Frequently Asked Questions (FAQ) for PostgreSQL
- Last updated: Wed Aug 10 15:29:42 EDT 2005
+ Last updated: Thu Aug 11 09:21:58 EDT 2005
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
One limitation is that indexes can not be created on columns longer
than about 2,000 characters. Fortunately, such indexes are rarely
- needed. Uniqueness is best guaranteed using another column that is an
- MD5 hash of the long column, and full text indexing allows for
- searching of words within the column.
+ needed. Uniqueness is best guaranteed by a funtion index of an MD5
+ hash of the long column, and full text indexing allows for searching
+ of words within the column.
4.5) How much database disk space is required to store data from a typical
text file?
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<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
- <P>Last updated: Wed Aug 10 15:29:42 EDT 2005</P>
+ <P>Last updated: Thu Aug 11 09:21:58 EDT 2005</P>
<P>Current maintainer: Bruce Momjian (<A href=
"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)
<P>One limitation is that indexes can not be created on columns
longer than about 2,000 characters. Fortunately, such indexes are
- rarely needed. Uniqueness is best guaranteed using another column
- that is an MD5 hash of the long column, and full text indexing
+ rarely needed. Uniqueness is best guaranteed by a funtion index
+ of an MD5 hash of the long column, and full text indexing
allows for searching of words within the column.</P>
<H3><A name="4.5">4.5</A>) How much database disk space is required