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Diffstat (limited to 'plugin/type_mysql_timestamp/plugin.cc')
| -rw-r--r-- | plugin/type_mysql_timestamp/plugin.cc | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/plugin/type_mysql_timestamp/plugin.cc b/plugin/type_mysql_timestamp/plugin.cc new file mode 100644 index 00000000..a524c5c0 --- /dev/null +++ b/plugin/type_mysql_timestamp/plugin.cc @@ -0,0 +1,172 @@ +/* + Copyright (c) 2023, 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 02110-1301 USA */ + +#include <my_global.h> +#include <sql_class.h> +#include <mysql/plugin_data_type.h> +#include "sql_type.h" + + +class Type_collection_local: public Type_collection +{ +protected: + const Type_handler *aggregate_common(const Type_handler *h1, + const Type_handler *h2) const; +public: + const Type_handler *aggregate_for_result(const Type_handler *h1, + const Type_handler *h2) + const override + { + return aggregate_common(h1, h2); + } + + const Type_handler *aggregate_for_comparison(const Type_handler *h1, + const Type_handler *h2) + const override + { + return aggregate_common(h1, h2); + } + + const Type_handler *aggregate_for_min_max(const Type_handler *h1, + const Type_handler *h2) + const override + { + return aggregate_common(h1, h2); + } + + const Type_handler *aggregate_for_num_op(const Type_handler *h1, + const Type_handler *h2) + const override + { + return aggregate_common(h1, h2); + } +}; + + +static Type_collection_local type_collection_local; + + +/* + A more MySQL compatible Field: + it does not set the UNSIGNED_FLAG. + This is how MySQL's Field_timestampf works. +*/ +class Field_mysql_timestampf :public Field_timestampf +{ +public: + Field_mysql_timestampf(const LEX_CSTRING &name, + const Record_addr &addr, + enum utype unireg_check_arg, + TABLE_SHARE *share, decimal_digits_t dec_arg) + :Field_timestampf(addr.ptr(), addr.null_ptr(), addr.null_bit(), + unireg_check_arg, &name, share, dec_arg) + { + flags&= ~UNSIGNED_FLAG; // MySQL compatibility + } + void sql_type(String &str) const override + { + sql_type_opt_dec_comment(str, + Field_mysql_timestampf::type_handler()->name(), + dec, type_version_mysql56()); + } + const Type_handler *type_handler() const override; +}; + + +class Type_handler_mysql_timestamp2: public Type_handler_timestamp2 +{ +public: + const Type_collection *type_collection() const override + { + return &type_collection_local; + } + Field *make_table_field_from_def(TABLE_SHARE *share, MEM_ROOT *root, + const LEX_CSTRING *name, + const Record_addr &rec, const Bit_addr &bit, + const Column_definition_attributes *attr, + uint32 flags) const override + { + return new (root) + Field_mysql_timestampf(*name, rec, attr->unireg_check, share, + attr->temporal_dec(MAX_DATETIME_WIDTH)); + } + void Column_definition_implicit_upgrade(Column_definition *c) const override + { + /* + Suppress the automatic upgrade depending on opt_mysql56_temporal_format, + derived from Type_handler_timestamp_common. + */ + } +}; + + +static Type_handler_mysql_timestamp2 type_handler_mysql_timestamp2; + + +const Type_handler *Field_mysql_timestampf::type_handler() const +{ + return &type_handler_mysql_timestamp2; +} + + +const Type_handler * +Type_collection_local::aggregate_common(const Type_handler *h1, + const Type_handler *h2) const +{ + if (h1 == h2) + return h1; + + static const Type_aggregator::Pair agg[]= + { + { + &type_handler_timestamp2, + &type_handler_mysql_timestamp2, + &type_handler_mysql_timestamp2 + }, + {NULL,NULL,NULL} + }; + + return Type_aggregator::find_handler_in_array(agg, h1, h2, true); +} + + +static struct st_mariadb_data_type plugin_descriptor_type_mysql_timestamp= +{ + MariaDB_DATA_TYPE_INTERFACE_VERSION, + &type_handler_mysql_timestamp2 +}; + + + +/*************************************************************************/ + +maria_declare_plugin(type_mysql_timestamp) +{ + MariaDB_DATA_TYPE_PLUGIN, // the plugin type (see include/mysql/plugin.h) + &plugin_descriptor_type_mysql_timestamp, // pointer to type-specific plugin descriptor + "type_mysql_timestamp", // plugin name + "MariaDB Corporation", // plugin author + "Data type TYPE_MYSQL_TIMESTAMP", // the plugin description + PLUGIN_LICENSE_GPL, // the plugin license (see include/mysql/plugin.h) + 0, // Pointer to plugin initialization function + 0, // Pointer to plugin deinitialization function + 0x0100, // Numeric version 0xAABB means AA.BB version + NULL, // Status variables + NULL, // System variables + "1.0", // String version representation + MariaDB_PLUGIN_MATURITY_EXPERIMENTAL // Maturity(see include/mysql/plugin.h)*/ +} +maria_declare_plugin_end; |