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您在創建數據遷移或數據同步任務時，指定需要遷移或同步的對象后，數據傳輸會自動過濾不支持的表，可能會導致識別出的表數量和實際需要遷移或同步的表數量不一致，您可以通過本文的 SQL 語句進行查詢。

查詢表的基本信息

不同數據源類型查詢表基本信息的 SQL 語句如下。

MySQL 數據源

SELECT
    NULL TABLE_CATALOG,
    TABLE_SCHEMA,
    TABLE_NAME,
    TABLE_ROWS,
    TABLE_COLLATION,
    ENGINE
    FROM
    information_schema.tables
    WHERE
    TABLE_TYPE = 'BASE TABLE'
    AND TABLE_SCHEMA NOT IN(
        'mysql',
        'information_schema',
        'performance_schema'
    )
    AND TABLE_SCHEMA IN ()
    AND TABLE_NAME IN ();

OceanBase 數據庫 MySQL 租戶數據源

SELECT
    /*+ query_timeout(600000000)*/
    NULL TABLE_CATALOG,
    TABLE_SCHEMA,
    TABLE_NAME,
    TABLE_ROWS,
    TABLE_COLLATION,
    ENGINE
    FROM
    information_schema.tables
    WHERE
    TABLE_TYPE = 'BASE TABLE'
    AND TABLE_SCHEMA NOT IN(
        'mysql',
        'information_schema',
        'performance_schema'
    )
    AND BINARY TABLE_SCHEMA IN ()
    AND BINARY TABLE_NAME IN ();

OceanBase 數據庫 Oracle 租戶數據源

SELECT
    /*+ query_timeout(600000000)*/
    NULL,
    A.OWNER,
    A.TABLE_NAME,
    A.NUM_ROWS,
    A.PARTITIONED,
    A.IOT_TYPE
FROM
    ALL_TABLES A
WHERE
    A.TABLE_NAME IN (
        SELECT
            OBJECT_NAME
        FROM
            ALL_OBJECTS
        WHERE
            UPPER(OBJECT_TYPE) = 'TABLE'
    )
    AND A.OWNER NOT IN ('SYSTEM', 'SYS')
    AND A.TEMPORARY = 'N'
    AND A.OWNER IN ()
    AND A.TABLE_NAME IN ();

Oracle 數據源

SELECT
    NULL,
    A.OWNER,
    A.TABLE_NAME,
    A.NUM_ROWS,
    A.PARTITIONED,
    A.IOT_TYPE
FROM
    ALL_TABLES A
WHERE
    (A.OWNER, A.TABLE_NAME) NOT IN (
        SELECT
            OWNER,
            MVIEW_NAME
        FROM
            ALL_MVIEWS
        UNION
        ALL
        SELECT
            LOG_OWNER,
            LOG_TABLE
        FROM
            ALL_MVIEW_LOGS
    )
    AND A.OWNER NOT IN ('SYSTEM', 'SYS')
    AND A.TEMPORARY = 'N'
    AND A.OWNER IN ()
    AND A.TABLE_NAME IN ();

PostgreSQL 數據源

SELECT
    TABLE_CATALOG,
    TABLE_SCHEMA,
    TABLE_NAME
    FROM
    information_schema.tables
    WHERE
    TABLE_TYPE = 'BASE TABLE'
    AND TABLE_SCHEMA <> 'pg_catalog'
    AND TABLE_SCHEMA <> 'information_schema'
    AND TABLE_SCHEMA IN ()
    AND TABLE_NAME IN ();

過濾外表

數據傳輸會默認過濾掉外表的遷移/同步，不同數據源類型過濾外表的 SQL 語句如下。

Oracle 數據源

SELECT NULL,A.OWNER,A.TABLE_NAME,A.NUM_ROWS,A.PARTITIONED,A.IOT_TYPE
        FROM ALL_TABLES A
        WHERE (A.OWNER,A.TABLE_NAME) NOT IN ( SELECT OWNER,MVIEW_NAME FROM ALL_MVIEWS UNION ALL SELECT LOG_OWNER,LOG_TABLE FROM ALL_MVIEW_LOGS)
        AND A.OWNER NOT IN ('SYSTEM','SYS') AND A.TEMPORARY='N' AND A.EXTERNAL != 'YES'
        %s

