Waiting for 9.5 – TABLESAMPLE, SQL Standard and extensible

On 15th of May, Simon Riggs committed patch:

TABLESAMPLE, SQL Standard and extensible
 
Add a TABLESAMPLE clause to SELECT statements that allows
user to specify random BERNOULLI sampling or block level
SYSTEM sampling. Implementation allows for extensible
sampling functions to be written, using a standard API.
Basic version follows SQLStandard exactly. Usable
concrete use cases for the sampling API follow in later
commits.
 
Petr Jelinek
 
Reviewed by Michael Paquier and Simon Riggs

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