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authorGuilhem Bichot <guilhem@mysql.com>2009-08-07 12:16:00 +0200
committerGuilhem Bichot <guilhem@mysql.com>2009-08-07 12:16:00 +0200
commit7ceb29ff17047a268d8e8670478f6e1669939904 (patch)
tree65b42f5cb11f29ea5b4414ff075ccafd48569ad6 /storage/innobase/include/eval0eval.ic
parent7fa1449eac29401b3d1f3fb4980149e9e562a705 (diff)
downloadmariadb-git-7ceb29ff17047a268d8e8670478f6e1669939904.tar.gz
Renamed storage/innodb_plugin to storage/innobase, so that 1) it's the same
layout as we always had in trees containing only the builtin 2) win\configure.js WITH_INNOBASE_STORAGE_ENGINE still works. storage/innobase/CMakeLists.txt: fix to new directory name (and like 5.1) storage/innobase/Makefile.am: fix to new directory name (and like 5.1) storage/innobase/handler/ha_innodb.cc: fix to new directory name (and like 5.1) storage/innobase/plug.in: fix to new directory name (and like 5.1)
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+/*****************************************************************************
+
+Copyright (c) 1997, 2009, Innobase Oy. All Rights Reserved.
+
+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., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+
+*****************************************************************************/
+
+/**************************************************//**
+@file include/eval0eval.ic
+SQL evaluator: evaluates simple data structures, like expressions, in
+a query graph
+
+Created 12/29/1997 Heikki Tuuri
+*******************************************************/
+
+#include "que0que.h"
+#include "rem0cmp.h"
+#include "pars0grm.h"
+
+/*****************************************************************//**
+Evaluates a function node. */
+UNIV_INTERN
+void
+eval_func(
+/*======*/
+ func_node_t* func_node); /*!< in: function node */
+/*****************************************************************//**
+Allocate a buffer from global dynamic memory for a value of a que_node.
+NOTE that this memory must be explicitly freed when the query graph is
+freed. If the node already has allocated buffer, that buffer is freed
+here. NOTE that this is the only function where dynamic memory should be
+allocated for a query node val field.
+@return pointer to allocated buffer */
+UNIV_INTERN
+byte*
+eval_node_alloc_val_buf(
+/*====================*/
+ que_node_t* node, /*!< in: query graph node; sets the val field
+ data field to point to the new buffer, and
+ len field equal to size */
+ ulint size); /*!< in: buffer size */
+
+
+/*****************************************************************//**
+Allocates a new buffer if needed.
+@return pointer to buffer */
+UNIV_INLINE
+byte*
+eval_node_ensure_val_buf(
+/*=====================*/
+ que_node_t* node, /*!< in: query graph node; sets the val field
+ data field to point to the new buffer, and
+ len field equal to size */
+ ulint size) /*!< in: buffer size */
+{
+ dfield_t* dfield;
+ byte* data;
+
+ dfield = que_node_get_val(node);
+ dfield_set_len(dfield, size);
+
+ data = dfield_get_data(dfield);
+
+ if (!data || que_node_get_val_buf_size(node) < size) {
+
+ data = eval_node_alloc_val_buf(node, size);
+ }
+
+ return(data);
+}
+
+/*****************************************************************//**
+Evaluates a symbol table symbol. */
+UNIV_INLINE
+void
+eval_sym(
+/*=====*/
+ sym_node_t* sym_node) /*!< in: symbol table node */
+{
+
+ ut_ad(que_node_get_type(sym_node) == QUE_NODE_SYMBOL);
+
+ if (sym_node->indirection) {
+ /* The symbol table node is an alias for a variable or a
+ column */
+
+ dfield_copy_data(que_node_get_val(sym_node),
+ que_node_get_val(sym_node->indirection));
+ }
+}
+
+/*****************************************************************//**
+Evaluates an expression. */
+UNIV_INLINE
+void
+eval_exp(
+/*=====*/
+ que_node_t* exp_node) /*!< in: expression */
+{
+ if (que_node_get_type(exp_node) == QUE_NODE_SYMBOL) {
+
+ eval_sym((sym_node_t*)exp_node);
+
+ return;
+ }
+
+ eval_func(exp_node);
+}
+
+/*****************************************************************//**
+Sets an integer value as the value of an expression node. */
+UNIV_INLINE
+void
+eval_node_set_int_val(
+/*==================*/
+ que_node_t* node, /*!< in: expression node */
+ lint val) /*!< in: value to set */
+{
+ dfield_t* dfield;
+ byte* data;
+
+ dfield = que_node_get_val(node);
+
+ data = dfield_get_data(dfield);
+
+ if (data == NULL) {
+ data = eval_node_alloc_val_buf(node, 4);
+ }
+
+ ut_ad(dfield_get_len(dfield) == 4);
+
+ mach_write_to_4(data, (ulint)val);
+}
+
+/*****************************************************************//**
+Gets an integer non-SQL null value from an expression node.
