mirror of
https://gitee.com/XM-GO/PandaX.git
synced 2026-04-23 02:48:34 +08:00
66 lines
2.2 KiB
Go
66 lines
2.2 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/go-sql-driver/mysql"
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"pandax/apps/visual/entity"
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)
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func getClickHouseDB(d *entity.VisualDataSource) (*sql.DB, error) {
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// 设置dataSourceName -> 更多参数参考：https://github.com/go-sql-driver/mysql#dsn-data-source-name
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dsn := fmt.Sprintf("%s:%s@%s(%s:%d)/%s?timeout=8s",
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d.Db.Username, d.Db.Password, "tcp", 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("mysql", 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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ClickHouse_TABLE_MA = `SELECT name tableName, comment tableComment from system.tables WHERE database = '%s'`
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// 表信息
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ClickHouse_TABLE_INFO = `SELECT name tableName, comment tableComment, total_rows tableRows
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FROM system.tables WHERE database = '%s'`
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// 列信息元数据
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ClickHouse_COLUMN_MA = `SELECT table tableName, name columnName, type columnType, comment columnComment from system.columns
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WHERE database='%s' AND table in (%s) ORDER BY table`
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)
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type ClickHouseMetadata 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 *ClickHouseMetadata) GetTables() []map[string]interface{} {
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res, err := mm.di.innerSelect(fmt.Sprintf(ClickHouse_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 *ClickHouseMetadata) 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(ClickHouse_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 *ClickHouseMetadata) GetTableInfos() []map[string]interface{} {
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res, err := mm.di.innerSelect(fmt.Sprintf(ClickHouse_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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