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parser.go
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parser.go
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package parser
import (
"fmt"
"path/filepath"
"sort"
"strings"
"github.com/zeromicro/ddl-parser/parser"
"github.com/zeromicro/go-zero/core/collection"
"github.com/jageros/goctl/model/sql/converter"
"github.com/jageros/goctl/model/sql/model"
"github.com/jageros/goctl/model/sql/util"
"github.com/jageros/goctl/util/console"
"github.com/jageros/goctl/util/stringx"
)
const (
timeImport = "time.Time"
decimalImport = "decimal.Decimal"
decimalImportPtr = "*decimal.Decimal"
)
type (
// Table describes a mysql table
Table struct {
Name stringx.String
Db stringx.String
PrimaryKey Primary
UniqueIndex map[string][]*Field
Fields []*Field
ContainsPQ bool
}
// Primary describes a primary key
Primary struct {
Field
AutoIncrement bool
}
// Field describes a table field
Field struct {
NameOriginal string
Name stringx.String
DataType string
Comment string
SeqInIndex int
OrdinalPosition int
ContainsPQ bool
}
// KeyType types alias of int
KeyType int
)
func parseNameOriginal(ts []*parser.Table) (nameOriginals [][]string) {
var columns []string
for _, t := range ts {
columns = []string{}
for _, c := range t.Columns {
columns = append(columns, c.Name)
}
nameOriginals = append(nameOriginals, columns)
}
return
}
// Parse parses ddl into golang structure
func Parse(filename, database string, strict bool) ([]*Table, error) {
p := parser.NewParser()
tables, err := p.From(filename)
if err != nil {
return nil, err
}
nameOriginals := parseNameOriginal(tables)
indexNameGen := func(column ...string) string {
return strings.Join(column, "_")
}
prefix := filepath.Base(filename)
var list []*Table
for indexTable, e := range tables {
var (
primaryColumn string
primaryColumnSet = collection.NewSet()
uniqueKeyMap = make(map[string][]string)
normalKeyMap = make(map[string][]string)
columns = e.Columns
)
for _, column := range columns {
if column.Constraint != nil {
if column.Constraint.Primary {
primaryColumnSet.AddStr(column.Name)
}
if column.Constraint.Unique {
indexName := indexNameGen(column.Name, "unique")
uniqueKeyMap[indexName] = []string{column.Name}
}
if column.Constraint.Key {
indexName := indexNameGen(column.Name, "idx")
uniqueKeyMap[indexName] = []string{column.Name}
}
}
}
for _, e := range e.Constraints {
if len(e.ColumnPrimaryKey) > 1 {
return nil, fmt.Errorf("%s: unexpected join primary key", prefix)
}
if len(e.ColumnPrimaryKey) == 1 {
primaryColumn = e.ColumnPrimaryKey[0]
primaryColumnSet.AddStr(e.ColumnPrimaryKey[0])
}
if len(e.ColumnUniqueKey) > 0 {
list := append([]string(nil), e.ColumnUniqueKey...)
list = append(list, "unique")
indexName := indexNameGen(list...)
uniqueKeyMap[indexName] = e.ColumnUniqueKey
}
}
if primaryColumnSet.Count() > 1 {
return nil, fmt.Errorf("%s: unexpected join primary key", prefix)
}
primaryKey, fieldM, err := convertColumns(columns, primaryColumn, strict)
if err != nil {
return nil, err
}
var fields []*Field
// sort
for indexColumn, c := range columns {
field, ok := fieldM[c.Name]
if ok {
field.NameOriginal = nameOriginals[indexTable][indexColumn]
fields = append(fields, field)
}
}
var (
uniqueIndex = make(map[string][]*Field)
normalIndex = make(map[string][]*Field)
)
for indexName, each := range uniqueKeyMap {
for _, columnName := range each {
uniqueIndex[indexName] = append(uniqueIndex[indexName], fieldM[columnName])
}
}
for indexName, each := range normalKeyMap {
for _, columnName := range each {
normalIndex[indexName] = append(normalIndex[indexName], fieldM[columnName])
}
}
checkDuplicateUniqueIndex(uniqueIndex, e.Name)
list = append(list, &Table{
Name: stringx.From(e.Name),
Db: stringx.From(database),
PrimaryKey: primaryKey,
UniqueIndex: uniqueIndex,
Fields: fields,
})
}
return list, nil
}
func checkDuplicateUniqueIndex(uniqueIndex map[string][]*Field, tableName string) {
log := console.NewColorConsole()
uniqueSet := collection.NewSet()
for k, i := range uniqueIndex {
var list []string
for _, e := range i {
list = append(list, e.Name.Source())
}
joinRet := strings.Join(list, ",")
if uniqueSet.Contains(joinRet) {
log.Warning("[checkDuplicateUniqueIndex]: table %s: duplicate unique index %s", tableName, joinRet)
delete(uniqueIndex, k)
continue
}
uniqueSet.AddStr(joinRet)
}
}
func convertColumns(columns []*parser.Column, primaryColumn string, strict bool) (Primary, map[string]*Field, error) {
var (
primaryKey Primary
fieldM = make(map[string]*Field)
log = console.NewColorConsole()
)
for _, column := range columns {
if column == nil {
continue
}
var (
comment string
isDefaultNull bool
)
if column.Constraint != nil {
