SQL: MATCH and QUERY documentation; one list of functions (#40494)
* Document MATCH and QUERY function predicates. * Polish the functions pages and add a list of functions to the main Functions & Operators page. (cherry picked from commit 4cec0ae1b962ec7ea011a290aec72740386eb808)
This commit is contained in:
Andrei Stefan
Andrei Stefan
parent
760cfffe4b
commit
99dca30197
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@ -124,7 +124,8 @@ Query timeout (in seconds). That is the maximum amount of time waiting for a que
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[float]
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==== Mapping
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`field.multi.value.leniency` (default `true`):: Whether to be lenient and return the first value for fields with multiple values (true) or throw an exception.
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`field.multi.value.leniency` (default `true`):: Whether to be lenient and return the first value (without any guarantees of what that
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will be - typically the first in natural ascending order) for fields with multiple values (true) or throw an exception.
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[float]
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==== Additional
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@ -6,10 +6,12 @@
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Functions for computing a _single_ result from a set of input values.
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{es-sql} supports aggregate functions only alongside <<sql-syntax-group-by,grouping>> (implicit or explicit).
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==== General Purpose
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[[sql-functions-aggs-general]]
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[float]
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=== General Purpose
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[[sql-functions-aggs-avg]]
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===== `AVG`
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==== `AVG`
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.Synopsis:
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[source, sql]
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@ -33,7 +35,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggAvg]
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--------------------------------------------------
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[[sql-functions-aggs-count]]
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===== `COUNT`
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==== `COUNT`
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.Synopsis:
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[source, sql]
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@ -63,7 +65,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggCountStar]
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[[sql-functions-aggs-count-all]]
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===== `COUNT(ALL)`
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==== `COUNT(ALL)`
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.Synopsis:
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[source, sql]
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@ -88,7 +90,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggCountAll]
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[[sql-functions-aggs-count-distinct]]
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===== `COUNT(DISTINCT)`
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==== `COUNT(DISTINCT)`
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.Synopsis:
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[source, sql]
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@ -112,7 +114,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggCountDistinct]
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--------------------------------------------------
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[[sql-functions-aggs-first]]
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===== `FIRST/FIRST_VALUE`
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==== `FIRST/FIRST_VALUE`
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.Synopsis:
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[source, sql]
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@ -207,7 +209,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[firstValueWithTwoArgsAndGroupBy]
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the field is also <<before-enabling-fielddata,saved as a keyword>>.
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[[sql-functions-aggs-last]]
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===== `LAST/LAST_VALUE`
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==== `LAST/LAST_VALUE`
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.Synopsis:
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[source, sql]
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@ -302,7 +304,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[lastValueWithTwoArgsAndGroupBy]
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the field is also <<before-enabling-fielddata,`saved as a keyword`>>.
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[[sql-functions-aggs-max]]
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===== `MAX`
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==== `MAX`
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.Synopsis:
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[source, sql]
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@ -330,7 +332,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggMax]
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<<sql-functions-aggs-last>> and therefore, it cannot be used in `HAVING` clause.
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[[sql-functions-aggs-min]]
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===== `MIN`
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==== `MIN`
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.Synopsis:
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[source, sql]
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@ -358,7 +360,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggMin]
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<<sql-functions-aggs-first>> and therefore, it cannot be used in `HAVING` clause.
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[[sql-functions-aggs-sum]]
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===== `SUM`
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==== `SUM`
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.Synopsis:
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[source, sql]
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@ -381,10 +383,12 @@ Returns the sum of input values in the field `field_name`.
