1 files changed, 141 insertions, 0 deletions
diff --git a/sql/sql_schema.cc b/sql/sql_schema.cc
new file mode 100644
index 00000000..f08204d2
--- /dev/null
+++ b/sql/sql_schema.cc
@@ -0,0 +1,141 @@
+/*
+ Copyright (c) 2020, MariaDB Corporation.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2 of the License.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+#include "mariadb.h"
+#include "sql_type.h"
+#include "sql_schema.h"
+#include "sql_class.h"
+
+class Schema_oracle: public Schema
+{
+public:
+  Schema_oracle(const LEX_CSTRING &name)
+   :Schema(name)
+  { }
+  const Type_handler *map_data_type(THD *thd, const Type_handler *src)
+                                    const
+  {
+    if (src == &type_handler_newdate)
+      return thd->type_handler_for_datetime();
+    return src;
+  }
+
+  Item *make_item_func_replace(THD *thd,
+                               Item *subj,
+                               Item *find,
+                               Item *replace) const;
+  Item *make_item_func_substr(THD *thd,
+                              const Lex_substring_spec_st &spec) const;
+  Item *make_item_func_trim(THD *thd, const Lex_trim_st &spec) const;
+};
+
+
+class Schema_maxdb: public Schema
+{
+public:
+  Schema_maxdb(const LEX_CSTRING &name)
+   :Schema(name)
+  { }
+  const Type_handler *map_data_type(THD *thd, const Type_handler *src)
+                                    const
+  {
+    if (src == &type_handler_timestamp ||
+        src == &type_handler_timestamp2)
+      return thd->type_handler_for_datetime();
+    return src;
+  }
+};
+
+
+Schema        mariadb_schema(Lex_cstring(STRING_WITH_LEN("mariadb_schema")));
+Schema_oracle oracle_schema(Lex_cstring(STRING_WITH_LEN("oracle_schema")));
+Schema_maxdb  maxdb_schema(Lex_cstring(STRING_WITH_LEN("maxdb_schema")));
+
+
+Schema *Schema::find_by_name(const LEX_CSTRING &name)
+{
+  DBUG_ASSERT(name.str);
+  if (mariadb_schema.eq_name(name))
+    return &mariadb_schema;
+  if (oracle_schema.eq_name(name))
+    return &oracle_schema;
+  if (maxdb_schema.eq_name(name))
+    return &maxdb_schema;
+  return NULL;
+}
+
+
+Schema *Schema::find_implied(THD *thd)
+{
+  if (thd->variables.sql_mode & MODE_ORACLE)
+    return &oracle_schema;
+  if (thd->variables.sql_mode & MODE_MAXDB)
+    return &maxdb_schema;
+  return &mariadb_schema;
+}
+
+
+Item *Schema::make_item_func_replace(THD *thd,
+                                     Item *subj,
+                                     Item *find,
+                                     Item *replace) const
+{
+  return new (thd->mem_root) Item_func_replace(thd, subj, find, replace);
+}
+
+
+Item *Schema::make_item_func_substr(THD *thd,
+                                    const Lex_substring_spec_st &spec) const
+{
+  return spec.m_for ?
+    new (thd->mem_root) Item_func_substr(thd, spec.m_subject, spec.m_from,
+                                              spec.m_for) :
+    new (thd->mem_root) Item_func_substr(thd, spec.m_subject, spec.m_from);
+}
+
+
+Item *Schema::make_item_func_trim(THD *thd, const Lex_trim_st &spec) const
+{
+  return spec.make_item_func_trim_std(thd);
+}
+
+
+Item *Schema_oracle::make_item_func_replace(THD *thd,
+                                            Item *subj,
+                                            Item *find,
+                                            Item *replace) const
+{
+  return new (thd->mem_root) Item_func_replace_oracle(thd, subj, find, replace);
+}
+
+
+Item *Schema_oracle::make_item_func_substr(THD *thd,
+                                    const Lex_substring_spec_st &spec) const
+{
+  return spec.m_for ?
+    new (thd->mem_root) Item_func_substr_oracle(thd, spec.m_subject,
+                                                     spec.m_from,
+                                                     spec.m_for) :
+    new (thd->mem_root) Item_func_substr_oracle(thd, spec.m_subject,
+                                                     spec.m_from);
+}
+
+
+Item *Schema_oracle::make_item_func_trim(THD *thd,
+                                         const Lex_trim_st &spec) const
+{
+  return spec.make_item_func_trim_oracle(thd);
+}