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<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_DATE,
<a name="l00048"></a>00048 SWQ_TIME,
<a name="l00049"></a>00049 SWQ_TIMESTAMP,
<a name="l00050"></a>00050 SWQ_OTHER
<a name="l00051"></a>00051 } swq_field_type;
<a name="l00052"></a>00052
<a name="l00053"></a><a class="code" href="structswq__field__op.html">00053</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00054"></a>00054 swq_op operation;
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="comment">/* only for logical expression on subexpression */</span>
<a name="l00057"></a>00057 <span class="keyword">struct </span>swq_node_s *first_sub_expr;
<a name="l00058"></a>00058 <span class="keyword">struct </span>swq_node_s *second_sub_expr;
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="comment">/* only for binary field operations */</span>
<a name="l00061"></a>00061 <span class="keywordtype">int</span> field_index;
<a name="l00062"></a>00062 <span class="keywordtype">int</span> table_index;
<a name="l00063"></a>00063 swq_field_type field_type;
<a name="l00064"></a>00064 <span class="keywordtype">char</span> *string_value;
<a name="l00065"></a>00065 <span class="keywordtype">int</span> int_value;
<a name="l00066"></a>00066 <span class="keywordtype">double</span> float_value;
<a name="l00067"></a>00067 } <a class="code" href="structswq__field__op.html">swq_field_op</a>;
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="keyword">typedef</span> <a class="code" href="structswq__field__op.html">swq_field_op</a> <a class="code" href="structswq__field__op.html">swq_expr</a>;
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="keyword">typedef</span> int (*swq_op_evaluator)(<a class="code" href="structswq__field__op.html">swq_field_op</a> *op, <span class="keywordtype">void</span> *record_handle);
<a name="l00072"></a>00072
<a name="l00073"></a><a class="code" href="structswq__table__def.html">00073</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00074"></a>00074 <span class="keywordtype">char</span> *data_source;
<a name="l00075"></a>00075 <span class="keywordtype">char</span> *table_name;
<a name="l00076"></a>00076 <span class="keywordtype">char</span> *table_alias;
<a name="l00077"></a>00077 } <a class="code" href="structswq__table__def.html">swq_table_def</a>;
<a name="l00078"></a>00078
<a name="l00079"></a><a class="code" href="structswq__field__list.html">00079</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00080"></a>00080 <span class="keywordtype">int</span> count;
<a name="l00081"></a>00081 <span class="keywordtype">char</span> **names;
<a name="l00082"></a>00082 swq_field_type *types;
<a name="l00083"></a>00083 <span class="keywordtype">int</span> *table_ids;
<a name="l00084"></a>00084 <span class="keywordtype">int</span> *ids;
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="keywordtype">int</span> table_count;
<a name="l00087"></a>00087 <a class="code" href="structswq__table__def.html">swq_table_def</a> *table_defs;
<a name="l00088"></a>00088 } <a class="code" href="structswq__field__list.html">swq_field_list</a>;
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="comment">/* Compile an SQL WHERE clause into an internal form. The field_list is</span>
<a name="l00091"></a>00091 <span class="comment">** the list of fields in the target 'table', used to render where into </span>
<a name="l00092"></a>00092 <span class="comment">** field numbers instead of names. </span>
<a name="l00093"></a>00093 <span class="comment">*/</span>
<a name="l00094"></a>00094 <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="l00095"></a>00095 <span class="keywordtype">int</span> field_count,
<a name="l00096"></a>00096 <span class="keywordtype">char</span> **field_list,
<a name="l00097"></a>00097 swq_field_type *field_types,
<a name="l00098"></a>00098 <a class="code" href="structswq__field__op.html">swq_expr</a> **expr );
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <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="l00101"></a>00101 <a class="code" href="structswq__field__list.html">swq_field_list</a> *field_list,
<a name="l00102"></a>00102 <a class="code" href="structswq__field__op.html">swq_expr</a> **expr );
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="comment">/*</span>
<a name="l00105"></a>00105 <span class="comment">** Evaluate an expression for a particular record using an application</span>
<a name="l00106"></a>00106 <span class="comment">** provided field operation evaluator, and abstract record handle. </span>
