feature(udf): implement drop function

source/libs/parser/src/parTranslater.c

@@ -3127,6 +3127,13 @@ static int32_t translateCreateFunction(STranslateContext* pCxt, SCreateFunctionS
   return code;
 }
 
+static int32_t translateDropFunction(STranslateContext* pCxt, SDropFunctionStmt* pStmt) {
+  SDropFuncReq req = {0};
+  strcpy(req.name, pStmt->funcName);
+  req.igNotExists = pStmt->ignoreNotExists;
+  return buildCmdMsg(pCxt, TDMT_MND_DROP_FUNC, (FSerializeFunc)tSerializeSDropFuncReq, &req);
+}
+
 static int32_t translateGrant(STranslateContext* pCxt, SGrantStmt* pStmt) {
   SAlterUserReq req = {0};
   if (PRIVILEGE_TYPE_TEST_MASK(pStmt->privileges, PRIVILEGE_TYPE_ALL) ||
@@ -3266,6 +3273,9 @@ static int32_t translateQuery(STranslateContext* pCxt, SNode* pNode) {
     case QUERY_NODE_CREATE_FUNCTION_STMT:
       code = translateCreateFunction(pCxt, (SCreateFunctionStmt*)pNode);
       break;
+    case QUERY_NODE_DROP_FUNCTION_STMT:
+      code = translateDropFunction(pCxt, (SDropFunctionStmt*)pNode);
+      break;
     case QUERY_NODE_GRANT_STMT:
       code = translateGrant(pCxt, (SGrantStmt*)pNode);
       break;

tests/script/tsim/query/udf.sim

@@ -93,6 +93,18 @@ endi
 if $data00 != 2.645751311 then
   return -1
 endi
-#sql drop function udf1;
-#sql drop function udf2;
+sql drop function udf1;
+sql show functions;
+if $rows != 1 then
+  return -1
+endi
+if $data00 != @udf2@ then
+  return -1
+  endi
+sql drop function udf2;
+sql show functions;
+if $rows != 0 then
+  return -1
+endi
+
 system sh/exec.sh -n dnode1 -s stop -x SIGTERM