author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 22 Jan 2010 11:06:30 +0200 | |
changeset 0 | 08ec8eefde2f |
permissions | -rw-r--r-- |
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/* |
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** 2006 June 10 |
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** |
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** The author disclaims copyright to this source code. In place of |
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** a legal notice, here is a blessing: |
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** |
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** May you do good and not evil. |
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** May you find forgiveness for yourself and forgive others. |
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** May you share freely, never taking more than you give. |
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** |
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************************************************************************* |
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** Code for testing the virtual table interfaces. This code |
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** is not included in the SQLite library. It is used for automated |
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** testing of the SQLite library. |
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** |
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** $Id: test_schema.c,v 1.15 2008/07/07 14:50:14 drh Exp $ |
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*/ |
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|
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/* The code in this file defines a sqlite3 virtual-table module that |
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** provides a read-only view of the current database schema. There is one |
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** row in the schema table for each column in the database schema. |
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*/ |
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#define SCHEMA \ |
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"CREATE TABLE x(" \ |
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"database," /* Name of database (i.e. main, temp etc.) */ \ |
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"tablename," /* Name of table */ \ |
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"cid," /* Column number (from left-to-right, 0 upward) */ \ |
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"name," /* Column name */ \ |
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"type," /* Specified type (i.e. VARCHAR(32)) */ \ |
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"not_null," /* Boolean. True if NOT NULL was specified */ \ |
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"dflt_value," /* Default value for this column */ \ |
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"pk" /* True if this column is part of the primary key */ \ |
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")" |
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/* If SQLITE_TEST is defined this code is preprocessed for use as part |
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** of the sqlite test binary "testfixture". Otherwise it is preprocessed |
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** to be compiled into an sqlite dynamic extension. |
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*/ |
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#ifdef SQLITE_TEST |
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#include "sqliteInt.h" |
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#include "tcl.h" |
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#else |
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#include "sqlite3ext.h" |
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SQLITE_EXTENSION_INIT1 |
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#endif |
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#include <stdlib.h> |
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#include <string.h> |
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#include <assert.h> |
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typedef struct schema_vtab schema_vtab; |
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typedef struct schema_cursor schema_cursor; |
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/* A schema table object */ |
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struct schema_vtab { |
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sqlite3_vtab base; |
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sqlite3 *db; |
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}; |
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/* A schema table cursor object */ |
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struct schema_cursor { |
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sqlite3_vtab_cursor base; |
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sqlite3_stmt *pDbList; |
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sqlite3_stmt *pTableList; |
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sqlite3_stmt *pColumnList; |
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int rowid; |
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}; |
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/* |
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** None of this works unless we have virtual tables. |
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*/ |
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#ifndef SQLITE_OMIT_VIRTUALTABLE |
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/* |
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** Table destructor for the schema module. |
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*/ |
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static int schemaDestroy(sqlite3_vtab *pVtab){ |
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sqlite3_free(pVtab); |
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return 0; |
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} |
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/* |
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** Table constructor for the schema module. |
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*/ |
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static int schemaCreate( |
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sqlite3 *db, |
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void *pAux, |
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int argc, const char *const*argv, |
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sqlite3_vtab **ppVtab, |
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char **pzErr |
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){ |
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int rc = SQLITE_NOMEM; |
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schema_vtab *pVtab = sqlite3_malloc(sizeof(schema_vtab)); |
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if( pVtab ){ |
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memset(pVtab, 0, sizeof(schema_vtab)); |
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pVtab->db = db; |
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#ifndef SQLITE_OMIT_VIRTUALTABLE |
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rc = sqlite3_declare_vtab(db, SCHEMA); |
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#endif |
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} |
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*ppVtab = (sqlite3_vtab *)pVtab; |
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return rc; |
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} |
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|
104 |
|
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|
105 |
/* |
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|
106 |
** Open a new cursor on the schema table. |
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107 |
*/ |
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|
108 |
static int schemaOpen(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor){ |
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|
