我正在尝试在用于创建materialisd视图的脚本中搜索关键字
CUSTOMERQUERYall_mviewsSELECT *
FROM ALL_MVIEWS
WHERE UPPER(QUERY) LIKE '%CUSTOMER%';
应该可以。但是，因为查询不是 CHAR 数据类型，所以我无法执行此操作。我尝试过使用
TO_CHAR(QUERY)DMBS_LOB.INSTR(QUERY, 'CUSTOMER')TO_LOB(QUERY)您当然可以使用纯 SQL 进行查询，但您将无法摆脱在幕后使用 PL/SQL。那是因为 LONG 只能由 PL/SQL 操作。
要实现此目的，您必须编写一个 PL/SQL 函数来包装相关字典视图（此处为
all_mviewsLONGCLOB CREATE OR REPLACE TYPE dba_mviews_rectype IS OBJECT (
CONTAINER_NAME VARCHAR2(128),
QUERY CLOB,
QUERY_LEN NUMBER,
UPDATABLE VARCHAR2(1),
UPDATE_LOG VARCHAR2(128),
MASTER_ROLLBACK_SEG VARCHAR2(128),
MASTER_LINK VARCHAR2(128),
REWRITE_ENABLED VARCHAR2(1),
REWRITE_CAPABILITY VARCHAR2(9),
REFRESH_MODE VARCHAR2(9),
REFRESH_METHOD VARCHAR2(8),
BUILD_MODE VARCHAR2(9),
FAST_REFRESHABLE VARCHAR2(18),
LAST_REFRESH_TYPE VARCHAR2(8),
LAST_REFRESH_DATE DATE,
LAST_REFRESH_END_TIME DATE,
STALENESS VARCHAR2(19),
AFTER_FAST_REFRESH VARCHAR2(19),
UNKNOWN_PREBUILT VARCHAR2(1),
UNKNOWN_PLSQL_FUNC VARCHAR2(1),
UNKNOWN_EXTERNAL_TABLE VARCHAR2(1),
UNKNOWN_CONSIDER_FRESH VARCHAR2(1),
UNKNOWN_IMPORT VARCHAR2(1),
UNKNOWN_TRUSTED_FD VARCHAR2(1),
COMPILE_STATE VARCHAR2(19),
USE_NO_INDEX VARCHAR2(1),
STALE_SINCE DATE,
NUM_PCT_TABLES NUMBER,
NUM_FRESH_PCT_REGIONS NUMBER,
NUM_STALE_PCT_REGIONS NUMBER,
SEGMENT_CREATED VARCHAR2(3),
EVALUATION_EDITION VARCHAR2(128),
UNUSABLE_BEFORE VARCHAR2(128),
UNUSABLE_BEGINNING VARCHAR2(128),
DEFAULT_COLLATION VARCHAR2(100),
ON_QUERY_COMPUTATION VARCHAR2(1)
)
/
CREATE OR REPLACE TYPE dba_mviews_tabtype IS TABLE OF dba_mviews_rectype
/
CREATE OR REPLACE FUNCTION f_dba_mviews_ext (in_owner IN varchar2, in_mview_name IN varchar2)
RETURN dba_mviews_tabtype PIPELINED
AS
var_cursor binary_integer;
var_query varchar2(4000);
res pls_integer;
tab_desc dbms_sql.desc_tab;
var_column_count pls_integer;
rec_dummy_mview dba_mviews_rectype;
var_owner dba_mviews.owner%TYPE;
var_mview_name dba_mviews.mview_name%TYPE;
BEGIN
var_query := 'SELECT *
FROM dba_mviews
WHERE owner = :owner
AND mview_name = :mview_name';
var_cursor := dbms_sql.open_cursor;
dbms_sql.parse(var_cursor,var_query,dbms_sql.native);
dbms_sql.bind_variable(var_cursor,'owner',in_owner);
dbms_sql.bind_variable(var_cursor,'mview_name',in_mview_name);
dbms_sql.define_column(var_cursor,1,var_owner,128);
dbms_sql.define_column(var_cursor,2,var_mview_name,128);
dbms_sql.define_column(var_cursor,3,rec_dummy_mview.container_name,128);
dbms_sql.define_column_long(var_cursor,4);
dbms_sql.define_column(var_cursor,5,rec_dummy_mview.query_len);
dbms_sql.define_column(var_cursor,6,rec_dummy_mview.updatable,1);
dbms_sql.define_column(var_cursor,7,rec_dummy_mview.update_log,128);
dbms_sql.define_column(var_cursor,8,rec_dummy_mview.master_rollback_seg,128);
dbms_sql.define_column(var_cursor,9,rec_dummy_mview.master_link,128);
dbms_sql.define_column(var_cursor,10,rec_dummy_mview.rewrite_enabled,1);
dbms_sql.define_column(var_cursor,11,rec_dummy_mview.rewrite_capability,9);
dbms_sql.define_column(var_cursor,12,rec_dummy_mview.refresh_mode,9);
dbms_sql.define_column(var_cursor,13,rec_dummy_mview.refresh_method,8);
dbms_sql.define_column(var_cursor,14,rec_dummy_mview.build_mode,9);
dbms_sql.define_column(var_cursor,15,rec_dummy_mview.fast_refreshable,18);
dbms_sql.define_column(var_cursor,16,rec_dummy_mview.last_refresh_type,8);
dbms_sql.define_column(var_cursor,17,rec_dummy_mview.last_refresh_date);
