Hello,
* On the size of arrays :
I did not find any info in the Docs on this.
How many bytes does an array take on disk ?My bet would be 4 bytes for number of dimensions, 4 per dimension for the length, and then the storage requirements of whatever's in the array.
If the array contains fixed size elements like integers, it'd be 4 bytes per element.
However if it contains variable length elements like text, is there a pointer table ? Or are the elements packed together ?
Is there any advantage in using a smallint[] over an integer[] ?
Does a smallint[] with 2 elements really take 12 bytes ?
* On Alignment :
The docs say fields are aligned on 4-bytes boundaries.
Does this mean that several consecutive smallint fields will take 4 bytes each ?
What about seleral consecutive "char" fields ?
I ask this because I'll have a lot of columns with small values to store in a table, and would like it to be small and to fit in the cache.
Thanks for any info.
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