109 |
int rc = SQLITE_NOMEM; |
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110 |
schema_cursor *pCur; |
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|
111 |
pCur = sqlite3_malloc(sizeof(schema_cursor)); |
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|
112 |
if( pCur ){ |
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|
113 |
memset(pCur, 0, sizeof(schema_cursor)); |
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|
114 |
*ppCursor = (sqlite3_vtab_cursor *)pCur; |
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|
115 |
rc = SQLITE_OK; |
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116 |
} |
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117 |
return rc; |
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118 |
} |
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|
119 |
|
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120 |
/* |
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121 |
** Close a schema table cursor. |
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122 |
*/ |
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123 |
static int schemaClose(sqlite3_vtab_cursor *cur){ |
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124 |
schema_cursor *pCur = (schema_cursor *)cur; |
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125 |
sqlite3_finalize(pCur->pDbList); |
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|
126 |
sqlite3_finalize(pCur->pTableList); |
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127 |
sqlite3_finalize(pCur->pColumnList); |
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128 |
sqlite3_free(pCur); |
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129 |
return SQLITE_OK; |
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130 |
} |
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|
131 |
|
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132 |
/* |
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133 |
** Retrieve a column of data. |
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134 |
*/ |
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|
135 |
static int schemaColumn(sqlite3_vtab_cursor *cur, sqlite3_context *ctx, int i){ |
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136 |
schema_cursor *pCur = (schema_cursor *)cur; |
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|
137 |
switch( i ){ |
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|
138 |
case 0: |
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139 |
sqlite3_result_value(ctx, sqlite3_column_value(pCur->pDbList, 1)); |
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140 |
break; |
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Revision: 201003
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141 |
case 1: |
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142 |
sqlite3_result_value(ctx, sqlite3_column_value(pCur->pTableList, 0)); |
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|
143 |
break; |
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144 |
default: |
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|
145 |
sqlite3_result_value(ctx, sqlite3_column_value(pCur->pColumnList, i-2)); |
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|
146 |
break; |
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|
147 |
} |
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|
148 |
return SQLITE_OK; |
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|
149 |
} |
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|
150 |
|
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|
151 |
/* |
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152 |
** Retrieve the current rowid. |
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153 |
*/ |
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|
154 |
static int schemaRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){ |
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|
155 |
schema_cursor *pCur = (schema_cursor *)cur; |
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|
156 |
*pRowid = pCur->rowid; |
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Revision: 201003
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|
157 |
return SQLITE_OK; |
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Revision: 201003
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|
158 |
} |
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Revision: 201003
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diff
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|
159 |
|
08ec8eefde2f
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diff
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|
160 |
static int finalize(sqlite3_stmt **ppStmt){ |
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Revision: 201003
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|
161 |
int rc = sqlite3_finalize(*ppStmt); |
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Revision: 201003
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diff
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|
162 |
*ppStmt = 0; |
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Revision: 201003
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|
163 |
return rc; |
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Revision: 201003
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diff
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|
164 |
} |
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Revision: 201003
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diff
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|
165 |
|
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Revision: 201003
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diff
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|
166 |
static int schemaEof(sqlite3_vtab_cursor *cur){ |
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Revision: 201003
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diff
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|
167 |
schema_cursor *pCur = (schema_cursor *)cur; |
08ec8eefde2f
Revision: 201003
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diff
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|
168 |
return (pCur->pDbList ? 0 : 1); |
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Revision: 201003
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diff
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|
169 |
} |
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Revision: 201003
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parents:
diff
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|
170 |
|
08ec8eefde2f
Revision: 201003
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diff
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|
171 |
/* |
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Revision: 201003
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diff
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|
172 |
** Advance the cursor to the next row. |
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Revision: 201003
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diff
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|
173 |
*/ |
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Revision: 201003
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parents:
diff
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|
174 |
static int schemaNext(sqlite3_vtab_cursor *cur){ |
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Revision: 201003
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|
175 |
int rc = SQLITE_OK; |
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Revision: 201003
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diff
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|
176 |
schema_cursor *pCur = (schema_cursor *)cur; |
08ec8eefde2f
Revision: 201003
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|
177 |
schema_vtab *pVtab = (schema_vtab *)(cur->pVtab); |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
178 |
char *zSql = 0; |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
179 |
|
08ec8eefde2f
Revision: 201003
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|
180 |
while( !pCur->pColumnList || SQLITE_ROW!=sqlite3_step(pCur->pColumnList) ){ |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
181 |
