支持tdengine

apps/visual/driver/td_meta.go

@@ -0,0 +1,64 @@
+package driver
+
+import (
+	"database/sql"
+	"fmt"
+	"github.com/XM-GO/PandaKit/biz"
+	_ "github.com/taosdata/driver-go/v3/taosRestful"
+	"pandax/apps/visual/entity"
+)
+
+func getTdDB(d *entity.VisualDataSource) (*sql.DB, error) {
+	dsn := fmt.Sprintf("%s:%s@%s(%s:%d)/%s",
+		d.Db.Username, d.Db.Password, "http", d.Db.Host, d.Db.Port, d.Db.Dbname)
+	if d.Db.Config != "" {
+		dsn = fmt.Sprintf("%s&%s", dsn, d.Db.Config)
+	}
+	return sql.Open("taosRestful", dsn)
+}
+
+// ---------------------------------- mysql元数据 -----------------------------------
+const (
+	// 表信息元数据
+	TD_TABLE_MA = `SELECT table_name table_name,table_comment table_comment from information_schema.INS_TABLES WHERE db_name = '%s'`
+
+	// 表信息
+	TD_TABLE_INFO = `SELECT table_name table_name, table_comment table_comment, columns table_rows, create_time create_time 
+	FROM information_schema.INS_TABLES WHERE db_name = '%s'`
+
+	//列信息元数据
+	TD_COLUMN_MA = `SELECT table_name table_name, col_name column_name, col_type column_type,col_nullable nullable from information_schema.INS_COLUMNS
+	WHERE db_name = '%s' AND table_name in (%s) ORDER BY table_name`
+)
+
+type TDMetadata struct {
+	di *DbInstance
+}
+
+// 获取表基础元信息, 如表名等
+func (mm *TDMetadata) GetTables() []map[string]interface{} {
+	res, err := mm.di.innerSelect(fmt.Sprintf(TD_TABLE_MA, mm.di.Info.Db.Dbname))
+	biz.ErrIsNilAppendErr(err, "获取表基本信息失败: %s")
+	return res
+}
+
+// 获取列元信息, 如列名等
+func (mm *TDMetadata) GetColumns(tableNames ...string) []map[string]interface{} {
+	tableName := ""
+	for i := 0; i < len(tableNames); i++ {
+		if i != 0 {
+			tableName = tableName + ", "
+		}
+		tableName = tableName + "'" + tableNames[i] + "'"
+	}
+	result, err := mm.di.innerSelect(fmt.Sprintf(TD_COLUMN_MA, mm.di.Info.Db.Dbname, tableName))
+	biz.ErrIsNilAppendErr(err, "获取数据库列信息失败: %s")
+	return result
+}
+
+// 获取表信息，比GetTableMetedatas获取更详细的表信息
+func (mm *TDMetadata) GetTableInfos() []map[string]interface{} {
+	res, err := mm.di.innerSelect(fmt.Sprintf(TD_TABLE_INFO, mm.di.Info.Db.Dbname))
+	biz.ErrIsNilAppendErr(err, "获取表信息失败: %s")
+	return res
+}