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repos_util
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libpq_test
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include
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server
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executor
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nodeHash.h

nodeHash.h 1.9 KB
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  1. /*-------------------------------------------------------------------------
    2. 

  2.  *
    3. 

  3.  * nodeHash.h
    4. 

  4.  *	  prototypes for nodeHash.c
    5. 

  5.  *
    6. 

  6.  *
    7. 

  7.  * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
    8. 

  8.  * Portions Copyright (c) 1994, Regents of the University of California
    9. 

  9.  *
    10. 

  10.  * src/include/executor/nodeHash.h
    11. 

  11.  *
    12. 

  12.  *-------------------------------------------------------------------------
    13. 

  13.  */
    14. 

  14. #ifndef NODEHASH_H
    15. 

  15. #define NODEHASH_H
    16. 

  16. 

  17. #include "nodes/execnodes.h"
    18. 

  18. 

  19. extern HashState *ExecInitHash(Hash *node, EState *estate, int eflags);
    20. 

  20. extern TupleTableSlot *ExecHash(HashState *node);
    21. 

  21. extern Node *MultiExecHash(HashState *node);
    22. 

  22. extern void ExecEndHash(HashState *node);
    23. 

  23. extern void ExecReScanHash(HashState *node);
    24. 

  24. 

  25. extern HashJoinTable ExecHashTableCreate(Hash *node, List *hashOperators,
    26. 

  26. 					bool keepNulls);
    27. 

  27. extern void ExecHashTableDestroy(HashJoinTable hashtable);
    28. 

  28. extern void ExecHashTableInsert(HashJoinTable hashtable,
    29. 

  29. 					TupleTableSlot *slot,
    30. 

  30. 					uint32 hashvalue);
    31. 

  31. extern bool ExecHashGetHashValue(HashJoinTable hashtable,
    32. 

  32. 					 ExprContext *econtext,
    33. 

  33. 					 List *hashkeys,
    34. 

  34. 					 bool outer_tuple,
    35. 

  35. 					 bool keep_nulls,
    36. 

  36. 					 uint32 *hashvalue);
    37. 

  37. extern void ExecHashGetBucketAndBatch(HashJoinTable hashtable,
    38. 

  38. 						  uint32 hashvalue,
    39. 

  39. 						  int *bucketno,
    40. 

  40. 						  int *batchno);
    41. 

  41. extern bool ExecScanHashBucket(HashJoinState *hjstate, ExprContext *econtext);
    42. 

  42. extern void ExecPrepHashTableForUnmatched(HashJoinState *hjstate);
    43. 

  43. extern bool ExecScanHashTableForUnmatched(HashJoinState *hjstate,
    44. 

  44. 							  ExprContext *econtext);
    45. 

  45. extern void ExecHashTableReset(HashJoinTable hashtable);
    46. 

  46. extern void ExecHashTableResetMatchFlags(HashJoinTable hashtable);
    47. 

  47. extern void ExecChooseHashTableSize(double ntuples, int tupwidth, bool useskew,
    48. 

  48. 						int *numbuckets,
    49. 

  49. 						int *numbatches,
    50. 

  50. 						int *num_skew_mcvs);
    51. 

  51. extern int	ExecHashGetSkewBucket(HashJoinTable hashtable, uint32 hashvalue);
    52. 

  52. 

  53. #endif   /* NODEHASH_H */
    54.