Fix MDEV-12603 Insert replaces values in ZIP file

  modified:   storage/connect/filamzip.cpp
  modified:   storage/connect/filamzip.h

Fix MDEV-12686 Handle null in json
Fix MDEV-12688 Insert does not handle type TINYINT
  modified:   storage/connect/json.cpp
  modified:   storage/connect/tabjson.cpp

storage/connect/filamzip.cpp

 /*********** File AM Zip C++ Program Source Code File (.CPP) ***********/
 /* PROGRAM NAME: FILAMZIP                                              */
 /* -------------                                                       */
-/*  Version 1.2                                                        */
+/*  Version 1.3                                                        */
 /*                                                                     */
 /* COPYRIGHT:                                                          */
 /* ----------                                                          */
@@ -633,6 +633,28 @@ bool UNZIPUTL::OpenTable(PGLOBAL g, MODE mode, char *fn)
 	return false;
 } // end of OpenTableFile
 
+/***********************************************************************/
+/*  Insert only if the entry does not exist.   												 */
+/***********************************************************************/
+bool UNZIPUTL::IsInsertOk(PGLOBAL g, char *fn)
+{
+	bool ok = true, b = open(g, fn);
+
+	if (!b) {
+		if (!target || *target == 0) {
+			unz_global_info64 ginfo;
+			int err = unzGetGlobalInfo64(zipfile, &ginfo);
+
+			ok = !(err == UNZ_OK && ginfo.number_entry > 0);
+		} else						// Check if the target exist
+			ok = (unzLocateFile(zipfile, target, 0) != UNZ_OK);
+
+		unzClose(zipfile);
+	} // endif b
+
+	return ok;
+} // end of IsInsertOk
+
 /***********************************************************************/
 /*  Open target in zip file.						      												 */
 /***********************************************************************/
@@ -1006,6 +1028,25 @@ bool ZIPFAM::OpenTableFile(PGLOBAL g)
 {
 	char filename[_MAX_PATH];
 	MODE mode = Tdbp->GetMode();
+	int  len = TXTFAM::GetFileLength(g);
+
+	//  We used the file name relative to recorded datapath
+	PlugSetPath(filename, To_File, Tdbp->GetPath());
+
+	if (len < 0)
+		return true;
+	else if (!append && len > 0) {
+		strcpy(g->Message, "No insert into existing zip file");
+		return true;
+	} else if (append && len > 0) {
+		UNZIPUTL *zutp = new(g) UNZIPUTL(target, false);
+
+		if (!zutp->IsInsertOk(g, filename)) {
+			strcpy(g->Message, "No insert into existing entry");
+			return true;
+		}	// endif Ok
+
+	} // endif's
 
 	/*********************************************************************/
 	/*  Allocate the ZIP utility class.                                  */
@@ -1065,7 +1106,7 @@ ZPXFAM::ZPXFAM(PDOSDEF tdp) : FIXFAM(tdp)
 	target = tdp->GetEntry();
 	append = tdp->GetAppend();
 	//Lrecl = tdp->GetLrecl();
-} // end of UZXFAM standard constructor
+} // end of ZPXFAM standard constructor
 
 /***********************************************************************/
 /*  OpenTableFile: Open a DOS/UNIX table file from a ZIP file.         */
@@ -1074,6 +1115,22 @@ bool ZPXFAM::OpenTableFile(PGLOBAL g)
 {
 	char filename[_MAX_PATH];
 	MODE mode = Tdbp->GetMode();
+	int  len = TXTFAM::GetFileLength(g);
+
+	if (len < 0)
+		return true;
+	else if (!append && len > 0) {
+		strcpy(g->Message, "No insert into existing zip file");
+		return true;
+	} else if (append && len > 0) {
+		UNZIPUTL *zutp = new(g) UNZIPUTL(target, false);
+
+		if (!zutp->IsInsertOk(g, filename)) {
+			strcpy(g->Message, "No insert into existing entry");
+			return true;
+		}	// endif Ok
+
+	} // endif's
 
 	/*********************************************************************/
 	/*  Allocate the ZIP utility class.                                  */

storage/connect/filamzip.h

 /************** filamzip H Declares Source Code File (.H) **************/
-/*  Name: filamzip.h   Version 1.1                                     */
+/*  Name: filamzip.h   Version 1.2                                     */
 /*                                                                     */
 /*  (C) Copyright to the author Olivier BERTRAND          2016-2017    */
 /*                                                                     */
@@ -77,6 +77,7 @@ class DllExport UNZIPUTL : public BLOCK {
 	bool WildMatch(PSZ pat, PSZ str);
 	int  findEntry(PGLOBAL g, bool next);
 	int  nextEntry(PGLOBAL g);
+	bool IsInsertOk(PGLOBAL g, char *fn);
 
 	// Members
 	unzFile         zipfile;							// The ZIP container file

storage/connect/json.cpp

@@ -1432,7 +1432,7 @@ void JVALUE::SetTiny(PGLOBAL g, char n)
 {
 	Value = AllocateValue(g, &n, TYPE_TINY);
 	Jsp = NULL;
-} // end of SetInteger
+} // end of SetTiny
 
 /***********************************************************************/
 /* Set the Value's value as the given big integer.                     */
@@ -1466,6 +1466,6 @@ void JVALUE::SetString(PGLOBAL g, PSZ s, short c)
 /***********************************************************************/
 bool JVALUE::IsNull(void)
 {
-  return (Jsp) ? Jsp->IsNull() : (Value) ? Value->IsZero() : true;
+	return (Jsp) ? Jsp->IsNull() : (Value) ? Value->IsNull() : true;
 } // end of IsNull
 

storage/connect/tabjson.cpp

@@ -1193,11 +1193,11 @@ void JSONCOL::SetJsonValue(PGLOBAL g, PVAL vp, PJVAL val, int n)
 //        } // endif Type
      
       default:
-        vp->Reset();
+				vp->SetNull(true);
 		} // endswitch Type
 
   } else
-    vp->Reset();
+		vp->SetNull(true);
 
   } // end of SetJsonValue
 
@@ -1211,7 +1211,7 @@ void JSONCOL::ReadColumn(PGLOBAL g)
 
   // Set null when applicable
   if (Nullable)
-    Value->SetNull(Value->IsZero());
+		Value->SetNull(Value->IsNull());
 
   } // end of ReadColumn
 
@@ -1548,6 +1548,7 @@ void JSONCOL::WriteColumn(PGLOBAL g)
       // Passthru
     case TYPE_DATE:
     case TYPE_INT:
+		case TYPE_TINY:
 		case TYPE_SHORT:
 		case TYPE_BIGINT:
 		case TYPE_DOUBLE: