📄 swq_8h-source.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>OGR: swq.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.5.1 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li id="current"><a href="files.html"><span>Files</span></a></li> <li><a href="dirs.html"><span>Directories</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>File Members</span></a></li> </ul></div><h1>swq.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/******************************************************************************</span><a name="l00002"></a>00002 <span class="comment"> *</span><a name="l00003"></a>00003 <span class="comment"> * Component: OGDI Driver Support Library</span><a name="l00004"></a>00004 <span class="comment"> * Purpose: Generic SQL WHERE Expression Evaluator Declarations.</span><a name="l00005"></a>00005 <span class="comment"> * Author: Frank Warmerdam <warmerdam@pobox.com></span><a name="l00006"></a>00006 <span class="comment"> * </span><a name="l00007"></a>00007 <span class="comment"> ******************************************************************************</span><a name="l00008"></a>00008 <span class="comment"> * Copyright (C) 2001 Information Interoperability Institute (3i)</span><a name="l00009"></a>00009 <span class="comment"> * Permission to use, copy, modify and distribute this software and</span><a name="l00010"></a>00010 <span class="comment"> * its documentation for any purpose and without fee is hereby granted,</span><a name="l00011"></a>00011 <span class="comment"> * provided that the above copyright notice appear in all copies, that</span><a name="l00012"></a>00012 <span class="comment"> * both the copyright notice and this permission notice appear in</span><a name="l00013"></a>00013 <span class="comment"> * supporting documentation, and that the name of 3i not be used </span><a name="l00014"></a>00014 <span class="comment"> * in advertising or publicity pertaining to distribution of the software </span><a name="l00015"></a>00015 <span class="comment"> * without specific, written prior permission. 3i makes no</span><a name="l00016"></a>00016 <span class="comment"> * representations about the suitability of this software for any purpose.</span><a name="l00017"></a>00017 <span class="comment"> * It is provided "as is" without express or implied warranty.</span><a name="l00018"></a>00018 <span class="comment"> ****************************************************************************/</span><a name="l00019"></a>00019 <a name="l00020"></a>00020 <span class="preprocessor">#ifndef _SWQ_H_INCLUDED_</span><a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#define _SWQ_H_INCLUDED_</span><a name="l00022"></a>00022 <span class="preprocessor"></span><a name="l00023"></a>00023 <span class="keyword">typedef</span> <span class="keyword">enum</span> {<a name="l00024"></a>00024 SWQ_OR,<a name="l00025"></a>00025 SWQ_AND,<a name="l00026"></a>00026 SWQ_NOT,<a name="l00027"></a>00027 SWQ_EQ,<a name="l00028"></a>00028 SWQ_NE,<a name="l00029"></a>00029 SWQ_GE,<a name="l00030"></a>00030 SWQ_LE,<a name="l00031"></a>00031 SWQ_LT,<a name="l00032"></a>00032 SWQ_GT,<a name="l00033"></a>00033 SWQ_LIKE,<a name="l00034"></a>00034 SWQ_NOTLIKE,<a name="l00035"></a>00035 SWQ_ISNULL,<a name="l00036"></a>00036 SWQ_ISNOTNULL,<a name="l00037"></a>00037 SWQ_IN,<a name="l00038"></a>00038 SWQ_NOTIN,<a name="l00039"></a>00039 SWQ_UNKNOWN<a name="l00040"></a>00040 } swq_op;<a name="l00041"></a>00041 <a name="l00042"></a>00042 <span class="keyword">typedef</span> <span class="keyword">enum</span> {<a name="l00043"></a>00043 SWQ_INTEGER,<a name="l00044"></a>00044 SWQ_FLOAT,<a name="l00045"></a>00045 SWQ_STRING, <a name="l00046"></a>00046 SWQ_BOOLEAN,<a name="l00047"></a>00047 SWQ_OTHER<a