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include-tagged::{sql-specs}/docs/docs.csv-spec[aggSum]
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--------------------------------------------------
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==== Statistics
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[[sql-functions-aggs-statistics]]
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[float]
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=== Statistics
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[[sql-functions-aggs-kurtosis]]
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===== `KURTOSIS`
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==== `KURTOSIS`
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.Synopsis:
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[source, sql]
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@ -408,7 +412,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggKurtosis]
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--------------------------------------------------
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[[sql-functions-aggs-mad]]
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===== `MAD`
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==== `MAD`
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.Synopsis:
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[source, sql]
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@ -432,7 +436,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggMad]
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--------------------------------------------------
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[[sql-functions-aggs-percentile]]
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===== `PERCENTILE`
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==== `PERCENTILE`
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.Synopsis:
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[source, sql]
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@ -458,7 +462,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggPercentile]
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--------------------------------------------------
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[[sql-functions-aggs-percentile-rank]]
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===== `PERCENTILE_RANK`
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==== `PERCENTILE_RANK`
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.Synopsis:
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[source, sql]
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@ -484,7 +488,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggPercentileRank]
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--------------------------------------------------
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[[sql-functions-aggs-skewness]]
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===== `SKEWNESS`
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==== `SKEWNESS`
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.Synopsis:
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[source, sql]
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@ -508,7 +512,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggSkewness]
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--------------------------------------------------
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[[sql-functions-aggs-stddev-pop]]
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===== `STDDEV_POP`
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==== `STDDEV_POP`
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.Synopsis:
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[source, sql]
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@ -532,7 +536,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggStddevPop]
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--------------------------------------------------
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[[sql-functions-aggs-sum-squares]]
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===== `SUM_OF_SQUARES`
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==== `SUM_OF_SQUARES`
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.Synopsis:
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[source, sql]
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@ -556,7 +560,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[aggSumOfSquares]
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--------------------------------------------------
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[[sql-functions-aggs-var-pop]]
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===== `VAR_POP`
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==== `VAR_POP`
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.Synopsis:
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[source, sql]
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@ -45,6 +45,46 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[coalesceReturnNonNull]
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include-tagged::{sql-specs}/docs/docs.csv-spec[coalesceReturnNull]
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----
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[[sql-functions-conditional-greatest]]
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==== `GREATEST`
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.Synopsis:
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[source, sql]
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----
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GREATEST(expression<1>, expression<2>, ...)
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----
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*Input*:
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<1> 1st expression
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<2> 2nd expression
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...
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**N**th expression
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GREATEST can take an arbitrary number of arguments and
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all of them must be of the same data type.
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*Output*: one of the expressions or `null`
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.Description
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Returns the argument that has the largest value which is not null.
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If all arguments are null, then it returns `null`.
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[greatestReturnNonNull]
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----
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[greatestReturnNull]
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----
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[[sql-functions-conditional-ifnull]]
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==== `IFNULL`
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@ -120,120 +160,6 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[isNullReturnSecond]
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----
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[[sql-functions-conditional-nvl]]
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==== `NVL`
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.Synopsis:
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[source, sql]
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----
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NVL(expression<1>, expression<2>)
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----
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*Input*:
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<1> 1st expression
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<2> 2nd expression
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*Output*: 2nd expression if 1st expression is null, otherwise 1st expression.
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.Description
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Variant of <<sql-functions-conditional-coalesce>> with only two arguments.
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Returns the first of its arguments that is not null.
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If all arguments are null, then it returns `null`.
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[nvlReturnFirst]
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----
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[nvlReturnSecond]
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----
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[[sql-functions-conditional-nullif]]
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==== `NULLIF`
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.Synopsis:
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[source, sql]
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----
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NULLIF(expression<1>, expression<2>)
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----
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*Input*:
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<1> 1st expression
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<2> 2nd expression
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*Output*: `null` if the 2 expressions are equal, otherwise the 1st expression.
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.Description
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Returns `null` when the two input expressions are equal and
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if not, it returns the 1st expression.
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[nullIfReturnFirst]
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----
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[nullIfReturnNull]
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----
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[[sql-functions-conditional-greatest]]
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==== `GREATEST`
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.Synopsis:
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[source, sql]
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----
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GREATEST(expression<1>, expression<2>, ...)
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----
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*Input*:
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<1> 1st expression
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<2> 2nd expression
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...
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**N**th expression
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GREATEST can take an arbitrary number of arguments and
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all of them must be of the same data type.
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*Output*: one of the expressions or `null`
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.Description
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Returns the argument that has the largest value which is not null.
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If all arguments are null, then it returns `null`.
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[greatestReturnNonNull]
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----
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[greatestReturnNull]
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----
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[[sql-functions-conditional-least]]
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==== `LEAST`
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@ -274,3 +200,77 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[leastReturnNonNull]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[leastReturnNull]
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----
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[[sql-functions-conditional-nullif]]
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==== `NULLIF`
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.Synopsis:
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[source, sql]
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----
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NULLIF(expression<1>, expression<2>)
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----
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*Input*:
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<1> 1st expression
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<2> 2nd expression
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*Output*: `null` if the 2 expressions are equal, otherwise the 1st expression.
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.Description
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Returns `null` when the two input expressions are equal and
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if not, it returns the 1st expression.
