oracle - 如何从 PL/SQL 中的表列表中查找空表？

Question

我有一个表格列表，例如 table1、table2、....table35。我需要找到空的。有没有更快的方法来做到这一点？我用谷歌搜索了一些，但所有解决方案都是关于在模式中查找空表的。这次我有一个表名列表，想找空表。有什么建议吗？

Answer 1

从 DBA_OBJECTS 获取所有表并循环:

DECLARE
    v_cnt          NUMBER;
    v_schemaname   VARCHAR(20) := 'myschema';
BEGIN
    FOR i IN (SELECT DISTINCT OWNER, OBJECT_NAME
                FROM DBA_OBJECTS
               WHERE OBJECT_TYPE = 'TABLE' AND OWNER = v_schemaname)
    LOOP
        BEGIN
            EXECUTE IMMEDIATE
                'select count(*) FROM ' || i.owner || '.' || i.object_name || ' WHERE rownum = 1'
                INTO v_cnt;

            IF v_cnt = 0
            THEN
                DBMS_OUTPUT.put_line (
                    i.owner || '.' || i.object_name || ' IS EMPTY');
            END IF;
        EXCEPTION
            WHEN OTHERS
            THEN
                DBMS_OUTPUT.put_line (
                    i.owner || '.' || i.object_name || ' ERROR: ' || SQLCODE);
        END;
    END LOOP;
END;