我正在尝试创建一个类似的函数：
--#SET TERMINATOR @
CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11))
RETURNS INTEGER
RETURNS NULL ON NULL INPUT
FENCED THREADSAFE
DETERMINISTIC
NO SQL
LANGUAGE JAVA
PARAMETER STYLE JAVA
EXTERNAL NAME
'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint'
NO EXTERNAL ACTION
@
来自飞行路线。 jar 文件已经安装在服务器上，我可以通过 clp 毫无问题地创建该函数：
~]$ db2 -v -td@ -f aa.sql
CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11))
RETURNS INTEGER
RETURNS NULL ON NULL INPUT
FENCED THREADSAFE
DETERMINISTIC
NO SQL
LANGUAGE JAVA
PARAMETER STYLE JAVA
EXTERNAL NAME
'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint'
NO EXTERNAL ACTION
DB20000I The SQL command completed successfully.
我还尝试从本地计算机通过 dbeaver 创建，没有出现问题：
Updated Rows 0
Query CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11))
RETURNS INTEGER
RETURNS NULL ON NULL INPUT
FENCED THREADSAFE
DETERMINISTIC
NO SQL
LANGUAGE JAVA
PARAMETER STYLE JAVA
EXTERNAL NAME
'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint'
NO EXTERNAL ACTION
Finish time Tue Jan 11 22:14:46 CET 2022
但是如果我尝试从 Flyway 运行相同的文件：
]$ flyway -schemas=NYA_FLYWAY -table="FLYWAY_SCHEMA_HISTORY" -driver=${driver} -url=jdbc:db2://${host}:${port}/${db} -user=${username} -password=${passwd} -jarDirs=${jarDirs} -locations="filesystem:${upgradedir}" migrate
A new version of Flyway is available
Upgrade to Flyway 8.4.1: https://rd.gt/2X0gakb
Flyway Community Edition 8.0.5 by Redgate
Database: jdbc:db2://130.239.91.21:50000/NYA (DB2/LINUXX8664 11.5)
Successfully validated 36 migrations (execution time 00:00.027s)
Current version of schema "NYA_FLYWAY": 22.223.100.3
Migrating schema "NYA_FLYWAY" to version "22.223.100.4"
ERROR: Migration of schema "NYA_FLYWAY" to version "22.223.100.4" failed! Changes successfully rolled back.
ERROR: Migration V22.223.100.4__.sql failed
------------------------------------
SQL State : 46008
Error Code : -20204
Message : The user defined function or procedure "NYA.QUINT_2_UINT" was unable to map to a single Java method.. SQLCODE=-20204, SQLSTATE=46008, DRIVER=4.29.24
Location : /home/lejo0004/Project/db-legacy/nya/src/main/resources/db/migration/V22.223.100/V22.223.100.4__.sql (/home/lejo0004/Project/db-legacy/nya/src/main/resources/db/migration/V22.223.100/V22.223.100.4__.sql)
Line : 3
Statement : CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11))
RETURNS INTEGER
RETURNS NULL ON NULL INPUT
FENCED THREADSAFE
DETERMINISTIC
NO SQL
LANGUAGE JAVA
PARAMETER STYLE JAVA
EXTERNAL NAME
'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint'
NO EXTERNAL ACTION
Caused by: Migration V22.223.100.4__.sql failed
------------------------------------
SQL State : 46008
Error Code : -20204
Message : The user defined function or procedure "NYA.QUINT_2_UINT" was unable to map to a single Java method.. SQLCODE=-20204, SQLSTATE=46008, DRIVER=4.29.24
