Difference between revisions of "API:EPrints/Database/mysql"

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Revision as of 15:27, 16 December 2011

EPrints 3 Reference: Directory Structure - Metadata Fields - Repository Configuration - XML Config Files - XML Export Format - EPrints data structure - Core API - Data Objects


API: Core API

Latest Source Code (3.3, 3.2) | Revision Log | Before editing this page please read Pod2Wiki


NAME

EPrints::Database::mysql - custom database methods for MySQL DB

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DESCRIPTION

MySQL database wrapper.

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MySQL-specific Annoyances

MySQL does not support sequences.

MySQL is (by default) lax about truncation.

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METHODS

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get_server_version

$version = $db->get_server_version

Return the database server version.

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create_counters

$n = $db->create_counters()

Create and initialise the counters.

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has_table

$boolean = $db->has_table( $tablename )

Return true if the a table of the given name exists in the database.

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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.

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has_counter

$success = $db->has_counter( $counter )

Returns true if $counter exists.

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counter_next

$n = $db->counter_next( $counter )

Return the next unused value for the named counter. Returns undef if the counter doesn't exist.

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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.

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counter_reset

$db->counter_reset( $counter )

Return the counter. Use with cautiuon.

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COPYRIGHT

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