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[nullIfReturnFirst]
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----
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[nullIfReturnNull]
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----
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[[sql-functions-conditional-nvl]]
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==== `NVL`
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.Synopsis:
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[source, sql]
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----
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NVL(expression<1>, expression<2>)
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----
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*Input*:
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<1> 1st expression
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<2> 2nd expression
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*Output*: 2nd expression if 1st expression is null, otherwise 1st expression.
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.Description
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Variant of <<sql-functions-conditional-coalesce>> with only two arguments.
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Returns the first of its arguments that is not null.
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If all arguments are null, then it returns `null`.
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[nvlReturnFirst]
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----
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs/docs.csv-spec[nvlReturnSecond]
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----
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@ -7,14 +7,115 @@
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* <<sql-operators, Operators>>
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* <<sql-functions-aggs, Aggregate>>
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** <<sql-functions-aggs-avg, AVG>>
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** <<sql-functions-aggs-count, COUNT>>
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** <<sql-functions-aggs-count-all, COUNT(ALL)>>
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** <<sql-functions-aggs-count-distinct, COUNT(DISTINCT)>>
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** <<sql-functions-aggs-first, FIRST>>
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** <<sql-functions-aggs-last, LAST>>
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** <<sql-functions-aggs-max, MAX>>
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** <<sql-functions-aggs-min, MIN>>
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** <<sql-functions-aggs-sum, SUM>>
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** <<sql-functions-aggs-kurtosis, KURTOSIS>>
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** <<sql-functions-aggs-mad, MAD>>
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** <<sql-functions-aggs-percentile, PERCENTILE>>
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** <<sql-functions-aggs-percentile-rank, PERCENTILE_RANK>>
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** <<sql-functions-aggs-skewness, SKEWNESS>>
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** <<sql-functions-aggs-stddev-pop, STDDEV_POP>>
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** <<sql-functions-aggs-sum-squares, SUM_OF_SQUARES>>
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** <<sql-functions-aggs-var-pop, VAR_POP>>
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* <<sql-functions-grouping, Grouping>>
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** <<sql-functions-grouping-histogram, HISTOGRAM>>
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* <<sql-functions-datetime, Date-Time>>
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** <<sql-functions-datetime-interval, INTERVAL>>
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** <<sql-functions-current-date, CURRENT_DATE>>
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** <<sql-functions-current-timestamp, CURRENT_TIMESTAMP>>
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** <<sql-functions-datetime-day, DAY>>
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** <<sql-functions-datetime-dow, DAY_OF_WEEK>>
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** <<sql-functions-datetime-doy, DAY_OF_YEAR>>
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** <<sql-functions-datetime-dayname, DAY_NAME>>
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** <<sql-functions-datetime-hour, HOUR>>
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** <<sql-functions-datetime-isodow, ISO_DAY_OF_WEEK>>
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** <<sql-functions-datetime-isoweek, ISO_WEEK_OF_YEAR>>
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** <<sql-functions-datetime-minuteofday, MINUTE_OF_DAY>>
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** <<sql-functions-datetime-minute, MINUTE_OF_HOUR>>
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** <<sql-functions-datetime-month, MONTH_OF_YEAR>>