<a name="l00107"></a>00107 <span class="comment">*/</span>
<a name="l00108"></a>00108 <span class="keywordtype">int</span> swq_expr_evaluate( <a class="code" href="structswq__field__op.html">swq_expr</a> *expr, swq_op_evaluator fn_evaluator,
<a name="l00109"></a>00109 <span class="keywordtype">void</span> *record_handle );
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="keywordtype">void</span> swq_expr_free( <a class="code" href="structswq__field__op.html">swq_expr</a> * );
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keywordtype">int</span> swq_test_like( <span class="keyword">const</span> <span class="keywordtype">char</span> *input, <span class="keyword">const</span> <span class="keywordtype">char</span> *pattern );
<a name="l00114"></a>00114
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="comment">/****************************************************************************/</span>
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="preprocessor">#define SWQP_ALLOW_UNDEFINED_COL_FUNCS 0x01</span>
<a name="l00119"></a>00119 <span class="preprocessor"></span>
<a name="l00120"></a>00120 <span class="preprocessor">#define SWQM_SUMMARY_RECORD 1</span>
<a name="l00121"></a>00121 <span class="preprocessor"></span><span class="preprocessor">#define SWQM_RECORDSET 2</span>
<a name="l00122"></a>00122 <span class="preprocessor"></span><span class="preprocessor">#define SWQM_DISTINCT_LIST 3</span>
<a name="l00123"></a>00123 <span class="preprocessor"></span>
<a name="l00124"></a>00124 <span class="keyword">typedef</span> <span class="keyword">enum</span> {
<a name="l00125"></a>00125 SWQCF_NONE,
<a name="l00126"></a>00126 SWQCF_AVG,
<a name="l00127"></a>00127 SWQCF_MIN,
<a name="l00128"></a>00128 SWQCF_MAX,
<a name="l00129"></a>00129 SWQCF_COUNT,
<a name="l00130"></a>00130 SWQCF_SUM,
<a name="l00131"></a>00131 SWQCF_CUSTOM
<a name="l00132"></a>00132 } swq_col_func;
<a name="l00133"></a>00133
<a name="l00134"></a><a class="code" href="structswq__col__def.html">00134</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00135"></a>00135 swq_col_func col_func;
<a name="l00136"></a>00136 <span class="keywordtype">char</span> *col_func_name;
<a name="l00137"></a>00137 <span class="keywordtype">char</span> *field_name;
<a name="l00138"></a>00138 <span class="keywordtype">char</span> *field_alias;
<a name="l00139"></a>00139 <span class="keywordtype">int</span> table_index;
<a name="l00140"></a>00140 <span class="keywordtype">int</span> field_index;
<a name="l00141"></a>00141 swq_field_type field_type;
<a name="l00142"></a>00142 swq_field_type target_type;
<a name="l00143"></a>00143 <span class="keywordtype">int</span> field_length;
<a name="l00144"></a>00144 <span class="keywordtype">int</span> field_precision;
<a name="l00145"></a>00145 <span class="keywordtype">int</span> distinct_flag;
<a name="l00146"></a>00146 } <a class="code" href="structswq__col__def.html">swq_col_def</a>;
<a name="l00147"></a>00147
<a name="l00148"></a><a class="code" href="structswq__summary.html">00148</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00149"></a>00149 <span class="keywordtype">int</span> count;
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="keywordtype">char</span> **distinct_list;
<a name="l00152"></a>00152 <span class="keywordtype">double</span> sum;
<a name="l00153"></a>00153 <span class="keywordtype">double</span> min;
<a name="l00154"></a>00154 <span class="keywordtype">double</span> max;
<a name="l00155"></a>00155 } <a class="code" href="structswq__summary.html">swq_summary</a>;
<a name="l00156"></a>00156
<a name="l00157"></a><a class="code" href="structswq__order__def.html">00157</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00158"></a>00158 <span class="keywordtype">char</span> *field_name;
<a name="l00159"></a>00159 <span class="keywordtype">int</span> table_index;
<a name="l00160"></a>00160 <span class="keywordtype">int</span> field_index;
<a name="l00161"></a>00161 <span class="keywordtype">int</span> ascending_flag;
<a name="l00162"></a>00162 } <a class="code" href="structswq__order__def.html">swq_order_def</a>;
<a name="l00163"></a>00163
<a name="l00164"></a><a class="code" href="structswq__join__def.html">00164</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00165"></a>00165 <span class="keywordtype">int</span> secondary_table;
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="keywordtype">char</span> *primary_field_name;
