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refactor: dbm

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This commit is contained in:
meilin.huang
2024-12-08 13:04:23 +08:00
parent ebc89e056f
commit e56788af3e
152 changed files with 4273 additions and 3715 deletions
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282
server/internal/db/dbm/postgres/dialect.go
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@@ -1,12 +1,8 @@
package postgres
import (
"database/sql"
"fmt"
"mayfly-go/internal/db/dbm/dbi"
"mayfly-go/pkg/utils/anyx"
"mayfly-go/pkg/utils/collx"
"strings"
"time"
"github.com/may-fly/cast"
@@ -18,107 +14,6 @@ type PgsqlDialect struct {
dc *dbi.DbConn
}
func (pd *PgsqlDialect) BatchInsert(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error) {
// 执行批量insert sql，跟mysql一样 pg或高斯支持批量insert语法
// insert into table_name (column1, column2, ...) values (value1, value2, ...), (value1, value2, ...), ...
// 把二维数组转为一维数组
var args []any
for _, v := range values {
args = append(args, v...)
}
// 构建占位符字符串 "($1, $2, $3), ($4, $5, $6), ..." 用于指定参数
var placeholders []string
for i := 0; i < len(args); i += len(columns) {
var placeholder []string
for j := 0; j < len(columns); j++ {
placeholder = append(placeholder, fmt.Sprintf("$%d", i+j+1))
}
placeholders = append(placeholders, "("+strings.Join(placeholder, ", ")+")")
}
// 根据冲突策略生成后缀
suffix := ""
if pd.dc.Info.Type == dbi.DbTypeGauss {
// 高斯db使用ON DUPLICATE KEY UPDATE 语法参考 https://support.huaweicloud.com/distributed-devg-v3-gaussdb/gaussdb-12-0607.html#ZH-CN_TOPIC_0000001633948138
suffix = pd.gaussOnDuplicateStrategySql(duplicateStrategy, tableName, columns)
} else {
// pgsql 默认使用 on conflict 语法参考 http://www.postgres.cn/docs/12/sql-insert.html
// vastbase语法参考 https://docs.vastdata.com.cn/zh/docs/VastbaseE100Ver3.0.0/doc/SQL%E8%AF%AD%E6%B3%95/INSERT.html
// kingbase语法参考 https://help.kingbase.com.cn/v8/development/sql-plsql/sql/SQL_Statements_9.html#insert
suffix = pd.pgsqlOnDuplicateStrategySql(duplicateStrategy, tableName, columns)
}
sqlStr := fmt.Sprintf("insert into %s (%s) values %s %s", pd.QuoteIdentifier(tableName), strings.Join(columns, ","), strings.Join(placeholders, ", "), suffix)
// 执行批量insert sql
return pd.dc.TxExec(tx, sqlStr, args...)
}
// pgsql默认唯一键冲突策略
func (pd *PgsqlDialect) pgsqlOnDuplicateStrategySql(duplicateStrategy int, tableName string, columns []string) string {
suffix := ""
if duplicateStrategy == dbi.DuplicateStrategyIgnore {
suffix = " \n on conflict do nothing"
} else if duplicateStrategy == dbi.DuplicateStrategyUpdate {
// 生成 on conflict () do update set column1 = excluded.column1, column2 = excluded.column2, ...
