Hi,
I need to store a lot of 3-tuples of words (e.g. "he", "can",
"drink"), order matters!
The source is about 4 GB of these 3-tuples.
I need to store them in a table and check whether one of them is
already stored, and if that's the case to increment a column named
"count" (or something).
I thought of doing all the inserts without having an index and without
doing the check whether the row is already there. After that I'd do a
"group by" and count(*) on that table. Is this a good idea?
I don't know much about Pgs data types. I'd try to use the varchar
type. But maybe there is a better data type?
What kind of index should I use?
This is for a scientific research.
Thanks in advance
moritz
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
