Dear Developers,
I would like to suggest the inclusion of an extension
in PostgreSQL. There are instances, I found, when one
needs to INSERT several times the same record in a
table. The front-end application can do it easy in a
loop of a sort, but on remote servers (and that's the
norm these days) it creates unnecessary network
traffic.
My suggestion is to allow INSERT to do it REPEAT x.
This should allow, in my view, the followings:
a) INSERT INTO my_table (field1, field2, field3)
VALUES (value1, value2, value3) REPEAT 5;
should insert 5 identical rows
b) INSERT INTO my_table (field1, field2, field3)
VALUES (x, value2/x, value3) REPEAT (x=3);
should insert the followings:
1, value2, value3
2, value2/2, value3
3, value2/3, value3
In other words, this form of INSERT shold instruct the
SQL engine to perform a for loop. Maybe instead of
REPEAT there should be another word, maybe the for
loop should allow going with a different step than
the default one and go backward as well (easy to do
with a negative step).
This suggestion comes for a practical project that I
have.
I haven't feel the need for something like that in an
UPDATE, but I can imagine that it may happen:
UPDATE my_table SET field1=value1*x WHERE condition
REPEAT (x=(SELECT repetition FROM table2 WHERE
condition2) STEP -1.5);
Best regards,
Sorin Schwimmer
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