On 1/4/19 2:21 PM, Ken Tanzer wrote:
Hi.  I've got a text field in a table that holds this style of timestamp:

2014-10-23T00:00:00

I'd like to be able to create an index on the date portion of this field (as a date), because I have lots of queries that are searching for particular dates or ranges.

I've tried various ways of getting to a date (::date, LEFT(x,10)::date, etc.), but all of them throw the error "functions in index expression must be marked IMMUTABLE."

?:
'2014-10-23T00:00:00'::timestamp

Can you also show the actual index expression?


Is there any way, hacky or otherwise, people know of to do this?  Thanks in advance.

Ken


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