dropDatabase

Syntax

dropDatabase(directory)

Arguments

directory the directory where the database is located. For a database in the distributed file system, the directory should start with “dfs://”.

Details

Delete all physical files from the specified database.

Examples

Drop a DFS database:

$ n=1000000
$ ID=rand(10, n)
$ dates=2017.08.07..2017.08.11
$ date=rand(dates, n)
$ x=rand(10.0, n)
$ t=table(ID, date, x);
$ saveText(t, "C:/DolphinDB/Data/t.txt");

$ db = database("dfs://valueDB", VALUE, 2017.08.07..2017.08.11)
$ pt = loadTextEx(db, `pt1, `date, "C:/DolphinDB/Data/t.txt");

$ dropDatabase("dfs://valueDB")

Drop a database on disk:

$ n=1000000
$ ID=rand(10, n)
$ dates=2017.08.07..2017.08.11
$ date=rand(dates, n)
$ x=rand(10.0, n)
$ t=table(ID, date, x)
$ saveText(t, "C:/DolphinDB/Data/t.txt");

$ db = database("C:/DolphinDB/Data/rangedb", RANGE, 0 5 10)
$ pt = loadTextEx(db, `pt, `ID, "C:/DolphinDB/Data/t.txt");

$ dropDatabase("C:/DolphinDB/Data/rangedb");