Location : /home/lejo0004/Project/db-legacy/nya/src/main/resources/db/migration/V22.223.100/V22.223.100.4__.sql (/home/lejo0004/Project/db-legacy/nya/src/main/resources/db/migration/V22.223.100/V22.223.100.4__.sql)
Line : 3
Statement : CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11))
RETURNS INTEGER
RETURNS NULL ON NULL INPUT
FENCED THREADSAFE
DETERMINISTIC
NO SQL
LANGUAGE JAVA
PARAMETER STYLE JAVA
EXTERNAL NAME
'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint'
NO EXTERNAL ACTION
Caused by: com.ibm.db2.jcc.am.SqlException: The user defined function or procedure "NYA.QUINT_2_UINT" was unable to map to a single Java method.. SQLCODE=-20204, SQLSTATE=46008, DRIVER=4.29.24
我使用与 dbeaver 和 Flyway 相同的驱动程序。我也尝试从 gradle 运行它，但出现同样的错误。有什么线索可能会导致 Flyway 出现此问题吗？
jar 中还有其他功能，我尝试过的所有功能，都遇到与上述相同的问题
FWIW，底层功能是 Proquints 提案：可读、可拼写和可发音的标识符
编辑：
jar 文件的安装方式通常与 Mark 在 calling-sqlj-install-jar-from-jdbc using gradle 中演示的方式类似。
但是为了消除那里的任何错误，我在服务器上手动安装了 jarfile：
[db2inst1@nya-01 ~]$ db2 "call sqlj.install_jar('file:///opt/nya/users/db2inst1/STRINGUTIL.jar', 'STRINGUTIL')"
SQL20201N The install, replace or remove of "DB2INST1.STRINGUTIL" failed as
the jar name is invalid. SQLSTATE=46002
[db2inst1@nya-01 ~]$ db2 "call sqlj.replace_jar('file:///opt/nya/users/db2inst1/STRINGUTIL.jar', 'STRINGUTIL')"
DB20000I The CALL command completed successfully.
[db2inst1@nya-01 ~]$ db2 "call sqlj.refresh_classes()"
DB20000I The CALL command completed successfully.
现在，在服务器上我可以：
[db2inst1@nya-01 ~]$ db2 connect
Database Connection Information
Database server = DB2/LINUXX8664 11.5.6.0
SQL authorization ID = DB2INST1
Local database alias = EKLN_N11
[db2inst1@nya-01 ~]$ db2 -v -td@ -f aa.sql
CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11))
RETURNS INTEGER
RETURNS NULL ON NULL INPUT
FENCED THREADSAFE
DETERMINISTIC
NO SQL
LANGUAGE JAVA
PARAMETER STYLE JAVA
EXTERNAL NAME
'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint'
NO EXTERNAL ACTION
DB20000I The SQL command completed successfully.
db2 "VALUES NYA.QUINT_2_UINT('aabbccddee')"
1
-----------
17
1 record(s) selected.
在我的工作站上使用 dbeaver，针对同一服务器/数据库，也可以正常工作（因此 jdbc 本身似乎不是问题）：
CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11))
RETURNS INTEGER
RETURNS NULL ON NULL INPUT
FENCED THREADSAFE
DETERMINISTIC
NO SQL
LANGUAGE JAVA
PARAMETER STYLE JAVA
EXTERNAL NAME
'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint'
NO EXTERNAL ACTION
@
VALUES NYA.QUINT_2_UINT('ddeeaabbccd') @
1 |
-------+
1114113|
但是，如果我尝试从我的工作站上的 Flyway 针对同一服务器/数据库运行它，我会收到错误：
SQL State : 46008
Error Code : -20204
Message : The user defined function or procedure "NYA.QUINT_2_UINT" was unable to map to a single Java method.. SQLCODE=-20204, SQLSTATE=46008, DRIVER=4.29.24
java代码本身并不是很令人兴奋：
package se.uhr.nya.commons.db.procedures;
public class Proquint {
...
