select="select"
from="from"
cname1="aaa"
cname1="bbb"
cname1="ccc"
type1="float"
type2="int8"
type3="bit"
lparen="["
rparen="]"
pk="primary key"
text="text"
distance_metric="distance_metric"
eq="="
l1="l1"
l2="l2"
cosine="cosine"
hamming="hamming"
vec_distance_l2="vec_distance_l2"
vec_distance_l1="vec_distance_l1"
comma=","