CASE statement advice needed

It appears that this query goes into an endless loop. Can someone please identify the error? The 4 tables referenced (CPADF_DT , CPACCDEF , CPARTY, CPDELACC) have less that 2000 records each.

--CP BANK ACCOUNT DEFAULTS
SELECT
CPARTY.NAME AS "COUNTERPARTY" ,
CPACCDEF.TRANS_TYPE AS "TRANSACTION TYPE",
CPACCDEF.SECTYPE AS "INSTRUMENT TYPE",
CPACCDEF.ENTITY AS "ENTITY",
CPACCDEF.FACILITY AS "RELATIONSHIP",
CPACCDEF.CFLOW_TYPE AS "CASHFLOW TYPE",
CPACCDEF.CCY AS "CURRENCY",
CASE CPACCDEF.PAY_REC
WHEN 'B' THEN 'BOTH'
WHEN 'P' THEN 'PAYMENTS'
WHEN 'R' THEN 'RECEIPTS'
ELSE
CPACCDEF.PAY_REC END AS "PAYMENTS/RECEIPTS",
CPADF_DT.EFFECT_DT AS "EFFECTIVE DATE",
CPADF_DT.ACC_NO AS "ACCOUNT NUMBER / IDENTIFIER",
CPDELACC.ACC_NAME AS "ACCOUNT NAME/PAYMENT METHOD", CPDELACC.CCY AS "CURRENCY",
CPDELACC.BANK_NAME AS "BANK NAME"
FROM CPADF_DT , CPACCDEF , CPARTY, CPDELACCHey first of all the join happening here is cross join and hence it will result in the cartesian product of all the 4 tables and I don't think it is the intended behavior.

there should be some joining condition between the tables.

finally it is recommended to use aliases for the tables in the join so that query looks good :)|||Hi,

I think its not going into an endless loop. The thing is that, since no join condition is provided it will be a cartesian product and if there are lot of rows in each of the tables it will take a lot of time to execute the above query.

The solution to ur problem is that have join conditions so that you filter out unwanted rows.sql