Add testing AGGREGATE statements and fix aggregatesTemplate

Author: sylwiaszunejko

Diff for: docker-compose.yml

@@ -4,7 +4,13 @@ services:
   node_1:
     image: ${SCYLLA_IMAGE}
     privileged: true
-    command: --smp 2 --memory 768M --seeds 192.168.100.11 --overprovisioned 1
+    command: |
+      --smp 2
+      --memory 768M
+      --seeds 192.168.100.11
+      --overprovisioned 1
+      --experimental-features udf
+      --enable-user-defined-functions true
     networks:
       public:
         ipv4_address: 192.168.100.11

Diff for: recreate.go

@@ -109,10 +109,10 @@ var functionTemplate = template.Must(template.New("functions").
 		"stripFrozen": cqlHelpers.stripFrozen,
 	}).
 	Parse(`
-CREATE FUNCTION {{ escape .keyspaceName }}.{{ escape .fm.Name }} ( 
+CREATE FUNCTION {{ .keyspaceName }}.{{ .fm.Name }} ( 
     {{- range $i, $args := zip .fm.ArgumentNames .fm.ArgumentTypes }}
     {{- if ne $i 0 }}, {{ end }}
-    {{- escape (index $args 0) }}
+    {{- (index $args 0) }}
     {{ stripFrozen (index $args 1) }}
     {{- end -}})
     {{ if .fm.CalledOnNullInput }}CALLED{{ else }}RETURNS NULL{{ end }} ON NULL INPUT
@@ -167,19 +167,19 @@ var aggregatesTemplate = template.Must(template.New("aggregate").
 	}).
 	Parse(`
 CREATE AGGREGATE {{ .Keyspace }}.{{ .Name }}( 
-    {{- range $arg, $i := .ArgumentTypes }}
+    {{- range $i, $arg := .ArgumentTypes }}
     {{- if ne $i 0 }}, {{ end }}
     {{ stripFrozen $arg }}
     {{- end -}})
     SFUNC {{ .StateFunc.Name }}
-    STYPE {{ stripFrozen .State }}
+    STYPE {{ stripFrozen .StateType }}
     {{- if ne .FinalFunc.Name "" }}
     FINALFUNC {{ .FinalFunc.Name }}
     {{- end -}}
     {{- if ne .InitCond "" }}
     INITCOND {{ .InitCond }}
     {{- end -}}
-);
+;
 `))
 
 func (km *KeyspaceMetadata) aggregateToCQL(w io.Writer, am *AggregateMetadata) error {

Diff for: recreate_test.go

@@ -61,6 +61,12 @@ func TestRecreateSchema(t *testing.T) {
 			Input:    "testdata/recreate/udt.cql",
 			Golden:   "testdata/recreate/udt_golden.cql",
 		},
+		{
+			Name:     "Aggregates",
+			Keyspace: "gocqlx_aggregates",
+			Input:    "testdata/recreate/aggregates.cql",
+			Golden:   "testdata/recreate/aggregates_golden.cql",
+		},
 	}
 
 	for i := range tcs {

Diff for: testdata/recreate/aggregates.cql

@@ -0,0 +1,31 @@
+CREATE KEYSPACE gocqlx_aggregates WITH replication = {
+  'class': 'SimpleStrategy',
+  'replication_factor': '2'
+};
+
+CREATE FUNCTION gocqlx_aggregates.avgstate(
+  state tuple<int, double>,
+  val double)
+CALLED ON NULL INPUT
+RETURNS frozen<tuple<int, double>>
+LANGUAGE lua
+AS $$
+  return { state[1]+1, state[2]+val }
+  $$;
+
+CREATE FUNCTION gocqlx_aggregates.avgfinal(
+  state tuple<int, double>)
+CALLED ON NULL INPUT
+RETURNS double
+LANGUAGE lua
+as $$
+  r=0
+  r=state[2]
+  r=r/state[1]
+  return r
+  $$;
+
+CREATE AGGREGATE gocqlx_aggregates.average(double)
+SFUNC avgstate STYPE tuple<int, double>
+FINALFUNC avgfinal
+INITCOND (0,0.0);

Diff for: testdata/recreate/aggregates_golden.cql

@@ -0,0 +1,33 @@
+CREATE KEYSPACE gocqlx_aggregates WITH replication = {
+    'class': 'SimpleStrategy',
+    'replication_factor': '2'
+};
+
+CREATE FUNCTION gocqlx_aggregates.avgstate (state
+    tuple<int, double>, val
+    double)
+    CALLED ON NULL INPUT
+    RETURNS frozen<tuple<int, double>>
+    LANGUAGE lua
+    AS $$
+  return { state[1]+1, state[2]+val }
+  $$;
+
+CREATE FUNCTION gocqlx_aggregates.avgfinal (state
+    tuple<int, double>)
+    CALLED ON NULL INPUT
+    RETURNS double
+    LANGUAGE lua
+    AS $$
+  r=0
+  r=state[2]
+  r=r/state[1]
+  return r
+  $$;
+
+CREATE AGGREGATE gocqlx_aggregates.average(
+    double)
+    SFUNC avgstate
+    STYPE tuple<int, double>
+    FINALFUNC avgfinal
+    INITCOND (0, 0);