static int quint2uint(String quint) {
long res = 0;
for (char c : quint.toCharArray()) {
int index = indexOf(uint2consonant, c);
if (index != -1) {
res <<= 4;
res += index;
} else {
index = indexOf(uint2vowel, c);
if (index != -1) {
res <<= 2;
res += index;
}
}
}
return (int) res;
}
我对所有 3 种情况使用了相同的用户/密码（clp、dbeaver.flyway）
编辑2：
我做了一个小测试程序：
import java.sql.*;
public class tst {
public static void main(String [] args) {
String urlPrefix = "jdbc:db2:";
String url;
String user;
String password;
String dummy;
Connection con;
Statement stmt;
ResultSet rs;
System. out.println ("**** Enter class tst" );
if (args.length !=3)
{
System. err.println ("Invalid value. First argument appended to " +
"jdbc:db2: must specify a valid URL." );
System. err.println ("Second argument must be a valid user ID." );
System. err.println ("Third argument must be the password for the user ID.");
System. exit(1);
}
url = urlPrefix + args[0];
user = args[1];
password = args[2];
try {
Class. forName("com.ibm.db2.jcc.DB2Driver");
System. out.println("**** Loaded the JDBC driver" );
con = DriverManager. getConnection(url, user, password);
con.setAutoCommit( false);
System. out.println("**** Created a JDBC connection to the data source");
stmt = con.createStatement();
System. out.println("**** Created JDBC Statement object" );
String s = "CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11)) ";
s += "RETURNS INTEGER ";
s += "RETURNS NULL ON NULL INPUT ";
s += "FENCED THREADSAFE ";
s += "DETERMINISTIC ";
s += "NO SQL LANGUAGE JAVA PARAMETER STYLE JAVA ";
s += "EXTERNAL NAME 'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint' ";
s += "NO EXTERNAL ACTION";
//stmt.executeUpdate(s);
stmt.execute(s);
System. out.println("**** Created function" );
s = "values NYA.QUINT_2_UINT('aabbccddeeg')";
rs = stmt.executeQuery(s);
while (rs.next()) {
dummy = rs.getString(1);
System. out.println("number = " + dummy);
}
System. out.println("**** Fetched all rows from JDBC ResultSet" );
rs.close();
System. out.println("**** Closed JDBC ResultSet" );
// Close the Statement
stmt.close();
System. out.println("**** Closed JDBC Statement" );
// Connection must be on a unit-of-work boundary to allow close
con.commit();
System. out.println ( "**** Transaction committed" );
con.close();
System. out.println("**** Disconnected from data source" );
System. out.println("**** JDBC Exit from class tst - no errors" );
}
catch(ClassNotFoundException e) {
System. err.println("Could not load JDBC driver" );
System. out.println("Exception: " + e);
e.printStackTrace();
}
catch(SQLException ex) {
System. err.println("SQLException information" );
while(ex!=null ) {
System. err.println ("Error msg: " + ex.getMessage());
System. err.println ("SQLSTATE: " + ex.getSQLState());
System. err.println ("Error code: " + ex.getErrorCode());
ex.printStackTrace();
ex = ex.getNextException(); // For drivers that support chained exceptions
}
}
}
}
