PB 问题。dec变量无法用select into 取到值

Question

帮朋友改PB6.5的程序，却碰到了一个好奇怪的问题 ！
代码里面的SELECT 语句，变量为decimal类型的，select into 无法取到值，而把dec类型改成double就没有问题。有人知道什么原因么？
运行环境：win7+pb6.5+sql2008r2

TRANSACTION SQLTMP
SQLTMP = CREATE TRANSACTION
SQLTMP.DBMS = "MSS Microsoft SQL Server 6.x"
SQLTMP.Database = "main"
SQLTMP.LogPass = "123"
SQLTMP.ServerName = "AHONGER-PC\SQLEXPRESS"
SQLTMP.LogId = "sa"
SQLTMP.AutoCommit = False
SQLTMP.DBParm = ""
CONNECT USING SQLTMP;
IF SQLTMP.SQLCODE=0 THEN
    DEC LDC_PAY
    //这里改成double ldc_pay就能够取到金额，dec就不行。
    SELECT SUM(JE)
    INTO :LDC_PAY
    FROM zy_fyjs_sffl
    WHERE jszs='0000' and
        jfzyh='00000017' and
        jfryzs='01' and
        xm='05' using sqltmp;
    MESSAGEBOX('LDC_PAY',LDC_PAY)
ELSE
    MESSAGEBOX('ERROR','CONNECT ERROR')
END IF
DISCONNECT USING SQLTMP;

Answer 1

没有人知道么，请回答啊~搞了好几天了都没有整明白这事