>>Alexander Farber wrote on Wednesday, March 09, 2016 4:11 AM
Hello fellow PostgreSQL users,
what is please the most efficient way to delete a slice from the start of a
longer array (after I have copied it to another array)?
Do I really have to copy a large slice of the array to itself, like in the last
line here:
pile_array := pile_array || swap_array;
/* here I copy away swap_len elements */
new_hand := pile_array[1:swap_len];
/* here I don't know how to efficiently remove already copied elements
*/
pile_array := pile_array[(swap_len + 1):ARRAY_LENGTH(pile_array, 1)];
or is there a better way?
Thank you
Alex
<<
Have you considered a normal (relational), non-array-based data model for this
app (2 or 3 tables in a 1:M/M:M) instead of the single table model you’ve
shown? That would then allow you to use normal sql set-based operations that
are readable, understandable, maintainable and very fast/scalable.
When I see row by row operations (looping or cursors) in what should be a real
time query…that’s my alarm bell that perhaps the code has wandered off a valid
solution path.
Mike
