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drizzled/unique.h
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   memory simultaneously with iteration, so it should be ~2-3x faster.
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 */
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namespace drizzled
 
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{
 
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namespace internal
 
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{
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typedef struct st_io_cache IO_CACHE;
 
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}
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class Unique :public drizzled::memory::SqlAlloc
 
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class Unique : public memory::SqlAlloc
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{
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  DYNAMIC_ARRAY file_ptrs;
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  ulong max_elements;
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  size_t max_in_memory_size;
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  IO_CACHE *file;
 
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  internal::IO_CACHE *file;
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  TREE tree;
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  unsigned char *record_pointers;
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  bool flush();
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  friend int unique_write_to_ptrs(unsigned char* key, uint32_t count, Unique *unique);
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};
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} /* namespace drizzled */
 
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#endif /* DRIZZLED_UNIQUE_H */