citusdata/postgresql-hll

View on GitHub

PostgreSQL extension adding HyperLogLog data structures as a native data type

Stars: 1.2k
Forks: 115
Open beginner issues: 0
Indexed issues: 51

Dominant language: C
License: Apache-2.0
Last GitHub push: Jun 2, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

51 open issues indexed

The `v2.21` tag exists but there is no corresponding GitHub Release entry with release notes or assets. Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

citusdata/postgresql-hll#181 · Opened Jun 22, 2026
Out-Of-Bound (OOB) Read Memory Issue in hll.c Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

citusdata/postgresql-hll#180 · Opened Jun 11, 2026
Add postgres19 compatibility Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

citusdata/postgresql-hll#171 · Opened Apr 22, 2026
Query Discrepancy in Postgres HLL Test Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

citusdata/postgresql-hll#158 · Opened Apr 28, 2024
Q: Evaluation cost of hll_empty() Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

citusdata/postgresql-hll#157 · 1 comment · 1 reaction · Opened Jan 29, 2024
Error installing on Windows 10 Pro Open

Difficulty 3/5 1-2 days Newbie friendliness 20/100

citusdata/postgresql-hll#156 · 1 comment · Opened Jan 17, 2024
Question : table consume disk space Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

citusdata/postgresql-hll#153 · 2 comments · Opened Oct 25, 2023
Blog link does not work Open

Difficulty 1/5 Under an hour Newbie friendliness 25/100

citusdata/postgresql-hll#152 · 5 comments · 1 reaction · Opened Oct 24, 2023
hll_hash_any() causes crash Open

bug Crash

Difficulty 3/5 1-2 days Newbie friendliness 35/100

citusdata/postgresql-hll#145 · 1 comment · Opened May 4, 2023
Cannot compile the extension Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

citusdata/postgresql-hll#140 · Opened Nov 28, 2022
Regression tests need updating for 2.17 Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

citusdata/postgresql-hll#138 · Opened Sep 21, 2022
Remove generated sql files for migration Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

citusdata/postgresql-hll#133 · Opened Aug 25, 2022
hll_add_agg() with FILTER and no input rows should return hll_empty() instead of NULL Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

citusdata/postgresql-hll#129 · Opened Jul 25, 2022
Feature Request: ARM64 Support Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

citusdata/postgresql-hll#127 · 2 reactions · Opened Jan 20, 2022
create postgresql-hll extension error on pgxl when create extension hll: ERROR: could not load library "xxxx"; xxxx hll.so:undefined symbol: table_open Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

citusdata/postgresql-hll#126 · Opened Nov 5, 2021
Build errors on PG 9.4.26 and 9.5.25 Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

citusdata/postgresql-hll#124 · Opened Sep 9, 2021
Aggregate function not parallelizable ? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

citusdata/postgresql-hll#120 · Opened Jun 3, 2021
Regression tests failing against v14 Open

Difficulty 3/5 1-2 days Newbie friendliness 32/100

citusdata/postgresql-hll#119 · Opened Jun 3, 2021
Blog links broken in "The importance of hashing" Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

citusdata/postgresql-hll#118 · Opened Apr 13, 2021
Release on the PostgreSQL Extension Network Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

citusdata/postgresql-hll#117 · Opened Apr 11, 2021
The documentation is missing an example of approximate count(distinct) Open

Difficulty 2/5 1-3 hours Newbie friendliness 50/100

citusdata/postgresql-hll#114 · Opened Dec 31, 2020
support to hash uuid ? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

citusdata/postgresql-hll#108 · Opened Sep 23, 2020
Failing to build on Mac OS X Catalina Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

citusdata/postgresql-hll#105 · Opened Aug 1, 2020
link broken Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

citusdata/postgresql-hll#104 · Opened Jul 31, 2020
Is added before? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

citusdata/postgresql-hll#103 · Opened Jul 7, 2020
Failed to read spec file from postgresql11-hll-2.12.tar.gz Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

citusdata/postgresql-hll#102 · 3 comments · Opened Jun 7, 2020
Update README installation steps Open

Difficulty 2/5 1-2 days Newbie friendliness 45/100

citusdata/postgresql-hll#101 · Opened Jun 2, 2020
Python Library also available. Open

Difficulty 1/5 Under an hour Newbie friendliness 35/100

citusdata/postgresql-hll#100 · 1 reaction · Opened May 27, 2020
Calculating New Daily Users Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

citusdata/postgresql-hll#99 · Opened May 21, 2020
Domain linked to in repo description leads to an empty page Open

Difficulty 1/5 Under an hour Newbie friendliness 42/100

citusdata/postgresql-hll#97 · Opened Jan 28, 2020
hll_out produces different results for the same value Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

citusdata/postgresql-hll#93 · 1 reaction · Opened Dec 12, 2019
Memory usage 100X what it should be for HashAgg Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

citusdata/postgresql-hll#92 · 4 reactions · Opened Dec 12, 2019
segfault in hll_add_agg Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

citusdata/postgresql-hll#91 · 1 comment · Opened Dec 2, 2019
Hll out of memory error Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

citusdata/postgresql-hll#90 · 1 comment · 3 reactions · Opened Nov 29, 2019
Update Readme with recent versions Open

citusdata/postgresql-hll#89 · 1 assignee · Opened Nov 15, 2019
Frequent HLL bitstream_unpack crashes Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

citusdata/postgresql-hll#84 · 1 comment · Opened Nov 6, 2019
Getting ERROR: explicit multiset too large Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

citusdata/postgresql-hll#81 · Opened Sep 18, 2019
"could not identify an equality operator for type hll" in GROUP BY Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

citusdata/postgresql-hll#80 · 4 comments · 4 reactions · Opened Sep 12, 2019
Support for adding pre-computed HLL entries into an HLL table Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

citusdata/postgresql-hll#74 · 2 comments · 2 reactions · Opened Jun 15, 2019
Will fix the error when compiler hll into greenplum 5.x in arm server ? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

citusdata/postgresql-hll#72 · 1 reaction · Opened May 30, 2019
Build problems on Mac OSX Mojave Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

citusdata/postgresql-hll#68 · Opened Mar 20, 2019
Windows support Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

citusdata/postgresql-hll#66 · 1 comment · Opened Jan 16, 2019
Cardinality is coming off by 2 percent (o_log2m=17, o_regwidth=5, o_expthresh=-1,o_sparseon=1) Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

citusdata/postgresql-hll#60 · Opened Sep 18, 2018
hll is incompatible with 32 bit systems: internal size 8 is invalid for passed-by-value type Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

citusdata/postgresql-hll#45 · 1 comment · Opened Apr 7, 2018
Relocatable support Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

citusdata/postgresql-hll#34 · 1 reaction · Opened Apr 16, 2016
hll_add multiple values Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

citusdata/postgresql-hll#33 · 4 reactions · Opened Feb 25, 2016
effective MAX regwidth is inconsistent with storage spec and java-hll Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

citusdata/postgresql-hll#30 · 1 comment · Opened May 2, 2015
add hll_cardinality_agg() Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

citusdata/postgresql-hll#22 · 1 comment · Opened Sep 24, 2014
Implement hll_hash_date Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

citusdata/postgresql-hll#21 · 1 comment · Opened Sep 24, 2014
Using hll_cardinality(hll_union_agg(users)) with OVER partition by Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

citusdata/postgresql-hll#19 · 2 comments · 1 reaction · Opened Sep 10, 2014

citusdata/postgresql-hll

Get new issues in your inbox