PDO::cubrid_schema

Get the requested schema information

&reftitle.description; public `array` `PDO::cubrid_schema` `int` `schema_type` `string` `table_name` `string` `col_name`

This function is used to get the requested schema information from database. You have to designate `table_name`, if you want to get information on certain table, `col_name`, if you want to get information on certain column (can be used only with PDO::CUBRID_SCH_COL_PRIVILEGE).

The result of this function is returned as a two-dimensional array (column (associative array) * row (numeric array)). The following tables shows types of schema and the column structure of the result array to be returned based on the schema type.

## Result Composition of Each Type

Schema | Column Number | Column Name | Value
PDO::CUBRID_SCH_TABLE | 1 | NAME |
| 2 | TYPE | 0:system table 1:view 2:table
PDO::CUBRID_SCH_VIEW | 1 | NAME |
| 2 | TYPE | 1:view
PDO::CUBRID_SCH_QUERY_SPEC | 1 | QUERY_SPEC |
PDO::CUBRID_SCH_ATTRIBUTE / PDO::CUBRID_SCH_TABLE_ATTRIBUTE | 1 | ATTR_NAME |
| 2 | DOMAIN |
| 3 | SCALE |
| 4 | PRECISION |
| 5 | INDEXED | 1:indexed
| 6 | NOT NULL | 1:not null
| 7 | SHARED | 1:shared
| 8 | UNIQUE | 1:unique
| 9 | DEFAULT |
| 10 | ATTR_ORDER | base:1
| 11 | CLASS_NAME |
| 12 | SOURCE_CLASS |
| 13 | IS_KEY | 1:key
PDO::CUBRID_SCH_METHOD / PDO::CUBRID_SCH_TABLE_METHOD | 1 | NAME |
| 2 | RET_DOMAIN |
| 3 | ARG_DOMAIN |
PDO::CUBRID_SCH_METHOD_FILE | 1 | METHOD_FILE |
PDO::CUBRID_SCH_SUPER_TABLE / PDO::CUBRID_SCH_DIRECT_SUPER_TABLE / PDO::CUBRID_SCH_SUB_TABLE | 1 | CLASS_NAME |
| 2 | TYPE | 0:system table 1:view 2:table
PDO::CUBRID_SCH_CONSTRAINT | 1 | TYPE | 0:unique 1:index 2:reverse unique 3:reverse index
| 2 | NAME |
| 3 | ATTR_NAME |
| 4 | NUM_PAGES |
| 5 | NUM_KEYS |
| 6 | PRIMARY_KEY | 1:primary key
| 7 | KEY_ORDER | base:1
PDO::CUBRID_SCH_TRIGGER | 1 | NAME |
| 2 | STATUS |
| 3 | EVENT |
| 4 | TARGET_CLASS |
| 5 | TARGET_ATTR |
| 6 | ACTION_TIME |
| 7 | ACTION |
| 8 | PRIORITY |
| 9 | CONDITION_TIME |
| 10 | CONDITION |
PDO::CUBRID_SCH_TABLE_PRIVILEGE / PDO::CUBRID_SCH_COL_PRIVILEGE | 1 | CLASS_NAME / ATTR_NAME |
| 2 | PRIVILEGE |
| 3 | GRANTABLE |
PDO::CUBRID_SCH_PRIMARY_KEY | 1 | CLASS_NAME |
| 2 | ATTR_NAME |
| 3 | KEY_SEQ | base:1
| 4 | KEY_NAME |
PDO::CUBRID_SCH_IMPORTED_KEYS / PDO::CUBRID_SCH_EXPORTED_KEYS / PDO::CUBRID_SCH_CROSS_REFERENCE | 1 | PKTABLE_NAME |
| 2 | PKCOLUMN_NAME |
| 3 | FKTABLE_NAME | base:1
| 4 | FKCOLUMN_NAME |
| 5 | KEY_SEQ | base:1
| 6 | UPDATE_ACTION | 0:cascade 1:restrict 2:no action 3:set null
| 7 | DELETE_ACTION | 0:cascade 1:restrict 2:no action 3:set null
| 8 | FK_NAME |
| 9 | PK_NAME |

&reftitle.parameters;

`schema_type`

- Schema type that you want to know.

`table_name`

- Table you want to know the schema of.

`col_name`

- Column you want to know the schema of.

&reftitle.returnvalues;

Array containing the schema information, when process is successful;

FALSE, when process is unsuccessful

&reftitle.examples;

### A `PDO::cubrid_schema` example

This example shows how to get primary key and foreign keys of table game.

    <?php
    $pk_list = $dbh->cubrid_schema(PDO::CUBRID_SCH_PRIMARY_KEY, "game");
    print_r($pk_list);

    $fk_list = $dbh->cubrid_schema(PDO::CUBRID_SCH_IMPORTED_KEYS, "game");
    print_r($fk_list);
    ?>

&example.outputs;

    Result:
    Array
    (
        [0] => Array
            (
                [CLASS_NAME] => game
                [ATTR_NAME] => athlete_code
                [KEY_SEQ] => 3
                [KEY_NAME] => pk_game_host_year_event_code_athlete_code
            )

        [1] => Array
            (
                [CLASS_NAME] => game
                [ATTR_NAME] => event_code
                [KEY_SEQ] => 2
                [KEY_NAME] => pk_game_host_year_event_code_athlete_code
            )

        [2] => Array
            (
                [CLASS_NAME] => game
                [ATTR_NAME] => host_year
                [KEY_SEQ] => 1
                [KEY_NAME] => pk_game_host_year_event_code_athlete_code
            )

    )
    Array
    (
        [0] => Array
            (
                [PKTABLE_NAME] => athlete
                [PKCOLUMN_NAME] => code
                [FKTABLE_NAME] => game
                [FKCOLUMN_NAME] => athlete_code
                [KEY_SEQ] => 1
                [UPDATE_RULE] => 1
                [DELETE_RULE] => 1
                [FK_NAME] => fk_game_athlete_code
                [PK_NAME] => pk_athlete_code
            )

        [1] => Array
            (
                [PKTABLE_NAME] => event
                [PKCOLUMN_NAME] => code
                [FKTABLE_NAME] => game
                [FKCOLUMN_NAME] => event_code
                [KEY_SEQ] => 1
                [UPDATE_RULE] => 1
                [DELETE_RULE] => 1
                [FK_NAME] => fk_game_event_code
                [PK_NAME] => pk_event_code
            )

    )