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Frequently Asked Questions (FAQ) for PostgreSQL
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- Last updated: Wed Aug 10 15:29:42 EDT 2005
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+ Last updated: Thu Aug 11 09:21:58 EDT 2005
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Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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One limitation is that indexes can not be created on columns longer
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than about 2,000 characters. Fortunately, such indexes are rarely
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- needed. Uniqueness is best guaranteed using another column that is an
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- MD5 hash of the long column, and full text indexing allows for
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- searching of words within the column.
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+ needed. Uniqueness is best guaranteed by a funtion index of an MD5
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+ hash of the long column, and full text indexing allows for searching
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+ of words within the column.
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4.5) How much database disk space is required to store data from a typical
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text file?
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alink ="#0000ff ">
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< H1 > Frequently Asked Questions (FAQ) for PostgreSQL</ H1 >
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- < P > Last updated: Wed Aug 10 15:29:42 EDT 2005</ P >
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+ < P > Last updated: Thu Aug 11 09:21:58 EDT 2005</ P >
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< P > Current maintainer: Bruce Momjian (< A href =
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"mailto:pgman@candle.pha.pa.us "> pgman@candle.pha.pa.us</ A > )
@@ -619,8 +619,8 @@ <H3><A name="4.4">4.4</A>) What is the maximum size for a row, a
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< P > One limitation is that indexes can not be created on columns
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longer than about 2,000 characters. Fortunately, such indexes are
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- rarely needed. Uniqueness is best guaranteed using another column
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- that is an MD5 hash of the long column, and full text indexing
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+ rarely needed. Uniqueness is best guaranteed by a funtion index
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+ of an MD5 hash of the long column, and full text indexing
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allows for searching of words within the column.</ P >
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< H3 > < A name ="4.5 "> 4.5</ A > ) How much database disk space is required
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