var updateColumns []string
for _, col := range columns {
updateColumns = append(updateColumns, fmt.Sprintf("%s = excluded.%s", col, col))
}
// 查询唯一键名,拼接冲突sql
_, keyRes, _ := pd.dc.Query("SELECT constraint_name FROM information_schema.table_constraints WHERE constraint_schema = $1 AND table_name = $2 AND constraint_type in ('PRIMARY KEY', 'UNIQUE') ", pd.dc.Info.CurrentSchema(), tableName)
if len(keyRes) > 0 {
for _, re := range keyRes {
key := anyx.ToString(re["constraint_name"])
if key != "" {
suffix += fmt.Sprintf(" \n on conflict on constraint %s do update set %s \n", key, strings.Join(updateColumns, ", "))
}
}
}
}
return suffix
}
// 高斯db唯一键冲突策略,使用ON DUPLICATE KEY UPDATE 参考：https://support.huaweicloud.com/distributed-devg-v3-gaussdb/gaussdb-12-0607.html#ZH-CN_TOPIC_0000001633948138
func (pd *PgsqlDialect) gaussOnDuplicateStrategySql(duplicateStrategy int, tableName string, columns []string) string {
suffix := ""
metadata := pd.dc.GetMetadata()
if duplicateStrategy == dbi.DuplicateStrategyIgnore {
suffix = " \n ON DUPLICATE KEY UPDATE NOTHING"
} else if duplicateStrategy == dbi.DuplicateStrategyUpdate {
// 查出表里的唯一键涉及的字段
var uniqueColumns []string
indexs, err := metadata.GetTableIndex(tableName)
if err == nil {
for _, index := range indexs {
if index.IsUnique {
cols := strings.Split(index.ColumnName, ",")
for _, col := range cols {
if !collx.ArrayContains(uniqueColumns, strings.ToLower(col)) {
uniqueColumns = append(uniqueColumns, strings.ToLower(col))
}
}
}
}
}
suffix = " \n ON DUPLICATE KEY UPDATE "
for i, col := range columns {
// ON DUPLICATE KEY UPDATE语句不支持更新唯一键字段，所以得去掉
if !collx.ArrayContains(uniqueColumns, pd.RemoveQuote(strings.ToLower(col))) {
suffix += fmt.Sprintf("%s = excluded.%s", col, col)
if i < len(columns)-1 {
suffix += ", "
}
}
}
}
return suffix
}
func (pd *PgsqlDialect) CopyTable(copy *dbi.DbCopyTable) error {
tableName := copy.TableName
// 生成新表名,为老表明+_copy_时间戳
@@ -176,182 +71,13 @@ func (pd *PgsqlDialect) CopyTable(copy *dbi.DbCopyTable) error {
return err
}
func (pd *PgsqlDialect) GenerateTableDDL(columns []dbi.Column, tableInfo dbi.Table, dropBeforeCreate bool) []string {
quoteTableName := pd.QuoteIdentifier(tableInfo.TableName)
sqlArr := make([]string, 0)
if dropBeforeCreate {
sqlArr = append(sqlArr, fmt.Sprintf("DROP TABLE IF EXISTS %s", quoteTableName))
}
// 组装建表语句
createSql := fmt.Sprintf("CREATE TABLE %s (\n", quoteTableName)
fields := make([]string, 0)
pks := make([]string, 0)
columnComments := make([]string, 0)
commentTmp := "comment on column %s.%s is '%s'"
for _, column := range columns {
if column.IsPrimaryKey {
pks = append(pks, pd.QuoteIdentifier(column.ColumnName))
}
fields = append(fields, pd.genColumnBasicSql(column))
// 防止注释内含有特殊字符串导致sql出错
if column.ColumnComment != "" {
comment := pd.QuoteEscape(column.ColumnComment)
columnComments = append(columnComments, fmt.Sprintf(commentTmp, quoteTableName, pd.QuoteIdentifier(column.ColumnName), comment))
}
}
createSql += strings.Join(fields, ",\n")
if len(pks) > 0 {
createSql += fmt.Sprintf(", \nPRIMARY KEY (%s)", strings.Join(pks, ","))
}
createSql += "\n)"
tableCommentSql := ""
if tableInfo.TableComment != "" {
commentTmp := "comment on table %s is '%s'"
tableCommentSql = fmt.Sprintf(commentTmp, quoteTableName, pd.QuoteEscape(tableInfo.TableComment))
}
// create
sqlArr = append(sqlArr, createSql)
// table comment
if tableCommentSql != "" {
sqlArr = append(sqlArr, tableCommentSql)
}
// column comment
if len(columnComments) > 0 {
sqlArr = append(sqlArr, columnComments...)
