feat: seek and limit (#5)

* feat: seek ident string

* feat: limit default value to 10

select.go

@@ -1,6 +1,7 @@
 package tyr
 
 import (
+	"fmt"
 	"strconv"
 
 	"github.com/kubuskotak/tyr/dialect"
@@ -293,10 +294,13 @@ func (b *SelectStmt) Suffix(suffix string, value ...interface{}) *SelectStmt {
 }
 
 // Seek fetches a page in key set way for a large set of data.
-func (b *SelectStmt) Seek(column string, cursor, limit uint64) *SelectStmt {
+func (b *SelectStmt) Seek(col string, cursor, limit uint64) *SelectStmt {
+	if limit == 0 { // default limit
+		limit = 10
+	}
 	nextCursor := cursor + limit
 	b.Limit(limit)
-	b.WhereCond = append(b.WhereCond, And(Gt(column, cursor), Lte(column, nextCursor)))
+	b.WhereCond = append(b.WhereCond, Expr(fmt.Sprintf("%s > ? AND %s <= ?", col, col), cursor, nextCursor))
 	return b
 }