- All this concern Json or Mongo tables based on MongoDB collections.

- Limit decimals of doubles printed from MongoDB
  Done in function Mini for Mongo C Driver and Java Driver
  Done in function SerializeValue for Java tables using the J Driver
        modified:   storage/connect/cmgoconn.cpp
        modified:   storage/connect/json.cpp
        modified:   storage/connect/json.h
        modified:   storage/connect/tabjmg.cpp

- Fix crash when using BSON_TYPE_DECIMAL128
        modified:   storage/connect/cmgoconn.cpp

- Collection name default to table name
  Fix it when creating tables via discovery
        modified:   storage/connect/ha_connect.cc
        modified:   storage/connect/tabbson.cpp
        modified:   storage/connect/tabjson.cpp

storage/connect/cmgoconn.cpp

@@ -26,6 +26,7 @@ bool CMgoConn::IsInit = false;
 
 bool IsArray(PSZ s);
 bool MakeSelector(PGLOBAL g, PFIL fp, PSTRG s);
+int  GetDefaultPrec(void);
 
 /* --------------------------- Class INCOL --------------------------- */
 
@@ -563,7 +564,7 @@ void CMgoConn::ShowDocument(bson_iter_t *iter, const bson_t *doc, const char *k)
 					htrc("%s.%s=%s\n", k, key, str);
 				} break;
 				case BSON_TYPE_DECIMAL128: {
-					char* str = NULL;
+					char str[BSON_DECIMAL128_STRING];
 					bson_decimal128_t dec;
 
 					bson_iter_decimal128(iter, &dec);
@@ -807,21 +808,49 @@ char *CMgoConn::Mini(PGLOBAL g, PCOL colp, const bson_t *bson, bool b)
 {
 	char  *s, *str = NULL;
 	char  *Mbuf = (char*)PlugSubAlloc(g, NULL, (size_t)colp->GetLength() + 1);
-	int   i, k = 0;
-	bool  ok = true;
+	int    i, j = 0, k = 0, n = 0, m = GetDefaultPrec();
+	bool   ok = true, dbl = false;
+	double d;
+	size_t len;
 
 	if (b)
-		s = str = bson_array_as_json(bson, NULL);
+		s = str = bson_array_as_json(bson, &len);
 	else
-		s = str = bson_as_json(bson, NULL);
+		s = str = bson_as_json(bson, &len);
+
+	if (len > (size_t)colp->GetLength()) {
+		sprintf(g->Message, "Value too long for column %s", colp->GetName());
+		bson_free(str);
+		throw (int)TYPE_AM_MGO;
+	}	// endif len
 
 	for (i = 0; i < colp->GetLength() && s[i]; i++) {
 		switch (s[i]) {
 			case ' ':
 				if (ok) continue;
+				break;
 			case '"':
 				ok = !ok;
+				break;
+			case '.':
+				if (j) dbl = true;
+				break;
 			default:
+				if (ok) {
+					if (isdigit(s[i])) {
+						if (!j) j = k;
+						if (dbl) n++;
+					} else if (dbl && n > m) {
+						Mbuf[k] = 0;
+						d = atof(Mbuf + j);
+						n = sprintf(Mbuf + j, "%.*f", m, d);
+						k = j + n;
+						j = n = 0;
+					} else if (j)
+						j = n = 0;
+
+				} // endif ok
+
 				break;
 		} // endswitch s[i]
 
@@ -830,11 +859,6 @@ char *CMgoConn::Mini(PGLOBAL g, PCOL colp, const bson_t *bson, bool b)
 
 	bson_free(str);
 
-	if (i >= colp->GetLength()) {
-		sprintf(g->Message, "Value too long for column %s", colp->GetName());
-		throw (int)TYPE_AM_MGO;
-	}	// endif i
-
 	Mbuf[k] = 0;
 	return Mbuf;
 } // end of Mini
@@ -926,13 +950,13 @@ void CMgoConn::GetColumnValue(PGLOBAL g, PCOL colp)
 				value->SetNull(true);
 				break;
 			case BSON_TYPE_DECIMAL128: {
-				char* str = NULL;
+				char str[BSON_DECIMAL128_STRING];
 				bson_decimal128_t dec;
 
 				bson_iter_decimal128(&Desc, &dec);
 				bson_decimal128_to_string(&dec, str);
 				value->SetValue_psz(str);
-				bson_free(str);
+//			bson_free(str);
 			} break;
 			default:
 				value->Reset();
@@ -956,10 +980,10 @@ bool CMgoConn::AddValue(PGLOBAL g, PCOL colp, bson_t *doc, char *key, bool upd)
 	PVAL value = colp->GetValue();
 
 	if (value->IsNull()) {
-		if (upd)
+//		if (upd)
 			rc = BSON_APPEND_NULL(doc, key);
-		else
-			return false;
+//		else
+//			return false;
 
