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Support template to parse expression
Signed-off-by: Cai Zhang <[email protected]>
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129 changes: 129 additions & 0 deletions
129
internal/parser/planparserv2/convert_field_data_to_generic_value.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| package planparserv2 | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/milvus-io/milvus-proto/go-api/v2/schemapb" | ||
| "github.com/milvus-io/milvus/internal/proto/planpb" | ||
| ) | ||
|
|
||
| func ConvertFieldDataToGenericValue(templateName string, templateValue *schemapb.ScalarField, dataType schemapb.DataType) ([]*planpb.GenericValue, error) { | ||
| if templateValue == nil { | ||
| return nil, fmt.Errorf("expression template variable values is nil, template name: {%s}", templateName) | ||
| } | ||
| values := make([]*planpb.GenericValue, 0) | ||
| switch dataType { | ||
| case schemapb.DataType_Bool: | ||
| elements := templateValue.GetBoolData().GetData() | ||
| for _, element := range elements { | ||
| values = append(values, &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_BoolVal{ | ||
| BoolVal: element, | ||
| }, | ||
| }) | ||
| } | ||
| case schemapb.DataType_Int8, schemapb.DataType_Int16, schemapb.DataType_Int32: | ||
| elements := templateValue.GetIntData().GetData() | ||
| for _, element := range elements { | ||
| values = append(values, &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_Int64Val{ | ||
| Int64Val: int64(element), | ||
| }, | ||
| }) | ||
| } | ||
| case schemapb.DataType_Int64: | ||
| elements := templateValue.GetLongData().GetData() | ||
| for _, element := range elements { | ||
| values = append(values, &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_Int64Val{ | ||
| Int64Val: element, | ||
| }, | ||
| }) | ||
| } | ||
| case schemapb.DataType_Float: | ||
| elements := templateValue.GetFloatData().GetData() | ||
| for _, element := range elements { | ||
| values = append(values, &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_FloatVal{ | ||
| FloatVal: float64(element), | ||
| }, | ||
| }) | ||
| } | ||
| case schemapb.DataType_Double: | ||
| elements := templateValue.GetDoubleData().GetData() | ||
| for _, element := range elements { | ||
| values = append(values, &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_FloatVal{ | ||
| FloatVal: element, | ||
| }, | ||
| }) | ||
| } | ||
| case schemapb.DataType_String, schemapb.DataType_VarChar: | ||
| elements := templateValue.GetStringData().GetData() | ||
| for _, element := range elements { | ||
| values = append(values, &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_StringVal{ | ||
| StringVal: element, | ||
| }, | ||
| }) | ||
| } | ||
| case schemapb.DataType_Array: | ||
| elements := templateValue.GetArrayData().GetData() | ||
| for _, element := range elements { | ||
| arrayElements, err := ConvertFieldDataToGenericValue("", element, templateValue.GetArrayData().GetElementType()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| values = append(values, &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_ArrayVal{ | ||
| ArrayVal: &planpb.Array{ | ||
| Array: arrayElements, | ||
| SameType: templateValue.GetArrayData().GetElementType() != schemapb.DataType_JSON, | ||
| ElementType: templateValue.GetArrayData().GetElementType(), | ||
| }, | ||
| }, | ||
| }) | ||
| } | ||
| case schemapb.DataType_JSON: | ||
| elements := templateValue.GetJsonData().GetData() | ||
| for _, element := range elements { | ||
| var j interface{} | ||
| desc := json.NewDecoder(strings.NewReader(string(element))) | ||
| desc.UseNumber() | ||
| err := desc.Decode(&j) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| value, _, err := parseJSONValue(j) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| values = append(values, value) | ||
| } | ||
| default: | ||
| return nil, fmt.Errorf("expression elements can only be scalars") | ||
|
|
||
| } | ||
|
|
||
| return values, nil | ||
| } | ||
|
|
||
| func UnmarshalExpressionValues(input []*schemapb.FieldData) (map[string]*planpb.GenericValue, error) { | ||
| result := make(map[string]*planpb.GenericValue, len(input)) | ||
| for _, data := range input { | ||
| if _, ok := result[data.GetFieldName()]; ok { | ||
| return nil, fmt.Errorf("the number of elements in the template variable name is incorrect: {%s}", data.GetFieldName()) | ||
| } | ||
| rv, err := ConvertFieldDataToGenericValue(data.GetFieldName(), data.GetScalars(), data.GetType()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if len(rv) != 1 { | ||
| return nil, fmt.Errorf("the number of elements in the template variable name is incorrect: {%s}", data.GetFieldName()) | ||
| } | ||
| result[data.GetFieldName()] = rv[0] | ||
| } | ||
| return result, nil | ||
| } |
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