GetCompression function

The GetCompression function returns the compression string if the time series data is compressed.

Syntax

GetCompression(ts     TimeSeries)
returns string;
ts
The name of the time series.

Description

Use the GetCompression function to determine the type of compression that is used in a time series that contains compressed numeric data.

Returns

Returns a string that represents the compression type if the time series contains compressed data; returns NULL if the time series does not contain compressed data.

Example

The following statement indicates that the time series that is named compress_test uses the compression type Quantization:

SELECT GetCompression(compress_test) FROM tstable;

(expression)   n(),q(1,1,100),ls(0.10), lb(0.10),qls(2,0.15,100,100000), 
               qlb(2,0.25,100,100000)

1 row(s) retrieved.