mirror of
https://gitee.com/dromara/mayfly-go
synced 2025-11-07 09:50:26 +08:00
334 lines
9.8 KiB
Go
334 lines
9.8 KiB
Go
package postgres
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import (
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"fmt"
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"mayfly-go/internal/db/dbm/dbi"
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"mayfly-go/pkg/errorx"
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"mayfly-go/pkg/utils/anyx"
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"mayfly-go/pkg/utils/collx"
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"regexp"
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"strings"
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"time"
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)
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const (
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PGSQL_META_FILE = "metasql/pgsql_meta.sql"
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PGSQL_DB_SCHEMAS = "PGSQL_DB_SCHEMAS"
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PGSQL_TABLE_INFO_KEY = "PGSQL_TABLE_INFO"
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PGSQL_INDEX_INFO_KEY = "PGSQL_INDEX_INFO"
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PGSQL_COLUMN_MA_KEY = "PGSQL_COLUMN_MA"
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PGSQL_TABLE_DDL_KEY = "PGSQL_TABLE_DDL_FUNC"
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PGSQL_TABLE_INFO_BY_NAMES_KEY = "PGSQL_TABLE_INFO_BY_NAMES"
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)
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type PgsqlMetaData struct {
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dbi.DefaultMetaData
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dc *dbi.DbConn
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}
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func (pd *PgsqlMetaData) GetDbServer() (*dbi.DbServer, error) {
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_, res, err := pd.dc.Query("SELECT version() as server_version")
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if err != nil {
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return nil, err
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}
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ds := &dbi.DbServer{
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Version: anyx.ConvString(res[0]["server_version"]),
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}
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return ds, nil
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}
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func (pd *PgsqlMetaData) GetDbNames() ([]string, error) {
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_, res, err := pd.dc.Query("SELECT datname AS dbname FROM pg_database WHERE datistemplate = false AND has_database_privilege(datname, 'CONNECT')")
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if err != nil {
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return nil, err
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}
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databases := make([]string, 0)
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for _, re := range res {
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databases = append(databases, anyx.ConvString(re["dbname"]))
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}
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return databases, nil
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}
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func (pd *PgsqlMetaData) GetTables(tableNames ...string) ([]dbi.Table, error) {
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meta := pd.dc.GetMetaData()
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names := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
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return fmt.Sprintf("'%s'", meta.RemoveQuote(val))
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}), ",")
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var res []map[string]any
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var err error
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if tableNames != nil || len(tableNames) > 0 {
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_, res, err = pd.dc.Query(fmt.Sprintf(dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_TABLE_INFO_BY_NAMES_KEY), names))
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} else {
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_, res, err = pd.dc.Query(dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_TABLE_INFO_KEY))
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}
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if err != nil {
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return nil, err
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}
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tables := make([]dbi.Table, 0)
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for _, re := range res {
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tables = append(tables, dbi.Table{
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TableName: re["tableName"].(string),
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TableComment: anyx.ConvString(re["tableComment"]),
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CreateTime: anyx.ConvString(re["createTime"]),
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TableRows: anyx.ConvInt(re["tableRows"]),
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DataLength: anyx.ConvInt64(re["dataLength"]),
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IndexLength: anyx.ConvInt64(re["indexLength"]),
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})
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}
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return tables, nil
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}
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// 获取列元信息, 如列名等
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func (pd *PgsqlMetaData) GetColumns(tableNames ...string) ([]dbi.Column, error) {
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meta := pd.dc.GetMetaData()
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tableName := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
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return fmt.Sprintf("'%s'", meta.RemoveQuote(val))
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}), ",")
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_, res, err := pd.dc.Query(fmt.Sprintf(dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_COLUMN_MA_KEY), tableName))
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if err != nil {
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return nil, err
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}
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columns := make([]dbi.Column, 0)
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for _, re := range res {
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columns = append(columns, dbi.Column{
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TableName: anyx.ConvString(re["tableName"]),
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ColumnName: anyx.ConvString(re["columnName"]),
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ColumnType: anyx.ConvString(re["columnType"]),
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ColumnComment: anyx.ConvString(re["columnComment"]),
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Nullable: anyx.ConvString(re["nullable"]),
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IsPrimaryKey: anyx.ConvInt(re["isPrimaryKey"]) == 1,
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IsIdentity: anyx.ConvInt(re["isIdentity"]) == 1,
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ColumnDefault: anyx.ConvString(re["columnDefault"]),
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NumScale: anyx.ConvString(re["numScale"]),
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})
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}
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return columns, nil
