On 6/15/21 1:55 PM, AI Rumman wrote:
I am using Postgresql 10 and seeing a strange behavior in CONCAT function when I am concatenating double precision and int with a separator.
select concat('41.1'::double precision,':', 20);
Result:
41.1000000000000014:20
Value 41.1 which double precision converts to 41.1000000014.
Is that expected?
Because of the well-known difficulty in precisely converting floating point to decimal, in cases like this, I always cast to NUMERIC of the desired precision. It's the COBOL programmer in me...
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