Support APPROX_PERCENTILE function (#1002)

* support approx_percentile function * update Co-authored-by: kennytm <kennytm@gmail.com>
pingcap · Sep 4, 2020 · 39e9c7b · 39e9c7b
1 parent b0b7759
commit 39e9c7b
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Showing 5 changed files with 7,921 additions and 7,889 deletions.
diff --git a/ast/functions.go b/ast/functions.go
@@ -710,6 +710,8 @@ const (
 	AggFuncJsonObjectAgg = "json_objectagg"
 	// AggFuncApproxCountDistinct is the name of approx_count_distinct function.
 	AggFuncApproxCountDistinct = "approx_count_distinct"
+	// AggFuncApproxPercentile is the name of approx_percentile function.
+	AggFuncApproxPercentile = "approx_percentile"
 )
 
 // AggregateFuncExpr represents aggregate function expression.

diff --git a/misc.go b/misc.go
@@ -158,6 +158,8 @@ var tokenMap = map[string]int{
 	"ANALYZE":                  analyze,
 	"AND":                      and,
 	"ANY":                      any,
+	"APPROX_COUNT_DISTINCT":    approxCountDistinct,
+	"APPROX_PERCENTILE":        approxPercentile,
 	"AS":                       as,
 	"ASC":                      asc,
 	"ASCII":                    ascii,
@@ -234,7 +236,6 @@ var tokenMap = map[string]int{
 	"CONVERT":                  convert,
 	"COPY":                     copyKwd,
 	"CORRELATION":              correlation,
-	"APPROX_COUNT_DISTINCT":    approxCountDistinct,
 	"CPU":                      cpu,
 	"CREATE":                   create,
 	"CROSS":                    cross,
@@ -755,6 +756,7 @@ var btFuncTokenMap = map[string]int{
 	"CAST":                  builtinCast,
 	"COUNT":                 builtinCount,
 	"APPROX_COUNT_DISTINCT": builtinApproxCountDistinct,
+	"APPROX_PERCENTILE":     builtinApproxPercentile,
 	"CURDATE":               builtinCurDate,
 	"CURTIME":               builtinCurTime,
 	"DATE_ADD":              builtinDateAdd,