func()

in pkg/datasource/sql/undo/builder/basic_undo_log_builder.go [175:228]

• 47 lines of code
• 12 McCabe index (conditional complexity)

func (b *BasicUndoLogBuilder) buildWhereConditionByPKs(pkNameList []string, rowSize int, dbType string, maxInSize int) string {
	var (
		whereStr  = &strings.Builder{}
		batchSize = rowSize/maxInSize + 1
	)

	if rowSize%maxInSize == 0 {
		batchSize = rowSize / maxInSize
	}

	for batch := 0; batch < batchSize; batch++ {
		if batch > 0 {
			whereStr.WriteString(" OR ")
		}
		whereStr.WriteString("(")

		for i := 0; i < len(pkNameList); i++ {
			if i > 0 {
				whereStr.WriteString(",")
			}
			// todo add escape
			whereStr.WriteString(fmt.Sprintf("`%s`", pkNameList[i]))
		}
		whereStr.WriteString(") IN (")

		var eachSize int

		if batch == batchSize-1 {
			if rowSize%maxInSize == 0 {
				eachSize = maxInSize
			} else {
				eachSize = rowSize % maxInSize
			}
		} else {
			eachSize = maxInSize
		}

		for i := 0; i < eachSize; i++ {
			if i > 0 {
				whereStr.WriteString(",")
			}
			whereStr.WriteString("(")
			for j := 0; j < len(pkNameList); j++ {
				if j > 0 {
					whereStr.WriteString(",")
				}
				whereStr.WriteString("?")
			}
			whereStr.WriteString(")")
		}
		whereStr.WriteString(")")
	}
	return whereStr.String()
}