}
return sqlArr
}
func (pd *PgsqlDialect) GenerateIndexDDL(indexs []dbi.Index, tableInfo dbi.Table) []string {
creates := make([]string, 0)
drops := make([]string, 0)
comments := make([]string, 0)
for _, index := range indexs {
unique := ""
if index.IsUnique {
unique = "unique"
}
// 如果索引名存在，先删除索引
drops = append(drops, fmt.Sprintf("drop index if exists %s.%s", pd.dc.Info.CurrentSchema(), index.IndexName))
// 取出列名，添加引号
cols := strings.Split(index.ColumnName, ",")
colNames := make([]string, len(cols))
for i, name := range cols {
colNames[i] = pd.QuoteIdentifier(name)
}
// 创建索引
creates = append(creates, fmt.Sprintf("CREATE %s INDEX %s on %s.%s(%s)", unique, pd.QuoteIdentifier(index.IndexName), pd.QuoteIdentifier(pd.dc.Info.CurrentSchema()), pd.QuoteIdentifier(tableInfo.TableName), strings.Join(colNames, ",")))
if index.IndexComment != "" {
comment := pd.QuoteEscape(index.IndexComment)
comments = append(comments, fmt.Sprintf("COMMENT ON INDEX %s.%s IS '%s'", pd.dc.Info.CurrentSchema(), index.IndexName, comment))
}
}
sqlArr := make([]string, 0)
if len(drops) > 0 {
sqlArr = append(sqlArr, drops...)
}
if len(creates) > 0 {
sqlArr = append(sqlArr, creates...)
}
if len(comments) > 0 {
sqlArr = append(sqlArr, comments...)
}
return sqlArr
}
func (pd *PgsqlDialect) UpdateSequence(tableName string, columns []dbi.Column) {
for _, column := range columns {
if column.IsIdentity {
_, _ = pd.dc.Exec(fmt.Sprintf("select setval('%s_%s_seq', (SELECT max(%s) from %s))", tableName, column.ColumnName, column.ColumnName, tableName))
}
}
}
func (pd *PgsqlDialect) GetDataHelper() dbi.DataHelper {
return dataHelper
}
func (pd *PgsqlDialect) GetColumnHelper() dbi.ColumnHelper {
return columnHelper
}
func (pd *PgsqlDialect) GetDumpHelper() dbi.DumpHelper {
return new(DumpHelper)
}
func (pd *PgsqlDialect) genColumnBasicSql(column dbi.Column) string {
colName := pd.QuoteIdentifier(column.ColumnName)
dataType := string(column.DataType)
// 如果数据类型是数字，则去掉长度
if collx.ArrayAnyMatches([]string{"int"}, strings.ToLower(dataType)) {
column.NumPrecision = 0
column.CharMaxLength = 0
func (md *PgsqlDialect) GetSQLGenerator() dbi.SQLGenerator {
return &SQLGenerator{
dialect: md,
dc: md.dc,
}
// 如果是自增类型，需要转换为serial
if column.IsIdentity {
if dataType == "int4" {
column.DataType = "serial"
} else if dataType == "int2" {
column.DataType = "smallserial"
} else if dataType == "int8" {
column.DataType = "bigserial"
} else {
column.DataType = "bigserial"
}
return fmt.Sprintf(" %s %s NOT NULL", colName, column.GetColumnType())
}
nullAble := ""
if !column.Nullable {
nullAble = " NOT NULL"
}
defVal := "" // 默认值需要判断引号，如函数是不需要引号的 // 为了防止跨源函数不支持 当默认值是函数时，不需要设置默认值
if column.ColumnDefault != "" && !strings.Contains(column.ColumnDefault, "(") {
mark := false
// 哪些字段类型默认值需要加引号
if collx.ArrayAnyMatches([]string{"char", "text", "date", "time", "lob"}, dataType) {
// 当数据类型是日期时间，默认值是日期时间函数时，默认值不需要引号
if collx.ArrayAnyMatches([]string{"date", "time"}, strings.ToLower(dataType)) &&
collx.ArrayAnyMatches([]string{"date", "time"}, strings.ToLower(column.ColumnDefault)) {
mark = false
} else {
mark = true
}
}
// 如果数据类型是日期时间，则写死默认值函数
if collx.ArrayAnyMatches([]string{"date", "time"}, strings.ToLower(dataType)) {
column.ColumnDefault = "CURRENT_TIMESTAMP"
}
if mark {
defVal = fmt.Sprintf(" DEFAULT '%s'", column.ColumnDefault)
} else {
defVal = fmt.Sprintf(" DEFAULT %s", column.ColumnDefault)
}
}
// 如果是varchar，长度翻倍，防止报错
if collx.ArrayAnyMatches([]string{"char"}, strings.ToLower(dataType)) {
column.CharMaxLength = column.CharMaxLength * 2
}
columnSql := fmt.Sprintf(" %s %s%s%s", colName, column.GetColumnType(), nullAble, defVal)
return columnSql
}