builder.WriteByte('(')
					}
				}

				c.Build(builder)

				if wrapInParentheses {
					builder.WriteByte(')')
				}
			}
		}

		if len(not.Exprs) > 1 {
			builder.WriteByte(')')
		}
	} else {
		builder.WriteString("NOT ")
		if len(not.Exprs) > 1 {
			builder.WriteByte('(')
		}

		for idx, c := range not.Exprs {

    val dataSize = messageBuffer.size
    sinkBuffer.writeByte(b0)

    var b1 = 0
    if (isClient) {
      b1 = b1 or B1_FLAG_MASK
    }
    when {
      dataSize <= PAYLOAD_BYTE_MAX -> {
        b1 = b1 or dataSize.toInt()
        sinkBuffer.writeByte(b1)
      }
      dataSize <= PAYLOAD_SHORT_MAX -> {
        b1 = b1 or PAYLOAD_SHORT
        sinkBuffer.writeByte(b1)
        sinkBuffer.writeShort(dataSize.toInt())

			if inName {
				if nv, ok := namedMap[string(name)]; ok {
					builder.AddVar(builder, nv)
				} else {
					builder.WriteByte('@')
					builder.WriteString(string(name))
				}
				inName = false
			}

			afterParenthesis = false
			builder.WriteByte(v)
		} else if v == '?' && len(expr.Vars) > idx {
			if afterParenthesis {
				if _, ok := expr.Vars[idx].(driver.Valuer); ok {

      val byte0 = tagClass or constructedBit or tag.toInt()
      sink.writeByte(byte0)
    } else {
      val byte0 = tagClass or constructedBit or 0b0001_1111
      sink.writeByte(byte0)
      writeVariableLengthLong(tag)
    }

    // Write the length. This takes 1 byte if length is less than 128.
    val length = content.size
    if (length < 128) {
      sink.writeByte(length.toInt())
    } else {

	for k := range c {
		sortedKeys = append(sortedKeys, k)
	}
	sort.Strings(sortedKeys)

	b.WriteByte('{')
	for i, k := range sortedKeys {
		b.WriteByte('"')
		escapeStringJSON(b, k)
		b.WriteString(`":"`)
		escapeStringJSON(b, c[k])
		b.WriteByte('"')
		if i < len(sortedKeys)-1 {
			b.WriteByte(',')
		}
	}
	b.WriteByte('}')
	return b.Bytes(), nil
}

// Adapted from Go stdlib.

	if onConflict.OnConstraint != "" {
		builder.WriteString("ON CONSTRAINT ")
		builder.WriteString(onConflict.OnConstraint)
		builder.WriteByte(' ')
	} else {
		if len(onConflict.Columns) > 0 {
			builder.WriteByte('(')
			for idx, column := range onConflict.Columns {
				if idx > 0 {
					builder.WriteByte(',')
				}
				builder.WriteQuoted(column)
			}
			builder.WriteString(`) `)
		}

          throw ProtocolException("unexpected address: " + toSocket.localAddress)
        }

        // Write the reply.
        fromSink.writeByte(VERSION_5)
        fromSink.writeByte(REPLY_SUCCEEDED)
        fromSink.writeByte(0)
        fromSink.writeByte(ADDRESS_TYPE_IPV4)
        fromSink.write(localAddress)
        fromSink.writeShort(toSocket.localPort)
        fromSink.emit()

func (from From) Build(builder Builder) {
	if len(from.Tables) > 0 {
		for idx, table := range from.Tables {
			if idx > 0 {
				builder.WriteByte(',')
			}

			builder.WriteQuoted(table)
		}
	} else {
		builder.WriteQuoted(currentTable)
	}

	for _, join := range from.Joins {
		builder.WriteByte(' ')
		join.Build(builder)
	}
}

// MergeClause merge from clause
func (from From) MergeClause(clause *Clause) {

			c.BeforeExpression.Build(builder)
			builder.WriteByte(' ')
		}

		if c.Name != "" {
			builder.WriteString(c.Name)
			builder.WriteByte(' ')
		}

		if c.AfterNameExpression != nil {
			c.AfterNameExpression.Build(builder)
			builder.WriteByte(' ')
		}

		c.Expression.Build(builder)

		if c.AfterExpression != nil {
			builder.WriteByte(' ')
			c.AfterExpression.Build(builder)
		}
	}
}

    assertThat(Buffer().writeUtf8("white\t space").isProbablyUtf8()).isTrue()
    assertThat(Buffer().writeByte(0x80).isProbablyUtf8()).isTrue()
    assertThat(Buffer().writeByte(0x00).isProbablyUtf8()).isFalse()
    assertThat(Buffer().writeByte(0xc0).isProbablyUtf8()).isFalse()
  }