Fuzzy Querying Capability at Core of a RDBMS - Advanced Database Query Systems - page 176

Box 9.

typedef struct A_FuzzyQuan {
NodeTag type;

char pred; // quantifier name

char *minfp; // support's left bound

char *core1; // core's left bound (included)

char *core2; // core's right bound (included)

char *maxfp; // support's right bound

int typefp; // shape 1(trapz.) 2(increases) 3(decreases)

int typefq; // nature 1 (absolute) 2 (proportional)

List *args; // the arguments (list of exprs)

unsigned int vno; // table number

int vattno; // relative attribute number

} A_FuzzyQuan;

Box 10.

typedef struct A_FuzzyComp {
NodeTag type;

char *pred; // comparator name

char *minfp; // support's left bound

int modminfp;

char *core1; // core's left bound (included)

int modcore1;

char *core2; // core's right bound (included)

int modcore2;

char *maxfp; // support's right bound

int modmaxfp;

int typefp; // shape 1(trapz.) 2(increases) 3(decreases)

int modtypefp;

unsigned int vno; // table number

int vattno; // relative attribute number

Oid rorigtab;

Oid rorigcol;

List *compfclist; // compare fuzzy predicate list.

char *disd; // discrete domain.

bool hasfm; // has fuzzy modifier

char *fuzzymod; // modifier name

int Mtype; // modifier type

int Mpower; // modifier power

int normType;

A_Const *secarg;

int vtype;

} A_FuzzyComp;