OceanBase 數據庫 Oracle 租戶

SELECT /*HINT*/ NULL,A.OWNER,A.TABLE_NAME,A.NUM_ROWS,A.PARTITIONED,A.IOT_TYPE FROM ALL_TABLES A
        WHERE A.TABLE_NAME IN (
        SELECT OBJECT_NAME FROM ALL_OBJECTS WHERE UPPER(OBJECT_TYPE)='TABLE'
        ) AND A.OWNER NOT IN ('SYSTEM','SYS') AND A.TEMPORARY='N' AND A.EXTERNAL != 'YES'
        %s

查詢視圖

不同數據源類型查詢視圖的 SQL 語句如下。

MySQL 數據源

SELECT
    TABLE_NAME,
    TABLE_SCHEMA,
    VIEW_DEFINITION
    FROM
    information_schema.views
    WHERE
    TABLE_SCHEMA IN ();

OceanBase 數據庫 MySQL 租戶數據源

SELECT
    TABLE_NAME,
    TABLE_SCHEMA,
    VIEW_DEFINITION
FROM
    information_schema.views
WHERE
    TABLE_SCHEMA IN ();

OceanBase 數據庫 Oracle 租戶數據源

SELECT
    VIEW_NAME,
    OWNER
FROM
    ALL_VIEWS
WHERE
    OWNER IN ()
ORDER BY
    VIEW_NAME;

Oracle 數據源

SELECT
    VIEW_NAME,
    OWNER
FROM
    ALL_VIEWS
WHERE
    OWNER IN ()
ORDER BY
    VIEW_NAME;

查詢物化視圖

Oracle 數據源查詢物化視圖的 SQL 語句如下。

SELECT
    MVIEW_NAME AS NAME,
    OWNER
FROM
    ALL_MVIEWS
WHERE
    OWNER IN ()
UNION
SELECT
    LOG_TABLE AS NAME,
    LOG_OWNER
FROM
    ALL_MVIEW_LOGS
WHERE
    LOG_OWNER IN ();

查詢有主鍵的表

不同數據源類型查詢有主鍵的表的 SQL 語句如下。

MySQL 數據源

SELECT
    DISTINCT TABLE_NAME,
    TABLE_SCHEMA
FROM
    information_schema.statistics
WHERE
    TABLE_SCHEMA IN ()
    AND upper(INDEX_NAME) = 'PRIMARY';

OceanBase 數據源 MySQL 租戶

SELECT
    DISTINCT TABLE_NAME,
    TABLE_SCHEMA
FROM
    information_schema.statistics
WHERE
    TABLE_SCHEMA IN ()
    AND upper(INDEX_NAME) = 'PRIMARY';

Oracle 數據源

SELECT
    TABLE_NAME,
    OWNER
FROM
    ALL_CONSTRAINTS
WHERE
    OWNER IN ()
    AND STATUS = 'ENABLED'
    AND VALIDATED = 'VALIDATED'
    AND CONSTRAINT_TYPE = 'P';

查詢有主鍵或非空唯一鍵的表

不同數據源類型查詢有主鍵或非空唯一鍵的表的 SQL 語句如下。

MySQL 數據源

SELECT
    DISTINCT TABLE_NAME,
    TABLE_SCHEMA
FROM
    information_schema.statistics
WHERE
    TABLE_SCHEMA IN ()
GROUP BY
    TABLE_SCHEMA,
    TABLE_NAME,
    INDEX_NAME
HAVING
    count(*) = count(
        IF(
            upper(nullable) != 'YES'
            AND NON_UNIQUE = 0,
            1,
            NULL
        )
    );

