Get the requested schema information

说明

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

参数

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.

返回值

Array containing the schema information, when process is successful;

FALSE, when process is unsuccessful

范例

Example #1 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);
?>

以上例程会输出：

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
        )

)