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** <<sql-functions-datetime-monthname, MONTH_NAME>>
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** <<sql-functions-now, NOW>>
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** <<sql-functions-datetime-second, SECOND_OF_MINUTE>>
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** <<sql-functions-datetime-quarter, QUARTER>>
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** <<sql-functions-today, TODAY>>
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** <<sql-functions-datetime-week, WEEK_OF_YEAR>>
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** <<sql-functions-datetime-year, YEAR>>
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** <<sql-functions-datetime-extract, EXTRACT>>
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* <<sql-functions-search, Full-Text Search>>
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** <<sql-functions-search-match, MATCH>>
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** <<sql-functions-search-query, QUERY>>
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** <<sql-functions-search-score, SCORE>>
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* <<sql-functions-math, Mathematical>>
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** <<sql-functions-math-abs, ABS>>
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** <<sql-functions-math-cbrt, CBRT>>
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** <<sql-functions-math-ceil, CEIL>>
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** <<sql-functions-math-e, E>>
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** <<sql-functions-math-exp, EXP>>
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** <<sql-functions-math-expm1, EXPM1>>
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** <<sql-functions-math-floor, FLOOR>>
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** <<sql-functions-math-log, LOG>>
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** <<sql-functions-math-log10, LOG10>>
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** <<sql-functions-math-pi, PI>>
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** <<sql-functions-math-power, POWER>>
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** <<sql-functions-math-random, RANDOM>>
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** <<sql-functions-math-round, ROUND>>
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** <<sql-functions-math-sign, SIGN>>
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** <<sql-functions-math-sqrt, SQRT>>
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** <<sql-functions-math-truncate, TRUNCATE>>
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** <<sql-functions-math-acos, ACOS>>
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||||
** <<sql-functions-math-asin, ASIN>>
|
||||
** <<sql-functions-math-atan, ATAN>>
|
||||
** <<sql-functions-math-atan2, ATAN2>>
|
||||
** <<sql-functions-math-cos, COS>>
|
||||
** <<sql-functions-math-cosh, COSH>>
|
||||
** <<sql-functions-math-cot, COT>>
|
||||
** <<sql-functions-math-degrees, DEGREES>>
|
||||
** <<sql-functions-math-radians, RADIANS>>
|
||||
** <<sql-functions-math-sin, SIN>>
|
||||
** <<sql-functions-math-sinh, SINH>>
|
||||
** <<sql-functions-math-tan, TAN>>
|
||||
* <<sql-functions-string, String>>
|
||||
** <<sql-functions-string-ascii, ASCII>>
|
||||
** <<sql-functions-string-bit-length, BIT_LENGTH>>
|
||||
** <<sql-functions-string-char, CHAR>>
|
||||
** <<sql-functions-string-char-length, CHAR_LENGTH>>
|
||||
** <<sql-functions-string-concat, CONCAT>>
|
||||
** <<sql-functions-string-insert, INSERT>>
|
||||
** <<sql-functions-string-lcase, LCASE>>
|
||||
** <<sql-functions-string-left, LEFT>>
|
||||
** <<sql-functions-string-length, LENGTH>>
|
||||
** <<sql-functions-string-locate, LOCATE>>
|
||||
** <<sql-functions-string-ltrim, LTRIM>>
|
||||
** <<sql-functions-string-octet-length, OCTET_LENGTH>>
|
||||
** <<sql-functions-string-position, POSITION>>
|
||||
** <<sql-functions-string-repeat, REPEAT>>
|
||||
** <<sql-functions-string-replace, REPLACE>>
|
||||
** <<sql-functions-string-right, RIGHT>>
|
||||
** <<sql-functions-string-rtrim, RTRIM>>
|
||||
** <<sql-functions-string-space, SPACE>>
|
||||
** <<sql-functions-string-substring, SUBSTRING>>
|
||||
** <<sql-functions-string-ucase, UCASE>>
|
||||
* <<sql-functions-type-conversion, Type Conversion>>
|
||||
** <<sql-functions-type-conversion-cast, CAST>>
|
||||
** <<sql-functions-type-conversion-convert, CONVERT>>
|
||||
* <<sql-functions-conditional, Conditional>>
|
||||
** <<sql-functions-conditional-coalesce, COALESCE>>
|
||||
** <<sql-functions-conditional-greatest, GREATEST>>
|
||||
** <<sql-functions-conditional-ifnull, IFNULL>>
|
||||
** <<sql-functions-conditional-isnull, ISNULL>>
|
||||
** <<sql-functions-conditional-least, LEAST>>
|
||||
** <<sql-functions-conditional-nullif, NULLIF>>
|
||||
** <<sql-functions-conditional-nvl, NVL>>
|
||||
* <<sql-functions-system, System>>
|
||||
** <<sql-functions-system-database, DATABASE>>
|
||||
** <<sql-functions-system-user, USER>>
|
||||
|
||||
include::operators.asciidoc[]
|
||||
include::aggs.asciidoc[]
|
||||
|
|
|
|||
|
|
@ -6,10 +6,12 @@
|
|||
All math and trigonometric functions require their input (where applicable)
|
||||
to be numeric.