OceanBase 數據庫 MySQL 租戶數據源

SELECT
    DISTINCT TABLE_NAME,
    TABLE_SCHEMA
FROM
    information_schema.statistics
WHERE
    TABLE_SCHEMA IN ()
GROUP BY
    TABLE_SCHEMA,
    TABLE_NAME,
    INDEX_NAME
HAVING
    count(*) = count(
        IF(
            upper(nullable) != 'YES'
            and NON_UNIQUE = 0,
            1,
            NULL
        )
    );

Oracle 數據源

SELECT
    TABLE_NAME,
    OWNER
FROM
    ALL_CONSTRAINTS
WHERE
    OWNER IN ()
    AND STATUS = 'ENABLED'
    AND VALIDATED = 'VALIDATED'
    AND CONSTRAINT_TYPE = 'P';

OceanBase 數據庫 Oracle 租戶數據源

SELECT
    /*+ query_timeout(600000000)*/
    DISTINCT TABLE_NAME,
    OWNER
FROM
    (
        SELECT
            DC.OWNER,
            DC.TABLE_NAME,
            DC.CONSTRAINT_NAME
        FROM
            ALL_CONS_COLUMNS DCC
            JOIN ALL_CONSTRAINTS DC ON DCC.CONSTRAINT_NAME = DC.CONSTRAINT_NAME
            AND DCC.OWNER = DC.OWNER
            JOIN ALL_TAB_COLUMNS DTC ON DCC.COLUMN_NAME = DTC.COLUMN_NAME
            AND DCC.OWNER = DTC.OWNER
            AND DCC.TABLE_NAME = DTC.TABLE_NAME
        WHERE
            DCC.OWNER IN ()
            AND DC.CONSTRAINT_TYPE IN ('U', 'P')
        GROUP BY
            DC.OWNER,
            DC.TABLE_NAME,
            DC.CONSTRAINT_NAME
        HAVING
            COUNT(*) = COUNT(
                CASE
                    DTC.NULLABLE
                    WHEN 'Y' THEN NULL
                    ELSE 1
                END
            )
        MINUS
        SELECT
            TABLE_OWNER,
            TABLE_NAME,
            INDEX_NAME
        FROM
            ALL_IND_EXPRESSIONS
        WHERE
            TABLE_OWNER IN ()
    );

查詢有 UNIQUE 函數索引的表

不同數據源類型查詢有 UNIQUE 函數索引的表的 SQL 語句如下。

Oracle 數據源

SELECT
    DISTINCT A.TABLE_NAME,
    A.TABLE_OWNER
FROM
    ALL_IND_EXPRESSIONS A
    JOIN ALL_INDEXES B ON A.TABLE_OWNER = B.TABLE_OWNER
    AND A.TABLE_NAME = B.TABLE_NAME
    AND A.INDEX_NAME = B.INDEX_NAME
WHERE
    A.TABLE_OWNER IN ()
    AND B.UNIQUENESS = 'UNIQUE';

OceanBase 數據庫 Oracle 租戶數據源

SELECT
    /*+ query_timeout(600000000)*/
    DISTINCT A.TABLE_NAME,
    A.TABLE_OWNER
FROM
    ALL_IND_EXPRESSIONS A
    JOIN ALL_INDEXES B ON A.TABLE_OWNER = B.TABLE_OWNER
    AND A.TABLE_NAME = B.TABLE_NAME
    AND A.INDEX_NAME = B.INDEX_NAME
WHERE
    A.TABLE_OWNER IN ()
    AND B.UNIQUENESS = 'UNIQUE';

查詢是否存在某些數據類型的表

不同數據源查詢是否存在某些數據類型的表的 SQL 語句如下。

Oracle 數據源

SELECT
    DISTINCT TABLE_NAME AS TABLENAME,
    OWNER AS DBNAME
FROM
    all_tab_columns
WHERE
    OWNER IN ()
    AND DATA_TYPE IN / NOT IN ();

MySQL 數據源

SELECT
    DISTINCT TABLE_NAME AS TABLENAME,
    TABLE_SCHEMA
FROM
    information_schema.COLUMNS
WHERE
    TABLE_SCHEMA IN ()
    AND DATA_TYPE IN / NOT IN ();

