I have a oracle stored procedure, inputs is
p_processId = 5660
p_featureClassName ='future_parcels'
p_DrawnGeometry = MDSYS.SDO_GEOMETRY(2003, 2400000, null,
MDSYS.SDO_ELEM_INFO_ARRAY(1, 1003, 1, 27, 2003, 1),
MDSYS.SDO_ORDINATE_ARRAY(8439212.4589933194220066070556640625,
4540074.1191380098462104797363281250, 8439201.7998965308070182800292968750, 4540058.374383729882538318634033203125, 8439315.814959609881043434143066406250, 4540058.374466760084033012390136718750, 8439319.9868115298449993133544921875, 4540067.6362674199044704437255859375, 8439323.231370599940419197082519531250, 4540081.528450479730963706970214843750, 8439328.328618479892611503601074218750, 4540097.737373660318553447723388671875, 8439330.6458750404417514801025390625, 4540129.691041340120136737823486328125, 8439332.959363190457224845886230468750, 4540149.486472180113196372985839843750, 8439227.984901839867234230041503906250, 4540148.055711519904434680938720703125, 8439225.43722324073314666748046875, 4540138.489620880223810672760009765625, 8439223.1199580393731594085693359375, 4540118.576599569991230964660644531250, 8439220.802692830562591552734375, 4540098.663578259758651256561279296875, 8439212.4589933194220066070556640625, 4540074.1191380098462104797363281250, 8439252.6796298995614051818847656250, 4540086.660427900031208992004394531250, 8439243.2996299006044864654541015625, 4540125.440427900291979312896728515625, 8439299.99962989985942840576171875, 4540138.040427899919450283050537109375, 8439310.49962989985942840576171875, 4540098.280427900142967700958251953125, 8439252.6796298995614051818847656250, 4540086.660427900031208992004394531250))
Procedure:
CREATE OR REPLACE
PROCEDURE get_DrawnGeometries (
p_processId IN INTEGER
, p_featureClassName IN VARCHAR2
, p_DrawnGeometry IN SDO_GEOMETRY
, p_prm_val OUT VARCHAR2
)
IS
PRAGMA AUTONOMOUS_TRANSACTION;
CURSOR featClassAttributes_cur (featureClassName IN VARCHAR2) IS
SELECT
gac.id
, lower(gac.column_name) AS column_name
, gac.view_u_pk
, gac.data_type
, gas.naziv
, gat.table_name
FROM geo_atrib_columns gac
JOIN geo_atrib_tables gat ON gat.table_name = gac.table_name
JOIN geo_app_slojevi gas ON gas.naziv = gat.layer_name
WHERE gas.naziv = featureClassName
AND gat.aktivan = 1
AND gac.aktivan = 1
AND gac.view_iu_write = 1
ORDER BY gac.view_order;
vc_sql CLOB;
vc_sql2 CLOB;
vc_sql3 CLOB;
v_columns VARCHAR2(1000);
v_tableName VARCHAR2(1000);
v_whereClause VARCHAR2(1000);
v_whereClause2 VARCHAR2(1000);
v_g_col_name VARCHAR2(30);
v_tolerance VARCHAR2(20);
v_separator VARCHAR2(16) := ' || ''' || glob_var.v_strSeparator || ''' || ';
p_id INTEGER;
v_mssg VARCHAR2(500) := NULL;
BEGIN
vc_sql := 'SELECT #columns# FROM #table_name# WHERE #where_clause#';
vc_sql2 := 'SELECT #columns# FROM #table_name# WHERE #where_clause2#';
vc_sql3 := vc_sql;
FOR rt_att IN featClassAttributes_cur(p_featureClassName) LOOP
IF rt_att.data_type = 'N' THEN
v_columns := v_columns || v_separator || ' nvl(gt_util.num2CharPointSep(' || rt_att.column_name|| '), ''NULL'')';
ELSE
v_columns := v_columns || v_separator || ' nvl(to_char(' || rt_att.column_name|| '), ''NULL'')';
END IF;
IF v_tableName IS NULL THEN
v_tableName := rt_att.table_name;
END IF;
--dbms_output.put_line(v_tableName);
END LOOP;
v_columns := ltrim(v_columns, v_separator);
v_g_col_name := gt_util.get_layer_g_col(v_tableName);
v_tolerance := gt_util.num2CharPointSep(gt_util.get_layer_tollerance(v_tableName, v_g_col_name));
--v_whereClause := 'ins_id = {0} AND SDO_GEOM.RELATE(:geom, ''EQUAL+INSIDE+CONTAINS+COVEREDBY+COVERS+OVERLAPBDYINTERSECT'', ' || v_g_col_name || ', ' || v_tolerance || ') = ''EQUAL+INSIDE+CONTAINS+COVEREDBY+COVERS+OVERLAPBDYINTERSECT''';
v_whereClause := 'ins_id = {0} AND SDO_GEOM.RELATE(:geom, ''EQUAL'', ' || v_g_col_name || ', ' || v_tolerance || ') = ''EQUAL''';
v_whereClause2 := 'ins_id = {0} AND gt_util.geom_is_equal(:geom, ' || v_g_col_name || ', ' || v_tolerance || ') = ''TRUE''';
v_whereClause := replace(v_whereClause, '{0}', to_char(p_processId));