|
||||
|
||||
==== Generic
|
||||
[[sql-functions-math-generic]]
|
||||
[float]
|
||||
=== Generic
|
||||
|
||||
[[sql-functions-math-abs]]
|
||||
===== `ABS`
|
||||
==== `ABS`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -33,7 +35,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[abs]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-cbrt]]
|
||||
===== `CBRT`
|
||||
==== `CBRT`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -57,7 +59,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineCbrtWithNegativeValue]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-ceil]]
|
||||
===== `CEIL/CEILING`
|
||||
==== `CEIL/CEILING`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -81,7 +83,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineCeiling]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-e]]
|
||||
===== `E`
|
||||
==== `E`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -103,7 +105,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathEulersNumber]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-exp]]
|
||||
===== `EXP`
|
||||
==== `EXP`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -127,7 +129,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathExpInline]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-expm1]]
|
||||
===== `EXPM1`
|
||||
==== `EXPM1`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -151,7 +153,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathExpm1Inline]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-floor]]
|
||||
===== `FLOOR`
|
||||
==== `FLOOR`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -175,7 +177,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineFloor]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-log]]
|
||||
===== `LOG`
|
||||
==== `LOG`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -199,7 +201,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineLog]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-log10]]
|
||||
===== `LOG10`
|
||||
==== `LOG10`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -223,7 +225,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineLog10]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-pi]]
|
||||
===== `PI`
|
||||
==== `PI`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -245,7 +247,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathPINumber]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-power]]
|
||||
===== `POWER`
|
||||
==== `POWER`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -275,7 +277,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlinePowerNegative]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-random]]
|
||||
===== `RANDOM/RAND`
|
||||
==== `RANDOM/RAND`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -299,7 +301,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathRandom]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-round]]
|
||||
===== `ROUND`
|
||||
==== `ROUND`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -330,7 +332,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathRoundWithNegativeParameter]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-sign]]
|
||||
===== `SIGN/SIGNUM`
|
||||
==== `SIGN/SIGNUM`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -355,7 +357,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineSign]
|
|||
|
||||
|
||||
[[sql-functions-math-sqrt]]
|
||||
===== `SQRT`
|
||||
==== `SQRT`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -379,7 +381,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineSqrt]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-truncate]]
|
||||
===== `TRUNCATE`
|
||||
==== `TRUNCATE`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -409,10 +411,12 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathTruncateWithPositiveParameter
|
|||
include-tagged::{sql-specs}/docs/docs.csv-spec[mathTruncateWithNegativeParameter]
|
||||
--------------------------------------------------
|
||||
|
||||
==== Trigonometric
|
||||
[[sql-functions-math-trigonometric]]
|
||||
[float]
|
||||
=== Trigonometric
|
||||
|
||||
[[sql-functions-math-acos]]
|
||||
===== `ACOS`
|
||||
==== `ACOS`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -436,7 +440,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineAcos]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-asin]]
|
||||
===== `ASIN`
|
||||
==== `ASIN`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -460,7 +464,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineAsin]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-atan]]
|
||||
===== `ATAN`
|
||||
==== `ATAN`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -484,7 +488,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineAtan]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-atan2]]
|
||||
===== `ATAN2`
|
||||
==== `ATAN2`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -509,7 +513,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineAtan2]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-cos]]
|
||||
===== `COS`
|
||||
==== `COS`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -533,7 +537,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineCosine]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-cosh]]
|
||||
===== `COSH`
|
||||
==== `COSH`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -557,7 +561,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineCosh]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-cot]]
|
||||
===== `COT`
|
||||
==== `COT`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -581,7 +585,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineCotangent]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-degrees]]
|
||||
===== `DEGREES`
|
||||
==== `DEGREES`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -606,7 +610,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineDegrees]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-radians]]
|
||||
===== `RADIANS`
|
||||
==== `RADIANS`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -631,7 +635,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineRadians]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-sin]]
|
||||
===== `SIN`
|
||||
==== `SIN`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -655,7 +659,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineSine]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-sinh]]
|
||||
===== `SINH`
|
||||
==== `SINH`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
@ -679,7 +683,7 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[mathInlineSinh]
|
|||
--------------------------------------------------
|
||||
|
||||
[[sql-functions-math-tan]]
|
||||
===== `TAN`
|
||||
==== `TAN`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
|
|
|
|||
|
|
@ -8,6 +8,118 @@ when the `MATCH` or `QUERY` predicates are being used.
|
|||
Outside a, so-called, search context, these functions will return default values
|
||||
such as `0` or `NULL`.
|
||||
|
||||
[[sql-functions-search-match]]
|
||||
==== `MATCH`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
--------------------------------------------------
|
||||
MATCH(field_exp<1>, constant_exp<2>[, options]<3>)
|
||||
--------------------------------------------------
|
||||
|
||||
*Input*:
|
||||
|
||||
<1> field(s) to match
|
||||
<2> matching text
|
||||
<3> additional parameters; optional
|
||||
|
||||
.Description:
|
||||
|
||||
A full-text search option, in the form of a predicate, available in {es-sql} that gives the user control over powerful <<query-dsl-match-query,match>>
|
||||
and <<query-dsl-multi-match-query,multi_match>> {es} queries.