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}
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func (pd *PgsqlMetaData) GetPrimaryKey(tablename string) (string, error) {
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columns, err := pd.GetColumns(tablename)
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if err != nil {
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return "", err
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}
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if len(columns) == 0 {
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return "", errorx.NewBiz("[%s] 表不存在", tablename)
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}
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for _, v := range columns {
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if v.IsPrimaryKey {
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return v.ColumnName, nil
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}
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}
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return columns[0].ColumnName, nil
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}
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// 获取表索引信息
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func (pd *PgsqlMetaData) GetTableIndex(tableName string) ([]dbi.Index, error) {
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_, res, err := pd.dc.Query(fmt.Sprintf(dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_INDEX_INFO_KEY), tableName))
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if err != nil {
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return nil, err
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}
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indexs := make([]dbi.Index, 0)
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for _, re := range res {
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indexs = append(indexs, dbi.Index{
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IndexName: anyx.ConvString(re["indexName"]),
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ColumnName: anyx.ConvString(re["columnName"]),
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IndexType: anyx.ConvString(re["IndexType"]),
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IndexComment: anyx.ConvString(re["indexComment"]),
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IsUnique: anyx.ConvInt(re["isUnique"]) == 1,
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SeqInIndex: anyx.ConvInt(re["seqInIndex"]),
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})
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}
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// 把查询结果以索引名分组，索引字段以逗号连接
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result := make([]dbi.Index, 0)
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key := ""
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for _, v := range indexs {
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// 当前的索引名
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in := v.IndexName
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if key == in {
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// 索引字段已根据名称和顺序排序，故取最后一个即可
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i := len(result) - 1
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// 同索引字段以逗号连接
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result[i].ColumnName = result[i].ColumnName + "," + v.ColumnName
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} else {
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key = in
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result = append(result, v)
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}
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}
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return result, nil
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}
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// 获取建表ddl
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func (pd *PgsqlMetaData) GetTableDDL(tableName string) (string, error) {
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_, err := pd.dc.Exec(dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_TABLE_DDL_KEY))
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if err != nil {
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return "", err
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}
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ddlSql := fmt.Sprintf("select showcreatetable('%s','%s') as sql", pd.dc.Info.CurrentSchema(), tableName)
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_, res, err := pd.dc.Query(ddlSql)
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if err != nil {
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return "", err
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}
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return res[0]["sql"].(string), nil
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}
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// 获取pgsql当前连接的库可访问的schemaNames
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func (pd *PgsqlMetaData) GetSchemas() ([]string, error) {
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sql := dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_DB_SCHEMAS)
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_, res, err := pd.dc.Query(sql)
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if err != nil {
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return nil, err
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}
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schemaNames := make([]string, 0)
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for _, re := range res {
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schemaNames = append(schemaNames, anyx.ConvString(re["schemaName"]))
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}
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return schemaNames, nil
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}
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func (pd *PgsqlMetaData) DefaultDb() string {
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switch pd.dc.Info.Type {
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case dbi.DbTypePostgres, dbi.DbTypeGauss:
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return "postgres"
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case dbi.DbTypeKingbaseEs:
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return "security"
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case dbi.DbTypeVastbase:
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return "vastbase"
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default:
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return ""
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}
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}
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func (pd *PgsqlMetaData) GetDataConverter() dbi.DataConverter {
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return converter
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}
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var (
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// 数字类型
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numberRegexp = regexp.MustCompile(`(?i)int|double|float|number|decimal|byte|bit`)
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// 日期时间类型
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datetimeRegexp = regexp.MustCompile(`(?i)datetime|timestamp`)
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// 日期类型
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dateRegexp = regexp.MustCompile(`(?i)date`)
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// 时间类型
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timeRegexp = regexp.MustCompile(`(?i)time`)
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// 定义正则表达式，匹配括号内的数字
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bracketsRegexp = regexp.MustCompile(`\((\d+)\)`)
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converter = new(DataConverter)
