This is a major update of CONNECT that goes from version 1.1 to 1.2

===================================================================
- Implement a first support of the ALTER TABLE command. This fixes MDEV-5440
  but does much more than only that. See the details of how ALTER is supported
  in the new documentation and also in MDEV-5440 comment.
  This is done principally by implementing for CONNECT the virtual function
  check_if_supported_inplace_alter.
modified:
  storage/connect/connect.cc
  storage/connect/global.h
  storage/connect/ha_connect.cc
  storage/connect/ha_connect.h
  storage/connect/mysql-test/connect/r/bin.result
  storage/connect/mysql-test/connect/r/csv.result
  storage/connect/mysql-test/connect/r/dbf.result
  storage/connect/mysql-test/connect/r/dir.result
  storage/connect/mysql-test/connect/r/fix.result
  storage/connect/mysql-test/connect/r/index.result
  storage/connect/mysql-test/connect/r/ini.result
  storage/connect/mysql-test/connect/r/occur.result
  storage/connect/mysql-test/connect/r/pivot.result
  storage/connect/mysql-test/connect/r/vec.result
  storage/connect/mysql-test/connect/t/dbf.test
  storage/connect/plugutil.c
  storage/connect/user_connect.cc

- Fixes the tabname/table_name issue for XML tables. Implement
  multiple files XML tables.
modified:
  storage/connect/tabxml.cpp
  storage/connect/tabxml.h

- Set to varchar(256) the fields of catalog tables stored
  as STRBLK's (had length 0 --> CHAR(1))
  Add the GetCharString function to the VALBLK class
modified:
  storage/connect/ha_connect.cc
  storage/connect/valblk.cpp
  storage/connect/valblk.h
  storage/connect/value.cpp

- Translate CONNECT error messages to system_charset
  to avoid truncation on not ASCII characters.
modified:
  storage/connect/ha_connect.cc

- Update version number
modified:
  storage/connect/ha_connect.cc
  storage/connect/mysql-test/connect/r/xml.result

- Move the TDBASE::data_charset body from xtable.h to table.cpp.
  (dont' remember why)
modified:
  storage/connect/table.cpp
  storage/connect/xtable.h

- Other modifications are to enhance the support of OEM tables.
  In particular, they can now provide column definition in dicovery.
modified:
  storage/connect/colblk.h
  storage/connect/global.h
  storage/connect/ha_connect.cc
  storage/connect/mycat.cc
  storage/connect/plgcnx.h
  storage/connect/plgdbsem.h
  storage/connect/xtable.h

- Or to add or modify tracing.
modified:
  storage/connect/filamtxt.cpp
  storage/connect/ha_connect.cc
  storage/connect/plgdbutl.cpp
  storage/connect/tabfix.cpp
  storage/connect/tabmysql.cpp

1 files changed, 43 insertions, 2 deletions

diff --git a/storage/connect/valblk.cpp b/storage/connect/valblk.cpp
index bef5d6ef716..c0127072896 100644
--- a/storage/connect/valblk.cpp
+++ b/storage/connect/valblk.cpp
@@ -1,7 +1,7 @@
 /************ Valblk C++ Functions Source Code File (.CPP) *************/
-/*  Name: VALBLK.CPP  Version 2.0                                      */
+/*  Name: VALBLK.CPP  Version 2.1                                      */
 /*                                                                     */
-/*  (C) Copyright to the author Olivier BERTRAND          2005-2013    */
+/*  (C) Copyright to the author Olivier BERTRAND          2005-2014    */
 /*                                                                     */
 /*  This file contains the VALBLK and derived classes functions.       */
 /*  Second family is VALBLK, representing simple suballocated arrays   */
@@ -237,6 +237,23 @@ void TYPBLK<TYPE>::Init(PGLOBAL g, bool check)
   } // end of Init
 
 /***********************************************************************/
+/*  TYPVAL GetCharString: get string representation of a typed value.  */
+/***********************************************************************/
+template <class TYPE>
+char *TYPBLK<TYPE>::GetCharString(char *p, int n)
+  {
+  sprintf(p, Fmt, Typp[n]);
+  return p;
+  } // end of GetCharString
+
+template <>
+char *TYPBLK<double>::GetCharString(char *p, int n)
+  {
+  sprintf(p, Fmt, Prec, Typp[n]);
+  return p;
+  } // end of GetCharString
+
+/***********************************************************************/
 /*  Set one value in a block.                                          */
 /***********************************************************************/
 template <class TYPE>
@@ -678,6 +695,14 @@ double CHRBLK::GetFloatValue(int n)
   } // end of GetFloatValue
 
 /***********************************************************************/
+/*  STRING GetCharString: get string representation of a char value.   */
+/***********************************************************************/
+char *CHRBLK::GetCharString(char *p, int n)
+  {
+  return (char *)GetValPtrEx(n);
+  } // end of GetCharString
+
+/***********************************************************************/
 /*  Set one value in a block.                                          */
 /***********************************************************************/
 void CHRBLK::SetValue(PVAL valp, int n)
@@ -1186,6 +1211,22 @@ bool DATBLK::SetFormat(PGLOBAL g, PSZ fmt, int len, int year)
   } // end of SetFormat
 
 /***********************************************************************/
+/*  DTVAL GetCharString: get string representation of a date value.    */
+/***********************************************************************/
+char *DATBLK::GetCharString(char *p, int n)
+  {
+  char *vp;
+
+  if (Dvalp) {
+    Dvalp->SetValue(Typp[n]);
+    vp = Dvalp->GetCharString(p);
+  } else
+    vp = TYPBLK<int>::GetCharString(p, n);
+
+  return vp;
+  } // end of GetCharString
+
+/***********************************************************************/
 /*  Set one value in a block from a char string.                       */
 /***********************************************************************/
 void DATBLK::SetValue(PSZ p, int n)