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types.go
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types.go
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package converter
import (
"fmt"
"strings"
"github.com/zeromicro/ddl-parser/parser"
)
var unsignedTypeMap = map[string]string{
"int": "uint",
"int8": "uint8",
"int16": "uint16",
"int32": "uint32",
"int64": "uint64",
}
var commonMysqlDataTypeMapInt = map[int]string{
// For consistency, all integer types are converted to int64
// number
parser.Bit: "byte",
parser.TinyInt: "int64",
parser.SmallInt: "int64",
parser.MediumInt: "int64",
parser.Int: "int64",
parser.MiddleInt: "int64",
parser.Int1: "int64",
parser.Int2: "int64",
parser.Int3: "int64",
parser.Int4: "int64",
parser.Int8: "int64",
parser.Integer: "int64",
parser.BigInt: "int64",
parser.Float: "float64",
parser.Float4: "float64",
parser.Float8: "float64",
parser.Double: "float64",
parser.Decimal: "float64",
parser.Dec: "float64",
parser.Fixed: "float64",
parser.Numeric: "float64",
parser.Real: "float64",
// date&time
parser.Date: "time.Time",
parser.DateTime: "time.Time",
parser.Timestamp: "time.Time",
parser.Time: "string",
parser.Year: "int64",
// string
parser.Char: "string",
parser.VarChar: "string",
parser.NVarChar: "string",
parser.NChar: "string",
parser.Character: "string",
parser.LongVarChar: "string",
parser.LineString: "string",
parser.MultiLineString: "string",
parser.Binary: "string",
parser.VarBinary: "string",
parser.TinyText: "string",
parser.Text: "string",
parser.MediumText: "string",
parser.LongText: "string",
parser.Enum: "string",
parser.Set: "string",
parser.Json: "string",
parser.Blob: "string",
parser.LongBlob: "string",
parser.MediumBlob: "string",
parser.TinyBlob: "string",
// bool
parser.Bool: "bool",
parser.Boolean: "bool",
}
var commonMysqlDataTypeMapString = map[string]string{
// For consistency, all integer types are converted to int64
// bool
"bool": "bool",
"_bool": "pq.BoolArray",
"boolean": "bool",
// number
"tinyint": "int64",
"smallint": "int64",
"mediumint": "int64",
"int": "int64",
"int1": "int64",
"int2": "int64",
"_int2": "pq.Int64Array",
"int3": "int64",
"int4": "int64",
"_int4": "pq.Int64Array",
"int8": "int64",
"_int8": "pq.Int64Array",
"integer": "int64",
"_integer": "pq.Int64Array",
"bigint": "int64",
"float": "float64",
"float4": "float64",
"_float4": "pq.Float64Array",
"float8": "float64",
"_float8": "pq.Float64Array",
"double": "float64",
"decimal": "float64",
"dec": "float64",
"fixed": "float64",
"real": "float64",
"bit": "byte",
// date & time
"date": "time.Time",
"datetime": "time.Time",
"timestamp": "time.Time",
"time": "string",
"year": "int64",
// string
"linestring": "string",
"multilinestring": "string",
"nvarchar": "string",
"nchar": "string",
"char": "string",
"_char": "pq.StringArray",
"character": "string",
"varchar": "string",
"_varchar": "pq.StringArray",
"binary": "string",
"bytea": "string",
"longvarbinary": "string",
"varbinary": "string",
"tinytext": "string",
"text": "string",
"_text": "pq.StringArray",
"mediumtext": "string",
"longtext": "string",
"enum": "string",
"set": "string",
"json": "string",
"jsonb": "string",
"blob": "string",
"longblob": "string",
"mediumblob": "string",
"tinyblob": "string",
"ltree": "[]byte",
}
// ConvertDataType converts mysql column type into golang type
func ConvertDataType(dataBaseType int, isDefaultNull, unsigned, strict bool) (string, error) {
tp, ok := commonMysqlDataTypeMapInt[dataBaseType]
if !ok {
return "", fmt.Errorf("unsupported database type: %v", dataBaseType)
}
return mayConvertNullType(tp, isDefaultNull, unsigned, strict), nil
}
// ConvertStringDataType converts mysql column type into golang type
func ConvertStringDataType(dataBaseType string, isDefaultNull, unsigned, strict bool) (string, error) {
var isArray = strings.HasPrefix(dataBaseType, "_")
tp, ok := commonMysqlDataTypeMapString[strings.ToLower(dataBaseType)]
if !ok {
return "", fmt.Errorf("unsupported database type: %s", dataBaseType)
}
if isArray {
return tp, nil
}
return mayConvertNullType(tp, isDefaultNull, unsigned, strict), nil
}
func mayConvertNullType(goDataType string, isDefaultNull, unsigned, strict bool) string {
if !isDefaultNull {
if unsigned && strict {
ret, ok := unsignedTypeMap[goDataType]
if ok {
return ret
}
}
return goDataType
}
switch goDataType {
case "int64":
return "sql.NullInt64"
case "int32":
return "sql.NullInt32"
case "float64":
return "sql.NullFloat64"
case "bool":
return "sql.NullBool"
case "string":
return "sql.NullString"
case "time.Time":
return "sql.NullTime"
default:
if unsigned {
ret, ok := unsignedTypeMap[goDataType]
if ok {
return ret
}
}
return goDataType
}
}