有没有可以直接导出建表脚本的语句？

Posted 2023-02-16

【中文标题】有没有可以直接导出建表脚本的语句？

【英文标题】：Are there any statements that can directly export the table creation scripts?

【发布时间】：2021-11-12 20:02:53

【问题描述】：

我们在后台有表格。我们想在另一台机器上创建一个新表。

【参考方案1】：

您可以使用以下自定义函数进行导出：

/* @input  dbName: database name
 *         tableName: table name
 *  @output: information from creating the table
 *  @note
 *         
*/
def getDDL(dbName,tableName)
    //table not exist warning
    if(!existsTable(dbName,tableName))
        return "Please check whether the table exists"
        
    //Fields and field types
    col1= schema(loadTable(dbName,tableName)).colDefs.name
    col2= schema(loadTable(dbName,tableName)).colDefs.typeString
    col1 = "`"+concat(col1,"`")
    col2 = "["+concat(col2,",")+"]"

    //
    partitionCol = schema(loadTable(dbName,tableName)).partitionColumnName
    partitionCol = "`"+concat(partitionCol,"`")
    //print the information for the creation of table
        print("db = database("+'\"'+database+'\")')
    print("db.createPartitionedTable(table(1:0,"+col1+","+col2+"),`"+tableName+","+partitionCol+")")

login(`admin,`123456)
getDDL("dfs://level2","quotes")