view_transform.h

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/*
 * Copyright 2008 Search Solution Corporation
 * Copyright 2016 CUBRID Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */


/*
 * view_transform.h - view (virtual class) transformation
 */

#ifndef _VIEW_TRANSFORM_H_
#define _VIEW_TRANSFORM_H_

#ident "$Id$"

#include "parser.h"
#include "schema_manager.h"

typedef enum PT_FETCH_AS
{ PT_NORMAL_SELECT, PT_INVERTED_ASSIGNMENTS, PT_PARTIAL_SELECT }
PT_FETCH_AS;

enum pt_updatability
{
  PT_NOT_UPDATABLE = 0x0,   /* non-updatable query */
  PT_PARTIALLY_UPDATABLE = 0x1, /* partially updatable query (i.e. vclass whose definition contains joins, but is
                 * otherwise updatable) */
  PT_UPDATABLE = 0x3        /* fully updatable query */
};
typedef enum pt_updatability PT_UPDATABILITY;

extern PT_NODE *mq_bump_correlation_level (PARSER_CONTEXT * parser, PT_NODE * node, int increment, int match);

extern PT_UPDATABILITY mq_updatable (PARSER_CONTEXT * parser, PT_NODE * statement);

extern PT_NODE *mq_translate (PARSER_CONTEXT * parser, PT_NODE * volatile node);

extern PT_NODE *mq_make_derived_spec (PARSER_CONTEXT * parser, PT_NODE * node, PT_NODE * subquery, int *idx,
                      PT_NODE ** spec_ptr, PT_NODE ** attr_list_ptr);
extern PT_NODE *mq_oid (PARSER_CONTEXT * parser, PT_NODE * spec);

extern PT_NODE *mq_get_references (PARSER_CONTEXT * parser, PT_NODE * statement, PT_NODE * spec);
extern PT_NODE *mq_get_references_helper (PARSER_CONTEXT * parser, PT_NODE * statement, PT_NODE * spec,
                      bool get_spec_referenced_attr);
extern PT_NODE *mq_reset_paths (PARSER_CONTEXT * parser, PT_NODE * statement, PT_NODE * root_spec);
extern PT_NODE *mq_reset_ids (PARSER_CONTEXT * parser, PT_NODE * statement, PT_NODE * spec);
extern PT_NODE *mq_clear_ids (PARSER_CONTEXT * parser, PT_NODE * node, PT_NODE * spec);

extern PT_NODE *mq_set_references (PARSER_CONTEXT * parser, PT_NODE * statement, PT_NODE * spec);

extern bool mq_is_outer_join_spec (PARSER_CONTEXT * parser, PT_NODE * spec);

extern bool mq_is_updatable (DB_OBJECT * vclass_object);
extern bool mq_is_updatable_strict (DB_OBJECT * vclass_object);

extern bool mq_is_updatable_attribute (DB_OBJECT * vclass, const char *attr_name, DB_OBJECT * base_class);

extern bool mq_is_updatable_att (PARSER_CONTEXT * parser, DB_OBJECT * vmop, const char *attr_name, DB_OBJECT * rmop);

extern int mq_get_attribute (DB_OBJECT * vclass, const char *attr_name, DB_OBJECT * base_class,
                 DB_VALUE * virtual_value, DB_OBJECT * base_instance);

extern int mq_update_attribute (DB_OBJECT * vclass, const char *attr_name, DB_OBJECT * base_class,
                DB_VALUE * virtual_value, DB_VALUE * base_value, const char **base_name, int db_auth);

extern DB_OBJECT *mq_fetch_one_real_class (DB_OBJECT * vclass);


extern int mq_evaluate_expression (PARSER_CONTEXT * parser, PT_NODE * expr, DB_VALUE * value, DB_OBJECT * object,
                   UINTPTR spec_id);

extern int mq_evaluate_expression_having_serial (PARSER_CONTEXT * parser, PT_NODE * expr, DB_VALUE * values,
                         int values_count, DB_OBJECT * object, UINTPTR spec_id);

extern int mq_evaluate_check_option (PARSER_CONTEXT * parser, PT_NODE * expr, DB_OBJECT * object, PT_NODE * view_class);

extern int mq_get_expression (DB_OBJECT * object, const char *expr, DB_VALUE * value);

extern PT_NODE *mq_reset_ids_in_statement (PARSER_CONTEXT * parser, PT_NODE * statement);

extern PT_NODE *mq_reset_ids_in_methods (PARSER_CONTEXT * parser, PT_NODE * statement);

extern PT_NODE *mq_rewrite_aggregate_as_derived (PARSER_CONTEXT * parser, PT_NODE * agg_sel);

extern PT_NODE *mq_rewrite_query_as_derived (PARSER_CONTEXT * parser, PT_NODE * query);
#endif /* _VIEW_TRANSFORM_H_ */