|
||||
|
||||
The first parameter is the field or fields to match against. In case it receives one value only, {es-sql} will use a `match` query to perform the search:
|
||||
|
||||
["source","sql",subs="attributes,callouts,macros"]
|
||||
----
|
||||
include-tagged::{sql-specs}/docs/docs.csv-spec[simpleMatch]
|
||||
----
|
||||
|
||||
However, it can also receive a list of fields and their corresponding optional `boost` value. In this case, {es-sql} will use a
|
||||
`multi_match` query to match the documents:
|
||||
|
||||
["source","sql",subs="attributes,callouts,macros"]
|
||||
----
|
||||
include-tagged::{sql-specs}/docs/docs.csv-spec[multiFieldsMatch]
|
||||
----
|
||||
|
||||
NOTE: The `multi_match` query in {es} has the option of <<query-dsl-multi-match-query,per-field boosting>> that gives preferential weight
|
||||
(in terms of scoring) to fields being searched in, using the `^` character. In the example above, the `name` field has a greater weight in
|
||||
the final score than the `author` field when searching for `frank dune` text in both of them.
|
||||
|
||||
Both options above can be used in combination with the optional third parameter of the `MATCH()` predicate, where one can specify
|
||||
additional configuration parameters (separated by semicolon `;`) for either `match` or `multi_match` queries. For example:
|
||||
|
||||
["source","sql",subs="attributes,callouts,macros"]
|
||||
----
|
||||
include-tagged::{sql-specs}/docs/docs.csv-spec[optionalParamsForMatch]
|
||||
----
|
||||
|
||||
In the more advanced example above, the `cutoff_frequency` parameter allows specifying an absolute or relative document frequency where
|
||||
high frequency terms are moved into an optional subquery and are only scored if one of the low frequency (below the cutoff) terms in the
|
||||
case of an `or` operator or all of the low frequency terms in the case of an `and` operator match. More about this you can find in the
|
||||
<<query-dsl-match-query-cutoff>> page.
|
||||
|
||||
NOTE: The allowed optional parameters for a single-field `MATCH()` variant (for the `match` {es} query) are: `analyzer`, `auto_generate_synonyms_phrase_query`,
|
||||
`cutoff_frequency`, `lenient`, `fuzzy_transpositions`, `fuzzy_rewrite`, `minimum_should_match`, `operator`,
|
||||
`max_expansions`, `prefix_length`.
|
||||
|
||||
NOTE: The allowed optional parameters for a multi-field `MATCH()` variant (for the `multi_match` {es} query) are: `analyzer`, `auto_generate_synonyms_phrase_query`,
|
||||
`cutoff_frequency`, `lenient`, `fuzzy_transpositions`, `fuzzy_rewrite`, `minimum_should_match`, `operator`,
|
||||
`max_expansions`, `prefix_length`, `slop`, `tie_breaker`, `type`.
|
||||
|
||||
|
||||
[[sql-functions-search-query]]
|
||||
==== `QUERY`
|
||||
|
||||
.Synopsis:
|
||||
[source, sql]
|
||||
--------------------------------------------------
|
||||
QUERY(constant_exp<1>[, options]<2>)
|
||||
--------------------------------------------------
|
||||
|
||||
*Input*:
|
||||
|
||||
<1> query text
|
||||
<2> additional parameters; optional
|
||||
|
||||
.Description:
|
||||
|
||||
Just like `MATCH`, `QUERY` is a full-text search predicate that gives the user control over the <<query-dsl-query-string-query,query_string>> query in {es}.
|
||||
|
||||
The first parameter is basically the input that will be passed as is to the `query_string` query, which means that anything that `query_string`
|
||||
accepts in its `query` field can be used here as well:
|
||||
|
||||
["source","sql",subs="attributes,callouts,macros"]
|
||||
----
|
||||
include-tagged::{sql-specs}/docs/docs.csv-spec[simpleQueryQuery]
|
||||
----
|
||||
|
||||
A more advanced example, showing more of the features that `query_string` supports, of course possible with {es-sql}:
|
||||
|
||||
["source","sql",subs="attributes,callouts,macros"]
|
||||
----
|
||||
include-tagged::{sql-specs}/docs/docs.csv-spec[advancedQueryQuery]
|
||||
----
|
||||
|
||||
The query above uses the `_exists_` query to select documents that have values in the `author` field, a range query for `page_count` and
|
||||
regex and fuzziness queries for the `name` field.