v_whereClause2 := replace(v_whereClause2, '{0}', to_char(p_processId));
vc_sql := replace(vc_sql, '#columns#', v_columns);
vc_sql := replace(vc_sql, '#table_name#', v_tableName);
vc_sql := replace(vc_sql, '#where_clause#', v_whereClause);
vc_sql2 := replace(vc_sql2, '#columns#', v_columns);
vc_sql2 := replace(vc_sql2, '#table_name#', v_tableName);
vc_sql2 := replace(vc_sql2, '#where_clause2#', v_whereClause2);
dbms_output.put_line(vc_sql);
dbms_output.put_line(vc_sql2);
BEGIN
EXECUTE IMMEDIATE vc_sql INTO p_prm_val USING p_DrawnGeometry;
EXCEPTION WHEN NO_DATA_FOUND THEN
EXECUTE IMMEDIATE vc_sql2 INTO p_prm_val USING p_DrawnGeometry;
WHEN TOO_MANY_ROWS THEN
vc_sql3 := replace(vc_sql3, '#columns#', 'id');
vc_sql3 := replace(vc_sql3, '#table_name#', v_tableName);
vc_sql3 := replace(vc_sql3, '#where_clause#', v_whereClause);
vc_sql3 := 'SELECT * FROM (' || vc_sql3 || ' ORDER BY id DESC) WHERE ROWNUM = 1';
EXECUTE IMMEDIATE vc_sql3 INTO p_id USING p_DrawnGeometry;
EXECUTE IMMEDIATE 'DELETE FROM ' || v_tableName || ' WHERE id = ' || p_id;
COMMIT;
v_mssg := 'Identical geometry already exists. Drawn geometry is deleted. If you want to delete new geometry please delete the old one first';
RAISE error_util.ep_UsrExc;
--dbms_output.put_line(vc_sql2);
END;
EXCEPTION WHEN error_util.ep_UsrExc THEN
ERROR_UTIL.log_and_raise(SQLCODE, SQLERRM, v_mssg, DBMS_UTILITY.FORMAT_ERROR_BACKTRACE);
RAISE;
END get_DrawnGeometries;
how I can check result and debug it output ?
when I can call it returned errors
Procedure execution failed ORA-06550: line 1, column 233: PLS-00382:
expression is of wrong type ORA-06550: line 1, column 213: PL/SQL:
Statement ignored
In PL/SQL Developer you can right click on procedure name, click test and start debbuging
Related
I want to create function that return a CLOB with a json content.
But first i want to print the result (see query code) to see how it looks like.
The result must be a json, that will contain the information for 1 record just, this record select query, must be created dynamically.
So I try the next query, to resolve this problem. but i get an error.
Query
declare
v_stmt VARCHAR2(1000);
l_sep varchar2(1) := chr(10);
l_tab varchar2(1) := chr(9);
up_column VARCHAR2(50);
low_column VARCHAR2(50);
cur_asc SYS_REFCURSOR;
Vcdogcur SYS_REFCURSOR;
id_ccd number;
first boolean := true;
begin
id_ccd := 174;
v_stmt := 'select ';
open cur_asc for
SELECT column_name as up_column
,lower(column_name) as low_column
FROM USER_TAB_COLUMNS
WHERE table_name = upper('my_table');
loop
FETCH cur_asc
INTO up_column, low_column;
EXIT WHEN cur_asc%NOTFOUND;
if not first then
v_stmt := v_stmt || ',';
end if;
first := false;
v_stmt := v_stmt || l_sep || l_tab ||up_column || ' as ' || low_column;
END LOOP;
--v_stmt := v_stmt || l_sep || 'from my_table' || l_sep ||'where id = ' || id_ccd || ';';
v_stmt := v_stmt || l_sep || 'from my_table' || l_sep ||'where id = ' || id_ccd;
DBMS_OUTPUT.PUT_LINE('salida: ' || v_stmt);
CLOSE cur_asc;
--v_stmt := v_stmt || l_sep || 'from my_table' || l_sep ||'where id = ' || id_ccd;
--DBMS_OUTPUT.PUT_LINE('salida: ' || v_stmt);
open Vcdogcur for v_stmt;
APEX_JSON.initialize_clob_output;
APEX_JSON.open_object;
APEX_JSON.write('my_table', Vcdogcur);
APEX_JSON.close_object;
DBMS_OUTPUT.put_line(APEX_JSON.get_clob_output);
CLOSE Vcdogcur;
end;
/
DBMS output
salida: select
CREATED as created,
CREATED_BY as created_by,
UPDATED as updated,
UPDATED_BY as updated_by,
ID as id,
TEXT as text,
PART as part,
CODE as code,
DATE as date,
PERCENTAGE as percentage
from my_table
where id = 174
{
"my_table":[
{
"CREATED":"2020-06-04T08:10:09.000000000Z"
,"CREATED_BY":"APEX_APP"
,"UPDATED":"2020-06-04T10:10:09.295632000Z"
,"UPDATED_BY":"APEX_APP"
,"ID":174
,"TEXT":"ALL"
,"PART":2770
,"CODE":2212
,"DATE":"2017-01-01T00:00:00.000000000Z"
,"PERCENTAGE":-4.98
}
]
}
Error
Informe de error -
ORA-01001: cursor no válido
ORA-06512: en línea 44
01001. 00000 - "invalid cursor"
*Cause:
*Action:
Can somebody help me to resolve this?
