DB2 sql報錯後查證原因與解決問題的方法
1.對於執行中的報錯，可以在db2命令行下運行命令 ： db2=>? SQLxxx 查看對應的報錯原因及解決方法。
2.錯誤SQL0206N SQLSTATE=42703 檢測到一個未定義的列、屬性或參數名。
SQL0206N "SQL_COU_ALL" is not valid in the context where it is used. SQLSTATE=42703
db2 => ? "42703"
db2 => ? SQL0206N
3.錯誤SQL0668N code "7" SQLSTATE=57016 表處於pending state，需要重組該表。
db2 => ? SQL0668N code 7
SQL0668N Operation not allowed for reason code "<reason-code>" on table "<table-name>".
Explanation:說明
Access to table "<table-name>" is restricted. The cause is based on the following reason codes "<reason-code>":
User response:用戶響應
7 Reorganize the table using the REORG TABLE command.
For a table in the reorg pending state, note that the following clauses are not allowed when reorganizing the table:
* The ON DATA PARTITION clause for a partitioned table when table has nonpartitioned indexes defined on the table
4.錯誤SQL20054N code="23" SQLSTATE=55019 對表的修改次數達到3次，必須重組表
ALTER TABLE xxx.FM_BORRO ALTER COLUMN DOCUMENT_TYPE_1 SET NOT NULL
報錯:SQL20054N The table "xxx.FM_BORROW" is in an invalid state for the operation. Reason code="23". SQLSTATE=55019
db2 => ? SQL20054N
SQL20054N The table "<table-name>" is in an invalid state for the operation. Reason code="<reason-code>".
Explanation:
The table is in a state that does not allow the operation. The "<reason-code>" indicates the state of the table that prevents the operation.
23 The maximum number of REORG-recommended alters have been
performed. Up to three REORG-recommended operations are allowed
on a table before a reorg must be performed, to update the
tables rows to match the current schema.
User response:
23 Reorg the table using the reorg table command.
說明：當對表結構進行更改時，也可能導致表狀態異常。比如，以下操作可能會導致表處於reorg-pending狀態。
(1) alter table <tablename> alter <colname> set data type <new data type>
(2) alter table <tablename> alter <colname> set not null
(3) alter table <tablename> drop column <colname>
(4) ……
出現reorg pending的根源是當表結構變化後影響了數據行中的數據格式，這時需要對表做reorg。可能的錯誤號是：
01.SQL0668N Operation not allowed for reason code "7" on table "SDD.ST_INCRE008". SQLSTATE=57016
03.SQL20054N The table "<table-name>" is in an invalid state for the operation. Reason code="7".
復制代碼每一個表在不進行重組（Reorg）的前提下，只允許進行3次結構上的修改。三次更改後必須對表進行重組。
REORG TABLE "xx"."FM_BORROW" ALLOW NO ACCESS KEEPDICTIONARY;
5.報錯 SQL0670N SQLSTATE=54010 該表所有字段長度之和大於當前數據庫頁大小（8K）
ALTER TABLE xxx.FAQ ALTER COLUMN FAQ_UNIT_NAME SET DATA TYPE VARCHAR(800)
報錯 SQL0670N The row length of the table exceeded a limit of "8101" bytes. (Table space "SHJD_DATA".) SQLSTATE=54010
db2 => ? SQL0670N
SQL0670N The row length of the table exceeded a limit of "<length>" bytes. (Table space "<tablespace-name>".)
Explanation:
The row length of a table in the database manager cannot exceed:
* 4005 bytes in a table space with a 4K page size
* 8101 bytes in a table space with an 8K page size
* 16293 bytes in a table space with an 16K page size
* 32677 bytes in a table space with an 32K page size
The length is calculated by adding the internal lengths of the columns.Details of internal column lengths can be found under CREATE TABLE in the SQL Reference.
User response:
指定頁大小更大的表空間；消除表中的一列或多列
6.報錯 SQL0190N SQLSTATE=42837 不能改變該列，因為它的屬性與當前的列屬性不兼容
ALTER TABLE xxx.BP_TMPDATA_1_TB_1903 ALTER COLUMN RATE SET DATA TYPE DECIMAL(6,4)
報錯 SQL0190N ALTER TABLE "BP_TMPDATA_1_TB_1903" specified attributes for column "RATE" that are not compatible with the existing column. SQLSTATE=42837
說明： BP_TMPDATA_1_TB_1903 現有數據的精度超過了 DECIMAL(6,4) ，比如100.00
7.報錯 SQL30081N SQLSTATE=08001 檢測到通信錯誤 無法與應用程序服務器或其他服務器建立連接
SQL30081N A communication error has been detected.
Communication protocol being used: "TCP/IP". Communication API being used: "SOCKETS".
Location where the error was detected: "10.0.0.200". Communication function detecting the error: "selectForConnectTimeout".
Protocol specific error code(s): "0", "*", "*". SQLSTATE=08001
檢查服務器的配置情況如下：
驗證存在的DB2數據庫
db2 list db directory
db2 list db directory show detail
驗證實例使用的通訊協議，查看DB2COMM變量
db2set -all
查看數據庫管理器的配置，查看SVCENAME（特指tcpip協議）
db2 get dbm cfg
查看/etc/services中，有無與上面對應SVCENAME的端口，例如：
db2cDB2 50000/tcp
驗證遠程服務器實例配置
db2 list node directory
db2 list node directory show detail
ping hostname來驗證通訊
使用telnet hostname port來驗證是否能連到實例
用DB2提供的PCT工具來檢測一下
DB2 sql報錯後查證原因與解決問題的方法