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docs/reference/esql/functions/count-distinct.asciidoc

@@ -40,7 +40,11 @@ properties:
 include::../../aggregations/metrics/cardinality-aggregation.asciidoc[tag=explanation]
 
 The `COUNT_DISTINCT` function takes an optional second parameter to configure
-the precision threshold.
+the precision threshold. The precision_threshold options allows to trade memory
+for accuracy, and defines a unique count below which counts are expected to be
+close to accurate. Above this value, counts might become a bit more fuzzy. The
+maximum supported value is 40000, thresholds above this number will have the
+same effect as a threshold of 40000. The default value is `3000`.
 
 *Supported types*
 

docs/reference/esql/functions/left.asciidoc

@@ -17,7 +17,7 @@ The number of characters to return.
 
 *Description*
 
-Returns the substring that extracts 'length' chars from the 'string' starting
+Returns the substring that extracts 'length' chars from 'str' starting
 from the left.
 
 *Supported types*

docs/reference/esql/functions/log10.asciidoc

@@ -12,11 +12,10 @@ Numeric expression. If `null`, the function returns `null`.
 
 *Description*
 
-Returns the logarithm to base 10. The input can be any numeric value, the return value
-is always a double.
+Returns the logarithm to base 10. The input can be any numeric value, the return
+value is always a double.
 
-Logs of negative numbers are NaN. Logs of infinites are infinite, as is the log
-of 0.
+Logs of 0, negative numbers, and infinites return `null` as well as a warning.
 
 *Supported types*
 

docs/reference/esql/functions/right.asciidoc

@@ -17,7 +17,7 @@ The number of characters to return.
 
 *Description*
 
-Return the substring that extracts 'length' chars from the 'string' starting
+Return the substring that extracts 'length' chars from 'str' starting
 from the right.
 
 *Supported types*