Best Regards
I have 3 input parameters,based on values of each input parameter i have to prepare the SQL in procedure dynamically. I am doing below way but it is failing, if the parameter value is null,then i have to exclude that from the where clause.
IN Parameters:
empid in varchar2 || empname IN varchar2 || empsal IN varchar2
SELECT
EMP_NAME
INTO
V_EMP_NAME
FROM
EMPLOYEE
WHERE
( EMP_ID = EMPID
OR ( EMP_ID IS NULL
AND EMPID IS NULL ) )
AND ( EMP_NAME = EMPNAME
OR ( EMP_NAME IS NULL
AND EMPNAME IS NULL ) )
AND ( EMP_SAL = EMPSAL
OR ( EMP_SAL IS NULL
AND EMPSAL IS NULL ) );
After updates i modified the query like below,it is compiled but giving run time errors saying that ORA-00933: SQL command not properly ended on just before EXECUTE IMMEDIATE
V_SQL :='SELECT EMP_NAME INTO V_empname FROM employee WHERE ';
BEGIN
IF(EMPID IS NOT NULL) THEN
V_SQL := V_SQL || ' emp_id='||EMPID;
END IF;
IF(EMPNAME IS NOT NULL) THEN
V_SQL := V_SQL || ' AND emp_name='||EMPNAME;
END IF;
IF(V_empsalIS NOT NULL) THEN
V_SQL := V_SQL || ' AND emp_sal='||empsal;
V_SQL := V_SQL ||' AND ACTIVE =''Y''' ;
END IF;
EXECUTE IMMEDIATE V_SQL;
EXCEPTION
WHEN NO_DATA_FOUND THEN
V_check:= '' ;
END;
Here you are another alternative:
V_SQL_WHERE := null;
V_SQL :='SELECT EMP_NAME INTO V_empname FROM employee';
BEGIN
IF(EMPID IS NOT NULL) THEN
V_SQL_WHERE := V_SQL_WHERE || ' emp_id='||EMPID;
END IF;
IF(EMPNAME IS NOT NULL) THEN
IF (V_SQL_WHERE is not null) THEN
V_SQL_WHERE := V_SQL_WHERE || ' AND ';
END IF;
V_SQL_WHERE := V_SQL_WHERE || ' emp_name='||EMPNAME;
END IF;
IF(V_empsalIS NOT NULL) THEN
IF (V_SQL_WHERE is not null) THEN
V_SQL_WHERE := V_SQL_WHERE || ' AND ';
END IF;
V_SQL_WHERE := V_SQL_WHERE || ' emp_sal=' || empsal;
V_SQL_WHERE := V_SQL_WHERE || ' AND ACTIVE =''Y''' ;
END IF;
IF (V_SQL_WHERE is not null) then
V_SQL := V_SQL || ' WHERE ' || V_SQL_WHERE;
end if;
EXECUTE IMMEDIATE V_SQL;
EXCEPTION
WHEN NO_DATA_FOUND THEN
V_check:= '' ;
END;
Something like this: (Not tested, but just an idea)
BEGIN
IF EMPID IS NOT NULL
THEN
CLAUSE1 := 'EMP_ID = EMPID';
ELSE
CLAUSE1 := '1=1';
END IF;
IF EMPNAME IS NOT NULL
THEN
CLAUSE2 := 'EMP_NAME = EMPNAME';
ELSE
CLAUSE2 := '1=1';
END IF;
IF EMPSAL IS NOT NULL
THEN
CLAUSE3 := 'EMP_SAL = EMPSAL';
ELSE
CLAUSE3 := '1=1';
END IF;
IF ( EMPSAL IS NULL
AND EMPNAME IS NULL
AND EMPID IS NOT NULL )
THEN
CLAUSE1 := '1=0';
CLAUSE2 := '1=0';
CLAUSE3 := '1=0';
END IF;
QUERY_STR :=
' SELECT EMP_NAME INTO V_EMP_NAME FROM EMPLOYEE WHERE'
|| CLAUSE1
|| ' AND '
|| CLAUSE2
|| ' AND '
|| CLAUSE3;
END;
You can create one from scratch, including if's and elses, or you can use a package called plsql-utils, the SQL_BUILDER_PKG. It does the whole work for you.
Have a look on SQL utilities
http://code.google.com/p/plsql-utils/
Eg:
declare
l_my_query sql_builder_pkg.t_query;
l_sql varchar2(32000);
begin
sql_builder_pkg.add_select (l_my_query, 'ename');
sql_builder_pkg.add_select (l_my_query, 'sal');
sql_builder_pkg.add_select (l_my_query, 'deptno');
sql_builder_pkg.add_from (l_my_query, 'emp');
sql_builder_pkg.add_where (l_my_query, 'ename = :p_ename');
sql_builder_pkg.add_where (l_my_query, 'sal > :p_sal');
l_sql := sql_builder_pkg.get_sql (l_my_query);
dbms_output.put_line (l_sql);
end;
I used it in one project and it was a good tool.
