Implement IN function

query_executors/memory_executor/misc_functions.go

@@ -0,0 +1,18 @@
+package memoryexecutor
+
+import (
+	"github.com/pikami/cosmium/parsers"
+)
+
+func misc_In(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
+	value := getFieldValue(arguments[0].(parsers.SelectItem), queryParameters, row)
+
+	for i := 1; i < len(arguments); i++ {
+		compareValue := getFieldValue(arguments[i].(parsers.SelectItem), queryParameters, row)
+		if compareValues(value, compareValue) == 0 {
+			return true
+		}
+	}
+
+	return false
+}