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parser.go
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/
parser.go
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package parser
import (
"fmt"
"strings"
"github.com/3Rivers/go-zero/tools/goctl/model/sql/converter"
"github.com/3Rivers/go-zero/tools/goctl/model/sql/model"
"github.com/3Rivers/go-zero/tools/goctl/util/stringx"
"github.com/xwb1989/sqlparser"
)
const (
_ = iota
primary
unique
normal
spatial
)
const timeImport = "time.Time"
type (
Table struct {
Name stringx.String
PrimaryKey Primary
Fields []Field
}
Primary struct {
Field
AutoIncrement bool
}
Field struct {
Name stringx.String
DataBaseType string
DataType string
IsPrimaryKey bool
IsUniqueKey bool
Comment string
}
KeyType int
)
func Parse(ddl string) (*Table, error) {
stmt, err := sqlparser.ParseStrictDDL(ddl)
if err != nil {
return nil, err
}
ddlStmt, ok := stmt.(*sqlparser.DDL)
if !ok {
return nil, unSupportDDL
}
action := ddlStmt.Action
if action != sqlparser.CreateStr {
return nil, fmt.Errorf("expected [CREATE] action,but found: %s", action)
}
tableName := ddlStmt.NewName.Name.String()
tableSpec := ddlStmt.TableSpec
if tableSpec == nil {
return nil, tableBodyIsNotFound
}
columns := tableSpec.Columns
indexes := tableSpec.Indexes
keyMap := make(map[string]KeyType)
for _, index := range indexes {
info := index.Info
if info == nil {
continue
}
if info.Primary {
if len(index.Columns) > 1 {
return nil, errPrimaryKey
}
keyMap[index.Columns[0].Column.String()] = primary
continue
}
// can optimize
if len(index.Columns) > 1 {
continue
}
column := index.Columns[0]
columnName := column.Column.String()
camelColumnName := stringx.From(columnName).ToCamel()
// by default, createTime|updateTime findOne is not used.
if camelColumnName == "CreateTime" || camelColumnName == "UpdateTime" {
continue
}
if info.Unique {
keyMap[columnName] = unique
} else if info.Spatial {
keyMap[columnName] = spatial
} else {
keyMap[columnName] = normal
}
}
var fields []Field
var primaryKey Primary
for _, column := range columns {
if column == nil {
continue
}
var comment string
if column.Type.Comment != nil {
comment = string(column.Type.Comment.Val)
}
var isDefaultNull = true
if column.Type.NotNull {
isDefaultNull = false
} else {
if column.Type.Default == nil {
isDefaultNull = false
} else if string(column.Type.Default.Val) != "null" {
isDefaultNull = false
}
}
dataType, err := converter.ConvertDataType(column.Type.Type, isDefaultNull)
if err != nil {
return nil, err
}
var field Field
field.Name = stringx.From(column.Name.String())
field.DataBaseType = column.Type.Type
field.DataType = dataType
field.Comment = comment
key, ok := keyMap[column.Name.String()]
if ok {
field.IsPrimaryKey = key == primary
field.IsUniqueKey = key == unique
if field.IsPrimaryKey {
primaryKey.Field = field
if column.Type.Autoincrement {
primaryKey.AutoIncrement = true
}
}
}
fields = append(fields, field)
}
return &Table{
Name: stringx.From(tableName),
PrimaryKey: primaryKey,
Fields: fields,
}, nil
}
func (t *Table) ContainsTime() bool {
for _, item := range t.Fields {
if item.DataType == timeImport {
return true
}
}
return false
}
func ConvertColumn(db, table string, in []*model.Column) (*Table, error) {
var reply Table
reply.Name = stringx.From(table)
keyMap := make(map[string][]*model.Column)
for _, column := range in {
keyMap[column.Key] = append(keyMap[column.Key], column)
}
primaryColumns := keyMap["PRI"]
if len(primaryColumns) == 0 {
return nil, fmt.Errorf("database:%s, table %s: missing primary key", db, table)
}
if len(primaryColumns) > 1 {
return nil, fmt.Errorf("database:%s, table %s: only one primary key expected", db, table)
}
primaryColumn := primaryColumns[0]
isDefaultNull := primaryColumn.ColumnDefault == nil && primaryColumn.IsNullAble == "YES"
primaryFt, err := converter.ConvertDataType(primaryColumn.DataType, isDefaultNull)
if err != nil {
return nil, err
}
primaryField := Field{
Name: stringx.From(primaryColumn.Name),
DataBaseType: primaryColumn.DataType,
DataType: primaryFt,
IsUniqueKey: true,
IsPrimaryKey: true,
Comment: primaryColumn.Comment,
}
reply.PrimaryKey = Primary{
Field: primaryField,
AutoIncrement: strings.Contains(primaryColumn.Extra, "auto_increment"),
}
for key, columns := range keyMap {
for _, item := range columns {
isColumnDefaultNull := item.ColumnDefault == nil && item.IsNullAble == "YES"
dt, err := converter.ConvertDataType(item.DataType, isColumnDefaultNull)
if err != nil {
return nil, err
}
f := Field{
Name: stringx.From(item.Name),
DataBaseType: item.DataType,
DataType: dt,
IsPrimaryKey: primaryColumn.Name == item.Name,
Comment: item.Comment,
}
if key == "UNI" {
f.IsUniqueKey = true
}
reply.Fields = append(reply.Fields, f)
}
}
return &reply, nil
}