并将其 jdbc 跟踪与 Flyway 的 jdbc 跟踪进行比较。飞行轨迹如下所示：
[jcc][Time:2022-01-13-12:22:49.714][Thread:main][Statement@275fe372]setEscapeProcessing (false) called
[jcc][Thread:main][SystemMonitor:start]
[jcc][Time:2022-01-13-12:22:49.714][Thread:main][Statement@275fe372]execute (CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11)) RETURNS INTEGER RETURNS NULL ON NULL INPUT FENCED THREADSAFE DETERMINISTIC NO SQL LANGUAGE JAVA PARAMETER STYLE JAVA EXTERNAL NAME 'STRINGUTIL:se.uhr.nya.commons.db.procedures.Proquint!quint2uint' NO EXTERNAL ACTION) called
[jcc][Time:2022-01-13-12:22:49.714][Thread:main][Statement@275fe372]stmt_bidiTransform (CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11)) RETURNS INTEGER RETURNS NULL ON NULL INPUT FENCED THREADSAFE DETERMINISTIC NO SQL LANGUAGE JAVA PARAMETER STYLE JAVA EXTERNAL NAME 'STRINGUTIL:se.uhr.nya.commons.db.procedures.Proquint!quint2uint' NO EXTERNAL ACTION) called
[jcc][Time:2022-01-13-12:22:49.714][Thread:main][Statement@275fe372]stmt_bidiTransform not enabled (CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11)) RETURNS INTEGER RETURNS NULL ON NULL INPUT FENCED THREADSAFE DETERMINISTIC NO SQL LANGUAGE JAVA PARAMETER STYLE JAVA EXTERNAL NAME 'STRINGUTIL:se.uhr.nya.commons.db.procedures.Proquint!quint2uint' NO EXTERNAL ACTION) called
[jcc][t4][time:2022-01-13-12:22:49.714][Thread:main][tracepoint:1][Request.flush]
而测试程序：
[jcc][Thread:main][SystemMonitor:start]
[jcc][Time:2022-01-13-12:22:28.089][Thread:main][Statement@1372ed45]execute (CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11)) RETURNS INTEGER RETURNS NULL ON NULL INPUT FENCED THREADSAFE DETERMINISTIC NO SQL LANGUAGE JAVA PARAMETER STYLE JAVA EXTERNAL NAME 'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint' NO EXTERNAL ACTION) called
[jcc][Time:2022-01-13-12:22:28.089][Thread:main][Statement@1372ed45]stmt_bidiTransform (CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11)) RETURNS INTEGER RETURNS NULL ON NULL INPUT FENCED THREADSAFE DETERMINISTIC NO SQL LANGUAGE JAVA PARAMETER STYLE JAVA EXTERNAL NAME 'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint' NO EXTERNAL ACTION) called
[jcc][Time:2022-01-13-12:22:28.089][Thread:main][Statement@1372ed45]stmt_bidiTransform not enabled (CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11)) RETURNS INTEGER RETURNS NULL ON NULL INPUT FENCED THREADSAFE DETERMINISTIC NO SQL LANGUAGE JAVA PARAMETER STYLE JAVA EXTERNAL NAME 'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint' NO EXTERNAL ACTION) called
>>> [jcc][t4] [time:2022-01-13-12:22:28.089][Thread:main]
>>> [tracepoint:10]SetClientPiggybackCommand: flowToServerNeeded() = true
>>> [jcc][t4] [time:2022-01-13-12:22:28.089][Thread:main]
>>> [tracepoint:10]SetClientPiggybackCommand: flowToServerNeeded() = true
[jcc][t4][time:2022-01-13-12:22:28.089][Thread:main][tracepoint:1][Request.flush]
即测试程序的作用是：
SetClientPiggybackCommand: flowToServerNeeded() = true
在Request.flush之前
但这是否相关我还不知道
