Method writeDialectDepth

rel/sql.go:1337–1390

(depth int, w expr.DialectWriter)

	m.writeDialectDepth(0, w)
}
func (m *SqlSource) writeDialectDepth(depth int, w expr.DialectWriter) {

	if int(m.Op) == 0 && int(m.LeftOrRight) == 0 && int(m.JoinType) == 0 {
		if m.Alias != "" {
			w.WriteIdentity(m.Name)
			io.WriteString(w, " AS ")
			w.WriteIdentity(m.Alias)
			return
		}
		if m.Schema == "" {
			w.WriteIdentity(m.Name)
		} else {
			w.WriteIdentity(m.Schema)
			io.WriteString(w, ".")
			w.WriteIdentity(m.Name)
		}
		return
	}

	//   Jointype                Op
	//  INNER JOIN orders AS o 	ON
	if int(m.JoinType) != 0 {
		io.WriteString(w, strings.ToTitle(m.JoinType.String())) // inner/outer
		io.WriteString(w, " ")
	}
	io.WriteString(w, "JOIN ")

	if m.SubQuery != nil {
		io.WriteString(w, "(\n"+strings.Repeat("\t", depth+1))
		m.SubQuery.writeDialectDepth(depth+1, w)
		io.WriteString(w, "\n"+strings.Repeat("\t", depth)+")")
	} else {
		if m.Schema == "" {
			w.WriteIdentity(m.Name)
		} else {
			w.WriteIdentity(m.Schema)
			io.WriteString(w, ".")
			w.WriteIdentity(m.Name)
		}

	}
	if m.Alias != "" {
		io.WriteString(w, " AS ")
		w.WriteIdentity(m.Alias)
	}

	io.WriteString(w, " ")
	io.WriteString(w, strings.ToTitle(m.Op.String()))

	if m.JoinExpr != nil {
		w.Write([]byte{' '})
		m.JoinExpr.WriteDialect(w)
	}
}

func (m *SqlSource) BuildColIndex(colNames []string) error {
	if len(m.colIndex) == 0 {