Squashed commit of connect/10.0:

commit 02d8c21380f
Author: Olivier Bertrand <bertrandop@gmail.com>
Date:   Sat Oct 6 16:27:13 2018 +0200

    - Fix truncating error messages on first unrecognized latin1 character
      modified:   storage/connect/ha_connect.cc

    - Fix MDEV-17343
      Reject multi-table UPDATE/DELETE commands that crash on some systems
      modified:   storage/connect/ha_connect.cc
      modified:   storage/connect/tabext.cpp

    - Try to fix failing tests (MariaDB version 10.0 only)
      modified:   storage/connect/mysql-test/connect/disabled.def

    - Typo
      modified:   storage/connect/global.h

commit f83caed8569
Author: Olivier Bertrand <bertrandop@gmail.com>
Date:   Tue Sep 25 15:49:26 2018 +0200

    - Try to fix failing tests (MariaDB version 10.0 only)
      modified:   storage/connect/mysql-test/connect/disabled.def
      modified:   storage/connect/mysql-test/connect/r/grant2.result
      modified:   storage/connect/mysql-test/connect/r/infoschema2-9739.result
      modified:   storage/connect/mysql-test/connect/r/mysql_exec.result

commit 9fd6f178846
Author: Olivier Bertrand <bertrandop@gmail.com>
Date:   Sun Sep 23 19:45:59 2018 +0200

    - Implement the CHECK TABLE statement and accept REPAIR and ANALYZE
      modified:   storage/connect/connect.cc
      modified:   storage/connect/ha_connect.cc
      modified:   storage/connect/ha_connect.h
      modified:   storage/connect/tabjdbc.cpp
      modified:   storage/connect/tabmysql.cpp
      modified:   storage/connect/tabodbc.cpp

    - MDEV-17212: Test if NumResultCols is implemented by the data source
      modified:   storage/connect/odbconn.cpp

    - Change error type in Optimize
      modified:   storage/connect/ha_connect.cc

    - Update version date
      modified:   storage/connect/ha_connect.cc

    - Record new result from odbc_postgresql.test
      modified:   storage/connect/mysql-test/connect/r/odbc_postgresql.result

commit d8cf51319e1
Author: Olivier Bertrand <bertrandop@gmail.com>
Date:   Wed Aug 8 12:18:52 2018 +0200

    - Comment out failing Cyrillic test in xml2.test
      modified:   storage/connect/mysql-test/connect/r/xml2.result
      modified:   storage/connect/mysql-test/connect/t/xml2.test

commit 9df49e21f9e
Author: Olivier Bertrand <bertrandop@gmail.com>
Date:   Tue Aug 7 15:01:06 2018 +0200

    - Fix MDEV-16672 Connect: Warnings with 10.0
      filamtxt.cpp: DOSFAM::RenameTempFile: Change sprintf to snprintf.
      filamvct.cpp: VECFAM::RenameTempFile: Change sprintf to snprintf.
      javaconn.cpp:
        Add JAVAConn::GetUTFString function.
        Use it instead of env->GetStringUTFChars.
        Fix wrong identation.
      javaconn.h: Add GetUTFString declaration.
      jdbconn.cpp:
        Use GetUTFString function instead of env->GetStringUTFChars.
      jmgoconn.cpp:
        Use GetUTFString function instead of env->GetStringUTFChars.
        Fix wrong identation.
      jsonudf.cpp: change 139 to BMX line 4631.
      tabjmg.cpp:
        Add ReleaseStringUTF.
        Fix wrong identation.
      tabpivot.cpp: Fix wrong identation.
      tabutil.cpp: TDBPRX::GetSubTable: Change sprintf to snprintf.
      modified:   storage/connect/filamtxt.cpp
      modified:   storage/connect/filamvct.cpp
      modified:   storage/connect/javaconn.cpp
      modified:   storage/connect/javaconn.h
      modified:   storage/connect/jdbconn.cpp
      modified:   storage/connect/jmgoconn.cpp
      modified:   storage/connect/jsonudf.cpp
      modified:   storage/connect/tabjmg.cpp
      modified:   storage/connect/tabpivot.cpp
      modified:   storage/connect/tabutil.cpp

    - Fix MDEV-16895 CONNECT engine's get_error_message can cause buffer
                     overflow and server crash with long queries
      ha_connect_cc: Update version.
        get_error_message: Remove charset conversion.
      modified:   storage/connect/ha_connect.cc

    - Fix a server crash on inserting bigint to a JDBC table
      JDBConn::SetUUID:
        Suppress check on ctyp that causes a server crash because ctyp
        can be negative and this triggers an DEBUG_ASSERT on return.
      modified:   storage/connect/jdbconn.cpp

    - Delete an assert(qrp) from JCATPARM *AllocCatInfo that is called with
      qrp=NULL from JDBConn::SetUUID. Also delete a clone of this function
      that was duplicated in javaconn.cpp.
      modified:   storage/connect/javaconn.cpp
      modified:   storage/connect/jdbconn.cpp

    - Update some disabled tests and results to avoid failure
      modified:   storage/connect/mysql-test/connect/r/jdbc.result
      modified:   storage/connect/mysql-test/connect/r/json_java_2.result
      modified:   storage/connect/mysql-test/connect/r/json_java_3.result
      modified:   storage/connect/mysql-test/connect/r/mongo_java_2.result
      modified:   storage/connect/mysql-test/connect/r/mongo_java_3.result
      modified:   storage/connect/mysql-test/connect/t/json_java_2.test
      modified:   storage/connect/mysql-test/connect/t/json_java_3.test
      modified:   storage/connect/mysql-test/connect/t/mongo_java_2.test
      modified:   storage/connect/mysql-test/connect/t/mongo_java_3.test

commit 415273eb193
Author: Olivier Bertrand <bertrandop@gmail.com>
Date:   Thu Jun 28 19:37:49 2018 +0200

    - Fix MDEV-16167 Cannot insert unsigned values into a VEC table
      modified:   storage/connect/filamvct.cpp
      modified:   storage/connect/tabvct.cpp

commit 9ffcb68a9f2
Author: Olivier Bertrand <bertrandop@gmail.com>
Date:   Mon May 7 22:43:43 2018 +0200

    - Fix MDEV-15735 CONNECT [filamtxt.cpp:429]: Suspicious condition
      modified:   storage/connect/filamtxt.cpp

    - Fix compiler warnings
      modified:   storage/connect/domdoc.cpp
      modified:   storage/connect/ha_connect.cc
      modified:   storage/connect/json.h
      modified:   storage/connect/jsonudf.cpp
      modified:   storage/connect/tabext.cpp
      modified:   storage/connect/tabjson.cpp
      modified:   storage/connect/tabjson.h

    - Miscelleanous from 10.3
      modified:   storage/connect/ha_connect.cc
      modified:   storage/connect/mycat.cc
      modified:   storage/connect/user_connect.cc

storage/connect/tabjson.h

@@ -16,6 +16,7 @@ typedef class JSONDEF *PJDEF;
 typedef class TDBJSON *PJTDB;
 typedef class JSONCOL *PJCOL;
 class TDBJSN;
+PQRYRES JSONColumns(PGLOBAL g, PCSZ db, PCSZ dsn, PTOS topt, bool info);
 
 /***********************************************************************/
 /*  The JSON tree node. Can be an Object or an Array.           	  	 */