编辑3：
[db2inst1@nya-03 ~]$ ls -lR sqllib/function/
sqllib/function/:
totalt 0
lrwxrwxrwx. 1 root db2iadm1 35 14 sep 14.15 db2json -> /opt/ibm/db2/V11.5/function/db2json*
lrwxrwxrwx. 1 root db2iadm1 36 14 sep 14.15 db2psmds -> /opt/ibm/db2/V11.5/function/db2psmds*
lrwxrwxrwx. 1 root db2iadm1 35 14 sep 14.15 db2rtsc -> /opt/ibm/db2/V11.5/function/db2rtsc*
lrwxrwxrwx. 1 root db2iadm1 34 14 sep 14.15 fpeevm -> /opt/ibm/db2/V11.5/function/fpeevm*
drwxrwxr-x. 3 db2inst1 db2iadm1 22 1 mar 2021 jar/
lrwxrwxrwx. 1 root db2iadm1 37 14 sep 14.15 libdb2u.a -> /opt/ibm/db2/V11.5/function/libdb2u.a*
drwxrwsr-t. 2 db2inst1 db2iadm1 6 23 feb 2021 routine/
lrwxrwxrwx. 1 root db2iadm1 33 14 sep 14.15 tblpd -> /opt/ibm/db2/V11.5/function/tblpd*
drwxrwsr-t. 2 db2inst1 db2iadm1 37 14 sep 14.15 unfenced/
sqllib/function/jar:
totalt 0
drwxrwxr-x. 2 db2inst1 db2iadm1 28 13 jan 09.48 DB2INST1/
sqllib/function/jar/DB2INST1:
totalt 12
-rw-rw-r--. 1 db2inst1 db2iadm1 8934 13 jan 09.48 STRINGUTIL.jar
sqllib/function/routine:
totalt 0
sqllib/function/unfenced:
totalt 0
lrwxrwxrwx. 1 root db2iadm1 44 14 sep 14.15 asnqmon -> /opt/ibm/db2/V11.5/function/unfenced/asnqmon*
lrwxrwxrwx. 1 root db2iadm1 45 14 sep 14.15 db2gsead -> /opt/ibm/db2/V11.5/function/unfenced/db2gsead*
我想我已经找到了导致问题的原因，至少我现在可以毫无问题地创建函数了。根本原因是 Flyway 似乎：
SET CURRENT_SCHEMA = <variable assigned via property -schemas>
当实例所有者更改此设置时，db2 将无法找到 jar 文件。如果我将迁移更改为：
set CURRENT SCHEMA = 'DB2INST1' @
CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11))
RETURNS INTEGER
RETURNS NULL ON NULL INPUT
FENCED THREADSAFE DETERMINISTIC
NO SQL
LANGUAGE JAVA
PARAMETER STYLE JAVA
EXTERNAL NAME 'STRINGUTIL:se.uhr.nya.commons.db.procedures.Proquint!quint2uint'
NO EXTERNAL ACTION @
一切都按预期进行。我对必须在迁移中设置 current_path 并不感到兴奋（而且我不确定它会对 Flyway 产生什么影响），所以我会看看是否有另一个属性可用于分配模式对于 FLYWAY_SCHEMA_HISTORY。但这目前有效。
编辑：
如果我删除 -schemas 作为 Flyway 的参数，以下迁移将起作用：
--#SET TERMINATOR @
values ('CURRENT SCHEMA', cast(CURRENT SCHEMA as varchar(100))) @
CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11)) RETURNS INTEGER RETURNS NULL ON NULL INPUT FENCED THREADSAFE DETERMINISTIC NO SQL LANGUAGE JAVA PARAMETER STYLE JAVA EXTERNAL NAME 'STRINGUTIL:se.uhr.nya.commons.db.procedures.Proquint!quint2uint' NO EXTERNAL ACTION @
values NYA.QUINT_2_UINT('aabbccddeef') @
flyway -table="FLYWAY_SCHEMA_HISTORY" -driver=${driver} -url=jdbc:db2://${host}:${port}/${db} -user=${username} -password=${passwd} -jarDirs=${jarDirs} -locations="filesystem:${upgradedir}" migrate
Flyway is up to date
Flyway Community Edition 8.4.1 by Redgate
Database: jdbc:db2://130.239.91.235:50000/nyax (DB2/LINUXX8664 11.5)
----------------------------------------
Flyway Teams features are enabled by default for the next 27 days. Learn more at https://rd.gt/3A4IWym
----------------------------------------
Successfully validated 1 migration (execution time 00:00.017s)
Creating Schema History table "DB2INST1"."FLYWAY_SCHEMA_HISTORY" ...
