支持tdengine

apps/visual/driver/click_house_meta.go

@@ -0,0 +1,65 @@
+package driver
+
+import (
+	"database/sql"
+	"fmt"
+	"github.com/XM-GO/PandaKit/biz"
+	_ "github.com/go-sql-driver/mysql"
+	"pandax/apps/visual/entity"
+)
+
+func getClickHouseDB(d *entity.VisualDataSource) (*sql.DB, error) {
+	// 设置dataSourceName  -> 更多参数参考：https://github.com/go-sql-driver/mysql#dsn-data-source-name
+	dsn := fmt.Sprintf("%s:%s@%s(%s:%d)/%s?timeout=8s",
+		d.Db.Username, d.Db.Password, "tcp", 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("mysql", dsn)
+}
+
+// ---------------------------------- mysql元数据 -----------------------------------
+const (
+	// 表信息元数据
+	ClickHouse_TABLE_MA = `SELECT name tableName, comment tableComment from system.tables WHERE database = '%s'`
+
+	// 表信息
+	ClickHouse_TABLE_INFO = `SELECT name tableName, comment tableComment, total_rows tableRows
+	FROM system.tables WHERE database = '%s'`
+
+	// 列信息元数据
+	ClickHouse_COLUMN_MA = `SELECT table tableName, name columnName, type columnType, comment columnComment from system.columns
+	WHERE database='%s' AND table in (%s) ORDER BY table`
+)
+
+type ClickHouseMetadata struct {
+	di *DbInstance
+}
+
+// 获取表基础元信息, 如表名等
+func (mm *ClickHouseMetadata) GetTables() []map[string]interface{} {
+	res, err := mm.di.innerSelect(fmt.Sprintf(ClickHouse_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 *ClickHouseMetadata) 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(ClickHouse_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 *ClickHouseMetadata) GetTableInfos() []map[string]interface{} {
+	res, err := mm.di.innerSelect(fmt.Sprintf(ClickHouse_TABLE_INFO, mm.di.Info.Db.Dbname))
+	biz.ErrIsNilAppendErr(err, "获取表信息失败: %s")
+	return res
+}