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109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/*****************************************************************************
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Copyright (c) 1997, 2016, 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 as published by the Free Software
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Foundation; version 2 of the License.
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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 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 Street, Fifth Floor, Boston, MA 02110-1335 USA
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*****************************************************************************/
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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 "que0types.h"
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#include "pars0sym.h"
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#include "pars0pars.h"
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/*****************************************************************//**
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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
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eval_node_free_val_buf(
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/*===================*/
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que_node_t* node); /*!< in: query graph node */
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/*****************************************************************//**
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Evaluates a symbol table symbol. */
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UNIV_INLINE
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void
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eval_sym(
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/*=====*/
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sym_node_t* sym_node); /*!< in: symbol table node */
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/*****************************************************************//**
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Evaluates an expression. */
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UNIV_INLINE
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void
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eval_exp(
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/*=====*/
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que_node_t* exp_node); /*!< in: expression */
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/*****************************************************************//**
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Sets an integer value as the value of an expression node. */
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UNIV_INLINE
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void
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eval_node_set_int_val(
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/*==================*/
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que_node_t* node, /*!< in: expression node */
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lint val); /*!< in: value to set */
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/*****************************************************************//**
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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
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eval_node_get_int_val(
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/*==================*/
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que_node_t* node); /*!< in: expression node */
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/*****************************************************************//**
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Copies a binary string value as the value of a query graph node. Allocates a
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new buffer if necessary. */
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UNIV_INLINE
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void
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eval_node_copy_and_alloc_val(
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/*=========================*/
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que_node_t* node, /*!< in: query graph node */
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const byte* str, /*!< in: binary string */
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ulint len); /*!< in: string length or UNIV_SQL_NULL */
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/*****************************************************************//**
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Copies a query node value to another node. */
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UNIV_INLINE
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void
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eval_node_copy_val(
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/*===============*/
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que_node_t* node1, /*!< in: node to copy to */
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que_node_t* node2); /*!< in: node to copy from */
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/*****************************************************************//**
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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
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eval_node_get_ibool_val(
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/*====================*/
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que_node_t* node); /*!< in: query graph node */
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/*****************************************************************//**
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Evaluates a comparison node.
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@return the result of the comparison */
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ibool
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eval_cmp(
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/*=====*/
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func_node_t* cmp_node); /*!< in: comparison node */
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#include "eval0eval.inl"
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#endif
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