I am trying to create a CRUD matrix for my function from a source code of that function, so I created a procedure that will read a source code.
create or replace procedure test_
IS
CURSOR c_text is
SELECT USER_SOURCE.TEXT
FROM USER_SOURCE
WHERE USER_SOURCE.name='TEST_FUNCTION'
AND USER_SOURCE.type='FUNCTION';
order by line;
v_single_text varchar2(4000);
v_tmp_text varchar2(10000) := ' ';
begin
open c_text;
loop
fetch c_text into v_single_text;
exit when c_text%notfound;
v_tmp_text := v_tmp_text|| chr(10) || rtrim(v_single_text);
dbms_output.put_line(v_single_text);
end loop;
close c_text;
end test_;
And that works very good for me, I get the source code of my desired function. It's a very simple function and I use this to learn PL/SQL. Output of that procedure look's like this.
function test_funkction Return varchar2
IS
kpp_value varchar2(20);
begin
select KPP
into kpp_value
from CUSTOMER
where CUSTOMER_ID = 200713;
dbms_output.put_line (kpp_value);
Return kpp_value;
end test_function;
Now, how to parse the string I've got in the output to get a desired result, my result should be like this
==TABLE_NAME==========OPERATIONS==
CUSTOMER - R - -
==================================
Now I have managed to do it.
But it will only work with my simple function, now I want to make a procedure that will work with any function.
Source code below.
create or replace procedure test_
IS
v_string_fnc varchar2(10000) := UPPER('function test_function
Return varchar2
IS
kpp_value varchar2(20);
begin
select KPP into kpp_value from CUSTOMER where CUSTOMER_ID = 200713;
dbms_output.put_line (kpp_value);
Return kpp_value;
end test_function;');
v_check PLS_INTEGER;
CURSOR c_text is
SELECT USER_SOURCE.TEXT
FROM USER_SOURCE
WHERE USER_SOURCE.name = 'TEST_FUNCTION'
AND USER_SOURCE.type = 'FUNCTION'
order by line;
v_single_text varchar2(4000);
v_tmp_text varchar2(10000) := ' ';
/*v_string varchar2(10000);*/
insert_flag char := '-';
read_flag char := '-';
update_flag char := '-';
delete_flag char := '-';
empty_space char(34) := ' ';
underline char(42) := '==========================================';
/*v_txt varchar2(10000) := ' ';*/
result_table varchar2(1000) := '/';
begin
open c_text;
loop
fetch c_text
into v_single_text;
exit when c_text%notfound;
v_tmp_text := v_tmp_text || chr(10) || rtrim(v_single_text);
/* print source code*/
/*dbms_output.put_line(v_single_text);*/
end loop;
close c_text;
/*DELETE SEARCH*/
v_check := instr(v_string_fnc, 'DELETE ');
if v_check < 1 then
dbms_output.put_line('THERE IS NO DELETE COMMAND');
else
dbms_output.put_line('THERE IS A DELETE COMMAND');
delete_flag := 'D';
v_check := instr(v_string_fnc, 'FROM ');
v_check := v_check + 5;
result_table := substr(v_string_fnc, v_check);
result_table := substr(result_table, 0, instr(result_table, ' '));
dbms_output.put_line('TABLE AFFECTED BY DELETE: ' || result_table);
end if;
/*SELECT SEARCH*/
v_check := instr(v_string_fnc, 'SELECT ');
if v_check < 1 then
dbms_output.put_line('THERE IS NO READ COMMAND');
else
dbms_output.put_line('THERE IS A READ COMMAND');
read_flag := 'R';
v_check := instr(v_string_fnc, 'FROM ');
v_check := v_check + 5;
result_table := substr(v_string_fnc, v_check);
result_table := substr(result_table, 0, instr(result_table, ' '));
dbms_output.put_line('TABLE AFFECTED BY READ: ' || result_table);
end if;
/*UPDATE SEARCH*/
v_check := instr(v_string_fnc, 'UPDATE ');
if v_check < 1 then
dbms_output.put_line('THERE IS NO UPDATE COMMAND');
else
dbms_output.put_line('THERE IS A UPDATE COMMAND');
update_flag := 'U';
v_check := instr(v_string_fnc, 'FROM ');
v_check := v_check + 5;
result_table := substr(v_string_fnc, v_check);
result_table := substr(result_table, 0, instr(result_table, ' '));
dbms_output.put_line('TABLE AFFECTED BY UPDATE: ' || result_table);
end if;
/*INSERT SEARCH*/
v_check := instr(v_string_fnc, 'INSERT ');
if v_check < 1 then
dbms_output.put_line('THERE IS NO CREATE COMMAND');
else
dbms_output.put_line('THERE IS A CREATE COMMAND');
insert_flag := 'C';
v_check := instr(v_string_fnc, 'FROM ');
v_check := v_check + 5;
result_table := substr(v_string_fnc, v_check);
result_table := substr(result_table, 0, instr(result_table, ' '));
dbms_output.put_line('TABLE AFFECTED BY CREATE: ' || result_table);
end if;
dbms_output.put_line(' ');
dbms_output.put_line('==========' || 'TABLE_NAME' || '==========' ||
'OPERATIONS' || '==');
dbms_output.put_line(empty_space || insert_flag || read_flag ||
update_flag || delete_flag);
dbms_output.put_line(underline);
end test_;
With that procedure I can extract and output my code, dbms needs a bit clean up but it will give the result I need.
