Adding an alternative grammar file sql_yacc_ora.yy for sql_mode=ORACLE

- Adding a new grammar file sql_yacc_ora.yy, which is currently
  almost a full copy of sql_yacc.yy.

  Note, it's now assumed that sql_yacc.yy and sql_yacc_ora.yy
  use the same set of %token directives and exactly the same
  %union directive.
  These declarations should eventually be moved into a shared
  included file, to make sure that sql_yacc.h and sql_yacc_ora.h
  are compatible.

- Removing the "-p MYSQL" flag from cmake/bison.cmake, using
  the %name-prefix directive inside sql_yacc.yy and sql_yacc_ora.yy instead

- Adding other CMake related changes to build sql_yacc_ora.o
  form sql_yacc_ora.yy

- Adding NUMBER(M,N) as a synonym to DECIMAL(M,N) as the first
  Oracle compatibility syntax understood in sql_mode=ORACLE.

- Adding prototypes to functions add_virtual_expression()
  and handle_sql2003_note184_exception(), so they can be used
  in both sql_yacc.yy and sql_yacc_ora.yy.

- Adding a new test suite compat/oracle, with the first test "type_number".
  Use this:
   ./mtr compat/oracle.type_number   # to run a single test
   ./mtr --suite=compat/oracle       # to run the entire new suite

- Adding compat/oracle into the list of default suites,
  so BuildBot can run it automatically on pushes.

.gitignore

@@ -161,6 +161,8 @@ sql/mysqld
 sql/sql_builtin.cc
 sql/sql_yacc.cc
 sql/sql_yacc.h
+sql/sql_yacc_ora.cc
+sql/sql_yacc_ora.h
 storage/heap/hp_test1
 storage/heap/hp_test2
 storage/maria/aria_chk

cmake/bison.cmake

@@ -50,7 +50,7 @@ MACRO (RUN_BISON input_yy output_cc output_h)
     ADD_CUSTOM_COMMAND(
       OUTPUT ${output_cc}
              ${output_h}
-      COMMAND ${BISON_EXECUTABLE}  -y -p MYSQL 
+      COMMAND ${BISON_EXECUTABLE}  -y
        --output=${output_cc}
        --defines=${output_h}
         ${input_yy}

libmysqld/CMakeLists.txt

@@ -30,6 +30,8 @@ ${SSL_INTERNAL_INCLUDE_DIRS}
 SET(GEN_SOURCES
 ${CMAKE_BINARY_DIR}/sql/sql_yacc.h 
 ${CMAKE_BINARY_DIR}/sql/sql_yacc.cc
+${CMAKE_BINARY_DIR}/sql/sql_yacc_ora.h
+${CMAKE_BINARY_DIR}/sql/sql_yacc_ora.cc
 ${CMAKE_BINARY_DIR}/sql/lex_hash.h 
 )
 

mysql-test/mysql-test-run.pl

@@ -171,6 +171,7 @@ my @DEFAULT_SUITES= qw(
     binlog-
     binlog_encryption-
     csv-
+    compat/oracle-
     encryption-
     federated-
     funcs_1-

mysql-test/suite/compat/oracle/r/type_number.result

+SET sql_mode=ORACLE;
+CREATE TABLE t1 (a NUMBER(10,2));
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE "t1" (
+  "a" decimal(10,2) DEFAULT NULL
+)
+DROP TABLE t1;

mysql-test/suite/compat/oracle/t/type_number.test

+SET sql_mode=ORACLE;
+CREATE TABLE t1 (a NUMBER(10,2));
+SHOW CREATE TABLE t1;
+DROP TABLE t1;

sql/CMakeLists.txt

@@ -48,6 +48,8 @@ ${WSREP_INCLUDES}
 SET(GEN_SOURCES
 ${CMAKE_CURRENT_BINARY_DIR}/sql_yacc.h 
 ${CMAKE_CURRENT_BINARY_DIR}/sql_yacc.cc
+${CMAKE_CURRENT_BINARY_DIR}/sql_yacc_ora.h
+${CMAKE_CURRENT_BINARY_DIR}/sql_yacc_ora.cc
 ${CMAKE_CURRENT_BINARY_DIR}/lex_hash.h 
 )
 SET(GEN_DIGEST_SOURCES
@@ -279,6 +281,12 @@ RUN_BISON(
   ${CMAKE_CURRENT_BINARY_DIR}/sql_yacc.h
 )
 