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// pgsql数据类型 映射 公共数据类型
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commonColumnTypeMap = map[string]string{
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"int2": dbi.CommonTypeSmallint,
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"int4": dbi.CommonTypeInt,
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"int8": dbi.CommonTypeBigint,
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"numeric": dbi.CommonTypeNumber,
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"decimal": dbi.CommonTypeNumber,
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"smallserial": dbi.CommonTypeSmallint,
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"serial": dbi.CommonTypeInt,
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"bigserial": dbi.CommonTypeBigint,
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"largeserial": dbi.CommonTypeBigint,
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"money": dbi.CommonTypeNumber,
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"bool": dbi.CommonTypeTinyint,
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"char": dbi.CommonTypeChar,
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"character": dbi.CommonTypeChar,
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"nchar": dbi.CommonTypeChar,
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"varchar": dbi.CommonTypeVarchar,
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"text": dbi.CommonTypeText,
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"bytea": dbi.CommonTypeBinary,
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"date": dbi.CommonTypeDate,
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"time": dbi.CommonTypeTime,
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"timestamp": dbi.CommonTypeTimestamp,
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}
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// 公共数据类型 映射 pgsql数据类型
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pgsqlColumnTypeMap = map[string]string{
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dbi.CommonTypeVarchar: "varchar",
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dbi.CommonTypeChar: "char",
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dbi.CommonTypeText: "text",
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dbi.CommonTypeBlob: "text",
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dbi.CommonTypeLongblob: "text",
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dbi.CommonTypeLongtext: "text",
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dbi.CommonTypeBinary: "bytea",
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dbi.CommonTypeMediumblob: "text",
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dbi.CommonTypeMediumtext: "text",
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dbi.CommonTypeVarbinary: "bytea",
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dbi.CommonTypeInt: "int4",
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dbi.CommonTypeSmallint: "int2",
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dbi.CommonTypeTinyint: "int2",
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dbi.CommonTypeNumber: "numeric",
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dbi.CommonTypeBigint: "int8",
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dbi.CommonTypeDatetime: "timestamp",
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dbi.CommonTypeDate: "date",
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dbi.CommonTypeTime: "time",
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dbi.CommonTypeTimestamp: "timestamp",
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dbi.CommonTypeEnum: "varchar(2000)",
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dbi.CommonTypeJSON: "varchar(2000)",
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}
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)
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type DataConverter struct {
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}
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func (dc *DataConverter) GetDataType(dbColumnType string) dbi.DataType {
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if numberRegexp.MatchString(dbColumnType) {
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return dbi.DataTypeNumber
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}
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// 日期时间类型
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if datetimeRegexp.MatchString(dbColumnType) {
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return dbi.DataTypeDateTime
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}
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// 日期类型
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if dateRegexp.MatchString(dbColumnType) {
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return dbi.DataTypeDate
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}
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// 时间类型
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if timeRegexp.MatchString(dbColumnType) {
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return dbi.DataTypeTime
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}
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return dbi.DataTypeString
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}
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func (dc *DataConverter) FormatData(dbColumnValue any, dataType dbi.DataType) string {
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str := fmt.Sprintf("%v", dbColumnValue)
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switch dataType {
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case dbi.DataTypeDateTime: // "2024-01-02T22:16:28.545377+08:00"
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res, _ := time.Parse(time.RFC3339, str)
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return res.Format(time.DateTime)
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case dbi.DataTypeDate: // "2024-01-02T00:00:00Z"
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res, _ := time.Parse(time.RFC3339, str)
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return res.Format(time.DateOnly)
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case dbi.DataTypeTime: // "0000-01-01T22:16:28.545075+08:00"
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res, _ := time.Parse(time.RFC3339, str)
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return res.Format(time.TimeOnly)
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}
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return anyx.ConvString(dbColumnValue)
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}
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func (dc *DataConverter) ParseData(dbColumnValue any, dataType dbi.DataType) any {
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// 如果dataType是datetime而dbColumnValue是string类型，则需要转换为time.Time类型
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_, ok := dbColumnValue.(string)
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if dataType == dbi.DataTypeDateTime && ok {
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res, _ := time.Parse(time.RFC3339, anyx.ToString(dbColumnValue))
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return res
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}
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if dataType == dbi.DataTypeDate && ok {
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res, _ := time.Parse(time.DateOnly, anyx.ToString(dbColumnValue))
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return res
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}
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if dataType == dbi.DataTypeTime && ok {
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res, _ := time.Parse(time.TimeOnly, anyx.ToString(dbColumnValue))
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return res
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}
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return dbColumnValue
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}
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