Now a few questions, how to put a source code of my function to a variable that is not predefined, here is v_string_fnc but it needs to be predefined to work.
And how to link a certain operation with the table, here in my example is easy, one SELECT and keyword FROM that gives me a name of table.
Struggling continues
The bigger part it's done, just a tuning after this.
v_check := instr2(v_string_fnc, 'DROP ');
if v_check > 0 then
delete_flag := 'D';
v_check := instr2(v_string_fnc, 'TABLE ', v_check);
v_check := v_check + 6;
result_table := substr(v_string_fnc, v_check);
rest_string := result_table;
result_table := substr(result_table, 0, instr(result_table, ' '));
result_table := rtrim(result_table);
result_table := rtrim(result_table, ';');
merge into result_set
using dual
on (tables_used = result_table)
when matched then
update set drop_operation = delete_flag
when not matched then
insert
(tables_used, drop_operation)
values
(result_table, delete_flag);
while v_check > 0 loop
v_check := instr2(rest_string, 'DROP ');
if v_check > 0 then
delete_flag := 'D';
v_check := instr2(rest_string, 'TABLE ', v_check);
v_check := v_check + 6;
result_table := substr(rest_string, v_check);
rest_string := result_table;
result_table := substr(result_table, 0, instr(result_table, ' '));
result_table := rtrim(result_table);
result_table := rtrim(result_table, ';');
merge into result_set
using dual
on (tables_used = result_table)
when matched then
update set drop_operation = delete_flag
when not matched then
insert
(tables_used, drop_operation)
values
(result_table, delete_flag);
end if;
end loop;
end if;
The output from the below code is:
|LAT|MISC|SID|NO
MIN_LENGTH|1|2|1|1
MAX_LENGTH|6|6|4|2
The output is as I expect, but is there anyway to loop through the columns using an index (ie. j) instead of doing RESULTS(I).MAX_LENGTH , RESULTS(I).MAX_LENGTH etc ? The concern is that when adding extra columns to the 'R_RESULT_REC' record, another loop is required.
set serveroutput on
DECLARE
TYPE R_RESULT_REC IS RECORD
(COL_NAME VARCHAR2(100),
MIN_LENGTH NUMBER,
MAX_LENGTH NUMBER
);
TYPE tr_RESULT IS TABLE OF R_RESULT_REC;
RESULTS TR_RESULT := TR_RESULT();
v_counter NUMBER := 1;
BEGIN
FOR J IN (SELECT DISTINCT COLUMN_NAME FROM ALL_TAB_COLUMNS
WHERE OWNER = 'SYSTEM'
and TABLE_NAME = 'SPECCHAR')
LOOP
RESULTS.EXTEND;
RESULTS(V_COUNTER).COL_NAME := J.COLUMN_NAME;
EXECUTE IMMEDIATE 'SELECT MIN(LENGTH('||J.COLUMN_NAME||')),
MAX(LENGTH('||J.COLUMN_NAME||'))
FROM '||'SYSTEM'||'.'||'SPECCHAR' INTO
RESULTS(V_COUNTER).MIN_LENGTH,
RESULTS(V_COUNTER).MAX_LENGTH;
V_COUNTER := V_COUNTER + 1;
END LOOP;
FOR I IN RESULTS.FIRST .. RESULTS.LAST LOOP
IF I = RESULTS.LAST THEN
DBMS_OUTPUT.PUT_LINE(RESULTS(I).COL_NAME);
ELSIF I = RESULTS.FIRST THEN
DBMS_OUTPUT.PUT(' |'||RESULTS(I).COL_NAME||'|');
ELSE
DBMS_OUTPUT.PUT(RESULTS(I).COL_NAME||'|');
END IF ;
END LOOP;
FOR I IN RESULTS.FIRST .. RESULTS.LAST LOOP
IF I = RESULTS.LAST THEN
DBMS_OUTPUT.PUT_LINE(RESULTS(I).MIN_LENGTH);
ELSIF I = RESULTS.FIRST THEN
DBMS_OUTPUT.PUT('MIN_LENGTH|'||RESULTS(I).MIN_LENGTH||'|');
ELSE
DBMS_OUTPUT.PUT(RESULTS(I).MIN_LENGTH||'|');
END IF ;
END LOOP;
FOR I IN RESULTS.FIRST .. RESULTS.LAST LOOP
IF I = RESULTS.LAST THEN
DBMS_OUTPUT.PUT_LINE(RESULTS(I).MAX_LENGTH);
ELSIF I = RESULTS.FIRST THEN
DBMS_OUTPUT.PUT('MAX_LENGTH|'||RESULTS(I).MAX_LENGTH||'|');
ELSE
DBMS_OUTPUT.PUT(RESULTS(I).MAX_LENGTH||'|');
END IF ;
END LOOP;
end;
This uses DBMS_SQL, so it's pretty snarly to read. The main reason I saw to use it was that I could get columnar descriptions of a SQL statement and to a buffer-based, not object-based fetch.