if( SQLITE_OK!=(rc = finalize(&pCur->pColumnList)) ) goto next_exit; |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
182 |
|
08ec8eefde2f
Revision: 201003
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diff
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|
183 |
while( !pCur->pTableList || SQLITE_ROW!=sqlite3_step(pCur->pTableList) ){ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
184 |
if( SQLITE_OK!=(rc = finalize(&pCur->pTableList)) ) goto next_exit; |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
185 |
|
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
186 |
assert(pCur->pDbList); |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
187 |
while( SQLITE_ROW!=sqlite3_step(pCur->pDbList) ){ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
188 |
rc = finalize(&pCur->pDbList); |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
189 |
goto next_exit; |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
190 |
} |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
191 |
|
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
192 |
/* Set zSql to the SQL to pull the list of tables from the |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
193 |
** sqlite_master (or sqlite_temp_master) table of the database |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
194 |
** identfied by the row pointed to by the SQL statement pCur->pDbList |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
195 |
** (iterating through a "PRAGMA database_list;" statement). |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
196 |
*/ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
197 |
if( sqlite3_column_int(pCur->pDbList, 0)==1 ){ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
198 |
zSql = sqlite3_mprintf( |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
199 |
"SELECT name FROM sqlite_temp_master WHERE type='table'" |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
200 |
); |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
201 |
}else{ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
202 |
sqlite3_stmt *pDbList = pCur->pDbList; |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
203 |
zSql = sqlite3_mprintf( |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
204 |
"SELECT name FROM %Q.sqlite_master WHERE type='table'", |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
205 |
sqlite3_column_text(pDbList, 1) |
08ec8eefde2f
Revision: 201003
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|
206 |
); |
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|
207 |
} |
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|
208 |
if( !zSql ){ |
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|
209 |
rc = SQLITE_NOMEM; |
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|
210 |
goto next_exit; |
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diff
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|
211 |
} |
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|
212 |
|
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|
213 |
rc = sqlite3_prepare(pVtab->db, zSql, -1, &pCur->pTableList, 0); |
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|
214 |
sqlite3_free(zSql); |
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|
215 |
if( rc!=SQLITE_OK ) goto next_exit; |
08ec8eefde2f
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diff
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|
216 |
} |
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|
217 |
|
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|
218 |
/* Set zSql to the SQL to the table_info pragma for the table currently |
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219 |
** identified by the rows pointed to by statements pCur->pDbList and |
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220 |
** pCur->pTableList. |
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|
221 |
*/ |
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|
222 |
zSql = sqlite3_mprintf("PRAGMA %Q.table_info(%Q)", |
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223 |
sqlite3_column_text(pCur->pDbList, 1), |
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224 |
sqlite3_column_text(pCur->pTableList, 0) |
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225 |
); |
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|
226 |
|
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|
227 |
if( !zSql ){ |
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|
228 |
rc = SQLITE_NOMEM; |
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229 |
goto next_exit; |
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230 |
} |
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231 |
rc = sqlite3_prepare(pVtab->db, zSql, -1, &pCur->pColumnList, 0); |
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232 |
sqlite3_free(zSql); |
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|
233 |
if( rc!=SQLITE_OK ) goto next_exit; |
08ec8eefde2f
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diff
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|
234 |
} |
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|
235 |
pCur->rowid++; |
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|
236 |
|
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|
237 |
next_exit: |
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Revision: 201003
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|
238 |
/* TODO: Handle rc */ |
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239 |
return rc; |
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|
240 |
} |
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|
241 |
|
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242 |
/* |
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243 |
** Reset a schema table cursor. |
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244 |
*/ |
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|
245 |
static int schemaFilter( |
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|
246 |
sqlite3_vtab_cursor *pVtabCursor, |
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|
247 |
int idxNum, const char *idxStr, |
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|
248 |
int argc, sqlite3_value **argv |
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Revision: 201003
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|
249 |
){ |
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|
250 |
int rc; |
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Revision: 201003
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|
251 |
schema_vtab *pVtab = (schema_vtab *)(pVtabCursor->pVtab); |
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Revision: 201003
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|
252 |
schema_cursor *pCur = (schema_cursor *)pVtabCursor; |
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|
253 |
pCur->rowid = 0; |
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Revision: 201003
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|
254 |
finalize(&pCur->pTableList); |
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Revision: 201003
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|
255 |
finalize(&pCur->pColumnList); |
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Revision: 201003
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diff
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|
256 |
finalize(&pCur->pDbList); |
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Revision: 201003
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diff
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|
257 |
rc = sqlite3_prepare(pVtab->db,"PRAGMA database_list", -1, &pCur->pDbList, 0); |
08ec8eefde2f
Revision: 201003
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|
258 |
return (rc==SQLITE_OK ? schemaNext(pVtabCursor) : rc); |
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Revision: 201003
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diff
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|
259 |
} |
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Revision: 201003
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diff
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|
260 |
|
08ec8eefde2f
Revision: 201003
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diff
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|
261 |
/* |
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Revision: 201003
