diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml index 9b0778baa99..396eaa5d550 100644 --- a/doc/src/sgml/func.sgml +++ b/doc/src/sgml/func.sgml @@ -12678,12 +12678,13 @@ NULL baz(3 rows) General-Purpose Aggregate Functions - + Function Argument Type(s) Return Type + Partial Mode Description @@ -12702,6 +12703,7 @@ NULL baz(3 rows) array of the argument type + Noinput values, including nulls, concatenated into an array @@ -12715,6 +12717,7 @@ NULL baz(3 rows) same as argument data type + Noinput arrays concatenated into array of one higher dimension (inputs must all have same dimensionality, and cannot be empty or NULL) @@ -12740,6 +12743,7 @@ NULL baz(3 rows)double precision for a floating-point argument, otherwise the same as the argument data type + All types apart from floating-point typesthe average (arithmetic mean) of all input values @@ -12757,6 +12761,7 @@ NULL baz(3 rows) same as argument data type + Yesthe bitwise AND of all non-null input values, or null if none @@ -12774,6 +12779,7 @@ NULL baz(3 rows) same as argument data type + Yesthe bitwise OR of all non-null input values, or null if none @@ -12790,6 +12796,7 @@ NULL baz(3 rows) bool + Yestrue if all input values are true, otherwise false @@ -12806,6 +12813,7 @@ NULL baz(3 rows) bool + Yestrue if at least one input value is true, otherwise false @@ -12818,6 +12826,7 @@ NULL baz(3 rows)bigint + Yesnumber of input rows @@ -12825,6 +12834,7 @@ NULL baz(3 rows)count(expression)anybigint + Yes number of input rows for which the value of expression is not null @@ -12844,6 +12854,7 @@ NULL baz(3 rows) bool + Yesequivalent to bool_and @@ -12860,6 +12871,7 @@ NULL baz(3 rows) json + Noaggregates values as a JSON array @@ -12876,6 +12888,7 @@ NULL baz(3 rows) jsonb + Noaggregates values as a JSON array @@ -12892,6 +12905,7 @@ NULL baz(3 rows) json + Noaggregates name/value pairs as a JSON object @@ -12908,6 +12922,7 @@ NULL baz(3 rows) jsonb + Noaggregates name/value pairs as a JSON object @@ -12921,6 +12936,7 @@ NULL baz(3 rows)any numeric, string, date/time, network, or enum type, or arrays of these typessame as argument type + Yes maximum value of expression across all input @@ -12938,6 +12954,7 @@ NULL baz(3 rows)any numeric, string, date/time, network, or enum type, or arrays of these typessame as argument type + Yes minimum value of expression across all input @@ -12961,6 +12978,7 @@ NULL baz(3 rows) same as argument types + Noinput values concatenated into a string, separated by delimiter @@ -12983,6 +13001,7 @@ NULL baz(3 rows)bigint arguments, otherwise the same as the argument data type + All types apart from floating-point typessum of expression across all input values @@ -12999,6 +13018,7 @@ NULL baz(3 rows) xml + Noconcatenation of XML values (see also ) @@ -13015,6 +13035,12 @@ NULL baz(3 rows) substitute zero or an empty array for null when necessary. + + Aggregate functions which support Partial Mode + are eligible to participate in various optimizations, such as parallel + aggregation. + + ANY @@ -13098,12 +13124,13 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab;
Aggregate Functions for Statistics - + Function Argument Type Return Type + Partial Mode Description @@ -13126,6 +13153,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision + Nocorrelation coefficient @@ -13146,6 +13174,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision + Nopopulation covariance @@ -13166,6 +13195,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision + Nosample covariance @@ -13182,6 +13212,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision + Noaverage of the independent variable (sum(X)/N) @@ -13199,6 +13230,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision + Noaverage of the dependent variable (sum(Y)/N) @@ -13216,6 +13248,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; bigint + Nonumber of input rows in which both expressions are nonnull @@ -13235,6 +13268,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision + Noy-intercept of the least-squares-fit linear equation determined by the (X, double precision + Nosquare of the correlation coefficient @@ -13273,6 +13308,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision + Noslope of the least-squares-fit linear equation determined by the (X, Y) pairs @@ -13291,6 +13327,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision + Nosum(X^2) - sum(X)^2/ double precision + Nosum(X*Y) - sum( double precision + Nosum(Y^2) - sum(Y)^2/double precision for floating-point arguments, otherwise numeric + All types apart from floating-point typeshistorical alias for stddev_samp @@ -13383,6 +13423,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision for floating-point arguments, otherwise numeric + All types apart from floating-point typespopulation standard deviation of the input values @@ -13406,6 +13447,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision for floating-point arguments, otherwise numeric + All types apart from floating-point typessample standard deviation of the input values @@ -13425,6 +13467,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision for floating-point arguments, otherwise numeric + All types apart from floating-point typeshistorical alias for var_samp @@ -13448,6 +13491,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision for floating-point arguments, otherwise numeric + All types apart from floating-point typespopulation variance of the input values (square of the population standard deviation) @@ -13471,6 +13515,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision for floating-point arguments, otherwise numeric + All types apart from floating-point typessample variance of the input values (square of the sample standard deviation) @@ -13495,13 +13540,14 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab;
Ordered-Set Aggregate Functions - + Function Direct Argument Type(s) Aggregated Argument Type(s) Return Type + Partial Mode Description @@ -13524,6 +13570,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; same as sort expression + No returns the most frequent input value (arbitrarily choosing the first one if there are multiple equally-frequent results) @@ -13550,6 +13597,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; same as sort expression + No continuous percentile: returns a value corresponding to the specified fraction in the ordering, interpolating between adjacent input items if @@ -13570,6 +13618,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; array of sort expression's type + No multiple continuous percentile: returns an array of results matching the shape of the fractions parameter, with each @@ -13594,6 +13643,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; same as sort expression + No discrete percentile: returns the first input value whose position in the ordering equals or exceeds the specified fraction @@ -13613,6 +13663,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; array of sort expression's type + No multiple discrete percentile: returns an array of results matching the shape of the fractions parameter, with each non-null @@ -13651,13 +13702,14 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab;
Hypothetical-Set Aggregate Functions - + Function Direct Argument Type(s) Aggregated Argument Type(s) Return Type + Partial Mode Description @@ -13681,6 +13733,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; bigint + No rank of the hypothetical row, with gaps for duplicate rows @@ -13703,6 +13756,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; bigint + No rank of the hypothetical row, without gaps @@ -13725,6 +13779,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision + No relative rank of the hypothetical row, ranging from 0 to 1 @@ -13747,6 +13802,7 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab; double precision + No relative rank of the hypothetical row, ranging from 1/N to 1