Current version of schema "DB2INST1": << Empty Schema >>
Migrating schema "DB2INST1" to version "22.223.100.4"
+----------------+----------+
| 1 | 2 |
+----------------+----------+
| CURRENT SCHEMA | DB2INST1 |
+----------------+----------+
+-----+
| 1 |
+-----+
| 274 |
+-----+
如果我添加特定架构，如下所示：
flyway -schemas=NYA_FLYWAY -table="FLYWAY_SCHEMA_HISTORY" -driver=${driver} -url=jdbc:db2://${host}:${port}/${db} -user=${username} -password=${passwd} -jarDirs=${jarDirs} -locations="filesystem:${upgradedir}" migrate
Flyway is up to date
Flyway Community Edition 8.4.1 by Redgate
Database: jdbc:db2://130.239.91.235:50000/nyax (DB2/LINUXX8664 11.5)
----------------------------------------
Flyway Teams features are enabled by default for the next 27 days. Learn more at https://rd.gt/3A4IWym
----------------------------------------
Creating schema "NYA_FLYWAY" ...
Creating Schema History table "NYA_FLYWAY"."FLYWAY_SCHEMA_HISTORY" ...
Current version of schema "NYA_FLYWAY": null
Migrating schema "NYA_FLYWAY" to version "22.223.100.4"
+----------------+------------+
| 1 | 2 |
+----------------+------------+
| CURRENT SCHEMA | NYA_FLYWAY |
+----------------+------------+
ERROR: Migration of schema "NYA_FLYWAY" to version "22.223.100.4" failed! Changes successfully rolled back.
CURRENT_SCHEMA 更改为 NYA_FLYWAY，我认为这就是 Db2 无法找到 jar 文件的原因。如果我在迁移中显式设置 CURRENT_SCHEMA：
--#SET TERMINATOR @
set CURRENT_SCHEMA = 'DB2INST1' @
values ('CURRENT SCHEMA', cast(CURRENT SCHEMA as varchar(100))) @
...
它再次按预期工作：
flyway -schemas=NYA_FLYWAY -table="FLYWAY_SCHEMA_HISTORY" -driver=${driver} -url=jdbc:db2://${host}:${port}/${db} -user=${username} -password=${passwd} -jarDirs=${jarDirs} -locations="filesystem:${upgradedir}" migrate
Flyway is up to date
Flyway Community Edition 8.4.1 by Redgate
Database: jdbc:db2://130.239.91.235:50000/nyax (DB2/LINUXX8664 11.5)
----------------------------------------
Flyway Teams features are enabled by default for the next 27 days. Learn more at https://rd.gt/3A4IWym
----------------------------------------
Successfully validated 2 migrations (execution time 00:00.018s)
Current version of schema "NYA_FLYWAY": null
Migrating schema "NYA_FLYWAY" to version "22.223.100.4"
+----------------+----------+
| 1 | 2 |
+----------------+----------+
| CURRENT SCHEMA | DB2INST1 |
+----------------+----------+
+-----+
| 1 |
+-----+
| 274 |
+-----+
另外，如果我更改我的小测试程序，以便在创建函数之前将 current_schema 设置为“NYA_FLYWAY”，我会收到相同的错误：
java -cp .:/home/lejo0004/db2jcc4.jar tst //nya-03.its.umu.se:50000/nyax db2inst1 $passwd
**** Enter class tst
**** Loaded the JDBC driver
**** Created a JDBC connection to the data source
**** Created JDBC Statement object
CURRENT SCHEMA = NYA_FLYWAY
