ERROR: more than one row returned by a subquery used as an expression

问题

I have searched and searched.. I have a bash script that is used to run a psql query and email the results on a daily basis. The DB does not update till midnight and my bash script passes a variable to the query for the day prior. I am getting this error only when I use the passed variable otherwise if I put the date in the query manually it runs fine. Not quite sure for I am still learning psql and bash.

Here is the bash script:

#!/bin/bash
NOWDATE=`date +%Y-%m-%d -d "yesterday"`
SUBDATE=`date '+%B %e, %G'`
DIR=/file/report/
FILE=file-$NOWDATE.csv
RECIPIENT=email@mail.com

PGPASSWORD=passwrod psql -w -h host -p 5432 -d database -U user -o $DIR/$FILE <<EOF
select distinct als."Table_AccountID",
   (select  "Table_val_AccountStatusID" from  "Table_log_AccountStatus"  
    where "Table_AccountID" = als."Table_AccountID" order by  "Date" desc limit 1)
    as "Table_val_AccountStatusID",

   CASE  
   when (select count(*) from  "Table_UsageHistory"  cfuh  
         where cfuh."Disk">'123456' and date_trunc('day',cfuh."Created") = date_trunc('day','$NOWDATE'::timestamp)
         -- -'1day':: interval
         and extrTable('day' from "Created"::timestamp) = ac."DesiredBillingDate" 
         and date_trunc('day', "Created"::timestamp) = date_trunc('day', '$NOWDATE'::timestamp)
         and cfuh."Table_AccountID" in (
             select distinct "Table_AccountID" from "Table_Usage" 
             where date_trunc('day', "Timestamp"::timestamp) = date_trunc('day','$NOWDATE'::timestamp)
             and "Table_AccountID" = cfuh."Table_AccountID")
         and cfuh."Table_AccountID" = als."Table_AccountID") >0
   then 'Y'
   else 'N'
   end as "RollUp",

   (select distinct bc."ID" from "BIL_BillableCharge" bc, "Table_UsageHistory" cfh 
    where date_trunc('day',bc."Date"::timestamp) = date_trunc('day',cfh."Created"::timestamp)
    and bc."Table_AccountID" = cfh."Table_AccountID" and bc."BIL_val_InvoiceItemTypeID" = '23' 
    and extrTable('month' from "Created"::timestamp) = extrTable('month' from '$NOWDATE'::timestamp)
    and  extrTable('year' from "Created"::timestamp) = extrTable('year' from '$NOWDATE'::timestamp)
    and cfh."Table_AccountID" = als."Table_AccountID") as "BillableChargeID"

    from "Table_log_AccountStatus" als, "Table_Account" ac
    group by als."Table_AccountID",  ac."ID", ac."DesiredBillingDate"
    having (select distinct "Disk" from "Table_UsageHistory" cfu
    where  date_trunc('day', cfu."Created") = date_trunc('day','$NOWDATE'::timestamp)
    and ac."ID" = cfu."Table_AccountID")>'123456'
    and extrTable('day' from '$NOWDATE'::timestamp) = ac."DesiredBillingDate"
    and ac."ID" = als."Table_AccountID"
    ORDER BY "RollUp" ASC
EOF

sed -i '2d' $DIR/$FILE |
   mailx -a $DIR/$FILE -s " Report for $SUBDATE" -r email@anotheremail.com $RECIPIENT

Here's the SQL, reformatted for readability.

select distinct 
  als."Table_AccountID",

  (select  "Table_val_AccountStatusID" 
   from  "Table_log_AccountStatus"  
   where "Table_AccountID" = als."Table_AccountID" 
   order by  "Date" desc limit 1) as "Table_val_AccountStatusID",

   CASE when 
        (select count(*) 
         from  "Table_UsageHistory"  cfuh  
         where  cfuh."Disk">'123456' 
           and date_trunc('day',cfuh."Created") = date_trunc('day','$NOWDATE'::timestamp) -- -'1day':: interval
           and extrTable('day' from "Created"::timestamp) = ac."DesiredBillingDate" 
           and date_trunc('day', "Created"::timestamp) = date_trunc('day', '$NOWDATE'::timestamp)
           and cfuh."Table_AccountID" in 
              (select distinct "Table_AccountID" 
               from "Table_Usage" 
               where date_trunc('day', "Timestamp"::timestamp) = date_trunc('day','$NOWDATE'::timestamp)
                 and "Table_AccountID" = cfuh."Table_AccountID")
                 and cfuh."Table_AccountID" = als."Table_AccountID") > 0
        then 'Y'
        else 'N'
   end as "RollUp",

  (select distinct bc."ID" 
   from "BIL_BillableCharge" bc, "Table_UsageHistory" cfh 
   where date_trunc('day',bc."Date"::timestamp) = date_trunc('day',cfh."Created"::timestamp)
     and bc."Table_AccountID" = cfh."Table_AccountID" and bc."BIL_val_InvoiceItemTypeID" = '23' 
     and extrTable('month' from "Created"::timestamp) = extrTable('month' from '$NOWDATE'::timestamp)
     and  extrTable('year' from "Created"::timestamp) = extrTable('year' from '$NOWDATE'::timestamp)
     and cfh."Table_AccountID" = als."Table_AccountID") as "BillableChargeID"

from "Table_log_AccountStatus" als, "Table_Account" ac
group by als."Table_AccountID",  ac."ID", ac."DesiredBillingDate"
having (select distinct "Disk" 
        from "Table_UsageHistory" cfu  
        where  date_trunc('day', cfu."Created") = date_trunc('day','$NOWDATE'::timestamp)
          and ac."ID" = cfu."Table_AccountID")>'123456'  
   and extrTable('day' from '$NOWDATE'::timestamp) = ac."DesiredBillingDate" 
   and ac."ID" = als."Table_AccountID"
 ORDER BY "RollUp" ASC

When ran just like this from command line on the server it spits out the error: ERROR: more than one row returned by a subquery used as an expression

I appreciate the help, this community is the best.. Sorry for the formatting, it came from the copy paste.

回答1:

When a subquery in the SELECT part, e.g., (SELECT a, b, (SELECT c from d ...)) of a query is used then this must return one value. An error is returned because one the subqueries returns more than one row. Check all the subqueries to ensure that these do not return more than one row. Add a LIMIT 1 clause if it is acceptable that more than one value exists, but only one is taken.

来源：https://stackoverflow.com/questions/8900774/error-more-than-one-row-returned-by-a-subquery-used-as-an-expression

标签

bash

postgresql

subquery

expression