- Fix MDEV-18192: CONNECT Engine JDBC not able to issue

  simple UPDATE statement from trigger or stored procedure
  modified:   storage/connect/tabext.cpp
  modified:   storage/connect/tabext.h
  modified:   storage/connect/tabjdbc.cpp

- JSONColumns: Copy locally constant strings to fix error in OEM modules
  modified:   storage/connect/tabjson.cpp

storage/connect/tabext.cpp

@@ -445,6 +445,43 @@ bool TDBEXT::MakeSQL(PGLOBAL g, bool cnt)
 	return false;
 } // end of MakeSQL
 
+/***********************************************************************/
+/*  Remove the NAME_CONST functions that are added by procedures.      */
+/***********************************************************************/
+void TDBEXT::RemoveConst(PGLOBAL g, char *stmt)
+{
+	char *p, *p2;
+	char  val[1025], nval[1025];
+	int   n, nc;
+
+	while ((p = strstr(stmt, "NAME_CONST")))
+		if ((n = sscanf(p, "%*[^,],%1024[^)])%n", val, &nc))) {
+			if (trace(33))
+				htrc("p=%s\nn=%d val=%s nc=%d\n", p, n, val, nc);
+
+			*p = 0;
+
+			if ((p2 = strstr(val, "'"))) {
+				if ((n = sscanf(p2, "%*['\\]%1024[^'\\]", nval))) {
+					if (trace(33))
+						htrc("p2=%s\nn=%d nval=%s\n", p2, n, nval);
+
+					strcat(strcat(strcat(strcat(stmt, "'"), nval), "'"), p + nc);
+				} else
+					break;
+
+			} else
+				strcat(strcat(strcat(strcat(stmt, "("), val), ")"), p + nc);
+
+			if (trace(33))
+				htrc("stmt=%s\n", stmt);
+
+		} else
+			break;
+
+		return;
+} // end of RemoveConst
+
 /***********************************************************************/
 /*  MakeCommand: make the Update or Delete statement to send to the    */
 /*  MySQL server. Limited to remote values and filtering.              */
@@ -524,6 +561,8 @@ bool TDBEXT::MakeCommand(PGLOBAL g)
 			stmt[i++] = (Qrystr[k] == '`') ? q : Qrystr[k];
 		} while (Qrystr[k++]);
 
+		RemoveConst(g, stmt);
+
 		if (body)
 			strcat(stmt, body);
 

storage/connect/tabext.h

@@ -130,6 +130,7 @@ class DllExport TDBEXT : public TDB {
 	virtual bool MakeSQL(PGLOBAL g, bool cnt);
 	//virtual bool MakeInsert(PGLOBAL g);
 	virtual bool MakeCommand(PGLOBAL g);
+	void RemoveConst(PGLOBAL g, char *stmt);
 	int Decode(PCSZ utf, char *buf, size_t n);
 
 	// Members

storage/connect/tabjdbc.cpp

@@ -558,33 +558,42 @@ bool TDBJDBC::OpenDB(PGLOBAL g)
 		     this, Tdb_No, Use, Mode);
 
 	if (Use == USE_OPEN) {
-		/*******************************************************************/
-		/*  Table already open, just replace it at its beginning.          */
-		/*******************************************************************/
-		if (Memory == 1) {
-			if ((Qrp = Jcp->AllocateResult(g, this)))
-				Memory = 2;            // Must be filled
-			else
-				Memory = 0;            // Allocation failed, don't use it
-
-		} else if (Memory == 2)
-			Memory = 3;              // Ok to use memory result
-
-		if (Memory < 3) {
-			// Method will depend on cursor type
-			if ((Rbuf = Query ? Jcp->Rewind(Query->GetStr()) : 0) < 0)
-				if (Mode != MODE_READX) {
-					Jcp->Close();
-				  return true;
-			  } else
-				  Rbuf = 0;
+		if (Mode == MODE_READ || Mode == MODE_READX) {
+			/*****************************************************************/
+			/*  Table already open, just replace it at its beginning.        */
+			/*****************************************************************/
+			if (Memory == 1) {
+				if ((Qrp = Jcp->AllocateResult(g, this)))
+					Memory = 2;            // Must be filled
+				else
+					Memory = 0;            // Allocation failed, don't use it
 
-		} else
-			Rbuf = Qrp->Nblin;
+			} else if (Memory == 2)
+				Memory = 3;              // Ok to use memory result
+
+			if (Memory < 3) {
+				// Method will depend on cursor type
+				if ((Rbuf = Query ? Jcp->Rewind(Query->GetStr()) : 0) < 0)
+					if (Mode != MODE_READX) {
+						Jcp->Close();
+						return true;
+					} else
+						Rbuf = 0;
+
+			} else
+				Rbuf = Qrp->Nblin;
+
+			CurNum = 0;
+			Fpos = 0;
+			Curpos = 1;
+		} else if (Mode == MODE_UPDATE || Mode == MODE_DELETE) {
+			// new update coming from a trigger or procedure
+			Query = NULL;
+			SetCondFil(NULL);
+			Qrystr = To_Def->GetStringCatInfo(g, "Query_String", "?");
+		} else {  //if (Mode == MODE_INSERT)
+		} // endif Mode
 
-		CurNum = 0;
-		Fpos = 0;
-		Curpos = 1;
 		return false;
 	} // endif use
 

storage/connect/tabjson.cpp

@@ -110,8 +110,8 @@ PQRYRES JSONColumns(PGLOBAL g, PCSZ db, PCSZ dsn, PTOS topt, bool info)
                           buftyp, fldtyp, length, false, false);
 
   crp = qrp->Colresp->Next->Next->Next->Next->Next->Next;
-  crp->Name = "Nullable";
-  crp->Next->Name = "Jpath";
+	crp->Name = PlugDup(g, "Nullable");
+	crp->Next->Name = PlugDup(g, "Jpath");
 
   if (info || !qrp)
     return qrp;