mirror of
https://gitee.com/dromara/mayfly-go
synced 2025-11-04 16:30:25 +08:00
264 lines
8.7 KiB
Go
264 lines
8.7 KiB
Go
|
package postgres
|
|||
|
|
|
|||
|
|
import (
|
|||
|
|
"fmt"
|
|||
|
|
"mayfly-go/internal/db/dbm/dbi"
|
|||
|
|
"mayfly-go/pkg/utils/anyx"
|
|||
|
|
"mayfly-go/pkg/utils/collx"
|
|||
|
|
"strings"
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
type SQLGenerator struct {
|
|||
|
|
dialect dbi.Dialect
|
|||
|
|
|
|||
|
|
dc *dbi.DbConn
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
func (msg *SQLGenerator) GenTableDDL(table dbi.Table, columns []dbi.Column, dropBeforeCreate bool) []string {
|
|||
|
|
quoter := msg.dialect.Quoter()
|
|||
|
|
quote := quoter.Quote
|
|||
|
|
quoteTableName := quote(table.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, quote(column.ColumnName))
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
fields = append(fields, msg.genColumnBasicSql(quoter, column))
|
|||
|
|
|
|||
|
|
// 防止注释内含有特殊字符串导致sql出错
|
|||
|
|
if column.ColumnComment != "" {
|
|||
|
|
comment := dbi.QuoteEscape(column.ColumnComment)
|
|||
|
|
columnComments = append(columnComments, fmt.Sprintf(commentTmp, quoteTableName, quote(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 table.TableComment != "" {
|
|||
|
|
commentTmp := "COMMENT ON TABLE %s IS '%s'"
|
|||
|
|
tableCommentSql = fmt.Sprintf(commentTmp, quoteTableName, dbi.QuoteEscape(table.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 (msg *SQLGenerator) GenIndexDDL(table dbi.Table, indexs []dbi.Index) []string {
|
|||
|
|
quoter := msg.dialect.Quoter()
|
|||
|
|
quote := quoter.Quote
|
|||
|
|
|
|||
|
|
creates := make([]string, 0)
|
|||
|
|
drops := make([]string, 0)
|
|||
|
|
comments := make([]string, 0)
|
|||
|
|
for _, index := range indexs {
|
|||
|
|
unique := ""
|
|||
|
|
if index.IsUnique {
|
|||
|
|
unique = " unique"
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
currentSchema := msg.dc.Info.CurrentSchema()
|
|||
|
|
// 带上后缀. 避免后续判断
|
|||
|
|
if currentSchema != "" {
|
|||
|
|
currentSchema = quote(currentSchema) + "."
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// 如果索引名存在，先删除索引
|
|||
|
|
drops = append(drops, fmt.Sprintf("DROP INDEX IF EXISTS %s%s", 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] = quote(name)
|
|||
|
|
}
|
|||
|
|
// 创建索引
|
|||
|
|
creates = append(creates, fmt.Sprintf("CREATE%s INDEX %s ON %s%s(%s)", unique, quote(index.IndexName), currentSchema, quote(table.TableName), strings.Join(colNames, ",")))
|
|||
|
|
if index.IndexComment != "" {
|
|||
|
|
comment := dbi.QuoteEscape(index.IndexComment)
|
|||
|
|
comments = append(comments, fmt.Sprintf("COMMENT ON INDEX %s%s IS '%s'", 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 (psg *SQLGenerator) GenInsert(tableName string, columns []dbi.Column, values [][]any, duplicateStrategy int) []string {
|
|||
|
|
insertSql := dbi.GenCommonInsert(psg.dialect, psg.dc.Info.Type, tableName, columns, values)
|
|||
|
|
|
|||
|
|
// 根据冲突策略生成后缀
|
|||
|
|
suffix := ""
|
|||
|
|
if psg.dc.Info.Type == 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 = psg.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 = psg.pgsqlOnDuplicateStrategySql(duplicateStrategy, tableName, columns)
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return collx.AsArray[string](insertSql + suffix)
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// pgsql默认唯一键冲突策略
|
|||
|
|
func (psg *SQLGenerator) pgsqlOnDuplicateStrategySql(duplicateStrategy int, tableName string, columns []dbi.Column) 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.ColumnName, col.ColumnName))
|
|||
|
|
}
|
|||
|
|
// 查询唯一键名,拼接冲突sql
|
|||
|
|
_, keyRes, _ := psg.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') ", psg.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 (psg *SQLGenerator) gaussOnDuplicateStrategySql(duplicateStrategy int, tableName string, columns []dbi.Column) string {
|
|||
|
|
suffix := ""
|
|||
|
|
metadata := psg.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, psg.dialect.Quoter().Trim(strings.ToLower(col.ColumnName))) {
|
|||
|
|
suffix += fmt.Sprintf("%s = excluded.%s", col.ColumnName, col.ColumnName)
|
|||
|
|
if i < len(columns)-1 {
|
|||
|
|
suffix += ", "
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return suffix
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
func (pd *SQLGenerator) genColumnBasicSql(quoter dbi.Quoter, column dbi.Column) string {
|
|||
|
|
colName := quoter.Quote(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
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// 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)
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
columnSql := fmt.Sprintf(" %s %s%s%s", colName, column.GetColumnType(), nullAble, defVal)
|
|||
|
|
return columnSql
|
|||
|
|
}
|