Lars Hofhansl created PHOENIX-3866:
--------------------------------------
Summary: COUNT(col) should scan along required column families only
Key: PHOENIX-3866
URL: https://issues.apache.org/jira/browse/PHOENIX-3866
Project: Phoenix
Issue Type: Bug
Reporter: Lars Hofhansl
These two should be equivalent:
{code}
0: jdbc:phoenix:localhost> select count(B.COLB) from test;
+----------------+
| COUNT(B.COLB) |
+----------------+
| 10054 |
+----------------+
1 row selected (9.446 seconds)
0: jdbc:phoenix:localhost> select count(B.COLB) from test where B.COLB is not
null;
+----------------+
| COUNT(B.COLB) |
+----------------+
| 10054 |
+----------------+
1 row selected (0.028 seconds)
{code}
Clearly the plain COUNT is doing unnecessary work.
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