 	} else switch (colp->GetResultType()) {
 		case TYPE_STRING:

storage/connect/ha_connect.cc

@@ -170,7 +170,7 @@
 #define JSONMAX      10             // JSON Default max grp size
 
 extern "C" {
-       char version[]= "Version 1.07.0003 April 02, 2021";
+       char version[]= "Version 1.07.0003 May 02, 2021";
 #if defined(__WIN__)
        char compver[]= "Version 1.07.0003 " __DATE__ " "  __TIME__;
        char slash= '\\';
@@ -5940,9 +5940,10 @@ static int connect_assisted_discovery(handlerton *, THD* thd,
 
 				if (!fn && !zfn && !mul && !dsn)
 					sprintf(g->Message, "Missing %s file name", topt->type);
-				else
-					ok= true;
+				else if (dsn && !topt->tabname)
+          topt->tabname= tab;
 
+				ok= true;
 				break;
 #if defined(JAVA_SUPPORT)
 			case TAB_MONGO:

storage/connect/json.cpp

@@ -245,6 +245,7 @@ PSZ Serialize(PGLOBAL g, PJSON jsp, char* fn, int pretty) {
 
   try {
     jdp = new(g) JDOC; // MUST BE ALLOCATED BEFORE jp !!!!!
+    jdp->dfp = GetDefaultPrec();
 
     if (!jsp) {
       strcpy(g->Message, "Null json tree");
@@ -1005,8 +1006,8 @@ bool JDOC::SerializeValue(PJVAL jvp)
     case TYPE_BINT:
       sprintf(buf, "%lld", jvp->LLn);
       return js->WriteStr(buf);
-    case TYPE_DBL:
-      sprintf(buf, "%.*lf", jvp->Nd, jvp->F);
+    case TYPE_DBL:  // dfp to limit to the default number of decimals
+      sprintf(buf, "%.*f", MY_MIN(jvp->Nd, dfp), jvp->F);
       return js->WriteStr(buf);
     case TYPE_NULL:
       return js->WriteStr("null");

storage/connect/json.h

@@ -75,7 +75,7 @@ class JDOC: public BLOCK {
 	friend PJSON ParseJson(PGLOBAL, char*, size_t, int*, bool*);
 	friend PSZ Serialize(PGLOBAL, PJSON, char*, int);
 public:
-	JDOC(void) : js(NULL), s(NULL), len(0), pty(NULL) {}
+	JDOC(void) : js(NULL), s(NULL), len(0), dfp(0), pty(NULL) {}
 
 	void  SetJp(JOUT* jp) { js = jp; }
 
@@ -94,7 +94,7 @@ public:
  private:
 	JOUT* js;
 	char *s;
-	int   len;
+	int   len, dfp;
 	bool *pty;
 }; // end of class JDOC
 

storage/connect/tabbson.cpp

@@ -218,8 +218,7 @@ int BSONDISC::GetColumns(PGLOBAL g, PCSZ db, PCSZ dsn, PTOS topt)
 
   if (tdp->Uri) {
 #if defined(JAVA_SUPPORT) || defined(CMGO_SUPPORT)
-    tdp->Collname = GetStringTableOption(g, topt, "Name", NULL);
-    tdp->Collname = GetStringTableOption(g, topt, "Tabname", tdp->Collname);
+    tdp->Collname = GetStringTableOption(g, topt, "Tabname", NULL);
     tdp->Schema = GetStringTableOption(g, topt, "Dbname", "test");
     tdp->Options = (PSZ)GetStringTableOption(g, topt, "Colist", "all");
     tdp->Pipe = GetBooleanTableOption(g, topt, "Pipeline", false);

storage/connect/tabjmg.cpp

@@ -505,6 +505,7 @@ char *JMGCOL::Mini(PGLOBAL g, const bson_t *bson, bool b)
 		switch (s[i]) {
 			case ' ':
 				if (ok) continue;
+				break;
 			case '"':
 				ok = !ok;
 			default:

storage/connect/tabjson.cpp

@@ -222,8 +222,7 @@ int JSONDISC::GetColumns(PGLOBAL g, PCSZ db, PCSZ dsn, PTOS topt)
 
   if (tdp->Uri) {
 #if defined(JAVA_SUPPORT) || defined(CMGO_SUPPORT)
-    tdp->Collname = GetStringTableOption(g, topt, "Name", NULL);
-    tdp->Collname = GetStringTableOption(g, topt, "Tabname", tdp->Collname);
+    tdp->Collname = GetStringTableOption(g, topt, "Tabname", NULL);
     tdp->Schema = GetStringTableOption(g, topt, "Dbname", "test");
     tdp->Options = (PSZ)GetStringTableOption(g, topt, "Colist", "all");
     tdp->Pipe = GetBooleanTableOption(g, topt, "Pipeline", false);