<a name="l00168"></a>00168 <span class="keywordtype">int</span> primary_field;
<a name="l00169"></a>00169
<a name="l00170"></a>00170 swq_op op;
<a name="l00171"></a>00171
<a name="l00172"></a>00172 <span class="keywordtype">char</span> *secondary_field_name;
<a name="l00173"></a>00173 <span class="keywordtype">int</span> secondary_field;
<a name="l00174"></a>00174 } <a class="code" href="structswq__join__def.html">swq_join_def</a>;
<a name="l00175"></a>00175
<a name="l00176"></a><a class="code" href="structswq__select.html">00176</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00177"></a>00177 <span class="keywordtype">int</span> query_mode;
<a name="l00178"></a>00178
<a name="l00179"></a>00179 <span class="keywordtype">char</span> *raw_select;
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="keywordtype">int</span> result_columns;
<a name="l00182"></a>00182 <a class="code" href="structswq__col__def.html">swq_col_def</a> *column_defs;
<a name="l00183"></a>00183 <a class="code" href="structswq__summary.html">swq_summary</a> *column_summary;
<a name="l00184"></a>00184
<a name="l00185"></a>00185 <span class="keywordtype">int</span> table_count;
<a name="l00186"></a>00186 <a class="code" href="structswq__table__def.html">swq_table_def</a> *table_defs;
<a name="l00187"></a>00187
<a name="l00188"></a>00188 <span class="keywordtype">int</span> join_count;
<a name="l00189"></a>00189 <a class="code" href="structswq__join__def.html">swq_join_def</a> *join_defs;
<a name="l00190"></a>00190
<a name="l00191"></a>00191 <span class="keywordtype">char</span> *whole_where_clause;
<a name="l00192"></a>00192 <a class="code" href="structswq__field__op.html">swq_expr</a> *where_expr;
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <span class="keywordtype">int</span> order_specs;
<a name="l00195"></a>00195 <a class="code" href="structswq__order__def.html">swq_order_def</a> *order_defs;
<a name="l00196"></a>00196 } <a class="code" href="structswq__select.html">swq_select</a>;
<a name="l00197"></a>00197
<a name="l00198"></a>00198 <span class="keyword">const</span> <span class="keywordtype">char</span> *swq_select_preparse( <span class="keyword">const</span> <span class="keywordtype">char</span> *select_statement,
<a name="l00199"></a>00199 <a class="code" href="structswq__select.html">swq_select</a> **select_info );
<a name="l00200"></a>00200 <span class="keyword">const</span> <span class="keywordtype">char</span> *swq_select_expand_wildcard( <a class="code" href="structswq__select.html">swq_select</a> *select_info,
<a name="l00201"></a>00201 <a class="code" href="structswq__field__list.html">swq_field_list</a> *field_list );
<a name="l00202"></a>00202 <span class="keyword">const</span> <span class="keywordtype">char</span> *swq_select_parse( <a class="code" href="structswq__select.html">swq_select</a> *select_info,
<a name="l00203"></a>00203 <a class="code" href="structswq__field__list.html">swq_field_list</a> *field_list,
<a name="l00204"></a>00204 <span class="keywordtype">int</span> parse_flags );
<a name="l00205"></a>00205 <span class="keywordtype">void</span> swq_select_free( <a class="code" href="structswq__select.html">swq_select</a> *select_info );
<a name="l00206"></a>00206
<a name="l00207"></a>00207 <span class="keyword">const</span> <span class="keywordtype">char</span> *swq_reform_command( <a class="code" href="structswq__select.html">swq_select</a> *select_info );
<a name="l00208"></a>00208 <span class="keywordtype">void</span> swq_free( <span class="keywordtype">void</span> * );
<a name="l00209"></a>00209 <span class="keywordtype">void</span> *swq_malloc( <span class="keywordtype">int</span> );
<a name="l00210"></a>00210
<a name="l00211"></a>00211 <span class="keyword">const</span> <span class="keywordtype">char</span> *swq_select_finish_summarize( <a class="code" href="structswq__select.html">swq_select</a> *select_info );
<a name="l00212"></a>00212 <span class="keyword">const</span> <span class="keywordtype">char</span> *swq_select_summarize( <a class="code" href="structswq__select.html">swq_select</a> *select_info,
<a name="l00213"></a>00213 <span class="keywordtype">int</span> dest_column,
<a name="l00214"></a>00214 <span class="keyword">const</span> <span class="keywordtype">char</span> *value );
<a name="l00215"></a>00215
<a name="l00216"></a>00216
<a name="l00217"></a>00217 <span class="preprocessor">#endif </span><span class="comment">/* def _SWQ_H_INCLUDED_ */</span>
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