Rather than making calls to DBMS_OUTPUT during the processing, it builds a table of records for output, using associative arrays for simplicity.
It could further be refined to have an array or parsable list of functions to apply to each function, but that seems excess to current requirements. The nature of the code would require editing if new aggregation functions are being added.
Call overview (2c + a + s):
3 loops;
2 loops over column list (c),
1 loop over number of analytic functions (a).
1 SQL statement against table data (s).
OP's call overview (c*s + a + 1):
1 loop, executing a sql statement against table data per column (c*s)
a+1 loops, where a is the number of analytic functions
Test data:
1 select min(length(GP_ID)), max(length(GP_ID)),
2 min(length(GGP_ID)), max(length(GGP_ID)),
3 min(length(OBJECT_NAME)), max(length(OBJECT_NAME))
4* from AMUSCH.GP
SQL> /
MIN(LENGTH(GP_ID)) MAX(LENGTH(GP_ID)) MIN(LENGTH(GGP_ID))
MAX(LENGTH(GGP_ID)) MIN(LENGTH(OBJECT_NAME)) MAX(LENGTH(OBJECT_NAME))
1 7 1
4 9 41
Code:
declare
p_owner varchar2(30);
p_table_name varchar2(30);
TYPE OUTPUT_TAB_TYPE IS TABLE OF VARCHAR2(32767) index by binary_integer;
OUTPUT_TAB OUTPUT_TAB_TYPE;
l_columns_tab dbms_sql.desc_tab;
l_columns_cur integer;
l_columns_sql varchar2(32767);
l_columns_cnt number;
l_minmax_sql varchar2(32767);
l_minmax_cur integer;
l_minmax_tab dbms_sql.desc_tab;
l_minmax_cnt number;
l_fetch_ok number;
l_fetch_value number;
begin
p_owner := 'AMUSCH';
p_table_name := 'GP';
output_tab(1) := lpad(' ', 20, ' ');
output_tab(2) := lpad('MIN_LENGTH', 20, ' ');
output_tab(3) := lpad('MAX_LENGTH', 20, ' ');
l_columns_sql := 'select * from ' || p_owner || '.' || p_table_name ||
' where 1 = 0';
l_columns_cur := dbms_sql.open_cursor;
dbms_sql.parse (l_columns_cur, l_columns_sql, dbms_sql.native);
dbms_sql.describe_columns (l_columns_cur, l_columns_cnt, l_columns_tab);
-- build the min/max sql statement
l_minmax_sql := 'select ' ;
for i in 1..l_columns_cnt
loop
l_minmax_sql := l_minmax_sql ||
' min(length(' || l_columns_tab(i).col_name || ')), ';
l_minmax_sql := l_minmax_sql ||
' max(length(' || l_columns_tab(i).col_name || ')), ';
end loop;
l_minmax_sql := substr(l_minmax_sql, 1,
length(l_minmax_sql) - 2); -- trim trailing comma
l_minmax_sql := l_minmax_sql || ' from ' || p_owner || '.' || p_table_name;
l_minmax_cur := dbms_sql.open_cursor;
dbms_sql.parse (l_minmax_cur, l_minmax_sql, dbms_sql.native);
dbms_sql.describe_columns (l_minmax_cur, l_minmax_cnt, l_minmax_tab);
for i in 1..l_minmax_cnt
loop
dbms_sql.define_column(l_minmax_cur, i, l_fetch_value);
end loop;
l_fetch_ok := dbms_sql.execute(l_minmax_cur);
loop
l_fetch_ok := dbms_sql.fetch_rows(l_minmax_cur);
exit when l_fetch_ok = 0;
-- loop over the columns selected over
for i in 1..l_columns_cnt
loop
output_tab(1) := output_tab(1) || '|' || l_columns_tab(i).col_name;
dbms_sql.column_value(l_minmax_cur, (2*i-1), l_fetch_value);
output_tab(2) := output_tab(2) || '|' ||
lpad(l_fetch_value, length(l_columns_tab(i).col_name), ' ');
dbms_sql.column_value(l_minmax_cur, (2*i), l_fetch_value);
output_tab(3) := output_tab(3) || '|' ||
lpad(l_fetch_value, length(l_columns_tab(i).col_name), ' ');
end loop;
end loop;
if dbms_sql.is_open(l_minmax_cur) then
dbms_sql.close_cursor (l_minmax_cur);
end if;
if dbms_sql.is_open (l_columns_cur) then
dbms_sql.close_cursor (l_columns_cur);
end if;
for i in output_tab.first..output_tab.last
loop
dbms_output.put_line(output_tab(i));
end loop;
end;
/
Results:
|GP_ID|GGP_ID|OBJECT_NAME
MIN_LENGTH| 1| 1| 9
MAX_LENGTH| 7| 4| 41
If you want to use the DBMS_SQL package (which is sometimes very complex), then there is a DBMS_SQL.COLUMN_VALUE function that may work for you.
