mirror of
https://gitee.com/XM-GO/PandaX.git
synced 2026-04-26 09:29:36 +08:00
65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
package driver
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import (
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"database/sql"
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"fmt"
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"github.com/XM-GO/PandaKit/biz"
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_ "github.com/taosdata/driver-go/v3/taosRestful"
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"pandax/apps/visual/entity"
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)
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func getTdDB(d *entity.VisualDataSource) (*sql.DB, error) {
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dsn := fmt.Sprintf("%s:%s@%s(%s:%d)/%s",
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d.Db.Username, d.Db.Password, "http", d.Db.Host, d.Db.Port, d.Db.Dbname)
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if d.Db.Config != "" {
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dsn = fmt.Sprintf("%s&%s", dsn, d.Db.Config)
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}
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return sql.Open("taosRestful", dsn)
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}
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// ---------------------------------- mysql元数据 -----------------------------------
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const (
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// 表信息元数据
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TD_TABLE_MA = `SELECT table_name table_name,table_comment table_comment from information_schema.INS_TABLES WHERE db_name = '%s'`
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// 表信息
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TD_TABLE_INFO = `SELECT table_name table_name, table_comment table_comment, columns table_rows, create_time create_time
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FROM information_schema.INS_TABLES WHERE db_name = '%s'`
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//列信息元数据
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TD_COLUMN_MA = `SELECT table_name table_name, col_name column_name, col_type column_type,col_nullable nullable from information_schema.INS_COLUMNS
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WHERE db_name = '%s' AND table_name in (%s) ORDER BY table_name`
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)
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type TDMetadata struct {
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di *DbInstance
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}
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// 获取表基础元信息, 如表名等
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func (mm *TDMetadata) GetTables() []map[string]interface{} {
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res, err := mm.di.innerSelect(fmt.Sprintf(TD_TABLE_MA, mm.di.Info.Db.Dbname))
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biz.ErrIsNilAppendErr(err, "获取表基本信息失败: %s")
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return res
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}
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// 获取列元信息, 如列名等
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func (mm *TDMetadata) GetColumns(tableNames ...string) []map[string]interface{} {
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tableName := ""
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for i := 0; i < len(tableNames); i++ {
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if i != 0 {
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tableName = tableName + ", "
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}
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tableName = tableName + "'" + tableNames[i] + "'"
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}
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result, err := mm.di.innerSelect(fmt.Sprintf(TD_COLUMN_MA, mm.di.Info.Db.Dbname, tableName))
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biz.ErrIsNilAppendErr(err, "获取数据库列信息失败: %s")
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return result
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}
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// 获取表信息，比GetTableMetedatas获取更详细的表信息
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func (mm *TDMetadata) GetTableInfos() []map[string]interface{} {
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res, err := mm.di.innerSelect(fmt.Sprintf(TD_TABLE_INFO, mm.di.Info.Db.Dbname))
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biz.ErrIsNilAppendErr(err, "获取表信息失败: %s")
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return res
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}
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