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Note:
If the source table has a field name identical to one of the default fields from the $TA table, you will receive
an error message after the CREATE FULTTEXT INDEX statement informing you to rename the field of the
source table. After you rename the corresponding field, you can execute the CREATE FULLTEXT INDEX
statement again.
11.1.4 Dropping Full Text Indexes
If you want to delete a full text index that you manually created, for example, because it is referenced only rarely
or preprocessing is too time-consuming, you can drop the full text index. For TEXT or SHORTTEXT full text
indexes, you cannot drop the full text index; instead, you must delete the related column in the table.
You also need to drop full text indexes when adding or removing index parameters. As parameters cannot be
added to or removed from an existing full text index, if you want to change parameters, you must first drop the full
text index and then create a new index with the new parameters.
To drop a full text index, you use the DROP FULLTEXT INDEX statement:
DROP FULLTEXT INDEX
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Note: Before you can drop a full text index, you must remove the relationship between the source table
and any existing $TA tables (for text analysis). To do so, use the following statement:
ALTER TABLE SCHEMA DROP
The name constraint must be the same as originally used when adding the constraint. For more
information, see Text Analysis.
Altering Full Text Index Parameters [page 246]
You can alter a full text index after it is created. Altering an index includes changing the values of the
parameters and altering the parameters by replacing the index.
Text Analysis [page 242]
11.1.5 Altering Full Text Index Parameters
You can alter a full text index after it is created. Altering an index includes changing the values of the parameters
and altering the parameters by replacing the index.
● To alter the parameters of a full text index, use the ALTER FULLTEXT INDEX statement.
You can only use this statement to alter the following parameters:
○ Fuzzy search index
○ Phrase index ratio
Example syntax:
ALTER FULLTEXT INDEX
PHRASE INDEX RATIO
FUZZY SEARCH INDEX
● To alter any other parameter, you must replace the existing full text index as follows:
246
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