update:
Or even better: DBMS_SQL.DESC_REC
you can refer to:
http://docs.oracle.com/cd/B19306_01/appdev.102/b14258/d_sql.htm#i996963
notice example 8
I haven't tested it
update:
Perhaps what you really want is to loop on an Object type attributes and not a table column, so maybe you should try a different approach:
Make your type R_RESULT_REC an Object type in the DB and then you can loop on the query results:
SELECT attr_name
FROM user_type_attrs
WHERE type_name = 'R_RESULT_REC'
It's not like working with indexes but you still don't need to hard code the column names / type attributes
here is the code (based on yours):
CREATE OR REPLACE TYPE R_RESULT_REC AS OBJECT
(
COL_NAME VARCHAR2(100),
MIN_LENGTH NUMBER,
MAX_LENGTH NUMBER
);
/
and then:
DECLARE
TYPE tr_RESULT IS TABLE OF R_RESULT_REC;
RESULTS TR_RESULT := TR_RESULT();
v_counter NUMBER := 1;
v_max number;
v_min number;
BEGIN
FOR J IN (SELECT DISTINCT COLUMN_NAME
FROM ALL_TAB_COLUMNS
WHERE OWNER = 'SYSTEM'
and TABLE_NAME = 'SPECCHAR') LOOP
EXECUTE IMMEDIATE 'SELECT MIN(LENGTH(' || J.COLUMN_NAME || ')),
MAX(LENGTH(' || J.COLUMN_NAME || ')) FROM ' ||
'SPECCHAR'
INTO v_min, v_max;
RESULTS.EXTEND;
RESULTS(V_COUNTER) := new R_RESULT_REC(J.COLUMN_NAME, v_min, v_max);
V_COUNTER := V_COUNTER + 1;
END LOOP;
for r in (select attr_name
from all_type_attrs t
where t.owner = 'SYSTEM'
and t.type_name = 'R_RESULT_REC') loop
FOR I IN RESULTS.FIRST .. RESULTS.LAST LOOP
IF I = RESULTS.LAST THEN
execute immediate 'declare rec R_RESULT_REC := :0; begin' ||
' DBMS_OUTPUT.PUT_LINE(rec.' || r.attr_name || ');' ||
'end;'
using RESULTS(I);
ELSIF I = RESULTS.FIRST THEN
execute immediate 'declare rec R_RESULT_REC := :0; begin' ||
' DBMS_OUTPUT.PUT(''' || r.attr_name ||
'|'' || rec.' || r.attr_name || ' || ''|'');' ||
'end;'
using RESULTS(I);
ELSE
execute immediate 'declare rec R_RESULT_REC := :0; begin' ||
' DBMS_OUTPUT.PUT(rec.' || r.attr_name ||
' || ''|''); ' || 'end;'
using RESULTS(I);
END IF;
END LOOP;
end loop;
end;
If you'll add another attribute to the Record (and initiate it with values) , it will automatic display it.
Take advantage of Oracle's stats for this.
First, fully build stats on table using dbms_stats.gather_table_stats
Then, create the following function to help translate the raw low/high values that Oracle stores in all_tab_columns
create or replace function show_raw(i_raw raw, i_type varchar2)
return varchar2 is
l_varchar2 varchar2(32);
l_number number;
l_date date;
l_nvarchar2 nvarchar2(32);
l_rowid rowid;
l_char char;
begin
if (i_type = 'VARCHAR2') then
DBMS_STATS.CONVERT_RAW_VALUE(i_raw, l_varchar2);
return to_char(l_varchar2);
elsif(i_type = 'NUMBER') then
DBMS_STATS.CONVERT_RAW_VALUE(i_raw, l_number);
return to_char(l_number);
elsif(i_type = 'DATE') then
DBMS_STATS.CONVERT_RAW_VALUE(i_raw, l_date);
return to_char(l_date);
elsif(i_type = 'NVARCHAR2') then
DBMS_STATS.CONVERT_RAW_VALUE(i_raw, l_nvarchar2);
return to_char(l_nvarchar2);
elsif(i_type = 'ROWID') then
DBMS_STATS.CONVERT_RAW_VALUE(i_raw, l_rowid);
return to_char(l_rowid);
elsif(i_type = 'CHAR') then
DBMS_STATS.CONVERT_RAW_VALUE(i_raw, l_char);
return l_char;
else return 'Unknown type value';
end if;
end;
Then, just select the low/high values for each column:
select column_id,
column_name,
data_type,
show_raw(low_value, data_type) as min_val,
show_raw(high_value, data_type) as max_val
from all_tab_columns
where table_name = 'SOME_TABLE'
and owner = 'SOME_OWNER'
;
First, I know there are plenty of posts etc relating to the use of CASE in place of DECODE, but they don't appear to fit with my concern.
