fix: Create table with character column issue (#6)

* fix: Create table with character column issue

Suspect the failure occurs in `getNewTextDesc` during ILECALL to IBM i
[QlgTextDescToDesc](https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_72/apis/QLGCVTTDD.htm) function.
The `CRDIDesc` and `CRDODesc` ILEpointers were not being aligned properly along 16 byte boundary.

Instead of just fixing the ILECALL we avoid calling QlgTextDescToDesc altogether by
creating an encoding map. The map contains supported mariadb charset,
iconv to and from converter tables, and Db2 CCSID.

* fixup! fix: Create table with character column issue

* fixup! fixup! fix: Create table with character column issue

* fixup! fixup! fixup! fix: Create table with character column issue

* fixup! fixup! fixup! fixup! fix: Create table with character column issue

* Update db2i_charsetSupport.cc

Co-authored-by: Kevin Adler <[email protected]>

Co-authored-by: Kevin Adler <[email protected]>

Author: abmusse

CMakeLists.txt

@@ -1,52 +1,33 @@
 cmake_minimum_required (VERSION 2.8.0)
 project (ibmdb2i)
-set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-brtl,-lc,-blibpath:/QOpenSys/pkgs/lib:/QOpenSys/usr/lib:/usr/lib,-bbigtoc,-lpthread,-liconv")
-set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-brtl,-lc,-blibpath:/QOpenSys/pkgs/lib:/QOpenSys/usr/lib:/usr/lib,-bbigtoc,-lpthread,-liconv")
-set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-brtl,-lc,-blibpath:/QOpenSys/pkgs/lib:/QOpenSys/usr/lib:/usr/lib,-bbigtoc,-lpthread,-liconv")
-# message("-- ibmdb2i CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS}")
-# message("-- ibmdb2i CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG}")
-# message("-- ibmdb2i CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE}")
 include_directories(BEFORE special/include)
 include_directories (
   ../../include
-  ../../sql 
+  ../../sql
   ../../pcre)
-SET(IBMDB2I_SOURCES db2i_blobCollection.cc
-db2i_misc.cc
-db2i_charsetSupport.cc
-db2i_collationSupport.cc
-db2i_constraints.cc
-db2i_conversion.cc
-db2i_errors.cc
-db2i_file.cc
-db2i_ileBridge.cc
-db2i_ioBuffers.cc
-db2i_myconv.cc
-db2i_rir.cc
-db2i_sqlStatementStream.cc
-db2i_global.cc
-db2i_safeString.cc
-ha_ibmdb2i.cc)
-# LINK_INTERFACE_LIBRARIES
-set(PASELIB_LIBRARIES
-    -L/QOpenSys/usr/lib
-    pthread
-    c
-    iconv)
-# STATIC_ONLY  (MANDATORY) 
-# (MANDATORY)  -- affects sql/sql_builtin.c (gen file on cmake, build-xxx.sh) 
-# -- links ibmdb2i into mysqld (daemon)
-# -- INSTALL SONAME 'ha_ibmdb2i'; (no longer required)
-# MYSQL_ADD_PLUGIN(ibmdb2i ${IBMDB2I_SOURCES} 
-#  STORAGE_ENGINE STATIC_ONLY MANDATORY
-#  LINK_LIBRARIES ${PASELIB_LIBRARIES})
 
-# MODULE_ONLY
-# -- INSTALL SONAME 'ha_ibmdb2i';
-MYSQL_ADD_PLUGIN(ibmdb2i ${IBMDB2I_SOURCES} 
- STORAGE_ENGINE MODULE_ONLY
- LINK_LIBRARIES ${PASELIB_LIBRARIES})
+SET(IBMDB2I_SOURCES
+  db2i_blobCollection.cc
+  db2i_misc.cc
+  db2i_charsetSupport.cc
+  db2i_collationSupport.cc
+  db2i_constraints.cc
+  db2i_conversion.cc
+  db2i_errors.cc
+  db2i_file.cc
+  db2i_ileBridge.cc
+  db2i_ioBuffers.cc
+  db2i_myconv.cc
+  db2i_rir.cc
+  db2i_sqlStatementStream.cc
+  db2i_global.cc
+  db2i_safeString.cc
+  ha_ibmdb2i.cc
+)
 
-# Dave add -malign-power -malign-natural (below)
-# Our power engine will run better. Also fewer gcc odd boundary over runs.
-target_compile_options(ibmdb2i PRIVATE -malign-power -malign-natural -ggdb -O0)
+MYSQL_ADD_PLUGIN(ibmdb2i
+                ${IBMDB2I_SOURCES}
+                STORAGE_ENGINE MODULE_ONLY
+                LINK_LIBRARIES /QOpenSys/usr/lib/libiconv.a)
+
+target_compile_options(ibmdb2i PRIVATE -O0)