Changes between Initial Version and Version 1 of UsersWikiPgRasterStorageModels


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Timestamp:
04/13/09 13:40:24 (16 years ago)
Author:
pierre
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  • UsersWikiPgRasterStorageModels

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     1== Pg Raster Storage Models ==
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     5PGRaster is intended to store raster data within a PostgreSQL relational database that uses the PostGIS extensions.  The following are some possible storage models:
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     7 * LO - Use PostgreSQL large object to hold raster data.
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     9 * TOAST - Use PostgreSQL bytea data type to hold raster data
     10For each table that has a "toastable" data type, PostgreSQL automatically creates an associated toast table, which can hold large data value out-of-line from the main table.   PostgreSQL automatically manages toast tables, creating and destroying them as needed without any special effort by the table's user.
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     12 * Multitable - Define a set of canonical table structures that work together to store the raster data and its metadata.
     13The PGRaster type is used effectively as a key into the raster tables.  This approach is more along the lines of Oracle's SDO_RASTER data type.