On 2/15/2012 8:16 AM, Robert James wrote:
A table has a column "obj_type" which has very low selectivity (let's
say 5 choices, with the top choice making up 50% of records). Is
there any sense in indexing that column? B-trees won't be that useful,
and the docs discourage other index types/
It
A table has a column "obj_type" which has very low selectivity (let's
say 5 choices, with the top choice making up 50% of records). Is
there any sense in indexing that column? B-trees won't be that useful,
and the docs discourage other index types/
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