API:EPrints/Database/Oracle

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NAME

EPrints::Database::Oracle - custom database methods for Oracle DB

DESCRIPTION

Oracle database wrapper.

Oracle-specific Annoyances

Oracle will uppercase any identifiers that aren't quoted and is case sensitive, hence mixing quoted and unquoted identifiers will lead to problems.

Oracle does not support LIMIT().

Oracle does not support AUTO_INCREMENT (MySQL) nor SERIAL (Postgres).

Oracle won't ORDER BY LOBS.

METHODS

get_server_version

 $version = $db->get_server_version

Return the database server version.

get_column_type

 $real_type = $db->get_column_type( NAME, TYPE, NOT_NULL, [, LENGTH ] )

Returns a column definition for NAME of type TYPE. If NOT_NULL is true the column will be created NOT NULL. For column types that require a length use LENGTH.

TYPE is the SQL type. The types are constants defined by this module, to import them use:

 use EPrints::Database qw( :sql_types );
 

Supported types (n = requires LENGTH argument):

Character data: SQL_VARCHAR(n), SQL_LONGVARCHAR.

Binary data: SQL_VARBINARY(n), SQL_LONGVARBINARY.

Integer data: SQL_TINYINT, SQL_SMALLINT, SQL_INTEGER.

Floating-point data: SQL_REAL, SQL_DOUBLE.

Time data: SQL_DATE, SQL_TIME.

get_tables

 @tables = $db->get_tables

Return a list of all the tables in the database.

has_sequence

 $boolean = $db->has_sequence( $name )

Return true if a sequence 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.

UNDOCUMENTED METHODS

These methods were found in the source code but didn't have any POD associated with them. This may be because we haven't got around to documenting them yet or it could be because they are internal to the API and not intended for use by other parts of EPrints.