name="l00048"></a>00048 } swq_field_type;<a name="l00049"></a>00049 <a name="l00050"></a>00050 <span class="keyword">typedef</span> <span class="keyword">struct </span>{<a name="l00051"></a>00051 swq_op operation;<a name="l00052"></a>00052 <a name="l00053"></a>00053 <span class="comment">/* only for logical expression on subexpression */</span><a name="l00054"></a>00054 <span class="keyword">struct </span>swq_node_s *first_sub_expr;<a name="l00055"></a>00055 <span class="keyword">struct </span>swq_node_s *second_sub_expr;<a name="l00056"></a>00056 <a name="l00057"></a>00057 <span class="comment">/* only for binary field operations */</span><a name="l00058"></a>00058 <span class="keywordtype">int</span> field_index;<a name="l00059"></a>00059 <span class="keywordtype">int</span> table_index;<a name="l00060"></a>00060 swq_field_type field_type;<a name="l00061"></a>00061 <span class="keywordtype">char</span> *string_value;<a name="l00062"></a>00062 <span class="keywordtype">int</span> int_value;<a name="l00063"></a>00063 <span class="keywordtype">double</span> float_value;<a name="l00064"></a>00064 } swq_field_op;<a name="l00065"></a>00065 <a name="l00066"></a>00066 <span class="keyword">typedef</span> swq_field_op swq_expr;<a name="l00067"></a>00067 <a name="l00068"></a>00068 <span class="keyword">typedef</span> int (*swq_op_evaluator)(swq_field_op *op, <span class="keywordtype">void</span> *record_handle);<a name="l00069"></a>00069 <a name="l00070"></a>00070 <span class="keyword">typedef</span> <span class="keyword">struct </span>{<a name="l00071"></a>00071 <span class="keywordtype">char</span> *data_source;<a name="l00072"></a>00072 <span class="keywordtype">char</span> *table_name;<a name="l00073"></a>00073 <span class="keywordtype">char</span> *table_alias;<a name="l00074"></a>00074 } swq_table_def;<a name="l00075"></a>00075 <a name="l00076"></a>00076 <span class="keyword">typedef</span> <span class="keyword">struct </span>{<a name="l00077"></a>00077 <span class="keywordtype">int</span> count;<a name="l00078"></a>00078 <span class="keywordtype">char</span> **names;<a name="l00079"></a>00079 swq_field_type *types;<a name="l00080"></a>00080 <span class="keywordtype">int</span> *table_ids;<a name="l00081"></a>00081 <span class="keywordtype">int</span> *ids;<a name="l00082"></a>00082 <a name="l00083"></a>00083 <span class="keywordtype">int</span> table_count;<a name="l00084"></a>00084 swq_table_def *table_defs;<a name="l00085"></a>00085 } swq_field_list;<a name="l00086"></a>00086 <a name="l00087"></a>00087 <span class="comment">/* Compile an SQL WHERE clause into an internal form. The field_list is</span><a name="l00088"></a>00088 <span class="comment">** the list of fields in the target 'table', used to render where into </span><a name="l00089"></a>00089 <span class="comment">** field numbers instead of names. </span><a name="l00090"></a>00090 <span class="comment">*/</span><a name="l00091"></a>00091 <span class="keyword">const</span> <span class="keywordtype">char</span> *swq_expr_compile( <span class="keyword">const</span> <span class="keywordtype">char</span> *where_clause, <a name="l00092"></a>00092 <span class="keywordtype">int</span> field_count,<a name="l00093"></a>00093 <span class="keywordtype">char</span> **field_list,<a name="l00094"></a>00094 swq_field_type *field_types,<a name="l00095"></a>00095 swq_expr **expr );<a name="l00096"></a>00096 <a name="l00097"></a>00097 <span class="keyword">const</span> <span class="keywordtype">char</span> *swq_expr_compile2( <span class="keyword">const</span> <span class="keywordtype">char</span> *where_clause, <a name="l00098"></a>00098 swq_field_list *field_list, <a name="l00099"></a>00099 swq_expr **expr );⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -