catalog.cpp

#include "catalog.h"
#include "global.h"
#include "helper.h"

void
Catalog::init(const char * table_name, int field_cnt) {
    this->table_name = table_name;
    this->field_cnt = 0;
    this->_columns = new Column [field_cnt];
    this->tuple_size = 0;
}

void Catalog::add_col(char * col_name, uint64_t size, char * type) {
    _columns[field_cnt].size = size;
    strcpy(_columns[field_cnt].type, type);
    strcpy(_columns[field_cnt].name, col_name);
    _columns[field_cnt].id = field_cnt;
    _columns[field_cnt].index = tuple_size;
    tuple_size += size;
    field_cnt ++;
}

uint64_t Catalog::get_field_id(const char * name) {
    UInt32 i;
    for (i = 0; i < field_cnt; i++) {
        if (strcmp(name, _columns[i].name) == 0)
            break;
    }
    assert (i < field_cnt);
    return i;
}

char * Catalog::get_field_type(uint64_t id) {
    return _columns[id].type;
}

char * Catalog::get_field_name(uint64_t id) {
    return _columns[id].name;
}


char * Catalog::get_field_type(char * name) {
    return get_field_type( get_field_id(name) );
}

uint64_t Catalog::get_field_index(char * name) {
    return get_field_index( get_field_id(name) );
}

void Catalog::print_schema() {
    printf("\n[Catalog] %s\n", table_name);
    for (UInt32 i = 0; i < field_cnt; i++) {
        printf("\t%s\t%s\t%ld\n", get_field_name(i),
            get_field_type(i), get_field_size(i));
    }
}