I am trying to convert an Oracle PL/SQL procedure to SQL Server. The procedure builds a SQL statement dynamically, and uses the DECODE function to create a x-tab. The procedure is as so:
PROCEDURE GET_XFORM_DATALOGS (
fLOTCODE IN VARCHAR2,
THEDATA OUT SYS_REFCURSOR) IS
-- VARIABLE DECLARATIONS
TYPE loc_array_type IS TABLE OF VARCHAR2(40); -- array type
loc_array loc_array_type; -- array for test names
prod VARCHAR2(20); -- product ID
step VARCHAR2(20); -- step ID
sql_str VARCHAR2(32000); -- SQL statement
-- EXECUTABLE CODE
BEGIN -- executable part starts here
-- get the test names for the given lot code
SELECT
PT_TESTNAME BULK COLLECT INTO loc_array
FROM
(
SELECT DISTINCT
TESTPARMS.PT_TESTNAME,
TESTPARMS.PT_TESTNUM
FROM
"PRETEST".PRETEST_LOT#PRS_DBLINK LOT,
"PRETEST".PRETEST_MEASURE#PRS_DBLINK MEASURE,
"PRETEST".PRETEST_TEST_PARMS#PRS_DBLINK TESTPARMS
WHERE
LOT.PT_LOTSQ = MEASURE.PT_LOTSQ AND
MEASURE.PT_LOTSQ = TESTPARMS.PT_LOTSQ AND
MEASURE.PT_TESTNUM = TESTPARMS.PT_TESTNUM AND
LOT.PT_LOTID = fLOTCODE
ORDER BY
PT_TESTNUM
);
-- build the SQL string
sql_str := '';
sql_str := sql_str || 'SELECT ';
sql_str := sql_str || ' PRETEST_LOT.PT_LOTID, ';
sql_str := sql_str || ' PRETEST_LOT.PT_LOCTYPE, ' ;
sql_str := sql_str || ' PRETEST_LOT.PT_TESTDATE, ';
sql_str := sql_str || ' PRETEST_MEASURE.PT_WAFERID, ';
sql_str := sql_str || ' PRETEST_MEASURE.PT_XCOORD, ';
sql_str := sql_str || ' PRETEST_MEASURE.PT_YCOORD, ';
-- add the decodes for column headings
FOR i IN loc_array.first..loc_array.last LOOP
sql_str := sql_str || 'max ( decode ( PRETEST_TEST_PARMS.PT_TESTNAME, '''
|| loc_array(i) || ''', PRETEST_MEASURE.PT_MEAS_VALUE, null ) ) '
|| loc_array(i);
IF (i < loc_array.last) THEN
sql_str := sql_str || ', ';
END IF;
END LOOP;
-- build the remainder of the SQL
sql_str := sql_str || ' FROM ';
sql_str := sql_str || ' "PRETEST".PRETEST_LOT#PRS_DBLINK PRETEST_LOT, ';
sql_str := sql_str || ' "PRETEST".PRETEST_MEASURE#PRS_DBLINK PRETEST_MEASURE, ';
sql_str := sql_str || ' "PRETEST".PRETEST_TEST_PARMS#PRS_DBLINK PRETEST_TEST_PARMS ';
sql_str := sql_str || ' WHERE ';
sql_str := sql_str || ' PRETEST_LOT.PT_LOTSQ = PRETEST_MEASURE.PT_LOTSQ AND ';
sql_str := sql_str || ' PRETEST_MEASURE.PT_LOTSQ = PRETEST_TEST_PARMS.PT_LOTSQ AND ';
sql_str := sql_str || ' PRETEST_MEASURE.PT_TESTNUM = PRETEST_TEST_PARMS.PT_TESTNUM AND ';
sql_str := sql_str || ' (PRETEST_LOT.PT_LOTID = :fFLOTCODE) ';
sql_str := sql_str || ' GROUP BY ';
sql_str := sql_str || ' PRETEST_LOT.PT_LOTID, ';
sql_str := sql_str || ' PRETEST_LOT.PT_LOCTYPE, ';
sql_str := sql_str || ' PRETEST_LOT.PT_TESTDATE, ';
sql_str := sql_str || ' PRETEST_MEASURE.PT_WAFERID, ';
sql_str := sql_str || ' PRETEST_MEASURE.PT_XCOORD, ';
sql_str := sql_str || ' PRETEST_MEASURE.PT_YCOORD ';
sql_str := sql_str || ' ORDER BY ';
sql_str := sql_str || ' PRETEST_LOT.PT_TESTDATE ';
-- run the query
OPEN THEDATA FOR sql_str USING fLOTCODE;
END GET_XFORM_DATALOGS;
The question I have is, is this going to be possible to implement in SQL Server? I can't seem to work out how to use CASE WHEN THEN etc to create column headings based on the dynamic data.
Sorry if what I've asked is unclear. Thanks for any help you can offer.
BBz
Well the Oracle equivalent using CASE would be:
sql_str := sql_str || 'max ( CASE WHEN PRETEST_TEST_PARMS.PT_TESTNAME = '''
|| loc_array(i) || ''' THEN PRETEST_MEASURE.PT_MEAS_VALUE END ) '
|| loc_array(i);
So try converting that to SQL Server instead.