+RUN_BISON(
+  ${CMAKE_CURRENT_SOURCE_DIR}/sql_yacc_ora.yy
+  ${CMAKE_CURRENT_BINARY_DIR}/sql_yacc_ora.cc
+  ${CMAKE_CURRENT_BINARY_DIR}/sql_yacc_ora.h
+)
+
 # Gen_lex_hash
 IF(NOT CMAKE_CROSSCOMPILING)
   ADD_EXECUTABLE(gen_lex_hash gen_lex_hash.cc)
@@ -329,6 +337,7 @@ CONFIGURE_FILE(
 ADD_CUSTOM_TARGET(dist 
   COMMAND ${CMAKE_COMMAND} -P ${CMAKE_BINARY_DIR}/make_dist.cmake
   DEPENDS ${CMAKE_BINARY_DIR}/sql/sql_yacc.cc ${CMAKE_BINARY_DIR}/sql/sql_yacc.h
+  DEPENDS ${CMAKE_BINARY_DIR}/sql/sql_yacc_ora.cc ${CMAKE_BINARY_DIR}/sql/sql_yacc_ora.h
   WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
 )
 

sql/sql_lex.cc

@@ -1336,6 +1336,11 @@ int MYSQLlex(YYSTYPE *yylval, THD *thd)
   return token;
 }
 
+int ORAlex(YYSTYPE *yylval, THD *thd)
+{
+  return MYSQLlex(yylval, thd);
+}
+
 static int lex_one_token(YYSTYPE *yylval, THD *thd)
 {
   reg1	uchar UNINIT_VAR(c);

sql/sql_lex.h

@@ -3367,6 +3367,7 @@ extern void lex_end_stage2(LEX *lex);
 void end_lex_with_single_table(THD *thd, TABLE *table, LEX *old_lex);
 int init_lex_with_single_table(THD *thd, TABLE *table, LEX *lex);
 extern int MYSQLlex(union YYSTYPE *yylval, THD *thd);
+extern int ORAlex(union YYSTYPE *yylval, THD *thd);
 
 extern void trim_whitespace(CHARSET_INFO *cs, LEX_STRING *str,
                             uint *prefix_removed);
@@ -3382,5 +3383,8 @@ extern bool is_native_function_with_warn(THD *thd, const LEX_STRING *name);
 void my_missing_function_error(const LEX_STRING &token, const char *name);
 bool is_keyword(const char *name, uint len);
 
+Virtual_column_info *add_virtual_expression(THD *thd, Item *expr);
+Item* handle_sql2003_note184_exception(THD *thd, Item* left, bool equal,
+                                       Item *expr);
 #endif /* MYSQL_SERVER */
 #endif /* SQL_LEX_INCLUDED */

sql/sql_parse.cc

@@ -9849,6 +9849,7 @@ bool check_host_name(LEX_STRING *str)
 
 
 extern int MYSQLparse(THD *thd); // from sql_yacc.cc
+extern int ORAparse(THD *thd);   // from sql_yacc_ora.cc
 
 
 /**
@@ -9908,7 +9909,10 @@ bool parse_sql(THD *thd, Parser_state *parser_state,
 
   /* Parse the query. */
 
-  bool mysql_parse_status= MYSQLparse(thd) != 0;
+  bool mysql_parse_status=
+         ((thd->variables.sql_mode & MODE_ORACLE) ?
+          ORAparse(thd) :
+          MYSQLparse(thd)) != 0;
 
   /*
     Check that if MYSQLparse() failed either thd->is_error() is set, or an

sql/sql_yacc.yy

@@ -993,6 +993,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 %}
 
 %pure-parser                                    /* We have threads */
+%name-prefix "MYSQL"
 %parse-param { THD *thd }
 %lex-param { THD *thd }
 /*