a fuzzy search on addresses, it makes sense to return a higher score for postcodes that are 'near' to a
given user input than for postcodes that are 'far away' from the user input. It makes sense to give a higher weight
to the leading characters and a lower weight to the trailing characters of the postcode.
Valid addresses may contain a country code in front of the postcode (for example, 'D-12345' or 'DE-12345' for a
German address). This is also supported by the fuzzy postcode search.
Score Calculation
Before the fuzzy score is calculated, the postcode strings are standardized.
1. Country codes are separated from the postcode strings. Country codes in this case consist of one to three
276
letters (a-z only, no numbers) at the beginning of the postcode, followed by a minus sign. Longer words are
not considered a country code because postal standards do not allow country names in front of the postcode.
P U B L I C
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SAP HANA Developer Guide
Enabling Search