comment = column.Constraint.Comment
isDefaultNull = !column.Constraint.NotNull
if !column.Constraint.NotNull && column.Constraint.HasDefaultValue {
isDefaultNull = false
}
if column.Name == primaryColumn {
isDefaultNull = false
}
}
dataType, err := converter.ConvertDataType(column.DataType.Type(), isDefaultNull, column.DataType.Unsigned(), strict)
if err != nil {
return Primary{}, nil, err
}
if column.Constraint != nil {
if column.Name == primaryColumn {
if !column.Constraint.AutoIncrement && dataType == "int64" {
log.Warning("[convertColumns]: The primary key %q is recommended to add constraint `AUTO_INCREMENT`", column.Name)
}
} else if column.Constraint.NotNull && !column.Constraint.HasDefaultValue {
log.Warning("[convertColumns]: The column %q is recommended to add constraint `DEFAULT`", column.Name)
}
}
var field Field
field.Name = stringx.From(column.Name)
field.DataType = dataType
field.Comment = util.TrimNewLine(comment)
if field.Name.Source() == primaryColumn {
primaryKey = Primary{
Field: field,
}
if column.Constraint != nil {
primaryKey.AutoIncrement = column.Constraint.AutoIncrement
}
}
fieldM[field.Name.Source()] = &field
}
return primaryKey, fieldM, nil
}
// ContainsTime returns true if contains golang type time.Time
func (t *Table) ContainsTime() bool {
for _, item := range t.Fields {
if item.DataType == timeImport {
return true
}
}
return false
}
// ContainsDecimal returns true if contains golang type decimal.Decimal
func (t *Table) ContainsDecimal() bool {
for _, item := range t.Fields {
if item.DataType == decimalImport || item.DataType == decimalImportPtr {
return true
}
}
return false
}
// ConvertDataType converts mysql data type into golang data type
func ConvertDataType(table *model.Table, strict bool) (*Table, error) {
isPrimaryDefaultNull := table.PrimaryKey.ColumnDefault == nil && table.PrimaryKey.IsNullAble == "YES"
isPrimaryUnsigned := strings.Contains(table.PrimaryKey.DbColumn.ColumnType, "unsigned")
primaryDataType, containsPQ, err := converter.ConvertStringDataType(table.PrimaryKey.DataType, isPrimaryDefaultNull, isPrimaryUnsigned, strict)
if err != nil {
return nil, err
}
var reply Table
reply.ContainsPQ = containsPQ
reply.UniqueIndex = map[string][]*Field{}
reply.Name = stringx.From(table.Table)
reply.Db = stringx.From(table.Db)
seqInIndex := 0
if table.PrimaryKey.Index != nil {
seqInIndex = table.PrimaryKey.Index.SeqInIndex
}
reply.PrimaryKey = Primary{
Field: Field{
Name: stringx.From(table.PrimaryKey.Name),
DataType: primaryDataType,
Comment: table.PrimaryKey.Comment,
SeqInIndex: seqInIndex,
OrdinalPosition: table.PrimaryKey.OrdinalPosition,
},
AutoIncrement: strings.Contains(table.PrimaryKey.Extra, "auto_increment"),
}
fieldM, err := getTableFields(table, strict)
if err != nil {
return nil, err
}
for _, each := range fieldM {
if each.ContainsPQ {
reply.ContainsPQ = true
}
reply.Fields = append(reply.Fields, each)
}
sort.Slice(reply.Fields, func(i, j int) bool {
return reply.Fields[i].OrdinalPosition < reply.Fields[j].OrdinalPosition
})
uniqueIndexSet := collection.NewSet()
log := console.NewColorConsole()
for indexName, each := range table.UniqueIndex {
sort.Slice(each, func(i, j int) bool {
if each[i].Index != nil {
return each[i].Index.SeqInIndex < each[j].Index.SeqInIndex
}
return false
})
if len(each) == 1 {
one := each[0]
if one.Name == table.PrimaryKey.Name {
log.Warning("[ConvertDataType]: table %q, duplicate unique index with primary key: %q", table.Table, one.Name)
continue
}
}
var list []*Field
var uniqueJoin []string
for _, c := range each {
list = append(list, fieldM[c.Name])
uniqueJoin = append(uniqueJoin, c.Name)
}
uniqueKey := strings.Join(uniqueJoin, ",")
if uniqueIndexSet.Contains(uniqueKey) {
log.Warning("[ConvertDataType]: table %q, duplicate unique index %q", table.Table, uniqueKey)
continue
}
uniqueIndexSet.AddStr(uniqueKey)
reply.UniqueIndex[indexName] = list
}
return &reply, nil
}
func getTableFields(table *model.Table, strict bool) (map[string]*Field, error) {
fieldM := make(map[string]*Field)
for _, each := range table.Columns {
isDefaultNull := each.ColumnDefault == nil && each.IsNullAble == "YES"
isPrimaryUnsigned := strings.Contains(each.ColumnType, "unsigned")
dt, containsPQ, err := converter.ConvertStringDataType(each.DataType, isDefaultNull, isPrimaryUnsigned, strict)
if err != nil {
return nil, err
}
columnSeqInIndex := 0
if each.Index != nil {
columnSeqInIndex = each.Index.SeqInIndex
}
field := &Field{
NameOriginal: each.Name,
Name: stringx.From(each.Name),
DataType: dt,
Comment: each.Comment,
SeqInIndex: columnSeqInIndex,
OrdinalPosition: each.OrdinalPosition,
ContainsPQ: containsPQ,
}
fieldM[each.Name] = field
}
return fieldM, nil
}