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Fixed #27849 -- Added filtering support to aggregates.

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Tom 2017-04-22 16:44:51 +01:00 • committed by Tim Graham
parent 489421b015
commit b78d100fa6
13 changed files with 290 additions and 55 deletions
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36
docs/ref/contrib/postgres/aggregates.txt
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@ -22,7 +22,7 @@ General-purpose aggregation functions
``ArrayAgg``
------------
.. class:: ArrayAgg(expression, distinct=False, **extra)
.. class:: ArrayAgg(expression, distinct=False, filter=None, **extra)
Returns a list of values, including nulls, concatenated into an array.
@ -36,7 +36,7 @@ General-purpose aggregation functions
``BitAnd``
----------
.. class:: BitAnd(expression, **extra)
.. class:: BitAnd(expression, filter=None, **extra)
Returns an ``int`` of the bitwise ``AND`` of all non-null input values, or
``None`` if all values are null.
@ -44,7 +44,7 @@ General-purpose aggregation functions
``BitOr``
---------
.. class:: BitOr(expression, **extra)
.. class:: BitOr(expression, filter=None, **extra)
Returns an ``int`` of the bitwise ``OR`` of all non-null input values, or
``None`` if all values are null.
@ -52,7 +52,7 @@ General-purpose aggregation functions
``BoolAnd``
-----------
.. class:: BoolAnd(expression, **extra)
.. class:: BoolAnd(expression, filter=None, **extra)
Returns ``True``, if all input values are true, ``None`` if all values are
null or if there are no values, otherwise ``False`` .
@ -60,7 +60,7 @@ General-purpose aggregation functions
``BoolOr``
----------
.. class:: BoolOr(expression, **extra)
.. class:: BoolOr(expression, filter=None, **extra)
Returns ``True`` if at least one input value is true, ``None`` if all
values are null or if there are no values, otherwise ``False``.
@ -68,7 +68,7 @@ General-purpose aggregation functions
``JSONBAgg``
------------
.. class:: JSONBAgg(expressions, **extra)
.. class:: JSONBAgg(expressions, filter=None, **extra)
.. versionadded:: 1.11
@ -77,7 +77,7 @@ General-purpose aggregation functions
``StringAgg``
-------------
.. class:: StringAgg(expression, delimiter, distinct=False)
.. class:: StringAgg(expression, delimiter, distinct=False, filter=None)
Returns the input values concatenated into a string, separated by
the ``delimiter`` string.
@ -105,7 +105,7 @@ field or an expression returning a numeric data. Both are required.
``Corr``
--------
.. class:: Corr(y, x)
.. class:: Corr(y, x, filter=None)
Returns the correlation coefficient as a ``float``, or ``None`` if there
aren't any matching rows.
@ -113,7 +113,7 @@ field or an expression returning a numeric data. Both are required.
``CovarPop``
------------
.. class:: CovarPop(y, x, sample=False)
.. class:: CovarPop(y, x, sample=False, filter=None)
Returns the population covariance as a ``float``, or ``None`` if there
aren't any matching rows.
@ -129,7 +129,7 @@ field or an expression returning a numeric data. Both are required.
``RegrAvgX``
------------
.. class:: RegrAvgX(y, x)
.. class:: RegrAvgX(y, x, filter=None)
Returns the average of the independent variable (``sum(x)/N``) as a
``float``, or ``None`` if there aren't any matching rows.
@ -137,7 +137,7 @@ field or an expression returning a numeric data. Both are required.
``RegrAvgY``
------------
.. class:: RegrAvgY(y, x)
.. class:: RegrAvgY(y, x, filter=None)
Returns the average of the dependent variable (``sum(y)/N``) as a
``float``, or ``None`` if there aren't any matching rows.
@ -145,7 +145,7 @@ field or an expression returning a numeric data. Both are required.
``RegrCount``
-------------
.. class:: RegrCount(y, x)
.. class:: RegrCount(y, x, filter=None)
Returns an ``int`` of the number of input rows in which both expressions
are not null.
@ -153,7 +153,7 @@ field or an expression returning a numeric data. Both are required.
``RegrIntercept``
-----------------
.. class:: RegrIntercept(y, x)
.. class:: RegrIntercept(y, x, filter=None)
Returns the y-intercept of the least-squares-fit linear equation determined
by the ``(x, y)`` pairs as a ``float``, or ``None`` if there aren't any
@ -162,7 +162,7 @@ field or an expression returning a numeric data. Both are required.
``RegrR2``
----------
.. class:: RegrR2(y, x)
.. class:: RegrR2(y, x, filter=None)
Returns the square of the correlation coefficient as a ``float``, or
``None`` if there aren't any matching rows.
@ -170,7 +170,7 @@ field or an expression returning a numeric data. Both are required.
``RegrSlope``
-------------
.. class:: RegrSlope(y, x)
.. class:: RegrSlope(y, x, filter=None)
Returns the slope of the least-squares-fit linear equation determined
by the ``(x, y)`` pairs as a ``float``, or ``None`` if there aren't any
@ -179,7 +179,7 @@ field or an expression returning a numeric data. Both are required.
``RegrSXX``
-----------
.. class:: RegrSXX(y, x)
.. class:: RegrSXX(y, x, filter=None)
Returns ``sum(x^2) - sum(x)^2/N`` ("sum of squares" of the independent
variable) as a ``float``, or ``None`` if there aren't any matching rows.
@ -187,7 +187,7 @@ field or an expression returning a numeric data. Both are required.
``RegrSXY``
-----------
.. class:: RegrSXY(y, x)
.. class:: RegrSXY(y, x, filter=None)
Returns ``sum(x*y) - sum(x) * sum(y)/N`` ("sum of products" of independent
times dependent variable) as a ``float``, or ``None`` if there aren't any
@ -196,7 +196,7 @@ field or an expression returning a numeric data. Both are required.
``RegrSYY``
-----------
.. class:: RegrSYY(y, x)
.. class:: RegrSYY(y, x, filter=None)
Returns ``sum(y^2) - sum(y)^2/N`` ("sum of squares" of the dependent
variable) as a ``float``, or ``None`` if there aren't any matching rows.