BTEQ Teradata将查询变量传递给shell到脚本

Question

我是Teradata的新手。我的BTEQ计划有问题。 BTEQ作业传递变量shell脚本。程序的目的是检查摘要表中延迟2个月的任何空值。下面是该表的一个示例（程序的目的：当Summary表缺少两个月时，例如，Oct和Nov则flag = Y.flag = Y表示YES表示在Summary表中有空值十月和十一月.flag = N表示没有空值）：

 dt_load           maxmth       summary
  12-SEP            Sep          Sep
  13 SEP            Sep
  29-SEP            Sep 
  2-Oct             Oct
  3-Oct             Oct      
  1-Nov             Nov
  2-Nov             Nov    

user="usr1"
pass="pass1"
SRC_DB="emp"
SOURCE_TABLE="summarytb"

FLAG =$(query_td)

td_query () { bteq << EOF |grep '^>' |sed -e "s/^>//" 

${HOST}/${USER},${PASSWORD}
 DATABASE $SRC_DB;
 .set width 1000;
 .set titledashes off;

 SELECT COUNT(*) 
 FROM ${SRC_DB}.${SOURCE_TABLE};
 ( SELECT
     dt_load,
     summary ,
     maxmth,
  /*check for null 2 months back*/        
     MDIFF(summary, 2, maxmth, dt_load) AS diff1 
     FROM $SOURCE_TABLE
     Group by dt_load) AS a
     FROM 
   /*if summary field is null than insert 2*/ 
     ( SELECT *,
       COALESCE(a.diff1,2) AS diff (Select FROM a) AS  b
       FROM
  /* if diff= 2 than flag =Y else flag=N*/
     ( SELECT *,
       CASE
        When b.diff = 2  then  ‘Y ‘  ELSE  ‘N’
        End ) AS flag (SELECT c.diff FROM b) c
        FROM
   /*pass flag variable to shell script*/
         SELECT   '>'||' c.flag';
          $1
          .LOGOFF;
          .QUIT;
          .EXIT
           EOF
              }
          echo $FLAG

         if [ $FLAG='Y' ] then echo Run file1;
         exit 1
       fi
        IF [ $FLAG='N' ] then echo run file 2;
         exit 1
       fi