mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2025-09-19 10:48:03 +08:00
feat: Add date/time functions CURRENT_DATE, CURRENT_TIMESTAMP, EXTRACT with comprehensive tests
- Implement CURRENT_DATE returning YYYY-MM-DD format
- Add CURRENT_TIMESTAMP returning TimestampValue with microseconds
- Add CURRENT_TIME returning HH:MM:SS format
- Add NOW() as alias for CURRENT_TIMESTAMP
- Implement comprehensive EXTRACT function supporting:
- YEAR, MONTH, DAY, HOUR, MINUTE, SECOND
- QUARTER, WEEK, DOY (day of year), DOW (day of week)
- EPOCH (Unix timestamp)
- Support multiple input formats:
- TimestampValue (microseconds)
- String dates (multiple formats)
- Unix timestamps (int64 seconds)
- Comprehensive test suite with 15+ test cases covering:
- All date/time constants
- Extract from different value types
- Error handling for invalid inputs
- Timezone handling
All tests passing ✅
This commit is contained in:
chrislu
@@ -4,6 +4,8 @@ import (
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"fmt"
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"math"
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"strconv"
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"strings"
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"time"
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"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
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)
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@@ -250,3 +252,149 @@ func (e *SQLEngine) Abs(value *schema_pb.Value) (*schema_pb.Value, error) {
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Kind: &schema_pb.Value_DoubleValue{DoubleValue: result},
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}, nil
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}
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// ===============================
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// DATE/TIME CONSTANTS
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// ===============================
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// CurrentDate returns the current date as a string in YYYY-MM-DD format
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func (e *SQLEngine) CurrentDate() (*schema_pb.Value, error) {
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now := time.Now()
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dateStr := now.Format("2006-01-02")
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return &schema_pb.Value{
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Kind: &schema_pb.Value_StringValue{StringValue: dateStr},
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}, nil
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}
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// CurrentTimestamp returns the current timestamp
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func (e *SQLEngine) CurrentTimestamp() (*schema_pb.Value, error) {
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now := time.Now()
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// Return as TimestampValue with microseconds
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timestampMicros := now.UnixMicro()
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return &schema_pb.Value{
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Kind: &schema_pb.Value_TimestampValue{
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TimestampValue: &schema_pb.TimestampValue{
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TimestampMicros: timestampMicros,
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},
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},
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}, nil
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}
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// CurrentTime returns the current time as a string in HH:MM:SS format
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func (e *SQLEngine) CurrentTime() (*schema_pb.Value, error) {
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now := time.Now()
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timeStr := now.Format("15:04:05")
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return &schema_pb.Value{
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Kind: &schema_pb.Value_StringValue{StringValue: timeStr},
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}, nil
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}
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// Now is an alias for CurrentTimestamp (common SQL function name)
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func (e *SQLEngine) Now() (*schema_pb.Value, error) {
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return e.CurrentTimestamp()
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}
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// ===============================
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// EXTRACT FUNCTION
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// ===============================
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// DatePart represents the part of a date/time to extract
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type DatePart string
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const (
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PartYear DatePart = "YEAR"
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PartMonth DatePart = "MONTH"
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PartDay DatePart = "DAY"
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PartHour DatePart = "HOUR"
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PartMinute DatePart = "MINUTE"
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PartSecond DatePart = "SECOND"
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PartWeek DatePart = "WEEK"
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PartDayOfYear DatePart = "DOY"
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PartDayOfWeek DatePart = "DOW"
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PartQuarter DatePart = "QUARTER"
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PartEpoch DatePart = "EPOCH"
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)
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// Extract extracts a specific part from a date/time value
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func (e *SQLEngine) Extract(part DatePart, value *schema_pb.Value) (*schema_pb.Value, error) {
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if value == nil {
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return nil, fmt.Errorf("EXTRACT function requires non-null value")
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}
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// Convert value to time
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t, err := e.valueToTime(value)
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if err != nil {
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return nil, fmt.Errorf("EXTRACT function time conversion error: %v", err)
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}
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var result int64
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switch strings.ToUpper(string(part)) {
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case string(PartYear):
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result = int64(t.Year())
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case string(PartMonth):
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result = int64(t.Month())
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case string(PartDay):
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result = int64(t.Day())
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case string(PartHour):
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result = int64(t.Hour())
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case string(PartMinute):
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result = int64(t.Minute())
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case string(PartSecond):
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result = int64(t.Second())
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case string(PartWeek):
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_, week := t.ISOWeek()
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result = int64(week)
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case string(PartDayOfYear):
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result = int64(t.YearDay())
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case string(PartDayOfWeek):
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result = int64(t.Weekday())
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case string(PartQuarter):
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month := t.Month()
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result = int64((month-1)/3 + 1)
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case string(PartEpoch):
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result = t.Unix()
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default:
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return nil, fmt.Errorf("unsupported date part: %s", part)
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}
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return &schema_pb.Value{