dbms_sql.define_column(var_cursor,18,rec_dummy_mview.last_refresh_end_time);
dbms_sql.define_column(var_cursor,19,rec_dummy_mview.staleness,19);
dbms_sql.define_column(var_cursor,20,rec_dummy_mview.after_fast_refresh,19);
dbms_sql.define_column(var_cursor,21,rec_dummy_mview.unknown_prebuilt,1);
dbms_sql.define_column(var_cursor,22,rec_dummy_mview.unknown_plsql_func,1);
dbms_sql.define_column(var_cursor,23,rec_dummy_mview.unknown_external_table,1);
dbms_sql.define_column(var_cursor,24,rec_dummy_mview.unknown_consider_fresh,1);
dbms_sql.define_column(var_cursor,25,rec_dummy_mview.unknown_import,1);
dbms_sql.define_column(var_cursor,26,rec_dummy_mview.unknown_trusted_fd,1);
dbms_sql.define_column(var_cursor,27,rec_dummy_mview.compile_state,19);
dbms_sql.define_column(var_cursor,28,rec_dummy_mview.use_no_index,1);
dbms_sql.define_column(var_cursor,29,rec_dummy_mview.stale_since);
dbms_sql.define_column(var_cursor,30,rec_dummy_mview.num_pct_tables);
dbms_sql.define_column(var_cursor,31,rec_dummy_mview.num_fresh_pct_regions);
dbms_sql.define_column(var_cursor,32,rec_dummy_mview.num_stale_pct_regions);
dbms_sql.define_column(var_cursor,33,rec_dummy_mview.segment_created,3);
dbms_sql.define_column(var_cursor,34,rec_dummy_mview.evaluation_edition,128);
dbms_sql.define_column(var_cursor,35,rec_dummy_mview.unusable_before,128);
dbms_sql.define_column(var_cursor,36,rec_dummy_mview.unusable_beginning,128);
dbms_sql.define_column(var_cursor,37,rec_dummy_mview.default_collation,100);
dbms_sql.define_column(var_cursor,38,rec_dummy_mview.on_query_computation,1);
res := dbms_sql.execute(var_cursor);
WHILE dbms_sql.fetch_rows(var_cursor) > 0
LOOP
DECLARE
var_query_clob clob;
var_offset pls_integer := 0;
var_buffer_length pls_integer := 32760;
var_value_length pls_integer := 0;
var_long_piece long;
rec_mview dba_mviews_rectype := dba_mviews_rectype(NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
BEGIN
dbms_sql.column_value(var_cursor,3,rec_mview.container_name);
dbms_lob.createtemporary(var_query_clob, false, dbms_lob.call);
LOOP
dbms_sql.column_value_long(c => var_cursor,
position => 4,
length => var_buffer_length,
offset => var_offset,
value => var_long_piece,
value_length => var_value_length);
EXIT WHEN var_value_length = 0;
dbms_lob.append(var_query_clob, var_long_piece);
var_offset := var_offset + var_value_length;
END LOOP;
rec_mview.query := var_query_clob;
dbms_sql.column_value(var_cursor,5,rec_mview.query_len);
dbms_sql.column_value(var_cursor,6,rec_mview.updatable);
dbms_sql.column_value(var_cursor,7,rec_mview.update_log);
dbms_sql.column_value(var_cursor,8,rec_mview.master_rollback_seg);
dbms_sql.column_value(var_cursor,9,rec_mview.master_link);
dbms_sql.column_value(var_cursor,10,rec_mview.rewrite_enabled);
dbms_sql.column_value(var_cursor,11,rec_mview.rewrite_capability);
dbms_sql.column_value(var_cursor,12,rec_mview.refresh_mode);
dbms_sql.column_value(var_cursor,13,rec_mview.refresh_method);
dbms_sql.column_value(var_cursor,14,rec_mview.build_mode);
dbms_sql.column_value(var_cursor,15,rec_mview.fast_refreshable);
dbms_sql.column_value(var_cursor,16,rec_mview.last_refresh_type);
dbms_sql.column_value(var_cursor,17,rec_mview.last_refresh_date);
dbms_sql.column_value(var_cursor,18,rec_mview.last_refresh_end_time);
dbms_sql.column_value(var_cursor,19,rec_mview.staleness);
