pgsql: Use a hash table to store current sequence values.

Use a hash table to store current sequence values.

This speeds up nextval() and currval(), when you touch a lot of different
sequences in the same backend.

David Rowley

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/21025d4a5322307bcfef1222f497a3aacb2fc79a

Modified Files
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src/backend/commands/sequence.c |   71 +++++++++++++++++++--------------------
1 file changed, 35 insertions(+), 36 deletions(-)