|
||||
|
||||
If one needs to customize various configuration options that `query_string` exposes, this can be done using the second _optional_ parameter.
|
||||
Multiple settings can be specified separated by a semicolon `;`:
|
||||
|
||||
["source","sql",subs="attributes,callouts,macros"]
|
||||
----
|
||||
include-tagged::{sql-specs}/docs/docs.csv-spec[optionalParameterQuery]
|
||||
----
|
||||
|
||||
NOTE: The allowed optional parameters for `QUERY()` are: `allow_leading_wildcard`, `analyze_wildcard`, `analyzer`,
|
||||
`auto_generate_synonyms_phrase_query`, `default_field`, `default_operator`, `enable_position_increments`,
|
||||
`escape`, `fuzzy_max_expansions`, `fuzzy_prefix_length`, `fuzzy_rewrite`, `fuzzy_transpositions`, `lenient`,
|
||||
`locale`, `lowercase_expanded_terms`, `max_determinized_states`, `minimum_should_match`, `phrase_slop`, `rewrite`,
|
||||
`quote_analyzer`, `quote_field_suffix`, `tie_breaker`, `time_zone`, `type`.
|
||||
|
||||
|
||||
[[sql-functions-search-score]]
|
||||
==== `SCORE`
|
||||
|
||||
|
|
|
|||
|
|
@ -71,7 +71,6 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[wildcardWithOrder]
|
|||
which essentially returns all(top-level fields, sub-fields, such as multi-fields are ignored] columns found.
|
||||
|
||||
[[sql-syntax-from]]
|
||||
[float]
|
||||
==== FROM Clause
|
||||
|
||||
The `FROM` clause specifies one table for the `SELECT` and has the following syntax:
|
||||
|
|
@ -111,7 +110,6 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[fromTableAlias]
|
|||
----
|
||||
|
||||
[[sql-syntax-where]]
|
||||
[float]
|
||||
==== WHERE Clause
|
||||
|
||||
The optional `WHERE` clause is used to filter rows from the query and has the following syntax:
|
||||
|
|
@ -133,7 +131,6 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[basicWhere]
|
|||
----
|
||||
|
||||
[[sql-syntax-group-by]]
|
||||
[float]
|
||||
==== GROUP BY
|
||||
|
||||
The `GROUP BY` clause is used to divide the results into groups of rows on matching values from the designated columns. It has the following syntax:
|
||||
|
|
@ -208,7 +205,6 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[groupByAndMultipleAggs]
|
|||
----
|
||||
|
||||
[[sql-syntax-group-by-implicit]]
|
||||
[float]
|
||||
===== Implicit Grouping
|
||||
|
||||
When an aggregation is used without an associated `GROUP BY`, an __implicit grouping__ is applied, meaning all selected rows are considered to form a single default, or implicit group.
|
||||
|
|
@ -229,7 +225,6 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[groupByImplicitMultipleAggs]
|
|||
----
|
||||
|
||||
[[sql-syntax-having]]
|
||||
[float]
|
||||
==== HAVING
|
||||
|
||||
The `HAVING` clause can be used _only_ along aggregate functions (and thus `GROUP BY`) to filter what groups are kept or not and has the following syntax:
|
||||
|
|
@ -263,7 +258,6 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[groupByHavingMultiple]
|
|||
----
|
||||
|
||||
[[sql-syntax-having-group-by-implicit]]
|
||||
[float]
|
||||
===== Implicit Grouping
|
||||
|
||||
As indicated above, it is possible to have a `HAVING` clause without a `GROUP BY`. In this case, the so-called <<sql-syntax-group-by-implicit, __implicit grouping__>> is applied, meaning all selected rows are considered to form a single group and `HAVING` can be applied on any of the aggregate functions specified on this group.
|
||||
|
|
@ -285,7 +279,6 @@ include-tagged::{sql-specs}/docs/docs.csv-spec[groupByHavingImplicitMatch]
|
|||
|
||||
|
||||
[[sql-syntax-order-by]]
|
||||
[float]
|
||||
==== ORDER BY
|
||||
|
||||
The `ORDER BY` clause is used to sort the results of `SELECT` by one or more expressions:
|
||||
|
|
@ -373,7 +366,6 @@ Trying to return `score` from a non full-text query will return the same value f
|
|||
all are equally relevant.
