How to use Decode with a variable
Maybe you've seen this done.
I want to take statement strMenu4 and subtract the previous value
that is stored in an array as shown in strMenu5.
My problem is this change as shown in strMenu5 produces
an error code:
ORA-00904 invalid column name
So either I'm coding something wrong or it can't be done within the
SUM(decode) construct. If I replace the variable with a literal
like 1000 the code works:
SUM(decode(name,'DBWR lru scans', c1.value) - 1000) DBWR_lru_scans
but with an array variable or even a constant the code fails:
SUM(decode(name,'DBWR lru scans', c1.value) - Array(3)) DBWR_lru_scans, "
Any ideas how I can use Decode with a variable and not have it interrupt it
as a invalid column name?
Thanks,
Joseph Karpinski
[email protected]
[email protected]
strMenu4 = "SELECT d1.instance, " _
& " to_char(sysdate, 'dd-mon-yy hh24:mi:ss') start_time, " _
& " SUM(decode(name,'DBWR buffers scanned', c1.value)) DBWR_buffers_scanned, " _
& " SUM(decode(name,'DBWR lru scans', c1.value)) DBWR_lru_scans, " _
& " SUM(decode(name,'db block gets', c1.value)) db_block_gets , " _
& " SUM(decode(name,'consistent gets', c1.value)) consistent_gets , " _
& " SUM(decode(name,'physical reads', c1.value)) physical_reads " _
& " from dual, v$sysstat c1, v$thread d1 " _
& " group by d1.instance "
strMenu5 = "SELECT d1.instance, " _
& " to_char(sysdate, 'dd-mon-yy hh24:mi:ss') start_time, " _
& " SUM(decode(name,'DBWR buffers scanned', c1.value) - Array(2)) DBWR_buffers_scanned, " _
& " SUM(decode(name,'DBWR lru scans', c1.value) - Array(3)) DBWR_lru_scans, " _
& " SUM(decode(name,'db block gets', c1.value) - Array(4)) db_block_gets , " _
& " SUM(decode(name,'consistent gets', c1.value) - Array(5)) consistent_gets , " _
& " SUM(decode(name,'physical reads', c1.value) - Array(6)) physical_reads " _
& " from dual, v$sysstat c1, v$thread d1 " _
& " group by d1.instance "
Re-posting in the SQL and PL/SQL forum.
It's more appropriate.
Thanks,
Closing
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how to use decode
var_decode := 'decode'||'('|| var1 ||','|| -800000000000000||','||'.A'||','||
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regards/kumar
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2 (state VARCHAR2 (2))
3 /
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3 /
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3 /
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3 /
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2 (PERIOD VARCHAR2 (50) PRIMARY KEY)
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9 /
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2 AS
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30 /
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2 CURSOR c_period
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7 v_delimiter VARCHAR2 (1) := NULL;
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27 /
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