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Postcode 1 Postcode 2 Score Remarks
GB-A1H 2ZU Gb-a1h2zu 1.0
XX-12345 YY-12345 1.0 Invalid country codes
are 'equal'
D-12345 YY-12345 0.96 Valid and invalid
SQL Syntax
country code
(N)VARCHAR columns have to be defined as postcode columns to enable the fuzzy postcode search. You do this
by using the FUZZY SEARCH MODE clause.
In addition, it is also possible to increase the performance of the postcode search by activating a fuzzy search
index and by creating a database index on the postcode column.
CREATE COLUMN TABLE tab
(
id INTEGER PRIMARY KEY,
postcode NVARCHAR(20) FUZZY SEARCH INDEX ON FUZZY SEARCH MODE
'postcode'
);
CREATE INDEX myindex1 ON tab(postcode);
The postcode search can be enabled or disabled at a later point in time with the ALTER TABLE statement. Do not
specify the FUZZY SEARCH MODE clause to disable the postcode search.
-- enable postcode search
ALTER TABLE tab ALTER
(
postcode NVARCHAR(100) FUZZY SEARCH MODE 'postcode'
);
-- disable postcode search
ALTER TABLE tab ALTER
(
postcode NVARCHAR(100) FUZZY SEARCH MODE NULL
);
-- do not change the status of the search mode
ALTER TABLE tab ALTER
(
postcode NVARCHAR(100)
);
SAP HANA Developer Guide
Enabling Search
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