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Fill automatically a custom book column from full-search text query

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Do you know if is it posible to fill a custom column name "Rev" (for example) with the result of a query between metadata.db and full-text-search.db.

What i want to do is:

Look for a text inside de books like "Rev 1.3" using a regular expression and insert the result "1.3" in a custom column.

Could be done with language template in "template functions" and use this result to fill a custom colum?

I don't know if it's posible using this method and how to do this.

Could you help me, please.

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