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Developer Documentation
- Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
- Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
- PHP version: minimum PHP 7.3.0 Note: minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is supported too.
/lib/dml/ -> pdo_moodle_database.php (source)
Differences Between: [Versions 310 and 311] [Versions 311 and 401] [Versions 311 and 402] [Versions 311 and 403] [Versions 39 and 311]
Experimental pdo database class
| Copyright: | 2008 Andrei Bautu |
| License: | http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
| File Size: | 626 lines (22 kb) |
| Included or required: | 1 time |
| Referenced: | 0 times |
| Includes or requires: | 2 files lib/dml/moodle_database.php lib/dml/pdo_moodle_recordset.php |
Defines 1 class
pdo_moodle_database:: (31 methods):
__construct()
connect()
get_pdooptions()
configure_dbconnection()
get_dblibrary()
get_name()
get_configuration_help()
get_server_info()
allowed_param_types()
get_last_error()
debug_query()
change_database_structure()
delete_records_select()
create_recordset()
execute()
get_recordset_sql()
get_fieldset_sql()
get_records_sql()
insert_record_raw()
insert_record()
update_record_raw()
update_record()
set_field_select()
sql_concat()
sql_concat_join()
sql_group_concat()
begin_transaction()
commit_transaction()
rollback_transaction()
import_record()
query_start()
Class: pdo_moodle_database - X-Ref
Experimental pdo database class| __construct($external=false) X-Ref |
| Constructor - instantiates the database, specifying if it's external (connect to other systems) or no (Moodle DB) note this has effect to decide if prefix checks must be performed or no param: bool true means external database used |
| connect($dbhost, $dbuser, $dbpass, $dbname, $prefix, array $dboptions=null) X-Ref |
| Connect to db Must be called before other methods. param: string $dbhost The database host. param: string $dbuser The database username. param: string $dbpass The database username's password. param: string $dbname The name of the database being connected to. param: mixed $prefix string means moodle db prefix, false used for external databases where prefix not used param: array $dboptions driver specific options return: bool success |
| get_pdooptions() X-Ref |
| Returns the driver-dependent connection attributes for PDO based on members stored by connect. Must be called after $dbname, $dbhost, etc. members have been set. return: array A key=>value array of PDO driver-specific connection options |
| configure_dbconnection() X-Ref |
| No description |
| get_dblibrary() X-Ref |
| Returns general database library name Note: can be used before connect() return: string db type pdo, native |
| get_name() X-Ref |
| Returns localised database type name Note: can be used before connect() return: string |
| get_configuration_help() X-Ref |
| Returns localised database configuration help. Note: can be used before connect() return: string |
| get_server_info() X-Ref |
| Returns database server info array return: array Array containing 'description' and 'version' info |
| allowed_param_types() X-Ref |
| Returns supported query parameter types return: int bitmask of accepted SQL_PARAMS_* |
| get_last_error() X-Ref |
| Returns last error reported by database engine. return: string error message |
| debug_query($sql, $params = null) X-Ref |
| Function to print/save/ignore debugging messages related to SQL queries. |
| change_database_structure($sql, $tablenames = null) X-Ref |
| Do NOT use in code, to be used by database_manager only! param: string|array $sql query param: array|null $tablenames an array of xmldb table names affected by this request. return: bool true |
| delete_records_select($table, $select, array $params=null) X-Ref |
| No description |
| create_recordset($sth) X-Ref |
| Factory method that creates a recordset for return by a query. The generic pdo_moodle_recordset class should fit most cases, but pdo_moodle_database subclasses can override this method to return a subclass of pdo_moodle_recordset. param: object $sth instance of PDOStatement return: object instance of pdo_moodle_recordset |
| execute($sql, array $params=null) X-Ref |
| Execute general sql query. Should be used only when no other method suitable. Do NOT use this to make changes in db structure, use database_manager methods instead! param: string $sql query param: array $params query parameters return: bool success |
| get_recordset_sql($sql, array $params=null, $limitfrom=0, $limitnum=0) X-Ref |