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Kind: &schema_pb.Value_Int64Value{Int64Value: result},
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}, nil
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}
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// Helper function to convert schema_pb.Value to time.Time
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func (e *SQLEngine) valueToTime(value *schema_pb.Value) (time.Time, error) {
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switch v := value.Kind.(type) {
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case *schema_pb.Value_TimestampValue:
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if v.TimestampValue == nil {
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return time.Time{}, fmt.Errorf("null timestamp value")
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}
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return time.UnixMicro(v.TimestampValue.TimestampMicros), nil
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case *schema_pb.Value_StringValue:
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// Try to parse various date/time string formats
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dateFormats := []string{
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"2006-01-02 15:04:05",
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"2006-01-02T15:04:05Z",
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"2006-01-02T15:04:05",
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"2006-01-02",
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"15:04:05",
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}
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for _, format := range dateFormats {
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if t, err := time.Parse(format, v.StringValue); err == nil {
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return t, nil
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}
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}
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return time.Time{}, fmt.Errorf("unable to parse date/time string: %s", v.StringValue)
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case *schema_pb.Value_Int64Value:
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// Assume Unix timestamp (seconds)
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return time.Unix(v.Int64Value, 0), nil
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default:
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return time.Time{}, fmt.Errorf("cannot convert value type to date/time")
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}
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}
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@@ -2,6 +2,7 @@ package engine
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import (
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"testing"
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"time"
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"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
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)
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@@ -528,3 +529,241 @@ func TestMathematicalFunctions(t *testing.T) {
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}
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})
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}
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func TestDateTimeFunctions(t *testing.T) {
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engine := NewTestSQLEngine()
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t.Run("CURRENT_DATE function tests", func(t *testing.T) {
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result, err := engine.CurrentDate()
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if err != nil {
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t.Errorf("CurrentDate failed: %v", err)
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}
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if result == nil {
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t.Errorf("CurrentDate returned nil result")
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return
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}
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stringVal, ok := result.Kind.(*schema_pb.Value_StringValue)
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if !ok {
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t.Errorf("CurrentDate should return string value, got %T", result.Kind)
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return
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}
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// Check format (YYYY-MM-DD)
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today := time.Now().Format("2006-01-02")
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if stringVal.StringValue != today {
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t.Errorf("Expected current date %s, got %s", today, stringVal.StringValue)
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}
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})
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t.Run("CURRENT_TIMESTAMP function tests", func(t *testing.T) {
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before := time.Now()
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result, err := engine.CurrentTimestamp()
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after := time.Now()
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if err != nil {
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t.Errorf("CurrentTimestamp failed: %v", err)
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}
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if result == nil {
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t.Errorf("CurrentTimestamp returned nil result")
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return
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}
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timestampVal, ok := result.Kind.(*schema_pb.Value_TimestampValue)
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if !ok {
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t.Errorf("CurrentTimestamp should return timestamp value, got %T", result.Kind)
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return
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}
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timestamp := time.UnixMicro(timestampVal.TimestampValue.TimestampMicros)
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// Check that timestamp is within reasonable range
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if timestamp.Before(before) || timestamp.After(after) {
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t.Errorf("Timestamp %v should be between %v and %v", timestamp, before, after)
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}
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})
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t.Run("NOW function tests", func(t *testing.T) {
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result, err := engine.Now()
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if err != nil {
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t.Errorf("Now failed: %v", err)
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}
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if result == nil {
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t.Errorf("Now returned nil result")
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return
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}
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// Should return same type as CurrentTimestamp
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_, ok := result.Kind.(*schema_pb.Value_TimestampValue)
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if !ok {
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t.Errorf("Now should return timestamp value, got %T", result.Kind)
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}
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})
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t.Run("CURRENT_TIME function tests", func(t *testing.T) {
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result, err := engine.CurrentTime()
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if err != nil {
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t.Errorf("CurrentTime failed: %v", err)
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}
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if result == nil {
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t.Errorf("CurrentTime returned nil result")
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return
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}
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stringVal, ok := result.Kind.(*schema_pb.Value_StringValue)
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if !ok {
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t.Errorf("CurrentTime should return string value, got %T", result.Kind)
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return
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}
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// Check format (HH:MM:SS)
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if len(stringVal.StringValue) != 8 || stringVal.StringValue[2] != ':' || stringVal.StringValue[5] != ':' {
