API:EPrints/Database/mysql: Difference between revisions
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Return the counter. Use with cautiuon. | Return the counter. Use with cautiuon. | ||
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Revision as of 10:47, 25 August 2011
EPrints 3 Reference: Directory Structure - Metadata Fields - Repository Configuration - XML Config Files - XML Export Format - EPrints data structure - Core API - Data Objects
Latest Source Code (3.4, 3.3) | Revision Log | Before editing this page please read Pod2Wiki
NAME
EPrints::Database::mysql - custom database methods for MySQL DB
DESCRIPTION
MySQL database wrapper.
MySQL-specific Annoyances
MySQL does not support sequences.
MySQL is (by default) lax about truncation.
METHODS
get_server_version
$version = $db->get_server_version
Return the database server version.
create_counters
$n = $db->create_counters()
Create and initialise the counters.
has_table
$boolean = $db->has_table( $tablename )
Return true if the a table of the given name exists in the database.
has_column
$boolean = $db->has_column( $tablename, $columnname )
Return true if the a table of the given name has a column named $columnname in the database.
has_counter
$success = $db->has_counter( $counter )
Returns true if $counter exists.
counter_next
$n = $db->counter_next( $counter )
Return the next unused value for the named counter. Returns undef if the counter doesn't exist.
counter_minimum
$db->counter_minimum( $counter, $value )
Ensure that the counter is set no lower that $value. This is used when importing eprints which may not be in scrict sequence.
counter_reset
$db->counter_reset( $counter )
Return the counter. Use with cautiuon.
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