dbms_sql.column_value(var_cursor,20,rec_mview.after_fast_refresh);
dbms_sql.column_value(var_cursor,21,rec_mview.unknown_prebuilt);
dbms_sql.column_value(var_cursor,22,rec_mview.unknown_plsql_func);
dbms_sql.column_value(var_cursor,23,rec_mview.unknown_external_table);
dbms_sql.column_value(var_cursor,24,rec_mview.unknown_consider_fresh);
dbms_sql.column_value(var_cursor,25,rec_mview.unknown_import);
dbms_sql.column_value(var_cursor,26,rec_mview.unknown_trusted_fd);
dbms_sql.column_value(var_cursor,27,rec_mview.compile_state);
dbms_sql.column_value(var_cursor,28,rec_mview.use_no_index);
dbms_sql.column_value(var_cursor,29,rec_mview.stale_since);
dbms_sql.column_value(var_cursor,30,rec_mview.num_pct_tables);
dbms_sql.column_value(var_cursor,31,rec_mview.num_fresh_pct_regions);
dbms_sql.column_value(var_cursor,32,rec_mview.num_stale_pct_regions);
dbms_sql.column_value(var_cursor,33,rec_mview.segment_created);
dbms_sql.column_value(var_cursor,34,rec_mview.evaluation_edition);
dbms_sql.column_value(var_cursor,35,rec_mview.unusable_before);
dbms_sql.column_value(var_cursor,36,rec_mview.unusable_beginning);
dbms_sql.column_value(var_cursor,37,rec_mview.default_collation);
dbms_sql.column_value(var_cursor,38,rec_mview.on_query_computation);
PIPE ROW(rec_mview);
END;
END LOOP;
dbms_sql.close_cursor(var_cursor);
RETURN;
EXCEPTION
WHEN OTHERS THEN
dbms_output.put_line(SQLERRM);
IF dbms_sql.is_open(var_cursor)
THEN
dbms_sql.close_cursor(var_cursor);
END IF;
RAISE;
END;
/
CREATE OR REPLACE VIEW dba_mviews_ext
AS
SELECT v.owner,
v.mview_name,
x.*
FROM dba_mviews v
CROSS APPLY TABLE(f_dba_mviews_ext(v.owner,v.mview_name)) x
ORDER BY owner,mview_name
/
CREATE OR REPLACE VIEW all_mviews_ext
AS
SELECT v.owner,
v.mview_name,
x.*
FROM all_mviews v
CROSS APPLY TABLE(f_dba_mviews_ext(v.owner,v.mview_name)) x
ORDER BY owner,mview_name
/
CREATE OR REPLACE VIEW user_mviews_ext
AS
SELECT USER owner,
v.mview_name,
x.*
FROM user_mviews v
CROSS APPLY TABLE(f_dba_mviews_ext(USER,v.mview_name)) x
ORDER BY mview_name
/
GRANT select ON DBA_MVIEWS_EXT TO select_catalog_role;
GRANT select ON ALL_MVIEWS_EXT TO public;
GRANT select ON USER_MVIEWS_EXT TO public;
CREATE PUBLIC SYNONYM DBA_MVIEWS_EXT FOR DBA_MVIEWS_EXT;
CREATE PUBLIC SYNONYM ALL_MVIEWS_EXT FOR ALL_MVIEWS_EXT;
CREATE PUBLIC SYNONYM USER_MVIEWS_EXT FOR USER_MVIEWS_EXT;
现在您可以简单地使用常规 SQL 进行查询：
SELECT *
FROM all_mviews_ext
WHERE UPPER(query) LIKE '%CUSTOMER%'
相同的技术可用于
dba_viewsLONGdba_tab_partitions/subpartitionsdba_tab_columnsdba_ind_expressionsLONGvarchar2(4000)dbms_sqlLONGLONG但是可以通过 XML 传递此数据类型并反序列化为
CLOBCLOBDBMS_XMLGENcreate view v_test as
select 'some text' as res
from dual
select
v.owner,
v.view_name,
v.text,
v.text_length
from all_views v
join xmltable(
'/ROWSET/ROW'
passing dbms_xmlgen.getxmltype('
select view_name, owner, text
from all_views
where text is not null')
columns
view_name varchar2(200),
owner varchar2(200),
text clob
) flt
on v.view_name = flt.view_name
and v.owner = flt.owner
where flt.text like '%some%text%'
| 业主 | VIEW_NAME | 文字 | TEXT_LENGTH |
|---|---|---|---|
| FIDDLE_SHCEJNRFMOROSMIQCFFB | V_测试 | 从双 选择“某些文本”作为资源 |
35 |
sys_dburigen 应该为你完成这项工作。 它需要一个 LONG 并将返回一个 CLOB
选择我的所有者 , m.mview_name , sys_dburigen( 所有者 , mview_name, 查询, 'text()').getclob() mview_query_text 来自 all_mviews m