|
||||
|
||||
[[sql-syntax-limit]]
|
||||
[float]
|
||||
==== LIMIT
|
||||
|
||||
The `LIMIT` clause restricts (limits) the number of rows returns using the format:
|
||||
|
|
|
|||
|
|
@ -929,6 +929,84 @@ null |25324
|
|||
// end::orderByAgg
|
||||
;
|
||||
|
||||
simpleMatch
|
||||
// tag::simpleMatch
|
||||
SELECT author, name FROM library WHERE MATCH(author, 'frank');
|
||||
|
||||
author | name
|
||||
---------------+-------------------
|
||||
Frank Herbert |Dune
|
||||
Frank Herbert |Dune Messiah
|
||||
Frank Herbert |Children of Dune
|
||||
Frank Herbert |God Emperor of Dune
|
||||
|
||||
// end::simpleMatch
|
||||
;
|
||||
|
||||
multiFieldsMatch
|
||||
// tag::multiFieldsMatch
|
||||
SELECT author, name, SCORE() FROM library WHERE MATCH('author^2,name^5', 'frank dune');
|
||||
|
||||
author | name | SCORE()
|
||||
---------------+-------------------+---------------
|
||||
Frank Herbert |Dune |11.443176
|
||||
Frank Herbert |Dune Messiah |9.446629
|
||||
Frank Herbert |Children of Dune |8.043278
|
||||
Frank Herbert |God Emperor of Dune|7.0029488
|
||||
|
||||
// end::multiFieldsMatch
|
||||
;
|
||||
|
||||
optionalParamsForMatch
|
||||
// tag::optionalParamsForMatch
|
||||
SELECT author, name, SCORE() FROM library WHERE MATCH(name, 'to the star', 'operator=or;cutoff_frequency=0.2');
|
||||
|
||||
author | name | SCORE()
|
||||
-----------------+------------------------------------+---------------
|
||||
Peter F. Hamilton|Pandora's Star |3.0997515
|
||||
Douglas Adams |The Hitchhiker's Guide to the Galaxy|3.1756816
|
||||
|
||||
// end::optionalParamsForMatch
|
||||
;
|
||||
|
||||
simpleQueryQuery
|
||||
// tag::simpleQueryQuery
|
||||
SELECT author, name, SCORE() FROM library WHERE QUERY('name:dune');
|
||||
|
||||
author | name | SCORE()
|
||||
---------------+-------------------+---------------
|
||||
Frank Herbert |Dune |2.2886353
|
||||
Frank Herbert |Dune Messiah |1.8893257
|
||||
Frank Herbert |Children of Dune |1.6086556
|
||||
Frank Herbert |God Emperor of Dune|1.4005898
|
||||
// end::simpleQueryQuery
|
||||
;
|
||||
|
||||
advancedQueryQuery
|
||||
// tag::advancedQueryQuery
|
||||
SELECT author, name, page_count, SCORE() FROM library WHERE QUERY('_exists_:"author" AND page_count:>200 AND (name:/star.*/ OR name:duna~)');
|
||||
|
||||
author | name | page_count | SCORE()
|
||||
------------------+-------------------+---------------+---------------
|
||||
Frank Herbert |Dune |604 |3.7164764
|
||||
Frank Herbert |Dune Messiah |331 |3.4169943
|
||||
Frank Herbert |Children of Dune |408 |3.2064917
|
||||
Frank Herbert |God Emperor of Dune|454 |3.0504425
|
||||
Peter F. Hamilton |Pandora's Star |768 |3.0
|
||||
Robert A. Heinlein|Starship Troopers |335 |3.0
|
||||
// end::advancedQueryQuery
|
||||
;
|
||||
|
||||
optionalParameterQuery
|
||||
// tag::optionalParameterQuery
|
||||
SELECT author, name, SCORE() FROM library WHERE QUERY('dune god', 'default_operator=and;default_field=name');
|
||||
|
||||
author | name | SCORE()
|
||||
---------------+-------------------+---------------
|
||||
Frank Herbert |God Emperor of Dune|3.6984892
|
||||
// end::optionalParameterQuery
|
||||
;
|
||||
|
||||
orderByScore
|
||||
// tag::orderByScore
|
||||
SELECT SCORE(), * FROM library WHERE MATCH(name, 'dune') ORDER BY SCORE() DESC;
|
||||
|
|
|
|||
Loading…
Reference in New Issue