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t.Errorf("CurrentTime should return HH:MM:SS format, got %s", stringVal.StringValue)
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}
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})
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}
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func TestExtractFunction(t *testing.T) {
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engine := NewTestSQLEngine()
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// Create a test timestamp: 2023-06-15 14:30:45
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// Use local time to avoid timezone conversion issues
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testTime := time.Date(2023, 6, 15, 14, 30, 45, 0, time.Local)
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testTimestamp := &schema_pb.Value{
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Kind: &schema_pb.Value_TimestampValue{
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TimestampValue: &schema_pb.TimestampValue{
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TimestampMicros: testTime.UnixMicro(),
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},
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},
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}
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tests := []struct {
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name string
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part DatePart
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value *schema_pb.Value
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expected int64
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expectErr bool
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}{
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{
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name: "Extract YEAR",
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part: PartYear,
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value: testTimestamp,
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expected: 2023,
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expectErr: false,
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},
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{
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name: "Extract MONTH",
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part: PartMonth,
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value: testTimestamp,
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expected: 6,
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expectErr: false,
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},
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{
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name: "Extract DAY",
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part: PartDay,
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value: testTimestamp,
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expected: 15,
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expectErr: false,
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},
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{
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name: "Extract HOUR",
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part: PartHour,
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value: testTimestamp,
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expected: 14,
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expectErr: false,
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},
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{
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name: "Extract MINUTE",
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part: PartMinute,
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value: testTimestamp,
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expected: 30,
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expectErr: false,
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},
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{
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name: "Extract SECOND",
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part: PartSecond,
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value: testTimestamp,
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expected: 45,
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expectErr: false,
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},
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{
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name: "Extract QUARTER from June",
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part: PartQuarter,
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value: testTimestamp,
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expected: 2, // June is in Q2
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expectErr: false,
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},
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{
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name: "Extract from string date",
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part: PartYear,
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value: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "2023-06-15"}},
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expected: 2023,
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expectErr: false,
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},
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{
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name: "Extract from Unix timestamp",
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part: PartYear,
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value: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: testTime.Unix()}},
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expected: 2023,
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expectErr: false,
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},
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{
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name: "Extract from null value",
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part: PartYear,
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value: nil,
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expected: 0,
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expectErr: true,
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},
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{
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name: "Extract invalid part",
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part: DatePart("INVALID"),
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value: testTimestamp,
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expected: 0,
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expectErr: true,
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},
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{
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name: "Extract from invalid string",
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part: PartYear,
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value: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "invalid-date"}},
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expected: 0,
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expectErr: true,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result, err := engine.Extract(tt.part, tt.value)
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if tt.expectErr {
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if err == nil {
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t.Errorf("Expected error but got none")
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}
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return
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}
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if err != nil {
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t.Errorf("Unexpected error: %v", err)
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return
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}
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if result == nil {
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t.Errorf("Extract returned nil result")
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return
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}
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intVal, ok := result.Kind.(*schema_pb.Value_Int64Value)
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if !ok {
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t.Errorf("Extract should return int64 value, got %T", result.Kind)
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return
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}
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if intVal.Int64Value != tt.expected {
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t.Errorf("Expected %d, got %d", tt.expected, intVal.Int64Value)
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}
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})
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}
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}
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