68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
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/* Variable length key */
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typedef bytea GBT_VARKEY;
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/* Better readable key */
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typedef struct
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{
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bytea * lower, * upper;
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} GBT_VARKEY_R;
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/* used for key sorting */
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typedef struct
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{
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int i ;
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GBT_VARKEY * t ;
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} Vsrt ;
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/*
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type description
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*/
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typedef struct
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{
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/* Attribs */
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enum gbtree_type t ; /* data type */
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bool str ; /* true, if string ( else binary ) */
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bool trnc ; /* truncate (=compress) key */
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/* Methods */
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bool (*f_gt) ( const void * , const void * ); /* greater then */
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bool (*f_ge) ( const void * , const void * ); /* greater equal */
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bool (*f_eq) ( const void * , const void * ); /* equal */
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bool (*f_le) ( const void * , const void * ); /* less equal */
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bool (*f_lt) ( const void * , const void * ); /* less then */
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int32 (*f_cmp) ( const bytea * , const bytea * ); /* node compare */
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GBT_VARKEY* (*f_l2n) ( GBT_VARKEY * ); /* convert leaf to node */
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} gbtree_vinfo;
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extern GBT_VARKEY_R gbt_var_key_readable ( const GBT_VARKEY * k );
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extern GBT_VARKEY *gbt_var_key_copy ( const GBT_VARKEY_R * u, bool force_node );
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extern GISTENTRY *gbt_var_compress ( GISTENTRY *entry , const gbtree_vinfo * tinfo );
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extern GBT_VARKEY *gbt_var_union ( const GistEntryVector * entryvec , int32 * size ,
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const gbtree_vinfo * tinfo );
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extern bool gbt_var_same ( bool * result, const Datum d1 , const Datum d2 ,
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const gbtree_vinfo * tinfo );
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extern float *gbt_var_penalty ( float * res , const GISTENTRY * o , const GISTENTRY * n,
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const gbtree_vinfo * tinfo );
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extern bool gbt_var_consistent( GBT_VARKEY_R * key , const void * query,
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const StrategyNumber * strategy , bool is_leaf,
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const gbtree_vinfo * tinfo );
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extern GIST_SPLITVEC *gbt_var_picksplit ( const GistEntryVector *entryvec, GIST_SPLITVEC *v,
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const gbtree_vinfo * tinfo );
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extern void gbt_var_bin_union ( Datum * u , GBT_VARKEY * e ,
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const gbtree_vinfo * tinfo );
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