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								package dbi
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								import (
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									"database/sql"
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									"embed"
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									"strings"
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									"mayfly-go/pkg/biz"
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									"mayfly-go/pkg/utils/collx"
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									"mayfly-go/pkg/utils/stringx"
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								)
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								type DataType string
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								const (
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									DataTypeString   DataType = "string"
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									DataTypeNumber   DataType = "number"
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									DataTypeDate     DataType = "date"
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									DataTypeTime     DataType = "time"
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									DataTypeDateTime DataType = "datetime"
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								const (
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									// -1. 无操作
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									DuplicateStrategyNone = -1
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									// 1. 忽略
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									DuplicateStrategyIgnore = 1
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									// 2. 更新
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									DuplicateStrategyUpdate = 2
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								)
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								// 数据库服务实例信息
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								type DbServer struct {
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									Version string  `json:"version"` // 版本信息
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									Extra   collx.M `json:"extra"`   // 其他额外信息
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								}
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								// 表信息
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								type Table struct {
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									TableName    string `json:"tableName"`    // 表名
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									TableComment string `json:"tableComment"` // 表备注
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									CreateTime   string `json:"createTime"`   // 创建时间
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									TableRows    int    `json:"tableRows"`
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									DataLength   int64  `json:"dataLength"`
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									IndexLength  int64  `json:"indexLength"`
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								}
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								// 表的列信息
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								type Column struct {
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									TableName     string  `json:"tableName"`     // 表名
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									ColumnName    string  `json:"columnName"`    // 列名
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									ColumnType    string  `json:"columnType"`    // 列类型
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									ColumnComment string  `json:"columnComment"` // 列备注
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									IsPrimaryKey  bool    `json:"isPrimaryKey"`  // 是否为主键
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									IsIdentity    bool    `json:"isIdentity"`    // 是否自增
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									ColumnDefault string  `json:"columnDefault"` // 默认值
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									Nullable      string  `json:"nullable"`      // 是否可为null
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									NumScale      string  `json:"numScale"`      // 小数点
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									Extra         collx.M `json:"extra"`         // 其他额外信息
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								}
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								// 表索引信息
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								type Index struct {
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									IndexName    string `json:"indexName"`    // 索引名
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									ColumnName   string `json:"columnName"`   // 列名
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									IndexType    string `json:"indexType"`    // 索引类型
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									IndexComment string `json:"indexComment"` // 备注
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									SeqInIndex   int    `json:"seqInIndex"`
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									IsUnique     bool   `json:"isUnique"`
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								}
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								type DbCopyTable struct {
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									Id        uint64 `json:"id"`
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									Db        string `json:"db" `
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									TableName string `json:"tableName"`
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									CopyData  bool   `json:"copyData"` // 是否复制数据
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								}
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								// 数据转换器
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								type DataConverter interface {
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									// 获取数据对应的类型
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									// @param dbColumnType 数据库原始列类型,如varchar等
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									GetDataType(dbColumnType string) DataType
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									// 根据数据类型格式化指定数据
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									FormatData(dbColumnValue any, dataType DataType) string
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									// 根据数据类型解析数据为符合要求的指定类型等
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									ParseData(dbColumnValue any, dataType DataType) any
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								}
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								// -----------------------------------元数据接口定义------------------------------------------
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								// 数据库方言、元信息接口(表、列、获取表数据等元信息)
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								type Dialect interface {
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									// 获取数据库服务实例信息
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									GetDbServer() (*DbServer, error)
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									// 获取数据库名称列表
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									GetDbNames() ([]string, error)
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									// 获取表信息
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									GetTables() ([]Table, error)
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									// 获取指定表名的所有列元信息
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									GetColumns(tableNames ...string) ([]Column, error)
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									// 获取表主键字段名,没有主键标识则默认第一个字段
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									GetPrimaryKey(tableName string) (string, error)
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									// 获取表索引信息
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									GetTableIndex(tableName string) ([]Index, error)
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									// 获取建表ddl
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									GetTableDDL(tableName string) (string, error)
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											2022-12-17 22:24:21 +08:00
										 
									 
								 
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									GetSchemas() ([]string, error)
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											2024-01-05 08:55:34 +08:00
										 
									 
								 
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									// GetDbProgram 获取数据库程序模块,用于数据库备份与恢复
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											2024-02-06 07:16:56 +00:00
										 
									 
								 
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									GetDbProgram() (DbProgram, error)
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											2024-01-05 05:31:32 +00:00
										 
									 
								 
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									// 批量保存数据
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											2024-03-01 04:03:03 +00:00
										 
									 
								 
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									BatchInsert(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error)
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											2024-01-05 05:31:32 +00:00
										 
									 
								 
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											2024-01-24 17:01:17 +08:00
										 
									 
								 
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									// 获取数据转换器用于解析格式化列数据等
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											2024-01-24 08:29:16 +00:00
										 
									 
								 
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									GetDataConverter() DataConverter
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											2024-01-23 04:08:02 +00:00
										 
									 
								 
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									CopyTable(copy *DbCopyTable) error
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											2022-10-15 17:38:34 +08:00
										 
									 
								 
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								}
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											2023-05-24 12:32:17 +08:00
										 
									 
								 
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								// ------------------------- 元数据sql操作 -------------------------
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								//
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								//go:embed metasql/*
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								var metasql embed.FS
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								// sql缓存 key: sql备注的key 如:MYSQL_TABLE_MA  value: sql内容
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								var sqlCache = make(map[string]string, 20)
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								// 获取本地文件的sql内容,并进行解析,获取对应key的sql内容
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								func GetLocalSql(file, key string) string {
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									sql := sqlCache[key]
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									if sql != "" {
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										return sql
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									}
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									bytes, err := metasql.ReadFile(file)
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									biz.ErrIsNilAppendErr(err, "获取sql meta文件内容失败: %s")
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									allSql := string(bytes)
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											2023-06-17 16:04:21 +08:00
										 
									 
								 
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									sqls := strings.Split(allSql, "---------------------------------------")
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											2023-05-24 12:32:17 +08:00
										 
									 
								 
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									var resSql string
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									for _, sql := range sqls {
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											2023-07-21 17:07:04 +08:00
										 
									 
								 
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										sql = stringx.TrimSpaceAndBr(sql)
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											2023-05-24 12:32:17 +08:00
										 
									 
								 
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										// 获取sql第一行的sql备注信息如:--MYSQL_TABLE_MA 表信息元数据
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										info := strings.SplitN(sql, "\n", 2)
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										// 原始sql,即去除第一行的key与备注信息
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										rowSql := info[1]
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										// 获取sql key;如:MYSQL_TABLE_MA
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										sqlKey := strings.Split(strings.Split(info[0], " ")[0], "--")[1]
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										if key == sqlKey {
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											resSql = rowSql
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										}
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										sqlCache[sqlKey] = rowSql
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									}
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									return resSql
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								}
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