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Add two HyperLogLog functions

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New functions initHyperLogLogError() and freeHyperLogLog() simplify
using this module from elsewhere.

Author: Tomáš Vondra
Review: Peter Geoghegan
This commit is contained in:
Alvaro Herrera
2016-01-19 17:40:15 -03:00
parent 9ff60273e3
commit 948c97958b
2 changed files with 49 additions and 1 deletions
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src/include/lib/hyperloglog.h
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@@ -60,8 +60,10 @@ typedef struct hyperLogLogState
} hyperLogLogState;
extern void initHyperLogLog(hyperLogLogState *cState, uint8 bwidth);
extern void initHyperLogLogError(hyperLogLogState *cState, double error);
extern void addHyperLogLog(hyperLogLogState *cState, uint32 hash);
extern double estimateHyperLogLog(hyperLogLogState *cState);
extern void mergeHyperLogLog(hyperLogLogState *cState, const hyperLogLogState *oState);
extern void freeHyperLogLog(hyperLogLogState *cState);
#endif /* HYPERLOGLOG_H */