add oct to registry

Author: elianddb

sql/expression/function/oct.go

@@ -21,7 +21,7 @@ import (
 	"github.com/dolthub/go-mysql-server/sql/types"
 )
 
-// Oct function provides a string representation for the octal value of N, where N is a decimal number.
+// Oct function provides a string representation for the octal value of N, where N is a decimal (base 10) number.
 type Oct struct {
 	n sql.Expression
 }
@@ -39,7 +39,7 @@ func (o *Oct) FunctionName() string {
 
 // Description implements sql.FunctionExpression.
 func (o *Oct) Description() string {
-	return "returns a string representation for octal value of N, where N is a decimal number."
+	return "returns a string representation for octal value of N, where N is a decimal (base 10) number."
 }
 
 // Type implements the Expression interface.

sql/expression/function/registry.go

@@ -184,6 +184,7 @@ var BuiltIns = []sql.Function{
 	sql.Function1{Name: "ntile", Fn: window.NewNTile},
 	sql.FunctionN{Name: "now", Fn: NewNow},
 	sql.Function2{Name: "nullif", Fn: NewNullIf},
+	sql.Function1{Name: "oct", Fn: NewOct},
 	sql.Function1{Name: "octet_length", Fn: NewLength},
 	sql.Function1{Name: "ord", Fn: NewOrd},
 	sql.Function0{Name: "pi", Fn: NewPi},