SQLException information
Error msg: DB2 SQL Error: SQLCODE=-20204, SQLSTATE=46008, SQLERRMC=NYA.QUINT_2_UINT, DRIVER=4.29.24
SQLSTATE: 46008
Error code: -20204
com.ibm.db2.jcc.am.SqlException: DB2 SQL Error: SQLCODE=-20204, SQLSTATE=46008, SQLERRMC=NYA.QUINT_2_UINT, DRIVER=4.29.24
at com.ibm.db2.jcc.am.b7.a(b7.java:815)
at com.ibm.db2.jcc.am.b7.a(b7.java:66)
at com.ibm.db2.jcc.am.b7.a(b7.java:140)
at com.ibm.db2.jcc.am.k9.c(k9.java:2844)
at com.ibm.db2.jcc.am.k9.d(k9.java:2828)
at com.ibm.db2.jcc.am.k9.b(k9.java:2188)
at com.ibm.db2.jcc.t4.ab.k(ab.java:444)
at com.ibm.db2.jcc.t4.ab.c(ab.java:102)
at com.ibm.db2.jcc.t4.p.b(p.java:38)
at com.ibm.db2.jcc.t4.av.h(av.java:124)
at com.ibm.db2.jcc.am.k9.ak(k9.java:2183)
at com.ibm.db2.jcc.am.k9.a(k9.java:3387)
at com.ibm.db2.jcc.am.k9.e(k9.java:1135)
at com.ibm.db2.jcc.am.k9.execute(k9.java:1114)
at tst.main(tst.java:61)
FWIW，这也可以通过 clp 重现：
[db2inst1@nya-03 ~]$ db2 "set current_schema = 'DB2INST1'"
DB20000I The SQL command completed successfully.
[db2inst1@nya-03 ~]$ db2 "CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11))
RETURNS INTEGER
RETURNS NULL ON NULL INPUT
FENCED THREADSAFE
DETERMINISTIC
NO SQL
LANGUAGE JAVA
PARAMETER STYLE JAVA
EXTERNAL NAME
'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint'
NO EXTERNAL ACTION"
DB20000I The SQL command completed successfully.
[db2inst1@nya-03 ~]$ db2 "set current_schema = 'NYA_FLYWAY'"
DB20000I The SQL command completed successfully.
[db2inst1@nya-03 ~]$ db2 "CREATE OR REPLACE FUNCTION NYA.QUINT_2_UINT( I VARCHAR(11))
RETURNS INTEGER
RETURNS NULL ON NULL INPUT
FENCED THREADSAFE
DETERMINISTIC
NO SQL
LANGUAGE JAVA
PARAMETER STYLE JAVA
EXTERNAL NAME
'StringUtil:se.uhr.nya.commons.db.procedures.Proquint!quint2uint'
NO EXTERNAL ACTION"
DB21034E The command was processed as an SQL statement because it was not a
valid Command Line Processor command. During SQL processing it returned:
SQL20204N The user defined function or procedure "NYA.QUINT_2_UINT" was
unable to map to a single Java method. LINE NUMBER=10. SQLSTATE=46008
有人可能会问为什么我坚持为flyway设置模式和表。至于表名，原因是 Flyway 以其他方式使用小写的带引号标识符创建它们。每次需要查询表时（尤其是从 sh 查询表时）都必须引用这些标识符是一种痛苦的经历。不幸的是，我还没有找到一种方法来影响 Flyway 在涉及列名称时的行为，因此您仍然需要引用它们，如下所示：
db2 "select \"version\" from ..."
我尝试手动创建表，但flyway无法处理它。我还没有尝试过，但我可能会为此目的添加生成的列或视图。
至于模式名称，我有几个运行自己的 Flyway 实例的产品。对于他们的实例使用模式+“_FLYWAY”感觉更容易。我不想将 Flyway 表放入产品架构中，因为我在每个提交的版本之前都在架构上运行验证脚本。
我还想补充一点，我只在 Flyway Community 8.4.1 上尝试过此操作，我开始使用的 Flyway Community 8.0.5 可能存在其他一些错误
非常感谢mao和Mark的输入（这可能会被删除，但现在我已经添加了:-)
编辑：我最终将其添加到 beforeEachMigrate.sql 中：
--#SET TERMINATOR @
SET CURRENT_SCHEMA = CURRENT_USER @
在执行每个迁移文件之前，flyway会自动调用此文件。