github.com/dolthub/dolt/go@v0.40.5-0.20240520175717-68db7794bea6/libraries/doltcore/schema/serial_encoding.go (about)

     1  // Copyright 2022 Dolthub, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package schema
    16  
    17  import (
    18  	"fmt"
    19  
    20  	"github.com/dolthub/go-mysql-server/sql"
    21  	"github.com/dolthub/go-mysql-server/sql/types"
    22  	"github.com/dolthub/vitess/go/vt/proto/query"
    23  
    24  	"github.com/dolthub/dolt/go/gen/fb/serial"
    25  )
    26  
    27  // EncodingFromSqlType returns a serial.Encoding for a sql.Type.
    28  func EncodingFromSqlType(typ sql.Type) serial.Encoding {
    29  	if extendedType, ok := typ.(types.ExtendedType); ok {
    30  		switch extendedType.MaxSerializedWidth() {
    31  		case types.ExtendedTypeSerializedWidth_64K:
    32  			return serial.EncodingExtended
    33  		case types.ExtendedTypeSerializedWidth_Unbounded:
    34  			return serial.EncodingExtendedAddr
    35  		default:
    36  			panic(fmt.Errorf("unknown serialization width"))
    37  		}
    38  	}
    39  	return EncodingFromQueryType(typ.Type())
    40  }
    41  
    42  // EncodingFromQueryType returns a serial.Encoding for a query.Type.
    43  func EncodingFromQueryType(typ query.Type) serial.Encoding {
    44  	switch typ {
    45  	case query.Type_INT8:
    46  		return serial.EncodingInt8
    47  	case query.Type_UINT8:
    48  		return serial.EncodingUint8
    49  	case query.Type_INT16:
    50  		return serial.EncodingInt16
    51  	case query.Type_UINT16:
    52  		return serial.EncodingUint16
    53  	case query.Type_INT24:
    54  		return serial.EncodingInt32
    55  	case query.Type_UINT24:
    56  		return serial.EncodingUint32
    57  	case query.Type_INT32:
    58  		return serial.EncodingInt32
    59  	case query.Type_UINT32:
    60  		return serial.EncodingUint32
    61  	case query.Type_INT64:
    62  		return serial.EncodingInt64
    63  	case query.Type_UINT64:
    64  		return serial.EncodingUint64
    65  	case query.Type_FLOAT32:
    66  		return serial.EncodingFloat32
    67  	case query.Type_FLOAT64:
    68  		return serial.EncodingFloat64
    69  	case query.Type_BIT:
    70  		return serial.EncodingUint64
    71  	case query.Type_DECIMAL:
    72  		return serial.EncodingDecimal
    73  	case query.Type_YEAR:
    74  		return serial.EncodingYear
    75  	case query.Type_DATE:
    76  		return serial.EncodingDate
    77  	case query.Type_TIME:
    78  		return serial.EncodingTime
    79  	case query.Type_TIMESTAMP:
    80  		return serial.EncodingDatetime
    81  	case query.Type_DATETIME:
    82  		return serial.EncodingDatetime
    83  	case query.Type_ENUM:
    84  		return serial.EncodingEnum
    85  	case query.Type_SET:
    86  		return serial.EncodingSet
    87  	case query.Type_BINARY:
    88  		return serial.EncodingBytes
    89  	case query.Type_VARBINARY:
    90  		return serial.EncodingBytes
    91  	case query.Type_CHAR:
    92  		return serial.EncodingString
    93  	case query.Type_VARCHAR:
    94  		return serial.EncodingString
    95  	case query.Type_GEOMETRY:
    96  		return serial.EncodingGeomAddr
    97  	case query.Type_JSON:
    98  		return serial.EncodingJSONAddr
    99  	case query.Type_BLOB:
   100  		return serial.EncodingBytesAddr
   101  	case query.Type_TEXT:
   102  		return serial.EncodingStringAddr
   103  	default:
   104  		panic(fmt.Sprintf("unknown encoding %v", typ))
   105  	}
   106  }