sql - 在 Oracle SQL 中将行可重复插入到表中
问题描述
我想要一个可以多次运行的脚本,而不是在第一次之后向数据库状态添加一行。它应该在 KPI_TYPE 表中插入包含两列的行,列是 KPI_TYPE_ID 和 NAME,如果它更新序列 KPI_TYPE_SEQ 会很好,但仅在第一次运行时。
我得到的第一个想法是:
merge into KPI_TYPE dest
using (select 26 as KPI_TYPE_ID, 'Web Service Availability' as NAME from dual) src
on (src.KPI_TYPE_ID = dest.KPI_TYPE_ID)
when matched then update set
dest.NAME = src.NAME
when not matched then
insert (KPI_TYPE_ID, NAME)
values (src.KPI_TYPE_ID, src.NAME);
这几乎实现了我想要的,但它不会更新序列。如果序列的更新仅在值为 26 时发生,那也很好。如果它发生在第二个 SQL 命令中就可以了。
还有一个触发器将序列附加到表中:
create or replace TRIGGER "SCHEMA"."B1_KPI_TYPE"
BEFORE INSERT ON KPI_TYPE
FOR EACH ROW
DECLARE
BEGIN
IF( :new.KPI_TYPE_ID IS NULL )
THEN
:new.KPI_TYPE_ID := KPI_TYPE_SEQ.nextval;
END IF;
END;
之前的示例数据:
11 DB Connectivity
12 DB Health Check
13 SOAP Service Availability
14 FTP/SFTP Server Availability
18 Queue Check
19 Business Check
20 Engine Availability
21 Backlog Management
23 Composite KPI
24 DB Objects Check
25 SMSC Gateway Availability
前序:
CREATED 01.06.18
LAST_DDL_TIME 01.06.18
SEQUENCE_OWNER SCHEMA
SEQUENCE_NAME KPI_TYPE_SEQ
MIN_VALUE 1
MAX_VALUE 9999999999999999999999999999
INCREMENT_BY 1
CYCLE_FLAG N
ORDER_FLAG N
CACHE_SIZE 0
LAST_NUMBER 26
第一次运行脚本后:
11 DB Connectivity
12 DB Health Check
13 SOAP Service Availability
14 FTP/SFTP Server Availability
18 Queue Check
19 Business Check
20 Engine Availability
21 Backlog Management
23 Composite KPI
24 DB Objects Check
25 SMSC Gateway Availability
26 Web Service Availability
第一次运行后的序列:
CREATED 01.06.18
LAST_DDL_TIME 01.06.18
SEQUENCE_OWNER SCHEMA
SEQUENCE_NAME KPI_TYPE_SEQ
MIN_VALUE 1
MAX_VALUE 9999999999999999999999999999
INCREMENT_BY 1
CYCLE_FLAG N
ORDER_FLAG N
CACHE_SIZE 0
LAST_NUMBER 27
第二次脚本运行后:
11 DB Connectivity
12 DB Health Check
13 SOAP Service Availability
14 FTP/SFTP Server Availability
18 Queue Check
19 Business Check
20 Engine Availability
21 Backlog Management
23 Composite KPI
24 DB Objects Check
25 SMSC Gateway Availability
26 Web Service Availability (It is also ok if this gets updated to 26 New Name)
第二次运行后的序列:
CREATED 01.06.18
LAST_DDL_TIME 01.06.18
SEQUENCE_OWNER SCHEMA
SEQUENCE_NAME KPI_TYPE_SEQ
MIN_VALUE 1
MAX_VALUE 9999999999999999999999999999
INCREMENT_BY 1
CYCLE_FLAG N
ORDER_FLAG N
CACHE_SIZE 0
LAST_NUMBER 27
我现在正在尝试这个:
declare v_seqvariable number;
begin
SELECT last_number INTO v_seqvariable
FROM all_sequences
WHERE sequence_owner = 'SCHEMA'
AND sequence_name = 'KPI_TYPE_SEQ';
if v_seqvariable = 26 then DBMS_OUTPUT.put_line('Is 26'); else DBMS_OUTPUT.put_line('Is not 26'); end if;
end;
但是,我没有得到任何输出。我必须冲洗它还是什么?
解决方案
The following code does to the sequence what I want:
SET SERVEROUTPUT ON;
declare
v_seqvariable number;
v_result number;
begin
SELECT last_number INTO v_seqvariable
FROM all_sequences
WHERE sequence_owner = 'SCHEMA'
AND sequence_name = 'KPI_TYPE_SEQ';
if v_seqvariable = 26 then DBMS_OUTPUT.put_line('Is 26'); select SCHEMA.KPI_TYPE_SEQ.nextval INTO v_result FROM DUAL; else DBMS_OUTPUT.put_line('Is not 26'); end if;
end;
Output is:
anonymer Block abgeschlossen
Is 26
anonymer Block abgeschlossen
Is not 26
Now what is left is that I only have to test the MERGE code.