| Get a number of records as an moodle_recordset. $sql must be a complete SQL query. Since this method is a little less readable, use of it should be restricted to code where it's possible there might be large datasets being returned. For known small datasets use get_records_sql - it leads to simpler code. The return type is like: param: string $sql the SQL select query to execute. param: array $params array of sql parameters param: int $limitfrom return a subset of records, starting at this point (optional, required if $limitnum is set). param: int $limitnum return a subset comprising this many records (optional, required if $limitfrom is set). return: moodle_recordset instance |
| get_fieldset_sql($sql, array $params=null) X-Ref |
| Selects rows and return values of first column as array. param: string $sql The SQL query param: array $params array of sql parameters return: array of values |
| get_records_sql($sql, array $params=null, $limitfrom=0, $limitnum=0) X-Ref |
| Get a number of records as an array of objects. Return value is like: param: string $sql the SQL select query to execute. The first column of this SELECT statement param: array $params array of sql parameters param: int $limitfrom return a subset of records, starting at this point (optional, required if $limitnum is set). param: int $limitnum return a subset comprising this many records (optional, required if $limitfrom is set). return: array of objects, or empty array if no records were found, or false if an error occurred. |
| insert_record_raw($table, $params, $returnid=true, $bulk=false, $customsequence=false) X-Ref |
| Insert new record into database, as fast as possible, no safety checks, lobs not supported. param: string $table name param: mixed $params data record as object or array param: bool $returnit return it of inserted record param: bool $bulk true means repeated inserts expected param: bool $customsequence true if 'id' included in $params, disables $returnid return: bool|int true or new id |
| insert_record($table, $dataobject, $returnid=true, $bulk=false) X-Ref |
| Insert a record into a table and return the "id" field if required, Some conversions and safety checks are carried out. Lobs are supported. If the return ID isn't required, then this just reports success as true/false. $data is an object containing needed data param: string $table The database table to be inserted into param: object|array $dataobject A data object with values for one or more fields in the record param: bool $returnid Should the id of the newly created record entry be returned? If this option is not requested then true/false is returned. param: bool $bulk true means repeated inserts expected return: bool|int true or new id |
| update_record_raw($table, $params, $bulk=false) X-Ref |
| Update record in database, as fast as possible, no safety checks, lobs not supported. param: string $table name param: mixed $params data record as object or array param: bool true means repeated updates expected return: bool success |
| update_record($table, $dataobject, $bulk=false) X-Ref |
| Update a record in a table $dataobject is an object containing needed data Relies on $dataobject having a variable "id" to specify the record to update param: string $table The database table to be checked against. param: object $dataobject An object with contents equal to fieldname=>fieldvalue. Must have an entry for 'id' to map to the table specified. param: bool true means repeated updates expected return: bool success |
| set_field_select($table, $newfield, $newvalue, $select, array $params=null) X-Ref |
| Set a single field in every table row where the select statement evaluates to true. param: string $table The database table to be checked against. param: string $newfield the field to set. param: string $newvalue the value to set the field to. param: string $select A fragment of SQL to be used in a where clause in the SQL call. param: array $params array of sql parameters return: bool success |
| sql_concat() X-Ref |
| No description |
| sql_concat_join($separator="' '", $elements=array() X-Ref |
| No description |
| sql_group_concat(string $field, string $separator = ', ', string $sort = '') X-Ref |
| Return SQL for performing group concatenation on given field/expression param: string $field param: string $separator param: string $sort return: string |
| begin_transaction() X-Ref |
| No description |
| commit_transaction() X-Ref |
| No description |
| rollback_transaction() X-Ref |
| No description |
| import_record($table, $dataobject) X-Ref |
| Import a record into a table, id field is required. Basic safety checks only. Lobs are supported. param: string $table name of database table to be inserted into param: mixed $dataobject object or array with fields in the record return: bool success |
| query_start($sql, ?array $params, $type, $extrainfo=null) X-Ref |
| Called before each db query. Overridden to ensure $this->lastErorr is reset each query param: string $sql param: array|null $params An array of parameters. param: int $type type of query param: mixed $extrainfo driver specific extra information return: void |
