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package engine
import (
"fmt"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
"github.com/seaweedfs/seaweedfs/weed/query/sqltypes"
)
// formatAggregationResult formats an aggregation result into a SQL value
func (e *SQLEngine) formatAggregationResult(spec AggregationSpec, result AggregationResult) sqltypes.Value {
switch spec.Function {
case "COUNT":
return sqltypes.NewInt64(result.Count)
case "SUM":
return sqltypes.NewFloat64(result.Sum)
case "AVG":
return sqltypes.NewFloat64(result.Sum) // Sum contains the average for AVG
case "MIN":
if result.Min != nil {
return e.convertRawValueToSQL(result.Min)
}
return sqltypes.NULL
case "MAX":
if result.Max != nil {
return e.convertRawValueToSQL(result.Max)
}
return sqltypes.NULL
}
return sqltypes.NULL
}
// convertRawValueToSQL converts a raw Go value to a SQL value
func (e *SQLEngine) convertRawValueToSQL(value interface{}) sqltypes.Value {
switch v := value.(type) {
case int32:
return sqltypes.NewInt32(v)
case int64:
return sqltypes.NewInt64(v)
case float32:
return sqltypes.NewFloat32(v)
case float64:
return sqltypes.NewFloat64(v)
case string:
return sqltypes.NewVarChar(v)
case bool:
if v {
return sqltypes.NewVarChar("1")
}
return sqltypes.NewVarChar("0")
}
return sqltypes.NULL
}
// extractRawValue extracts the raw Go value from a schema_pb.Value
func (e *SQLEngine) extractRawValue(value *schema_pb.Value) interface{} {
switch v := value.Kind.(type) {
case *schema_pb.Value_Int32Value:
return v.Int32Value
case *schema_pb.Value_Int64Value:
return v.Int64Value
case *schema_pb.Value_FloatValue:
return v.FloatValue
case *schema_pb.Value_DoubleValue:
return v.DoubleValue
case *schema_pb.Value_StringValue:
return v.StringValue
case *schema_pb.Value_BoolValue:
return v.BoolValue
case *schema_pb.Value_BytesValue:
return string(v.BytesValue) // Convert bytes to string for comparison
}
return nil
}
// compareValues compares two schema_pb.Value objects
func (e *SQLEngine) compareValues(value1 *schema_pb.Value, value2 *schema_pb.Value) int {
if value2 == nil {
return 1 // value1 > nil
}
raw1 := e.extractRawValue(value1)
raw2 := e.extractRawValue(value2)
if raw1 == nil {
return -1
}
if raw2 == nil {
return 1
}
// Simple comparison - in a full implementation this would handle type coercion
switch v1 := raw1.(type) {
case int32:
if v2, ok := raw2.(int32); ok {
if v1 < v2 {
return -1
} else if v1 > v2 {
return 1
}
return 0
}
case int64:
if v2, ok := raw2.(int64); ok {
if v1 < v2 {
return -1
} else if v1 > v2 {
return 1
}
return 0
}
case float32:
if v2, ok := raw2.(float32); ok {
if v1 < v2 {
return -1
} else if v1 > v2 {
return 1
}
return 0
}
case float64:
if v2, ok := raw2.(float64); ok {
if v1 < v2 {
return -1
} else if v1 > v2 {
return 1
}
return 0
}
case string:
if v2, ok := raw2.(string); ok {
if v1 < v2 {
return -1
} else if v1 > v2 {
return 1
}
return 0
}
case bool:
if v2, ok := raw2.(bool); ok {
if v1 == v2 {
return 0
} else if v1 && !v2 {
return 1
}
return -1
}
}
return 0
}
// convertRawValueToSchemaValue converts raw Go values back to schema_pb.Value for comparison
func (e *SQLEngine) convertRawValueToSchemaValue(rawValue interface{}) *schema_pb.Value {
switch v := rawValue.(type) {
case int32:
return &schema_pb.Value{Kind: &schema_pb.Value_Int32Value{Int32Value: v}}
case int64:
return &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: v}}
case float32:
return &schema_pb.Value{Kind: &schema_pb.Value_FloatValue{FloatValue: v}}
case float64:
return &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: v}}
case string:
return &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: v}}
case bool:
return &schema_pb.Value{Kind: &schema_pb.Value_BoolValue{BoolValue: v}}
case []byte:
return &schema_pb.Value{Kind: &schema_pb.Value_BytesValue{BytesValue: v}}
default:
// Convert other types to string as fallback
return &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: fmt.Sprintf("%v", v)}}
}
}
// convertJSONValueToSchemaValue converts JSON values to schema_pb.Value
func (e *SQLEngine) convertJSONValueToSchemaValue(jsonValue interface{}) *schema_pb.Value {
switch v := jsonValue.(type) {
case string:
return &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: v}}
case float64:
// JSON numbers are always float64, try to detect if it's actually an integer
if v == float64(int64(v)) {
return &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: int64(v)}}
}
return &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: v}}
case bool:
return &schema_pb.Value{Kind: &schema_pb.Value_BoolValue{BoolValue: v}}
case nil:
return nil
default:
// Convert other types to string
return &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: fmt.Sprintf("%v", v)}}
}
}
// Helper functions for aggregation processing
// isNullValue checks if a schema_pb.Value is null or empty
func (e *SQLEngine) isNullValue(value *schema_pb.Value) bool {
return value == nil || value.Kind == nil
}
// convertToNumber converts a schema_pb.Value to a float64 for numeric operations
func (e *SQLEngine) convertToNumber(value *schema_pb.Value) *float64 {
switch v := value.Kind.(type) {
case *schema_pb.Value_Int32Value:
result := float64(v.Int32Value)
return &result
case *schema_pb.Value_Int64Value:
result := float64(v.Int64Value)
return &result
case *schema_pb.Value_FloatValue:
result := float64(v.FloatValue)
return &result
case *schema_pb.Value_DoubleValue:
return &v.DoubleValue
}
return nil
}
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