89 lines
3.2 KiB
C
89 lines
3.2 KiB
C
/*****************************************************************************
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Copyright (c) 1997, 2018, Oracle and/or its affiliates. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License, version 2.0, as published by the
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Free Software Foundation.
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This program is also distributed with certain software (including but not
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limited to OpenSSL) that is licensed under separate terms, as designated in a
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particular file or component or in included license documentation. The authors
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of MySQL hereby grant you an additional permission to link the program and
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your derivative works with the separately licensed software that they have
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included with MySQL.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
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for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*****************************************************************************/
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/** @file include/eval0eval.h
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SQL evaluator: evaluates simple data structures, like expressions, in
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a query graph
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Created 12/29/1997 Heikki Tuuri
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*******************************************************/
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#ifndef eval0eval_h
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#define eval0eval_h
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#include "pars0pars.h"
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#include "pars0sym.h"
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#include "que0types.h"
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#include "univ.i"
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/** Free the buffer from global dynamic memory for a value of a que_node,
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if it has been allocated in the above function. The freeing for pushed
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column values is done in sel_col_prefetch_buf_free. */
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void eval_node_free_val_buf(que_node_t *node); /*!< in: query graph node */
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/** Evaluates a symbol table symbol. */
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UNIV_INLINE
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void eval_sym(sym_node_t *sym_node); /*!< in: symbol table node */
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/** Evaluates an expression. */
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UNIV_INLINE
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void eval_exp(que_node_t *exp_node); /*!< in: expression */
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/** Sets an integer value as the value of an expression node.
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@param[in] node expression node
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@param[in] val value to set */
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UNIV_INLINE
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void eval_node_set_int_val(que_node_t *node, lint val);
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/** Gets an integer value from an expression node.
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@return integer value */
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UNIV_INLINE
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lint eval_node_get_int_val(que_node_t *node); /*!< in: expression node */
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/** Copies a binary string value as the value of a query graph node. Allocates
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a new buffer if necessary.
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@param[in] node query graph node
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@param[in] str binary string
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@param[in] len string length or UNIV_SQL_NULL */
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UNIV_INLINE
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void eval_node_copy_and_alloc_val(que_node_t *node, const byte *str, ulint len);
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/** Copies a query node value to another node.
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@param[in] node1 node to copy to
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@param[in] node2 node to copy from */
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UNIV_INLINE
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void eval_node_copy_val(que_node_t *node1, que_node_t *node2);
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/** Gets a iboolean value from a query node.
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@return iboolean value */
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UNIV_INLINE
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ibool eval_node_get_ibool_val(que_node_t *node); /*!< in: query graph node */
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/** Evaluates a comparison node.
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@return the result of the comparison */
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ibool eval_cmp(func_node_t *cmp_node); /*!< in: comparison node */
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#include "eval0eval.ic"
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#endif
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