diff options
Diffstat (limited to 'contrib/btree_gist/btree_cash.c')
| -rw-r--r-- | contrib/btree_gist/btree_cash.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_cash.c b/contrib/btree_gist/btree_cash.c new file mode 100644 index 00000000000..feadd7a73e4 --- /dev/null +++ b/contrib/btree_gist/btree_cash.c @@ -0,0 +1,163 @@ +#include "btree_gist.h" +#include "btree_utils_num.h" +#include "utils/cash.h" + +typedef struct +{ + Cash lower; + Cash upper; +} cashKEY; + +/* +** Cash ops +*/ +PG_FUNCTION_INFO_V1(gbt_cash_compress); +PG_FUNCTION_INFO_V1(gbt_cash_union); +PG_FUNCTION_INFO_V1(gbt_cash_picksplit); +PG_FUNCTION_INFO_V1(gbt_cash_consistent); +PG_FUNCTION_INFO_V1(gbt_cash_penalty); +PG_FUNCTION_INFO_V1(gbt_cash_same); + +Datum gbt_cash_compress(PG_FUNCTION_ARGS); +Datum gbt_cash_union(PG_FUNCTION_ARGS); +Datum gbt_cash_picksplit(PG_FUNCTION_ARGS); +Datum gbt_cash_consistent(PG_FUNCTION_ARGS); +Datum gbt_cash_penalty(PG_FUNCTION_ARGS); +Datum gbt_cash_same(PG_FUNCTION_ARGS); + +static bool gbt_cashgt (const void *a, const void *b) +{ + return ( *((Cash*)a) > *((Cash*)b) ); +} +static bool gbt_cashge (const void *a, const void *b) +{ + return ( *((Cash*)a) >= *((Cash*)b) ); +} +static bool gbt_casheq (const void *a, const void *b) +{ + return ( *((Cash*)a) == *((Cash*)b) ); +} +static bool gbt_cashle (const void *a, const void *b) +{ + return ( *((Cash*)a) <= *((Cash*)b) ); +} +static bool gbt_cashlt (const void *a, const void *b) +{ + return ( *((Cash*)a) < *((Cash*)b) ); +} + +static int +gbt_cashkey_cmp(const void *a, const void *b) +{ + + if ( *(Cash*)&(((Nsrt *) a)->t[0]) > *(Cash*)&(((Nsrt *) b)->t[0]) ){ + return 1; + } else + if ( *(Cash*)&(((Nsrt *) a)->t[0]) < *(Cash*)&(((Nsrt *) b)->t[0]) ){ + return -1; + } + return 0; + +} + + +static const gbtree_ninfo tinfo = +{ + gbt_t_cash, + sizeof(Cash), + gbt_cashgt, + gbt_cashge, + gbt_casheq, + gbt_cashle, + gbt_cashlt, + gbt_cashkey_cmp +}; + + +/************************************************** + * Cash ops + **************************************************/ + + +Datum +gbt_cash_compress(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + GISTENTRY *retval = NULL; + PG_RETURN_POINTER( gbt_num_compress( retval , entry , &tinfo )); +} + + +Datum +gbt_cash_consistent(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + Cash query = (*((Cash *) PG_GETARG_POINTER(1))); + cashKEY *kkk = (cashKEY *) DatumGetPointer(entry->key); + GBT_NUMKEY_R key ; + StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2); + key.lower = (GBT_NUMKEY*) &kkk->lower ; + key.upper = (GBT_NUMKEY*) &kkk->upper ; + + PG_RETURN_BOOL( + gbt_num_consistent( &key, (void*)&query,&strategy,GIST_LEAF(entry),&tinfo) + ); +} + + +Datum +gbt_cash_union(PG_FUNCTION_ARGS) +{ + GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0); + void *out = palloc(sizeof(cashKEY)); + *(int *) PG_GETARG_POINTER(1) = sizeof(cashKEY); + PG_RETURN_POINTER( gbt_num_union ( (void*)out, entryvec, &tinfo ) ); +} + + +Datum +gbt_cash_penalty(PG_FUNCTION_ARGS) +{ + cashKEY *origentry = (cashKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key); + cashKEY *newentry = (cashKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key); + float *result = (float *) PG_GETARG_POINTER(2); + + Cash res ; + + *result = 0.0; + + res = Max(newentry->upper - origentry->upper, 0) + + Max(origentry->lower - newentry->lower, 0); + + if ( res > 0 ){ + *result += FLT_MIN ; + *result += (float) ( res / ( (double) ( res + origentry->upper - origentry->lower ) ) ); + *result *= ( FLT_MAX / ( ( (GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1 ) ); + } + + PG_RETURN_POINTER(result); + +} + +Datum +gbt_cash_picksplit(PG_FUNCTION_ARGS) +{ + PG_RETURN_POINTER(gbt_num_picksplit( + (GistEntryVector *) PG_GETARG_POINTER(0), + (GIST_SPLITVEC *) PG_GETARG_POINTER(1), + &tinfo + )); +} + +Datum +gbt_cash_same(PG_FUNCTION_ARGS) +{ + cashKEY *b1 = (cashKEY *) PG_GETARG_POINTER(0); + cashKEY *b2 = (cashKEY *) PG_GETARG_POINTER(1); + bool *result = (bool *) PG_GETARG_POINTER(2); + + *result = gbt_num_same ( (void*)b1, (void*)b2, &tinfo ); + PG_RETURN_POINTER(result); +} + + |