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parents:
diff
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|
262 |
** Analyse the WHERE condition. |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
263 |
*/ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
264 |
static int schemaBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
265 |
return SQLITE_OK; |
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Revision: 201003
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parents:
diff
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|
266 |
} |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
267 |
|
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
268 |
/* |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
269 |
** A virtual table module that merely echos method calls into TCL |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
270 |
** variables. |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
271 |
*/ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
272 |
static sqlite3_module schemaModule = { |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
273 |
0, /* iVersion */ |
08ec8eefde2f
Revision: 201003
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diff
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|
274 |
schemaCreate, |
08ec8eefde2f
Revision: 201003
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diff
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|
275 |
schemaCreate, |
08ec8eefde2f
Revision: 201003
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diff
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|
276 |
schemaBestIndex, |
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Revision: 201003
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parents:
diff
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|
277 |
schemaDestroy, |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
278 |
schemaDestroy, |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
279 |
schemaOpen, /* xOpen - open a cursor */ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
280 |
schemaClose, /* xClose - close a cursor */ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
281 |
schemaFilter, /* xFilter - configure scan constraints */ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
282 |
schemaNext, /* xNext - advance a cursor */ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
283 |
schemaEof, /* xEof */ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
284 |
schemaColumn, /* xColumn - read data */ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
285 |
schemaRowid, /* xRowid - read data */ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
286 |
0, /* xUpdate */ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
287 |
0, /* xBegin */ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
288 |
0, /* xSync */ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
289 |
0, /* xCommit */ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
290 |
0, /* xRollback */ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
291 |
0, /* xFindMethod */ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
292 |
0, /* xRename */ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
293 |
}; |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
294 |
|
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
295 |
#endif /* !defined(SQLITE_OMIT_VIRTUALTABLE) */ |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
296 |
|
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
297 |
#ifdef SQLITE_TEST |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
298 |
|
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
299 |
/* |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
300 |
** Decode a pointer to an sqlite3 object. |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
301 |
*/ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
302 |
extern int getDbPointer(Tcl_Interp *interp, const char *zA, sqlite3 **ppDb); |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
303 |
|
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
304 |
/* |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
305 |
** Register the schema virtual table module. |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
306 |
*/ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
307 |
static int register_schema_module( |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
308 |
ClientData clientData, /* Not used */ |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
309 |
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
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int objc, /* Number of arguments */ |
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Tcl_Obj *CONST objv[] /* Command arguments */ |
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){ |
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sqlite3 *db; |
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if( objc!=2 ){ |
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Tcl_WrongNumArgs(interp, 1, objv, "DB"); |
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return TCL_ERROR; |
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} |
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if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ) return TCL_ERROR; |
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#ifndef SQLITE_OMIT_VIRTUALTABLE |
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sqlite3_create_module(db, "schema", &schemaModule, 0); |
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#endif |
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return TCL_OK; |
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} |
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|
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/* |
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** Register commands with the TCL interpreter. |
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*/ |
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int Sqlitetestschema_Init(Tcl_Interp *interp){ |
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static struct { |
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char *zName; |
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Tcl_ObjCmdProc *xProc; |
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void *clientData; |
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} aObjCmd[] = { |
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{ "register_schema_module", register_schema_module, 0 }, |
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}; |
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int i; |
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for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){ |
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Tcl_CreateObjCommand(interp, aObjCmd[i].zName, |
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aObjCmd[i].xProc, aObjCmd[i].clientData, 0); |
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} |
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return TCL_OK; |
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} |
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|
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#else |
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|
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/* |
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** Extension load function. |
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*/ |
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int sqlite3_extension_init( |
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sqlite3 *db, |
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char **pzErrMsg, |
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const sqlite3_api_routines *pApi |
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){ |
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SQLITE_EXTENSION_INIT2(pApi); |
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#ifndef SQLITE_OMIT_VIRTUALTABLE |
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sqlite3_create_module(db, "schema", &schemaModule, 0); |
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#endif |
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return 0; |
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} |
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|
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#endif |