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

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==NAME==
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'''EPrints::Database::mysql''' - custom database methods for MySQL DB
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==DESCRIPTION==
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MySQL database wrapper.
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===MySQL-specific Annoyances===
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MySQL does not support sequences.
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MySQL is (by default) lax about truncation.
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==METHODS==
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===get_server_version===
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$version = $db-&gt;get_server_version
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Return the database server version.
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===create_counters===
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$n = $db-&gt;create_counters()
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Create and initialise the counters.
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===has_table===
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$boolean = $db-&gt;has_table( $tablename )
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Return true if the a table of the given name exists in the database.
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===has_column===
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$boolean = $db-&gt;has_column( $tablename, $columnname )
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Return true if the a table of the given name has a column named $columnname in the database.
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===has_counter===
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$success = $db-&gt;has_counter( $counter )
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Returns true if $counter exists.
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===counter_next===
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$n = $db-&gt;counter_next( $counter )
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Return the next unused value for the named counter. Returns undef if  the counter doesn't exist.
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===counter_minimum===
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$db-&gt;counter_minimum( $counter, $value )
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Ensure that the counter is set no lower that $value. This is used when importing eprints which may not be in scrict sequence.
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===counter_reset===
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$db-&gt;counter_reset( $counter )
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Return the counter. Use with cautiuon.
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Revision as of 13:26, 25 February 2010

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 (3.4, 3.3) | Revision Log | Before editing this page please read Pod2Wiki


NAME

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

User Comments


DESCRIPTION

MySQL database wrapper.

User Comments


MySQL-specific Annoyances

MySQL does not support sequences.

MySQL is (by default) lax about truncation.

User Comments


METHODS

User Comments


get_server_version

$version = $db->get_server_version

Return the database server version.

User Comments


create_counters

$n = $db->create_counters()

Create and initialise the counters.

User Comments


has_table

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

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

User Comments


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.

User Comments


has_counter

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

Returns true if $counter exists.

User Comments


counter_next

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

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

User Comments


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.

User Comments


counter_reset

$db->counter_reset( $counter )

Return the counter. Use with cautiuon.

User Comments


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