查詢有主鍵且包含某些數據類型的表

不同數據源類型查詢有主鍵且包含某些數據類型的表的 SQL 語句如下。

OceanBase 數據庫 MySQL 租戶數據源

SELECT
    DISTINCT TABLE_NAME,
    TABLE_SCHEMA
FROM
    information_schema.COLUMNS
WHERE
    UPPER(COLUMN_KEY) = 'PRI'
    AND TABLE_SCHEMA IN ()
    AND UPPER(COLUMN_TYPE) IN ();

MySQL 數據源

SELECT
    DISTINCT TABLE_NAME,
    TABLE_SCHEMA
FROM
    information_schema.COLUMNS
WHERE
    UPPER(COLUMN_KEY) = 'PRI'
    AND TABLE_SCHEMA IN ()
    AND UPPER(COLUMN_TYPE) IN ();

查詢包含 LOB 類型的表

不同數據源類型查詢包含 LOB 類型的表的 SQL 語句如下。

Oracle 數據源

SELECT
    DISTINCT TABLE_NAME,
    OWNER
FROM
    ALL_LOBS
WHERE
    OWNER IN ();

OceanBase 數據庫 Oracle 租戶數據源

SELECT
    /*+ query_timeout(600000000)*/
    DISTINCT TABLE_NAME,
    OWNER
FROM
    ALL_TAB_COLUMNS
WHERE
    DATA_TYPE IN ('BLOB', 'CLOB')
    AND OWNER IN ();

查詢 Oracle 數據庫中 row_movement 為 DISABLED 的表

SELECT
    TABLE_NAME,
    OWNER
FROM
    ALL_TABLES
WHERE
    OWNER IN ()
    AND ROW_MOVEMENT = 'DISABLED';

查詢 OceanBase 數據庫中包含 pseudo 列的表

OceanBase 數據庫 MySQL 租戶

SELECT
    DISTINCT TABLE_NAME,
    TABLE_SCHEMA
FROM
    information_schema.columns
WHERE
    TABLE_SCHEMA IN ()
    AND COLUMN_NAME in (
        'OMS_PK_INCRMT',
        'OMS_OBJECT_NUMBER',
        'OMS_RELATIVE_FNO',
        'OMS_BLOCK_NUMBER',
        'OMS_ROW_NUMBER'
    );

OceanBase 數據庫 Oracle 租戶

SELECT
    DISTINCT TABLE_NAME,
    OWNER
FROM
    ALL_TAB_COLUMNS
WHERE
    OWNER IN ()
    AND COLUMN_NAME IN (
        'OMS_PK_INCRMT',
        'OMS_OBJECT_NUMBER',
        'OMS_RELATIVE_FNO',
        'OMS_BLOCK_NUMBER',
        'OMS_ROW_NUMBER'
    );

查詢列數量超過指定值的表

不同數據源類型查詢列數量超過指定值的表的 SQL 語句如下。

Oracle 數據源

SELECT
    TABLE_NAME,
    OWNER
FROM
    ALL_TAB_COLUMNS
WHERE
    OWNER = ?
GROUP BY
    TABLE_NAME,
    OWNER
HAVING COUNT(1) > ?;

OceanBase 數據庫 Oracle 租戶數據源

SELECT
    /*+ query_timeout(600000000)*/
    TABLE_NAME,
    OWNER
FROM
    ALL_TAB_COLUMNS
WHERE
    OWNER = ?
GROUP BY
    TABLE_NAME,
    OWNER
HAVING COUNT(1) > ?;

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查詢表對象 SQL

查詢表的基本信息

過濾外表

查詢視圖

查詢物化視圖

查詢有主鍵的表

查詢有主鍵或非空唯一鍵的表

查詢有 UNIQUE 函數索引的表

查詢是否存在某些數據類型的表

查詢有主鍵且包含某些數據類型的表

查詢包含 LOB 類型的表

查詢 Oracle 數據庫中 row_movement 為 DISABLED 的表

查詢 OceanBase 數據庫中包含 pseudo 列的表

查詢列數量超過指定值的表