On 3/20/20 11:34 AM, Matt Magoffin wrote:
On 21/03/2020, at 4:00 AM, Adrian Klaver <adrian.kla...@aklaver.com
<mailto:adrian.kla...@aklaver.com>> wrote:
On 3/20/20 2:17 AM, Matt Magoffin wrote:
Hello,
Indexes:
"da_datum_pkey" UNIQUE, btree (node_id, ts, source_id) CLUSTER,
tablespace "solarindex"
"da_datum_reverse_pkey" UNIQUE, btree (node_id, ts DESC,
source_id), tablespace "solarindex"
"da_datum_x_acc_idx" UNIQUE, btree (node_id, source_id, ts DESC,
jdata_a) WHERE jdata_a IS NOT NULL, tablespace "solarindex"
The error/query looks like:
ERROR: duplicate key value violates unique constraint
“_hyper_1_1931_chunk_da_datum_x_acc_idx"
What is the above index UNIQUE over?
What is da_datum_x_acc_idx index below indexed over?
The _hyper_1_1931_chunk_da_datum_x_acc_idx index has the same definition
as the da_datum_x_acc_idx above (it is defined on a child table). That
is, they are both essentially:
UNIQUE, btree (node_id, source_id, ts DESC, jdata_a) WHERE jdata_a IS
NOT NULL
The da_datum_pkey index is what the ON CONFLICT cause refers to, so
(node_id, ts, source_id) is UNIQUE as well.
Hmm, wonder if you are getting bit by this?:
https://www.postgresql.org/docs/12/sql-insert.html#SQL-ON-CONFLICT
"INSERT with an ON CONFLICT DO UPDATE clause is a “deterministic”
statement. This means that the command will not be allowed to affect any
single existing row more than once; a cardinality violation error will
be raised when this situation arises. Rows proposed for insertion should
not duplicate each other in terms of attributes constrained by an
arbiter index or constraint."
— m@
--
Adrian Klaver
adrian.kla...@aklaver.com
