loadMvccTable
Syntax
loadMvccTable(path, tableName)
Arguments
path is a string indicating the absolute path of the table.
tableName is a string indicating the name of the table on disk.
Details
Load all data of an MVCC table on disk into memory.
Examples
$ n=5
$ syms=`IBM`C`MS`MSFT`JPM`ORCL`FB`GE
$ timestamp=09:30:00+rand(18000,n)
$ sym=rand(syms,n)
$ qty=100*(1+rand(100,n))
$ price=5.0+rand(100.0,n)
$ temp=table(timestamp,sym,qty,price)
$ t1= mvccTable(1:0,`timestamp`sym`qty`price,[TIMESTAMP,SYMBOL,INT,DOUBLE],"C:/DolphinDB/Data","t1")
$ t1.append!(temp);
$ loadMvccTable("C:/DolphinDB/Data",t1);
timestamp |
sym |
qty |
price |
|---|---|---|---|
1970.01.01T00:00:39.091 |
MSFT |
4500 |
99.808702 |
1970.01.01T00:00:35.293 |
FB |
3600 |
26.644715 |
1970.01.01T00:00:36.334 |
MSFT |
3800 |
66.754334 |
1970.01.01T00:00:40.362 |
ORCL |
4800 |
15.480288 |
1970.01.01T00:00:35.565 |
MSFT |
1700 |
23.107408 |