Add bit_count SQL function This function for bit and bytea counts the set bits in the bit or byte string. Internally, we use the existing popcount functionality.
For the name, after some discussion, we settled on bit_count, which also exists with this meaning in MySQL, Java, and Python. Author: David Fetter <[email protected]> Discussion: https://www.postgresql.org/message-id/flat/[email protected] Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/a6715af1e72da289474011be1e2d536f991eda34 Modified Files -------------- doc/src/sgml/func.sgml | 40 +++++++++++++++++++++++++++++++++++ src/backend/utils/adt/varbit.c | 14 ++++++++++++ src/backend/utils/adt/varlena.c | 11 ++++++++++ src/include/catalog/catversion.h | 2 +- src/include/catalog/pg_proc.dat | 6 ++++++ src/test/regress/expected/bit.out | 13 ++++++++++++ src/test/regress/expected/strings.out | 6 ++++++ src/test/regress/sql/bit.sql | 4 ++++ src/test/regress/sql/strings.sql | 2 ++ 9 files changed, 97 insertions(+), 1 deletion(-)
