Method getDistinctTable

engine/table.go:42–71

getDistinctTable - Takes input table, and returns new one without any duplicates

()

// getDistinctTable - Takes input table, and returns new one without any duplicates
func (table *Table) getDistinctTable() *Table {
	distinctTable := getCopyOfTableWithoutRows(table)

	rowsCount := len(table.Columns[0].Values)

	checksumSet := map[uint32]struct{}{}

	for iRow := 0; iRow < rowsCount; iRow++ {

		mergedColumnValues := ""
		for iColumn := range table.Columns {
			fieldValue := table.Columns[iColumn].Values[iRow].ToString()
			if table.Columns[iColumn].Type.Literal == token.TEXT {
				fieldValue = "'" + fieldValue + "'"
			}
			mergedColumnValues += fieldValue
		}
		checksum := adler32.Checksum([]byte(mergedColumnValues))

		_, exist := checksumSet[checksum]
		if !exist {
			checksumSet[checksum] = struct{}{}
			for i, column := range distinctTable.Columns {
				column.Values = append(column.Values, table.Columns[i].Values[iRow])
			}
		}
	}

	return distinctTable
}

// ToString - Return string contain all values and Column names in Table
func (table *Table) ToString() string {