在Oracle表中进行关键词搜索的过程

DECLARE
    p_search_text      CONSTANT VARCHAR2 (1000) := 'SAMPLE SEARCH WRITE';
    p_schema_name      CONSTANT VARCHAR2 (1000) := 'SAMPLE SCHEMA NAME'; 
    p_table_name       CONSTANT VARCHAR2 (1000) := 'SAMPLE TABLE NAME';-- NULL (If FULL will work, give the table name null)

    TYPE r_column_data IS RECORD
    (
        column_name    SYS.DBA_TAB_COLUMNS.COLUMN_NAME%TYPE
    );

    TYPE tr_column_data IS TABLE OF r_column_data
        INDEX BY PLS_INTEGER;

    ltr_column_data             tr_column_data;

    TYPE tr_table IS TABLE OF VARCHAR2 (200)
        INDEX BY PLS_INTEGER;

    l_sql                       VARCHAR2 (1000);
    l_count                     NUMBER;
    ltr_table                   tr_table;
    l_found                     NUMBER := 0;
    l_column_name               VARCHAR2 (100);
BEGIN
      SELECT table_name
        BULK COLLECT INTO ltr_table
        FROM dba_tables
       WHERE     owner = p_schema_name
             AND table_name LIKE '' || p_table_name || '' || '%'
             AND ROWNUM <= 19999
    ORDER BY 1;

    DBMS_APPLICATION_INFO.set_module ('PV_FINDER', NULL);

    FOR i IN 1 .. ltr_table.COUNT
    LOOP
        DBMS_APPLICATION_INFO.set_client_info (
            i || '/' || ltr_table.COUNT || ' -> ' || ltr_table (i));

          SELECT col.column_name
            BULK COLLECT INTO ltr_column_data
            FROM sys.dba_tab_columns col
                 INNER JOIN sys.dba_tables t
                     ON col.owner = t.owner AND col.table_name = t.table_name
           WHERE col.table_name = ltr_table (i) AND col.DATA_TYPE = 'VARCHAR2'
        ORDER BY col.column_id;

        FOR j IN 1 .. ltr_column_data.COUNT
        LOOP
            DBMS_APPLICATION_INFO.set_client_info (
                   j
                || '/'
                || ltr_column_data.COUNT
                || ' -> '
                || ltr_column_data (j).column_name);

            l_sql :=
                   'SELECT /*+ PARALLEL (A 8)*/ count(1) from '
                || p_schema_name
                || '.'
                || ltr_table (i)
                || ' A WHERE '
                || ltr_column_data (j).column_name
                || ' ='''
                || p_search_text
                || '''';

            EXECUTE IMMEDIATE l_sql INTO l_count;

            IF l_count > 0
            THEN
                IF l_found = 0
                THEN
                    DBMS_OUTPUT.put_line (
                        'Search Keyword: ' || p_search_text);
                    DBMS_OUTPUT.put_line (
                        '-------------------------------------------');
                END IF;

                DBMS_OUTPUT.put_line ('table name found : '||ltr_table (i) );
                DBMS_OUTPUT.put_line ('column name found : ' || ltr_column_data (j).column_name);
                DBMS_OUTPUT.put_line ('count : ' || l_count);
                DBMS_OUTPUT.put_line ('sql name : ' || l_sql);
                DBMS_OUTPUT.put_line ('*****');

                l_found := l_found + 1;
            END IF;
        END LOOP;
    END LOOP;

    DBMS_APPLICATION_INFO.set_module (NULL, NULL);
    DBMS_APPLICATION_INFO.set_client_info (NULL);
    DBMS_OUTPUT.put_line ('-------------------------------------------');
    DBMS_OUTPUT.put_line ('total number of tables searched : ' || ltr_table.COUNT);
    DBMS_OUTPUT.put_line ('total number of tables found : ' || l_found);
END;

/*select module,client_info from v$session where module like '%PV_FINDER%'*/

Search Keyword: SAMPLE SEARCH KEYWORD
-------------------------------------------
table name found : TABLE - 1
column name found : COLUMN NAME 
count : 4
sql name : SELECT /*+ PARALLEL (A 8)*/ count(1) from SCHEMA_NAME.TABLE-1 A WHERE TABLE-1.COLUMN ='SAMPLE SEARCH KEYWORD'
*****
table name found : TABLE - 2
column name found : COLUMN NAME 
count : 2
sql name : SELECT /*+ PARALLEL (A 8)*/ count(1) from SCHEMA_NAME.TABLE-2 A WHERE TABLE-1.COLUMN ='SAMPLE SEARCH KEYWORD'
*****
table name found : TABLE - 3
column name found : COLUMN NAME 
count : 2
sql name : SELECT /*+ PARALLEL (A 8)*/ count(1) from SCHEMA_NAME.TABLE-3 A WHERE TABLE-1.COLUMN ='SAMPLE SEARCH KEYWORD'
*****
table name found : TABLE - 4
column name found : COLUMN NAME 
count : 2
sql name : SELECT /*+ PARALLEL (A 8)*/ count(1) from SCHEMA_NAME.TABLE-4 A WHERE TABLE-1.COLUMN ='SAMPLE SEARCH KEYWORD'
*****
-------------------------------------------
total number of tables searched : 72
total number of tables found : 4