+@return integer value */
+UNIV_INLINE
+lint
+eval_node_get_int_val(
+/*==================*/
+ que_node_t* node) /*!< in: expression node */
+{
+ dfield_t* dfield;
+
+ dfield = que_node_get_val(node);
+
+ ut_ad(dfield_get_len(dfield) == 4);
+
+ return((int)mach_read_from_4(dfield_get_data(dfield)));
+}
+
+/*****************************************************************//**
+Gets a iboolean value from a query node.
+@return iboolean value */
+UNIV_INLINE
+ibool
+eval_node_get_ibool_val(
+/*====================*/
+ que_node_t* node) /*!< in: query graph node */
+{
+ dfield_t* dfield;
+ byte* data;
+
+ dfield = que_node_get_val(node);
+
+ data = dfield_get_data(dfield);
+
+ ut_ad(data != NULL);
+
+ return(mach_read_from_1(data));
+}
+
+/*****************************************************************//**
+Sets a iboolean value as the value of a function node. */
+UNIV_INLINE
+void
+eval_node_set_ibool_val(
+/*====================*/
+ func_node_t* func_node, /*!< in: function node */
+ ibool val) /*!< in: value to set */
+{
+ dfield_t* dfield;
+ byte* data;
+
+ dfield = que_node_get_val(func_node);
+
+ data = dfield_get_data(dfield);
+
+ if (data == NULL) {
+ /* Allocate 1 byte to hold the value */
+
+ data = eval_node_alloc_val_buf(func_node, 1);
+ }
+
+ ut_ad(dfield_get_len(dfield) == 1);
+
+ mach_write_to_1(data, val);
+}
+
+/*****************************************************************//**
+Copies a binary string value as the value of a query graph node. Allocates a
+new buffer if necessary. */
+UNIV_INLINE
+void
+eval_node_copy_and_alloc_val(
+/*=========================*/
+ que_node_t* node, /*!< in: query graph node */
+ const byte* str, /*!< in: binary string */
+ ulint len) /*!< in: string length or UNIV_SQL_NULL */
+{
+ byte* data;
+
+ if (len == UNIV_SQL_NULL) {
+ dfield_set_len(que_node_get_val(node), len);
+
+ return;
+ }
+
+ data = eval_node_ensure_val_buf(node, len);
+
+ ut_memcpy(data, str, len);
+}
+
+/*****************************************************************//**
+Copies a query node value to another node. */
+UNIV_INLINE
+void
+eval_node_copy_val(
+/*===============*/
+ que_node_t* node1, /*!< in: node to copy to */
+ que_node_t* node2) /*!< in: node to copy from */
+{
+ dfield_t* dfield2;
+
+ dfield2 = que_node_get_val(node2);
+
+ eval_node_copy_and_alloc_val(node1, dfield_get_data(dfield2),
+ dfield_get_len(dfield2));
+}